Image forming apparatus and method of the same

According to one embodiment, a laser controller generates a signal which corresponds to an output signal of a laser beam detection sensor before detecting an abnormality, in which the abnormality is detected, in a pseudo manner, on the basis of an output signal of a laser beam detection sensor in which the abnormality is not detected. In addition, the laser controller controls a laser unit which corresponds to the laser beam detection sensor in which the abnormality is detected, according to the generated signal.

Optical scanning device

An optical scanning device has an incident optical system in which optical path lengths from laser diodes to a polygon mirror become longer in the order of the optical path length of the laser beam associated with black, that of the laser beam associated with cyan, that of the laser beam associated with magenta and that of the laser beam associated with yellow. The optical scanning device has an outgoing optical system in which optical path lengths from the polygon mirror to mirrors at which laser beam eclipse occurs become shorter in the order of the optical path length of the laser beam associated with black, that of the laser beam associated with cyan, that of the laser beam associated with magenta and that of the laser beam associated with yellow.

Optical writer and image forming apparatus including same

An optical writer includes a housing, a light source, a deflector, and a plurality of optical elements. The housing includes a plurality of surfaces, one of which includes a substantially flat portion having an opening formed therein and a curved portion curved in the shape of an arc of a circle in cross-section. The light source is enclosed within the housing and projects light through the opening and onto a target. The deflector is enclosed within the housing and deflects the light projected from the light source in a main scanning direction. The plurality of optical elements is enclosed within the housing and directs the light deflected by the deflector onto the target.

Imaging head for a flat bed scanner

A method for imaging using a flatbed imaging system includes providing first imaging data to a first imaging source; providing second imaging data to a second imaging source; imaging a first beam from the first imaging source at a first height on a rotating multi-facet spinner; imaging a second beam from the second imaging source at a second height on the rotating multi-facet spinner; distributing the first beam on a first location on a printing plate; and distributing the second beam on a second location on a the printing plate.

Optical scanner and image forming apparatus including same

An optical scanner includes a light source for projecting a light beam, a deflector for deflecting the light beam, a reflective member for reflecting the light beam toward a target, a contact member, and a pressing member. The reflective member includes a reflective plane and a rear plane opposite the reflective plane. The contact member contacts one of the rear plane of the reflective member and a first lateral plane perpendicular to the reflective plane to position the reflective member in place. The pressing member presses the reflective member against the contact member and includes a first pressing portion to press the reflective plane of the reflective member and a second pressing portion to press a ridge of the reflective member at which the reflective plane and a second lateral plane opposite the first lateral plane and perpendicular to the reflective plane of the reflective member meet.

Printing system, raster ouput scanner, and method with electronic banding compensation using facet-dependent smile correction

Raster Output Scanners and printing systems are presented along with methods for mitigating banding in printing systems, in which electronic banding compensation is employed using cross-process direction light source intensity banding correction profiles tailored to corresponding reflective facets of a rotating polygon.

LIGHT BEAM SCANNING DEVICE AND IMAGE FORMING APPARATUS

In a light beam scanning device, a plurality of light sources, which irradiates a plurality of light beams in a first direction and is retained by a holder, are disposed at distance from one another in a second direction orthogonal to the first direction. The plurality of light beams are incident, via a coupling optical system, to deflecting and reflecting surfaces of a deflector from a direction that is tilted with respect to a plane orthogonal to the rotational shaft of the deflector. The holder is supported by a housing of the light beam scanning device at a plurality of different positions in a third direction extending from the light source to the coupling optical system. 1. A light beam scanning device that scans a plurality of light beams onto a plurality of scanned surfaces in a first direction , the device comprising:a plurality of light sources disposed at distance from one another in a second direction that is orthogonal to at least the first direction and configured to irradiate the plurality of light beams;a holder configured to retain the plurality of light sources;a coupling optical system configured to couple the plurality of light beams;a deflector configured to deflect the plurality of light beams received through the coupling optical system, the deflector having a plurality of deflecting and reflecting surfaces each rotating about a rotational shaft of the deflector;a scanning optical system configured to focus the plurality of light beams deflected by the deflector, respectively, onto the plurality of scanned surfaces; anda housing configured to accommodate therein at least the holder,wherein the plurality of light beams irradiated by the plurality of light sources are incident to the deflecting and reflecting surfaces of the deflector from a direction that is tilted with respect to a plane orthogonal to the rotational shaft of the deflector, andthe holder is supported by the housing at a plurality of different positions in a third direction ...

Optical scanning device and image forming apparatus

An optical scanning device includes: a light source device that emits five light beams corresponding to four basic colors and a single specific color; and five scanning optical systems corresponding the five light beams. One light beam in a first waveband among the light beams corresponding to the four basic colors enters one scanning optical system of the five scanning optical systems. The one scanning optical system includes a dichroic mirror that transmits a light beam in a second waveband different from the first waveband. An angle θb formed between a normal to the incidence plane of the dichroic mirror and orthogonal projection to an assumed plane orthogonal to the main scanning corresponding direction of the incident path of the light beam to the incidence plane of the dichroic mirror is set at an angle of 0° or more and an angle of 45° or less.

OPTICAL SCANNING APPARATUS, SYSTEM AND METHOD

An optical scanning apparatus, a system and a method of optical scanning independently determine illumination spot size and spacing. The apparatus includes an array of optical emitters to provide a plurality of optical beams and a plurality of microlenses to receive the optical beams. The microlenses form an intermediate image of the array at substantially unity array magnification. The apparatus further includes an adjustable collimator to receive the plurality of optical beams from the intermediate image, a beam scanner to scan the optical beams in an in-scan direction, and a scan lens to focus the scanned optical beams. An arrangement of illumination spots forms an image of the array. 1. An optical scanning apparatus comprising:an array of optical emitters to provide a plurality of optical beams;a plurality of microlenses to receive the optical beams and form an intermediate image of the array at substantially unity array magnification, the intermediate image comprising a plurality of spots, each spot corresponding to a different one of the optical beams;a collimator to receive the plurality of optical beams from the intermediate image;a beam scanner to scan the optical beams received from the collimator in an in-scan direction; anda scan lens to focus the scanned optical beams to form an arrangement of illumination spots on a scanning surface, the arrangement of illumination spots forming an image of the array.2. The optical scanning apparatus of claim 1 , wherein each microlens of the plurality comprises a first microlens element having a first associated magnification to provide fast-axis direction convergence of the corresponding optical beam and a second microlens element having a second associated magnification to provide slow-axis direction convergence of the corresponding optical beam.3. The optical scanning apparatus of claim 1 , wherein each microlens of the plurality has a first surface to provide fast-axis direction convergence of the optical beam and ...

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH SAME

In a first scanning lens, a first lens section and a second lens section are vertically overlapped in such a manner as to separate lens centers thereof by a first distance. In a second scanning lens, a third lens section and a fourth lens section are vertically overlapped in such a manner as to separate lens centers thereof by a second distance equal to the first distance. A vertical positional relationship of the first lens section with the second lens section is the same as a vertical positional relationship of the third lens section with the fourth lens section. Further, a separating direction of a lens center of the first lens section from that of the second lens section is opposite to a separating direction of a lens center of the third lens section from that of the fourth lens section. 1. An optical scanning device for scanning peripheral surfaces of a first photoconductive drum , a second photoconductive drum , a third photoconductive drum and a fourth photoconductive drum rotating about drum rotary shafts with light beams , comprising:a casing including a base part having a principal surface parallel to the drum rotary shafts; anda polygon mirror arranged in a first area on the principal surface of the base part, including a mirror rotary shaft extending in a direction perpendicular to the principal surface, a first deflection surface and a second deflection surface, first and second light beams being incident on the first deflection surface at the same timing, third and fourth light beams being incident on the second deflection surface at the same timing, and configured to scan the peripheral surfaces of the respective first and second photoconductive drums in a first main scanning direction by reflecting the first and second light beams in a first reflecting direction and scan the peripheral surfaces of the respective third and fourth photoconductive drums in a second main scanning direction opposite to the first main scanning direction by reflecting the ...

OPTICAL DEFLECTOR, OPTICAL SCANNING APPARATUS, AND IMAGE FORMING APPARATUS

An optical deflector including a rotary member supported by a bearing shaft and rotatively driven by a motor for deflecting a plurality of laser beams separated from each other in a rotational axis direction of the rotary member is disclosed. The optical deflector includes a polygon mirror having four sides arranged about the rotational axis direction. Each of the four sides is a continuous plane having a plurality of effective reflection areas separated from each other in the rotational axis direction. 1. (canceled)2. An optical deflector including a rotary member supported by a bearing shaft and rotatively driven by a motor for deflecting a plurality of laser beams separated from each other in a rotational axis direction of the rotary member , the optical deflector comprising:a polygon mirror having multiple reflection surfaces arranged about the rotational axis direction;each of the multiple reflection surfaces is a plane of continuous material having a plurality of effective reflection areas separated from each other in the rotational axis direction by a non-reflective region;the plurality of laser beams incident on the polygon mirror are parallel, and the plurality of laser beams are perpendicular to a rotational axis of the polygon mirror;each of the multiple reflection surfaces includes a first effective reflection area, a second effective reflection area, and a middle area, the middle area including the non-reflective region which does not deflect any of the plurality of laser beams; anda distance, in which the first effective reflection area and the second effective reflection area are separated, is substantially equivalent to a distance between an upper laser beam and a lower laser beam of the plurality of laser beams.3. The optical deflector according to claim 2 , wherein the multiple reflection surfaces include four sides.4. The optical deflector as claimed in claim 2 , wherein the polygon mirror is formed of a material having a Young's modulus in a ...

Image Forming Apparatus That Obtains Variation Characteristic of Positional Deviation Amount of Light Beam

An image forming apparatus includes a light scanning device, a light detection unit, and a positional-deviation-amount calculation unit. The light detection unit includes a slit-shaped first light detection region and a slit-shaped second light detection region arranged to have mutually different angles with respect to a scanning direction of the light beam, and outputs a detection signal when the light beam passes through each of the light detection regions. The positional-deviation-amount calculation unit calculates a time period until when the light beam passes through the second light detection region from when the light beam has passed through the first light detection region for each scan of the light beam based on the detection signal output from the light detection unit, and calculates a variation characteristic of a positional deviation amount in a sub-scanning direction of the light beam associated with rotation of the polygon mirror. 1. An image forming apparatus comprising:a light scanning device that includes a light source, a polygon mirror that reflects a light beam emitted from the light source and causes the light beam to deflectively scan, and an optical element located in an optical path of the light beam deflectively scanned at the polygon mirror;a light detection unit that is located in an optical path of the light beam after the light beam has passed through the optical element, includes a slit-shaped first light detection region and a slit-shaped second light detection region arranged to have mutually different angles with respect to a scanning direction of the light beam, and outputs a detection signal when the light beam passes through each of the light detection regions; anda positional-deviation-amount calculation unit that calculates a time period until when the light beam passes through the second light detection region from when the light beam has passed through the first light detection region for each scan of the light beam based on ...

OPTICAL MONITORING OF SCAN PARAMETERS

Scanning apparatus includes a transmitter, which is configured to emit a beam comprising pulses of light, and a scanner, which is configured to scan the beam along a scan axis over a specified angular range. A scattering line extends across a path of the scanned beam. A receiver is configured to receive the light scattered from the scattering line and to generate an output indicative of an intensity of the scattered light. A controller is coupled to process the output of the receiver so as to monitor operation of the scanner. 1. Scanning apparatus , comprising:a transmitter, which is configured to emit a beam comprising pulses of light;a scanner, which is configured to scan the beam along a scan axis over a specified angular range;a scattering line, which extends across a path of the scanned beam;a receiver, which is configured to receive the light scattered from the scattering line and to generate an output indicative of an intensity of the scattered light; anda controller, which is coupled to process the output of the receiver so as to monitor operation of the scanner.2. The apparatus according to claim 1 , wherein the scattering line comprises a filament mounted so as to extend across the path of the scanned beam.3. The apparatus according to claim 1 , and comprising a transparent optical element positioned in the path of the scanned beam claim 1 , wherein the scattering line is scribed across the transparent optical element.4. The apparatus according to claim 1 , wherein the receiver is further configured to receive the light reflected from a scene beyond the scattering line within the specified angular range claim 1 , wherein the output is further indicative of the pulses returned from the scene.5. The apparatus according to claim 4 , wherein the controller is configured to process the output of the receiver so as to generate a three-dimensional map of the scene based on the returned pulses.6. The apparatus according to claim 1 , wherein the controller is ...

LASER ASSEMBLY FOR A LASER PRINTER

An example laser assembly for a laser printer may include a plurality of lasers to emit respective photons; a prism to redirect the respective laser beams emitted from the plurality of lasers toward a collimator lens of the laser printer to generate a photon beam; and one or more processors to: determine a timing schedule for individually activating the plurality of lasers based on a resolution setting of the laser printer, and when printing at a resolution corresponding to the resolution setting, control activation of each of the plurality of lasers to emit the respective photons according to the timing schedule to form the photon beam. 1. A system comprising:a plurality of lasers that include a first laser and a second laser; 'stagger times at which the first laser and the second laser are at least one of powered or powered off; and', 'a laser controller configured toa cone prism to redirect photons of the plurality of lasers toward a mirror.2. The system of claim 1 ,wherein the plurality of lasers further include a third laser, andwherein, when staggering the times, the laser controller is configured to stagger the times at which the first laser, the second laser, and the third laser are at least one of powered or powered off.3. The system of claim 1 , further comprising: 'wherein the cone prism redirects the photons of the plurality of lasers toward the collimator lens.', 'a collimator lens that is between the cone prism and the mirror,'}4. The system of claim 1 , further comprising:a collimator lens shaped to shape focus an adjustable photon beam before the adjustable photon beam reaches the mirror.5. The system of claim 1 , wherein the plurality of lasers are configured to emit the photons into a conical surface of the cone prism.6. The system of claim 1 , wherein the cone prism redirects the photons ninety degrees through a tip of the cone prism.7. The system of claim 1 , where a photon beam is formed from the cone prism.8. The system of claim 7 , wherein the ...

OPTICAL SCANNING DEVICE INCLUDING SYNCHRONIZATION DETECTION SENSOR AND ELECTROPHOTOGRAPHIC PRINTER INCLUDING THE SAME

An optical scanning device for an electrophotographic printer includes a light source that radiates a light beam and a light deflector that deflects the light beam radiated by the light source in a main scanning direction. The optical scanning device also includes a synchronization detection sensor having a sensing region that receives a portion of the light beam deflected by the light deflector. The sensing region has a greater length in the main scanning direction than in a sub-scanning direction. 1. An optical scanning device for an electrophotographic printer , the optical scanning device comprising:a light source to radiate a light beam;a light deflector to deflect the light beam in a main scanning direction; anda synchronization detection sensor having a sensing region to receive a portion of the light beam deflected by the light deflector, a length of the sensing region in the main scanning direction being greater than a length of the sensing region in a sub-scanning direction.2. The optical scanning device of claim 1 , further comprising a light blocking member claim 1 , provided on at least one side of the sensing region in the main scanning direction claim 1 , to block diffusely reflected light.3. The optical scanning device of claim 2 , wherein the light blocking member comprises a first light blocking member and a second light blocking member spaced apart from one another in the main scanning direction to form a slit through which the light beam passes for the portion of the light beam to be incident on the sensing region.4. The optical scanning device of claim 2 , further comprising a frame to support the light source claim 2 , the light deflector claim 2 , and the synchronization detection sensor claim 2 ,wherein the light blocking member comprises a shading rib supported by the frame.5. The optical scanning device of claim 4 , wherein the shading rib comprises a first shading rib and a second shading rib spaced apart from one another in the main ...

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS

An optical scanning device includes a vertical-cavity surface-emitting laser light source that emits laser beams perpendicular to a top surface thereof; a first optical system that couples the beams from the light source; a deflecting unit that deflects the beams; a second optical system that guides the beams from the first optical system to the deflecting unit; a third optical system that focuses the beams deflected by the deflecting unit into an optical spot on a scanned surface; and a light-quantity adjusting element disposed between the light source and the deflecting unit and having a substrate formed of a first and second surfaces. The first surface of the light-quantity adjusting element is coated with neutral density coating and the second surface is coated with antireflection coating so that reflectance of the second surface is made smaller than reflectance of the first surface. 18-. (canceled)9. An optical scanning device comprising:a vertical-cavity surface-emitting laser light source that emits laser beams perpendicular to a top surface thereof;a first optical system that couples the laser beams from the light source;a beam limiting element that limits a thickness of the laser beams;a deflecting unit deflects the laser beams;a second optical system that guides the laser beams from the first optical system to the deflecting unit; anda third optical system that focuses the laser beams deflected by the deflecting unit into an optical spot on a scanned surface, wherein the second optical system includes a cylindrical lens having a curved surface coated with neutral density coating.10. The optical scanning device according to claim 9 , wherein the second optical system includes a plurality of cylindrical lenses claim 9 , and a curved surface of one cylindrical lens is coated with the neutral density coating.11. The optical scanning device according to claim 9 , wherein longitudinal mode hopping does not occur in the vertical-cavity surface-emitting laser even ...

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME

An optical scanning device includes a rotating polygon mirror, a light source that irradiates first and second light beams at one side of the rotating polygon mirror and irradiates third and fourth light beams at the other side thereof, a first optical element that reflects the first light beam and allows the second light beam to pass therethrough, a second optical element that reflects the second light beam, a third optical element that allows the third and fourth light beams to pass therethrough, and a fourth optical element that reflects the fourth light beam. The second light beam is a light beam corresponding to yellow, the first, the third, and the fourth light beams are light beams corresponding to three colors other than the yellow. Between the third and fourth optical elements, a scanning lens is arranged. Between the first and second optical elements, a scanning lens is not arranged. 1. An optical scanning device comprising:a rotating polygon mirror;a light source that irradiates a first light beam and a second light beam which has a wavelength different from a wavelength of the first light beam toward the rotating polygon mirror at one side of the rotating polygon mirror, and irradiates a third light beam and a fourth light beam which has a wavelength different from a wavelength of the third light beam toward the rotating polygon mirror at a remaining side of the rotating polygon mirror;a first optical element that is provided at the one side of the rotating polygon mirror, reflects the first light beam deflected and scanned by the rotating polygon mirror toward a first surface to be scanned, and allows the second light beam to pass therethrough;a second optical element that is provided radially outside the first optical element and reflects the second light beam having passed through the first optical element toward a second surface to be scanned;a third optical element that is provided at the remaining side of the rotating polygon mirror, reflects the ...

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME

An optical scanning device includes a deflector configured to deflect first and second beams to scan an effective area of a first scanned surface in a main scanning direction, and first and second imaging optical systems configured to guide the first and second beams deflected by the deflector to first and second areas, respectively, which are included in the effective area and different from each other in the main scanning direction. In the main scanning direction, the first area and the second area are asymmetric in width with respect to an optical axis. 1. An optical scanning device comprising:a deflector configured to deflect first and second beams to scan an effective area of a first scanned surface in a main scanning direction; andfirst and second imaging optical systems configured to guide the first and second beams deflected by the deflector to first and second areas which are included in the effective area and different from each other in the main scanning direction,wherein in the first area, a width of a third area, in the first area, on a side distant from the second area with respect to a first optical axis of the first imaging optical system is longer than a width of a fourth area, in the first area, on a side close to the second area with respect to the first optical axis in the main scanning direction, andwherein in the second area, a width of a fifth area on a side distant from the first area with respect to a second optical axis of the second imaging optical system is longer than a width of a sixth area on a side close to the first area with respect the second optical axis in the main scanning direction.2. The optical scanning device according to claim 1 , wherein the first and second beams are incident on the deflector from different sides from each other with respect to a reference plane including a rotational axis of the deflector and perpendicular to the main scanning direction.3. The optical scanning device according to claim 2 , wherein in the ...

IMAGE FORMING APPARATUS AND CONTROL METHOD OF IMAGE FORMING APPARATUS

An image forming apparatus includes first and second light sensors positioned in a laser scanning system of at least one color, such that scanned light is detected by the first light sensor and then by the second light sensor and light sensing surfaces of the first and second light sensors are not parallel, and a control unit connected to the first and second light sensors and configured to determine a time difference in the timing of light detection by the first and second light sensors and to execute a color position shift operation upon determining that the time difference is greater than a first threshold value. 1. An image forming apparatus comprising:a polygon mirror configured to rotate to scan a light in a scanning direction;a first light sensor configured to detect the light reflected by the polygon mirror, the first light sensor having a longitudinal side crossing the scanning direction;a second light sensor configured to detect the light reflected by the polygon mirror, the second light sensor having a longitudinal side crossing the scanning direction, the light reflected by the polygon mirror passing both of the first light sensor and the second light sensor, a light sensing surface of the first light sensor being not parallel to a light sensing surface of the second light sensor; anda control unit configured to determine a difference between a first timing of detecting the light by the first light sensor and a second timing of detecting the light by the second light sensor and perform a color position shift operation based on the difference.2. The apparatus according to claim 1 , further comprising:a third light sensor configured to detect the light reflected by the polygon mirror, the third light sensor having a longitudinal side crossing the scanning direction; anda fourth light sensor configured to detect the light reflected by the polygon mirror, the fourth light sensor having a longitudinal side crossing the scanning direction, the light reflected ...

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS

A first receiving recess () and a second receiving recess () are formed on a surface of the housing, on which a pair of image forming lenses () are placed, to receive a first temperature sensor () and a second temperature sensor (), and are formed in positions, in which thermal deformation characteristics of the housing are approximately identical at one side and the other side of a first straight line K, while interposing the first straight line K therebetween. 1. An optical scanning device comprising:a rotating polygon mirror;a housing that receives the rotating polygon mirror;a pair of light sources disposed at both sides of a first straight line passing through an axis of the rotating polygon mirror while interposing the first straight line therebetween when viewed from an axis direction of the rotating polygon mirror;a pair of scanning optical systems each including a pair of image forming lenses disposed to face each other while interposing the first straight line therebetween;a temperature sensor provided to at least one of the pair of image forming lenses to measure a temperature of the image forming lens; anda correction control unit that corrects a positional shift in a main scanning direction of light beam emitted from each of the light sources on the basis of the temperature detected by the temperature sensor,wherein a first receiving recess and a second receiving recess are formed on a surface of the housing, on which the pair of image forming lenses are placed,the temperature sensor is received in at least one of the first receiving recess and the second receiving recess, andthe first receiving recess and the second receiving recess are formed in positions, in which thermal deformation characteristics of the housing are approximately identical at one side and the other side of the first straight line, while interposing the first straight line therebetween.2. The optical scanning device of claim 1 , wherein the first receiving recess and the second ...

OPTICAL SCANNING APPARATUS

The optical scanning apparatus including a light source unit having plurality laser light sources for emitting laser light and one lens in which the laser light emitted from the plurality laser light sources is transmitted, a deflect device that deflects and scans the laser light on an image bearing member, an optical member that images the laser light on the image bearing member, a housing that internally includes the deflect device and the optical member, the housing forms an opening portion that passes through the laser light emitted from the plurality of the laser light sources, and an elastic member that blocks a gap between the lens and the opening portion, the elastic member being pinched between the lens and the housing. It achieves sealing of the flow-in path and sealing of the gap between the light source unit and the housing with a simple configuration. 18.-. (canceled)9. An optical scanning apparatus comprising:a light source that emits a laser light;a lens through which the laser light emitted from the light source is passed;a support member directly supporting the lens; anda deflect device that deflects the laser light and scans an image bearing member with the laser light,wherein the support member includes a protruding portion projecting to the downstream side in a laser light emitting direction with respect to a laser light emitting surface of the lens,wherein as viewed in the laser light emitting direction, the protruding portion surrounds a peripheral portion of the lens,wherein the protruding portion includes an opened portion that exposes a side surface of the lens,wherein a plurality of plane surface portions are provided on outer surfaces of the protruding portion, andwherein with respect to an area surrounded by a plurality of planes each of which includes at least one plane surface portion among the plurality of the plane surface portions, the area as viewed in the laser light emitting direction is a quadrilateral, and the area includes a ...

OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS

The optical scanning apparatus comprises a plurality of light sources; a light deflection member configured to deflect luminous flux from the plurality of the light sources to a main scanning direction; and a plurality of turning back mirrors configured to reflect luminous flux deflected in the main scanning direction by the light deflection member towards a scanning object moving in a sub-scanning direction. Adjustment mechanisms are selectively mounted in the turning back mirrors in which reflection directions with respect to incident directions of the luminous flux at the time of being developed excluding the other turning back mirrors in the middle to adjust postures and shapes thereof in a state in which optical paths from the plurality of the turning back mirrors to the corresponding scanning objects are fixed at the scanning object side which is an image surface. 1. An optical scanning apparatus , comprising:a plurality of light sources;a light deflection member configured to deflect luminous flux from the plurality of light sources in a main scanning direction;a plurality of turning back mirrors configured to reflect luminous flux deflected in the main scanning direction by the light deflection member towards a scanning object moving in a sub-scanning direction; andadjustment mechanisms selectively mounted on the plurality of turning back mirrors in which reflection directions with respect to incident directions of the luminous flux at a time of being developed excluding other turning back mirrors in a middle to adjust postures and shapes thereof in a state in which optical paths from the plurality of tho turning back mirrors to the corresponding scanning objects are fixed at the scanning object side which is an image surface,wherein an adjustment mechanism of the adjustment mechanisms comprises a cam on a first side of a turning back mirror and a pressing member on a second side of the turning back mirror, and wherein the first side is opposite the second ...

DRAWING APPARATUS, AND METHOD OF MANUFACTURING ARTICLE

A drawing apparatus, that performs drawing on a substrate with charged particle beams based on first image data associated with a first grid, includes a blanker array including a plurality of columns each including a plurality of blankers, a scanning deflector configured to deflect at least one of the charged particle beams that has not been blanked by the blanker array to cause the deflected beam to scan the substrate in a scan direction, a drive circuit configured to sequentially drive the blanker array with respect to each of the columns periodically to define a second grid on the substrate that is displaced from the first grid in the scan direction, and a controller configured to generate second image data on the second grid by performing interpolation processing on the first image data and to control the drive circuit based on the second image data. 1. A drawing apparatus that performs drawing on a substrate with a plurality of charged particle beams based on first image data associated with a first grid , the apparatus comprising:a blanker array including a plurality of columns each including a plurality of blankers;a scanning deflector configured to deflect at least one of the charged particle beams that has not been blanked by the blanker array to cause the deflected beam to scan the substrate in a scan direction;a drive circuit configured to sequentially drive the blanker array with respect to each of the plurality of columns periodically to define a second grid on the substrate that is displaced from the first grid in the scan direction; anda controller configured to generate second image data on the second grid by performing interpolation processing on the first image data associated with the first grid and to control the drive circuit based on the second image data.2. The drawing apparatus according to claim 1 , wherein the scanning deflector is configured to deflect the at least one of the charged particle beams in a main scan direction claim 1 , ...

OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME

An optical scanning apparatus includes first and second light source units including respective light sources; a rotating polygon mirror that performs deflection scanning of laser beams emitted from the light sources included in the first and second light source units; and a positioning member including a first abutting portion on which the first light source unit abuts and a second abutting portion on which the second light source unit abuts, the positioning member positioning the first and second light source units. The first and second light source units are positioned by the positioning member and arranged next to each other in a rotation axis direction of the rotating polygon mirror. The positioning member is a single member disposed between the first and second light source units in the rotation axis direction. 1. An optical scanning apparatus comprising:first and second light source units including respective light sources;a rotating polygon mirror that performs deflection scanning of laser beams emitted from the light sources of the first and second light source units; anda positioning member including a first abutting portion on which the first light source unit abuts and a second abutting portion on which the second light source unit abuts, the positioning member positioning the first and second light source units,wherein the first and second light source units are positioned by the positioning member and arranged next to each other in a rotation axis direction of the rotating polygon mirror, andwherein the positioning member is a single member disposed between the first and second light source units in the rotation axis direction.2. The optical scanning apparatus according to claim 1 , further comprising:pressing members that press the first and second light source units against the first and second abutting portions, respectively, to fix the first and second light source units to the positioning member,wherein directions in which the pressing members ...

MULTI-BEAM SCANNER AND CONFOCAL OPTICAL SYSTEM INCLUDING THE SAME

A multi-beam scanner may include a scan lens and a reflecting mirror. The scan lens may have eccentric incidence points offset from a center point of the scan lens to which at least two light beams may be irradiated. The scan lens may be configured to concentrate the light beams. The concentrated light beams may be incidence to the reflecting mirror. Thus, an object may be scanned by the light beams using only one scan lens so that the multi-beam scanner may have a less complex structure. 1. A multi-beam scanner comprising:a scan lens having at least two eccentric incidence points to which at least two light beams are directed, wherein the scan lens is configured to focus the at least two light beams to a location; anda reflecting mirror positioned at the location and configured to reflect the at least two light beams.2. The multi-beam scanner of claim 1 , wherein the at least two light beams are focused to a point on the reflecting mirror.3. The multi-beam scanner of claim 1 , wherein the eccentric incidence points are positioned on a horizontal plane.4. The multi-beam scanner of claim 1 , wherein the reflecting mirror is configured to reflect the at least two light beams to the scan lens.5. The multi-beam scanner of claim 4 , wherein the at least two light beams reflected from the reflecting mirror are converted into planar light beams through eccentric exit points of the scan lens that are different from the eccentric incidence points.6. The multi-beam scanner of claim 5 , wherein the eccentric exit points are positioned on a horizontal plane.7. The multi-beam scanner of claim 1 , wherein the reflecting mirror comprises a polygon mirror having a plurality of reflecting faces and is configured to be rotated about an axis.8. The multi-beam scanner of claim 1 , wherein the reflecting mirror comprises a galvano mirror having one reflecting face claim 1 , and wherein the reflecting mirror is configured to be alternately rotated about an axis in a first direction and ...

IMAGE FORMING APPARATUS

An image forming apparatus includes a control unit: starting up a rotary polygon mirror based on a first signal output by a driving unit thereof; causing a light source to emit a laser-beam while controlling a rotational speed of the rotary polygon mirror based on the first signal to acquire a second signal output from a detecting unit of the laser-beam; turning off the light source after acquiring a phase relation between the first and second signals; causing a charging unit to charge a photosensitive member; making the laser-beam to enter onto the detecting unit without exposing the photosensitive member based on the phase relation in response to the rotational speed reaching a target speed; controlling the rotational speed based on the second signal in response to the laser-beam being entered; and starting image formation in response to the rotational speed converging within a predetermined range including the target speed. 1. An image forming apparatus comprising:a light source;a rotary polygon mirror configured to scan with a laser beam emitted from the light source;a driving unit configured to drive the rotary polygon mirror and output a first signal corresponding to rotation of the rotary polygon mirror;a photosensitive member on which a latent image is formed by scanning with the laser beam by the rotary polygon mirror;a charging unit configured to charge the photosensitive member before the latent image is formed on the photosensitive member;a developing unit configured to develop the latent image formed on the photosensitive member with toner to form a toner image;a detecting unit provided in a second region obtained by excepting a first region, which is to be scanned with the laser beam to form the latent image on the photosensitive member, from a range to be scanned with the laser beam, the detecting unit being configured to output a second signal in response to detection of the laser beam;a control unit configured to control a light amount of the laser ...

MULTI-BEAM LASER SCANNING SYSTEM AND METHOD

A multi-beam laser scanning system comprising a laser, a beam splitter, a first scanning unit, a second scanning unit, and a control unit is disclosed herein. The laser is used for generating an initial laser beam. The beam splitter is used for splitting the initial laser beam into a first laser beam and a second laser beam. The first scanning unit is used for deflecting the first laser beam along a desired direction. The second scanning unit is used for deflecting the second laser beam along a desired direction. The control unit is coupled to the first and second scanning units and arranged to output control signals to the first and second scanning units to manufacture an object. 1. A multi-beam laser scanning system , comprising:a laser configured to generate an initial laser beam;a beam splitter configured to split the initial laser beam into a first laser beam and a second laser beam;a first scanning unit configured to deflect the first laser beam along a desired direction;a second scanning unit configured to deflect the second laser beam along a desired direction; anda control unit coupled to the first and second scanning units and arranged to output control signals to the first and second scanning units to manufacture an object.2. The multi-beam laser scanning system of claim 1 , further comprising a reflective mirror configured to reflect the second laser beam before the second laser beam is deflected by the second scanning unit.3. The multi-beam laser scanning system of claim 2 , wherein the reflective mirror reflects the second laser beam to position the first and second laser beams substantially parallel to each other.4. The multi-beam laser scanning system of claim 1 , wherein the first and second laser beams have substantially the same laser power and beam quality.5. The multi-beam laser scanning system of claim 1 , wherein the object is a grid-shaped collimator.6. A multi-beam laser scanning system claim 1 , comprising:a laser configured to generate an ...

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS

An optical scanning device includes a light source, a beam detector that takes a main scanning start time of a light beam emitted from the light source and deflection-scanned in a predetermined main scanning direction by a deflection-scanning component, and a housing with a support portion that supports reflecting mirrors in different arrangement positions so arrangement angles are different from each other. The support portion includes a first support portion that supports a first side surface of the reflecting mirror in a plurality of arrangement positions. A second support portion supports the first side surface of the mirror with the first support portion, causing a first arrangement angle in the first arrangement position of the reflecting mirror. A third support portion supports the first side surface of the reflecting mirror with the first support portion, causing a second arrangement angle in a second arrangement position of the reflecting mirror. 1. An optical scanning device comprising:a light source,a beam detector that takes a main scanning start time of a light beam emitted from the light source and deflection-scanned in a predetermined main scanning direction by a deflection-scanning component, anda housing provided with a support portion that supports a reflecting mirror reflecting the light beam in a plurality of different arrangement positions so arrangement angles are different from each other,wherein the support portion includes:a first support portion that commonly supports a first side surface in a thickness direction of the reflecting mirror in the plurality of arrangement positions;a second support portion that supports the first side surface of the reflecting mirror together with the first support portion, causing a first arrangement angle in a first arrangement position of the reflecting mirror; anda third support portion that supports the first side surface of the reflecting mirror together with the first support portion, causing a second ...

Optical Scanning Apparatus

An optical scanning apparatus includes first and second light sources configured to emit first and second light fluxes respectively, a deflector having a reflecting surface which reflects the first and second light fluxes, and configured to deflect the first and second light fluxes in a main scanning direction, and an imaging lens configured to let the first and second light fluxes through and form an image of the first and second light fluxes on the reflecting surface of the deflector. The imaging lens has a first incident surface into which the first light flux enters at a right angle, a second incident surface into which the second light flux enters at a right angle, a first outgoing surface from which the first light flux exits, and a second outgoing surface which makes an angle with the first outgoing surface and from which the second light flux exits.

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS

The present invention relates to an optical scanning device and an image forming apparatus. In order to suppress jitter, the degree of convergence of a first incident optical system and the degree of convergence of a second incident optical system are both equal to or greater than 0, and the degree of convergence of the second incident optical system is greater than the degree of convergence of the first incident optical system. An angle of incidence, within a sub-scanning section, of a light beam incident on a deflection surface of an optical deflector from the second incident optical system is less than an angle of incidence, within the sub-scanning section, of a light beam incident on the deflection surface of the optical deflector from the first incident optical system. 1. An optical scanning device , comprising:a first light source;a first incident optical system provided so as to correspond to a first light beam emitted by the first light source;a second light source;a second incident optical system provided so as to correspond to a second light beam emitted by the second light source;an optical deflector disposed such that the first light beam from the first incident optical system and the second light beam from the second incident optical system are incident on the optical deflector;a first imaging optical system configured to image the first light beam deflected by the optical deflector on a first surface to be scanned; anda second imaging optical system configured to image the second light beam deflected by the optical deflector on a second surface to be scanned,wherein, when a degree of convergence is expressed as {1−(Sk÷f)}, in which Sk represents distance, within a main scanning section, from a rear principal plane of the first or second imaging optical system to the corresponding first or second surface to be scanned, and f represents focal length of the first or second imaging optical system within the main scanning section,the degree of convergence ...

READING MODULE AND IMAGE READING DEVICE AND IMAGE FORMING APPARATUS THEREWITH

A reading module has a light source, an optical system imaging, as image light, reflected light of light radiated from the light source to a document, a sensor where a plurality of imaging regions for converting the image light imaged by the optical system into an electrical signal are arranged next to each other in the main scanning direction, and a housing the light source, the optical system, and the sensor. The optical system has a mirror array where a plurality of reflection mirrors whose reflection surfaces are aspherical concave surfaces are coupled together in an array in the main scanning direction, and an aperture stop portion adjusting the amount of the image light reflected from the reflection mirror. The amount of the image light striking the reflection mirror is increasingly small from opposite end parts of the reflection mirror toward its central part in the main scanning direction. 1. A reading module comprising:a light source which radiates light to a document;an optical system which images, as image light, reflected light of the light radiated from the light source to the document; anda sensor in which a plurality of imaging regions for converting the image light imaged by the optical system into an electrical signal are arranged next to each other in a main scanning direction, wherein a mirror array in which a plurality of reflection mirrors whose reflection surfaces are aspherical concave surfaces are coupled together in an array in the main scanning direction; and', 'a plurality of aperture stop portions each provided in an optical path of the image light between a reflection mirror and an imaging region of the sensor, the plurality of aperture stop portions adjusting an amount of the image light reflected from the reflection mirror, and, 'the optical system comprisesan amount of the image light that strikes the reflection mirror is increasingly small from opposite end parts of the reflection mirror toward a central part thereof in the main ...

IMAGE FORMING APPARATUS

An image forming apparatus, including: an image signal generating portion configured to generate an image signal as bit data obtained by splitting image data by a predetermined integer value for each pixel; a first storage portion configured to store a profile indicating magnification correction data for each of a plurality of regions in a main scanning direction; and a second storage portion configured to store a partial magnification granularity being a size of a processing unit used for splitting a partial magnification correction start value, wherein the image signal generating portion calculates a split region boundary address indicating a main scanning position at which a scanning region on the surface of a photosensitive member to be scanned by a light beam is split in the main scanning direction for each partial magnification granularity based on the partial magnification correction start value extracted from the profile and the partial magnification granularity. 1. An image forming apparatus , which is configured to form an image on a recording medium , comprising:an image signal generating portion configured to generate an image signal as bit data obtained by splitting image data by a predetermined integer value for each pixel;a light source configured to emit a light beam based on the image signal;a deflection device configured to deflect the light beam emitted from the light source so that the light beam scans a surface of a photosensitive member in a main scanning direction;a lens configured to image the light beam deflected by the deflection device on the surface of the photosensitive member;a first storage portion configured to store a profile indicating magnification correction data for each of a plurality of regions in the main scanning direction; anda second storage portion configured to store a partial magnification granularity being a size of a processing unit used for splitting a partial magnification correction start value,wherein the image ...

LASER ASSEMBLY FOR A LASER PRINTER

An example laser assembly for a laser printer may include a plurality of lasers to emit respective photons; a prism to redirect the respective laser beams emitted from the plurality of lasers toward a collimator lens of the laser printer to generate a photon beam; and one or more processors to: determine a timing schedule for individually activating the plurality of lasers based on a resolution setting of the laser printer, and when printing at a resolution corresponding to the resolution setting, control activation of each of the plurality of lasers to emit the respective photons according to the timing schedule to form the photon beam. 1. A method comprising:determining, by a device, a timing schedule for activating each laser of a set of lasers to print at a particular resolution;identifying, by the device, a threshold amount of power that is based on an amount of power needed to energize a junction of a laser, of the set of lasers, to emit photons; andactivating, by the device and based on determining the timing schedule, the set of lasers by applying the threshold amount of power to the set of lasers.2. The method of claim 1 , where the device is a laser printer.3. The method of claim 1 , where the threshold amount of power is less than or equal to an amount of power needed to cause the laser to generate a laser beam.4. The method of claim 1 , further comprising:identifying a resolution setting, of the device, that indicates the particular resolution at which the device is to print.5. The method of claim 4 , further comprising:identifying a characteristic of an image that is to be printed,where identifying the resolution setting comprises:identifying the resolution setting based on identifying the characteristic of the image.6. The method of claim 1 , further comprising:determining the set of lasers, from a plurality lasers, based on the particular resolution.7. The method of claim 1 ,where the device includes a laser assembly with a particular quantify of ...

IMAGE FORMING APPARATUS

Provided is an image forming apparatus configured to acquire a density of a test print image at each position in the main scanning direction, which is read by the image reading unit after a first test print image is formed, to correct a setting value of an exposure amount of an exposure device to a first light amount, which is higher than a reference light amount that is an exposure amount when the first test print image is formed, in an area where the acquired density is lower than a target density, to correct the exposure amount of the exposure device to a second light amount, which is lower than the reference light amount, in an area where the acquired density is higher than the target density, and to form a second test print image. On the basis of the second test print image, density correction is performed. 2. The image forming apparatus of claim 1 , wherein the first light amount and the second light amount are prescribed constant values.3. The image forming apparatus of claim 1 , wherein the first light amount is set to increase as the density of the first test print image decreases at each position in the main scanning direction claim 1 , andthe second light amount is set to decrease at each position in the main scanning direction as the density of the first test print image increases at each position in the main scanning direction. The present invention relates to an image forming apparatus.In general, in an electrophotographic image forming apparatus, an exposure device exposes a surface of a photoreceptor to form an electrostatic latent image, a developing device develops the formed electrostatic latent image to form a toner image, and the formed toner image is transferred to a recording medium, so that an image is formed.In the photoreceptor on which the electrostatic latent image is formed, irregularity of charging characteristics or sensitivity characteristics exists in an axial direction of a drum surface due to factors on manufacturing. Furthermore, ...

Optical-Scanning-Height Measuring Device

To provide an optical-scanning-height measuring device capable of quickly and highly accurately measuring the height of the surface of a measurement object while being compactly configured. In order to obtain interference light appropriate for calculation of height, an optical path length of the reference light is adjusted in the reference section Movable sections a and b supported by a supporting section move on linearly extending two linear guides g, whereby the optical path length of the reference light changes. When the optical path length of the reference light is adjusted, the movable sections a and b are moved in opposite directions each other. 1. An optical-scanning-height measuring device comprising:a position-information receiver configured to receive designation of a measurement point;a light emitter configured to emit temporally low-coherent light;a light splitter configured to divide the light emitted from the light emitter and output a part of the divided light as measurement light and output another part of the divided light as reference light;a light deflector configured to deflect the measurement light output from the light splitter and irradiate the measurement light on a measurement object;a driving controller configured to control the light deflector to irradiate light on a portion of the measurement object corresponding to the measurement point received by the position-information receiver;a deflection detector configured to detect a deflecting direction of the light deflector or an irradiation position of the measurement light deflected by the light deflector;a reference body configured to reflect the reference light output from the light splitter to return to the light splitter;a movable stage configured to move the reference body along a first movement axis to change an optical path length of the reference light leading from the light splitter to the reference body;a supporting member configured to movably support the movable stage on the ...

Optical-Scanning-Height Measuring Device

To provide an optical-scanning-height measuring device capable of efficiently measuring a shape of a desired portion of a measurement object. Designation of a measurement point on an image of a measurement object S is received. Light emitted from a light emitting section is deflected by the deflecting section and irradiated on the measurement object S. The deflecting section is controlled to irradiate the light on a portion of the measurement object S corresponding to the measurement point. A deflecting direction of the deflecting section or an irradiation position of the light deflected by the deflecting section is detected. Height of the portion of the measurement object S corresponding to the measurement point is calculated on the basis of the deflecting direction of the deflecting section or the irradiation position of the light deflected by the deflecting section and the light reception signal output by the light receiving section. 1. An optical-scanning-height measuring device comprising:a camera configured to acquire an image of a measurement object;a position-information receiver configured to receive designation of a measurement point on the image of the measurement object acquired by the camera;a light emitter configured to emit light;a light deflector configured to deflect the light emitted from the light emitter and irradiate the light on the measurement object;a light receiver configured to receive the light from the measurement object and output a light reception signal indicating a received light amount;a driving controller configured to control the light deflector to irradiate the light on a portion of the measurement object corresponding to the measurement point;a deflection detector configured to detect a deflecting direction of the light deflector or an irradiation position of the light deflected by the light deflector; anda height calculator configured to calculate height of the portion of the measurement object corresponding to the measurement ...

OBJECT DETECTION DEVICE AND SENSING APPARATUS

An object detection device includes: a light projection unit that includes a light source having a plurality of light emitting units that are arranged along at least one direction; a light scanning unit that scans light emitted from the light projection unit along the one direction; a light receiving unit that receives light emitted from the light scanning unit and reflected on an object; and a control unit that determines a light emitting unit to be turned on among the light emitting units, according to a direction of travel of light scanned by the light scanning unit. 1. An object detection device comprising:a light projection unit that includes a light source having a plurality of light emitting units that are arranged along at least one direction;a light scanning unit that scans light emitted from the light projection unit along the one direction;a light receiving unit that receives light emitted from the light scanning unit and reflected on an object; anda control unit that determines a light emitting unit to be turned on among the light emitting units, according to a direction of travel of light scanned by the light scanning unit.2. The object detection device according to claim 1 , whereinwhen light emitted from the light scanning unit travels toward an end of a scanning range of the light scanning unit, the control unit controls number of light emitting units to be turned on among the light emitting units to be less than that when light emitted from the light scanning unit travels toward a central part of the scanning range.3. The object detection device according to claim 2 , whereinthe light scanning unit scans from one end of the scanning range toward the other end thereof, andthe control unit increases the number of light emitting units to be turned on among the light emitting units when light emitted from the light scanning unit scans from one end of the scanning range to the central part thereof, and decreases the number of light emitting units to be ...

DRAWING APPARATUS AND DRAWING METHOD

A drawing apparatus includes a laser light source unit configured to output laser light; a scanning mirror unit configured to reflect and scan the laser light; a drawing control unit configured to control an output value of the laser light of the laser light source unit based on display image data so that a display image is drawn by the laser light in a range scanned by the scanning mirror unit; and an output adjustment control unit configured to control the laser light source unit so that characteristic detection laser light for adjusting the output value of the laser light is output outside a range in which the display image is drawn inside the range scanned by the scanning mirror unit. The output adjustment control unit controls the characteristic detection laser light to be intermittently output in one frame period. 1. A drawing apparatus comprising:a laser light source unit configured to output laser light;a scanning mirror unit configured to reflect and scan the laser light;a drawing control unit configured to control an output value of the laser light of the laser light source unit based on display image data so that a display image is drawn by the laser light in a range scanned by the scanning mirror unit; andan output adjustment control unit configured to control the laser light source unit so that characteristic detection laser light for adjusting the output value is output outside a range in which the display image is drawn inside the range scanned by the scanning mirror unit, wherein the output adjustment control unit controls the characteristic detection laser light to be intermittently output in one frame period in such a way that timings at which the characteristic detection laser light is output will not overlap between frames in a predetermined number of continuous frames.2. The drawing apparatus according to claim 1 , wherein the output adjustment control unit controls the characteristic detection laser light to be output and stopped from being ...

OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS EQUIPPED WITH SCANNING APPARATUS

An optical scanning apparatus includes, a deflection unit configured to deflect first and second light fluxes in a main scanning direction by a same deflection surface, an incident optical system configured to cause the first and second light fluxes to enter the deflection surface, and an imaging optical system configured to converge the first and second light fluxes deflected by the deflection unit to first and second surfaces to be scanned, respectively. The imaging optical system includes first imaging optical element having an output surface including first and second curves that the first and second light fluxes respectively enter, and among light rays included in the first and second light fluxes, the light rays that are reflected by the first and second curves, intersect each other in a sub-scanning cross section perpendicular to the main scanning direction. 1. An optical scanning apparatus comprising:a deflection unit configured to deflect first and second light fluxes in a main scanning direction by a same deflection surface;an incident optical system configured to cause the first and second light fluxes to enter the deflection surface; andan imaging optical system configured to converge the first and second light fluxes deflected by the deflection unit to first and second surfaces to be scanned, respectively,wherein the imaging optical system includes a first imaging optical element having an output surface including first and second curves that the first and second light fluxes respectively enter, andwherein among light rays included in the first and second light fluxes, the light rays that are reflected by the first and second curves intersect each other in a sub-scanning cross section perpendicular to the main scanning direction.2. The optical scanning apparatus according to claim 1 , wherein each of the first and second curves has a shape concave toward the deflection unit in the sub-scanning cross section.3. The optical scanning apparatus according to ...

OPTICAL SCANNING DEVICE AND IMAGE FORMING DEVICE

An optical scanning device including: a light source; a deflector that deflects light from the light source; an optical element that guides light deflected by the deflector on an optical path to a photosensor; and a housing that accommodates the deflector and the optical element. The housing is integrally formed and includes a bottom plate, a side wall standing upright from a periphery of a main surface of the bottom plate, and a pair of ribs parallel with each other and standing upright from the bottom plate. Both longitudinal ends of each of the ribs in plan view are joined to the side wall. A region of the bottom plate between the ribs in the plan view has a portion displaced farther upward in an upright direction of the side wall than other regions of the bottom plate. 1. An optical scanning device comprising:a light source;a deflector that deflects light from the light source;an optical element that guides light deflected by the deflector on an optical path to a photosensor; anda housing that accommodates the deflector and the optical element,wherein a bottom plate;', 'a side wall standing upright from a periphery of a main surface of the bottom plate; and', 'a pair of ribs parallel with each other and standing upright from the bottom plate,, 'the housing is integrally formed and comprisesboth longitudinal ends of each of the ribs in plan view are joined to the side wall, anda region of the bottom plate between the ribs in the plan view has a portion displaced farther upward in an upright direction of the side wall than other regions of the bottom plate.2. The optical scanning device of claim 1 , wherein the portion is equal to an entirety of the region of the bottom plate between the ribs.3. The optical scanning device of claim 1 , whereinthe portion is smaller than an entirety of the region of the bottom plate between the ribs, andthe deflector is supported by the portion.4. The optical scanning device of claim 1 , whereinthe bottom plate has a first main ...

LIGHT SCANNING DEVICE AND IMAGE FORMING APPARATUS WITH THE SAME

A light scanning device includes: a first semiconductor laser that emits a light beam L; a polygonal mirror that deflects the light beam L; a reflective mirror that reflects the light beam L deflected by the polygonal mirror and causes the light beam L to enter a photosensitive drum ; and a BD sensor that detects the light beam L deflected by the polygonal mirror . The light scanning device scans the photosensitive drum with the light beam L and set scanning timing of the photosensitive drum using the light beam L based on detection timing of the light beam L using the BD sensor . The BD sensor is arranged in the position farther from the polygonal mirror than the last reflective mirror that reflects the light beam L immediately before entering the photosensitive drum and arranged inside a scanning angle range α of the light beam L corresponding to an effective scan area of the photosensitive drum 1. A light scanning device , comprising:a light-emitting element;a deflecting section configured to deflect a light beam emitted from the light-emitting element;at least one reflective mirror configured to reflect the light beam and cause the light beam to enter a scan object, the light beam being emitted from the light-emitting element and deflected by the deflecting section; andan optical sensor configured to detect the light beam deflected by the deflecting section, whereinthe light scanning device is configured to scan the scan object with the light beam and set scanning timing of the scan object using the light beam based on detection timing of the light beam using the optical sensor, andthe optical sensor is arranged in a position farther from the deflecting section than a last reflective mirror that reflects the light beam immediately before entering the scan object and arranged inside a scanning angle range of the light beam corresponding to an effective scan area of the scan object.2. The light scanning device according to claim 1 , whereinthe last reflective ...

OPTICAL SCANNER AND IMAGE FORMING APPARATUS

A first mirror and a second mirror are disposed on a mounting surface of a housing in an exposure device of an image forming apparatus. A back surface of the first mirror is supported by ribs and the first mirror is pressed against the ribs by elastically pressing a reflecting surface thereof by a spring member. A reflecting surface of the second mirror is supported by ribs and the second mirror is pressed against the ribs by elastically pressing a back surface thereof by a spring member. 1. An optical scanner , comprising:a housing that is formed of thermoplastic resin and has a mounting surface;a first mirror that is mounted on the mounting surface and has a first reflecting surface which reflects a light beam and a first back surface which is opposite to the first reflecting surface;a second mirror that is mounted on the mounting surface and has a second reflecting surface which reflects the light beam reflected by the first reflecting surface and a second back surface which is opposite to the second reflecting surface;a first supporting member that is, on the mounting surface, integrally formed with the mounting surface and that supports the first mirror on the mounting surface by supporting a part of the first back surface;a second supporting member that is, on the mounting surface, integrally formed with the mounting surface and that supports the second mirror on the mounting surface by supporting a part of the second reflecting surface of the second mirror;a first elastic member that elastically presses the first reflecting surface to press the first mirror against the first supporting member; anda second elastic member that elastically presses the second back surface to press the second mirror against the second supporting member.2. The optical scanner according to claim 1 , whereinthe first supporting member includes two ribs that are formed integrally with the mounting surface with an interval between the two ribs in a width direction of the first mirror ...

LIGHT SCANNING DEVICE AND IMAGE FORMING APPARATUS WITH THE SAME

Respective first semiconductor lasers and and respective second semiconductor lasers and are arranged on a drive substrate (YZ plane) such that the emission directions of light beams L to L of the respective first semiconductor lasers and and the respective second semiconductor lasers and are perpendicular to the YZ plane. On the YZ plane, the respective first semiconductor lasers and and the respective second semiconductor lasers and are divided to two mutually different lines y and y in the lateral direction perpendicular to the rotation axis of a polygonal mirror , and the respective first semiconductor lasers and and the respective second semiconductor lasers and are arranged on respective different lines z to z in the vertical direction as the rotation axis direction of the polygonal mirror 1. A light scanning device , comprising:a plurality of first light-emitting elements and a plurality of second light-emitting elements;a deflecting section configured to deflect respective light beams emitted from the respective first light-emitting elements and the respective second light-emitting elements;a first image-forming optical system configured to guide the respective light beams emitted from the respective first light-emitting element and deflected by the deflecting section, to respective scan objects; anda second image-forming optical system configured to guide the respective light beams emitted from the respective second light-emitting elements and deflected by the deflecting section, to respective scan objects, whereinthe respective first light-emitting elements and the first image-forming optical system, and the respective second light-emitting elements and the second image-forming optical system are divided to both sides of a straight line passing through a rotation axis of the deflecting section, a first incident optical system configured to guide the light beams of the respective first light-emitting elements to a first incident spot of the deflecting ...

LIGHT SCANNING APPARATUS AND IMAGE FORMING APPARATUS

An apparatus including: a deflector deflecting a light flux from a light source to scan a surface in a main scanning direction; and an imaging optical system including first and second optical elements, and guiding the light flux deflected by the deflector to the surface. When sagittal shapes of an incident surface and an exit surface of each of the first and second optical elements are represented by the following equations:

MULTI-DIRECTIONAL BAR CODE SCANNING DEVICE HAVING MULTIPLE LASER EMITTERS MATCHED WITH SINGLE PHOTOSENSITIVE RECEIVER

A multi-directional bar code scanning device having multiple laser emitters matched with a single photosensitive receiver is disclosed. Multiple paths of laser beams generated by N laser emitters are projected towards a rotatable reflector group via a light projection reflector, and the rotatable reflector group projects the laser beams towards tilted reflector groups, such that multiple paths of laser scanning beams are generated and projected towards a bar code. A beam scatter by the bar code is reflected reversely towards a light collection reflector and focused on a single photosensitive receiver. The device can increase the number of scanning beams and the scanning directions, thereby expanding the scope of depth of field, and preventing the issues which multiple photosensitive receiver cannot operate simultaneously when a single channel is utilized and preventing non-coaxial optical signal crosstalk, thus improving decoding speed, and lowering the cost of the device. 1. A multi-directional bar code scanning device having multiple laser emitters matched with a single photosensitive receiver , comprising:a housing, with a recess formed on a middle of the housing, a light source groove and a light projection reflector support being provided at a side of the housing, and a light collection rectangular aperture formed on a bottom of the recess;N laser emitters, fixed in the light source groove via an installation component and adapted for emitting N laser beams and projecting the N laser beams at a certain projected path, therein N is an integer and N≥2;N light projection reflectors, located above the light source groove and mounted on the light projection reflector support to match with the N laser emitters correspondingly;a light collection reflector, located at a front of the N light projection reflectors, with N light projection apertures being formed on a middle of the light collection reflector to match with the N light projection reflectors correspondingly;a ...

IMAGE-FORMING APPARATUS

An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases. 1. An image forming apparatus including a photosensitive member , and a light-irradiation unit configured to form a latent image on the photosensitive member by scanning , with laser light , a plurality of sections in a main scanning direction at a non-constant scanning velocity , the image forming apparatus comprising:an image data changing unit configured to extract a pixel piece smaller in size than one pixel from image data or insert the pixel piece into the image data according to which of the sections in the main scanning direction data corresponds to among image data for scanning with the laser light; anda brightness changing unit configured to change an emission brightness of the laser light according to which of the sections in the main scanning direction the laser light corresponds to,wherein, in a first section in the main scanning direction, the image data changing unit changes a number of pixel pieces corresponding to the first section to a first number and the brightness changing unit changes an emission brightness of laser light corresponding to the first section ...

LIGHT SCANNING APPARATUS AND IMAGE FORMING APPARATUS

Light scanning apparatus includes a first imaging optical system including one or more imaging optical elements (IOEs) and a first reflective element on optical path between deflecting unit and a first one of IOEs having greatest power in sub-scanning section, and a second imaging optical system including one or more IOEs and a second reflective element on optical path between second scanned surface and a second one of IOEs having greatest power in sub-scanning section. A straight line passing through first and second light-condensing positions of first and second light fluxes deflected by deflecting unit on first and second optical axes is not perpendicular to sub-scanning direction. Distances on first and second optical axes from first and second axial deflecting points to first and second IOEs, and distances on first and second optical axes from first and second axial deflecting points to first and second scanned surfaces are appropriately set. 1. A light scanning apparatus , comprising:a deflecting unit including first and second deflecting surfaces configured to deflect first and second light fluxes to scan first and second scanned surfaces in a main scanning direction; andfirst and second imaging optical systems configured to condense the first and second light fluxes deflected by the deflecting unit on the first and second scanned surfaces, whereinthe first imaging optical system includes one or more imaging optical elements and a first reflective element arranged on an optical path between a first imaging optical element and the deflecting unit, the first imaging optical element having the greatest refractive power in a sub-scanning section out of the one or more imaging optical elements,the second imaging optical system includes one or more imaging optical elements and a second reflective element arranged on an optical path between a second imaging optical element and the second scanned surface, the second imaging optical element having the greatest ...

OPTICAL DEFLECTOR, OPTICAL SCANNING APPARATUS, AND IMAGE FORMING APPARATUS

An optical deflector including a rotary member supported by a bearing shaft and rotatively driven by a motor for deflecting a plurality of laser beams separated from each other in a rotational axis direction of the rotary member is disclosed. The optical deflector includes a polygon mirror having four sides arranged about the rotational axis direction. Each of the four sides is a continuous plane having a plurality of effective reflection areas separated from each other in the rotational axis direction. 1. (canceled)2. An optical deflector for deflecting a plurality of laser beams separated from each other in a rotational axis direction of the optical deflector , the optical deflector comprising:a polygon mirror having multiple reflection surfaces arranged about the rotational axis direction;each of the multiple reflection surfaces is a plane of continuous material having a plurality of effective reflection areas separated from each other in the rotational axis direction by a non-reflective region;the plurality of laser beams incident on the polygon mirror are parallel, and the plurality of laser beams are perpendicular to a rotational axis of the polygon mirror;each of the multiple reflection surfaces includes a first effective reflection area, a second effective reflection area, and a middle area, the middle area including the non-reflective region which does not deflect any of the plurality of laser beams; anda distance, in which the first effective reflection area and the second effective reflection area are separated, is substantially equivalent to a distance between an upper laser beam and a lower laser beam of the plurality of laser beams.3. The optical deflector according to claim 2 , wherein the multiple reflection surfaces include four sides.4. The optical deflector as claimed in claim 2 , wherein the polygon mirror is formed of a material having a Young's modulus in a range of 60 to 220 GPa.5. The optical deflector as claimed in claim 2 , wherein the ...

IMAGE FORMING APPARATUS AND CONTROL METHOD OF IMAGE FORMING APPARATUS

An image forming apparatus includes first and second light sensors positioned in a laser scanning system of at least one color, such that scanned light is detected by the first light sensor and then by the second light sensor and light sensing surfaces of the first and second light sensors are not parallel, and a control unit connected to the first and second light sensors and configured to determine a time difference in the timing of light detection by the first and second light sensors and to execute a color position shift operation upon determining that the time difference is greater than a first threshold value. 1. An image forming apparatus comprising:first and second light sensors positioned in a laser scanning system of at least one color, such that scanned light is detected by the first light sensor and then by the second light sensor and light sensing surfaces of the first and second light sensors are not parallel; anda control unit connected to the first and second light sensors and configured to determine a time difference in the timing of light detection by the first and second light sensors and to execute a color position shift operation upon determining that the time difference is greater than a first threshold value.2. The apparatus according to claim 1 ,wherein the at least one color is a black color.3. The apparatus according to claim 1 , further comprising:a plurality of laser scanning systems of different colors arranged in a sheet transport direction, and the laser scanning system of the at least one color is the last laser scanning system in the sheet transport direction.4. The apparatus according to claim 1 , further comprising:a plurality of laser scanning systems of different colors arranged in a sheet transport direction, and the laser scanning system of the at least one color include the first and last laser scanning systems in the sheet transport direction.5. The apparatus according to claim 1 ,wherein the control unit is configured to ...

OPTICAL SCANNING METHOD AND OPTICAL SCANNING APPARATUS

This optical scanning method yields a high quality image regardless of the size of the scanning area. An emission end of an optical fiber is displaced two-dimensionally to scan light emitted from the optical fiber, the emission end being displaced by an optical scanning actuator that includes a first driver and a second driver for driving the emission end in different directions. A non-circular scanning area is scanned by controlling, with a driver controller, a first drive signal supplied to the first driver and a second drive signal supplied to the second driver so as to rotate a scanning pattern of the light, while causing the scanning pattern to reciprocate repeatedly in a nearly parallel manner, and to change a length of the scanning pattern in accordance with a rotation angle of the scanning pattern. 1. An optical scanning method for displacing an emission end of an optical fiber two-dimensionally to scan light emitted from the optical fiber , the emission end being displaced by an optical scanning actuator that includes a first driver and a second driver configured to drive the emission end in different directions , the optical scanning method comprising:scanning a non-circular scanning area by controlling, with a driver controller, a first drive signal supplied to the first driver and a second drive signal supplied to the second driver so as to rotate a scanning pattern of the light, while causing the scanning pattern to reciprocate repeatedly in a nearly parallel manner, and to change a length of the scanning pattern in accordance with a rotation angle of the scanning pattern.2. The optical scanning method of claim 1 , wherein the drive controller controls the first drive signal and the second drive signal to make the scanning area rectangular.3. The optical scanning method of claim 1 , wherein the drive controller controls the first drive signal and the second drive signal to make the scanning area elliptical.4. The optical scanning method of claim 1 , ...

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS

An optical scanning device includes plural light sources, a light deflector including a deflecting-reflecting surface, and a scanning optical system including plural folding mirrors and plural scanning lenses, wherein the plural scanning lenses have the same shape, at least one of an optical surface at the incidence side and an optical surface at the emission side has an asymmetric shape with respect to a sub-scanning direction, and has an asymmetric shape in the sub-scanning direction with respect to the main scanning direction, and a difference in a number of folding mirrors disposed between the corresponding scanning lens and the light deflector between light incident on the light deflector from a direction inclined to one side relative to a virtual surface including a normal line of the deflecting-reflecting surface and light incident on the light deflector from a direction inclined to the other side is an odd number. 1. An optical scanning device that individually scans a plurality of surfaces to be scanned with a plurality of lights in a main scanning direction , the optical scanning device comprising:a plurality of light sources, each of which corresponds to each of the plurality of surfaces to be scanned;a light deflector which includes at least one deflecting-reflecting surface, and on which a plurality of lights emitted from the plurality of light sources is incident from a direction inclined relative to a virtual plane that includes a normal line of the deflecting-reflecting surface and is orthogonal to the deflecting-reflecting surface; anda scanning optical system including a plurality of folding mirrors and a plurality of scanning lenses, each of the plurality of scanning lenses corresponding to each of the plurality of surfaces to be scanned, the scanning optical system guiding each of the plurality of lights deflected by the light deflector to each of the plurality of surfaces to be scanned, whereinthe plurality of scanning lenses has the same shape, ...

IMAGE FORMING APPARATUS FOR SCANNING LIGHT BEAM AT NON-UNIFORM SCAN SPEED AND EXPOSING PHOTOSENSITIVE MEMBER

An image forming apparatus includes: a halftone processing unit configured to perform halftone processing on image data by a dither matrix that includes a plurality of submatrices and decide an exposure region of an image. In at least one of a first dither matrix corresponding to a first section, and a second dither matrix corresponding to a second section adjacent to the first dither matrix in the main scanning direction and corresponding to a second section different from the first section in tone value, at least a size of an exposure region of an image formed by using a first submatrix corresponding to a predetermined tone value in the dither matrix and a size of an exposure region of an image formed by using a second submatrix corresponding to the predetermined tone value are different. 1. An image forming apparatus comprising:a photosensitive member;an irradiation unit configured to form an electrostatic latent image on the photosensitive member by scanning a laser beam at a non-uniform scan speed with respect to a main scanning direction and exposing the photosensitive member;a correction unit configured to generate second image data by performing correction processing for correcting a tone value of a pixel in first image data in accordance with a position in the main scanning direction; anda halftone processing unit configured to perform halftone processing on the second image data by a dither matrix that includes a plurality of submatrices each including a plurality of pixels and decide an exposure region of an image formed by the irradiation unit,wherein in at least one of a first dither matrix corresponding to a first section, and a second dither matrix corresponding to a second section adjacent to the first dither matrix in the main scanning direction and corresponding to a second section different from the first section in tone value, at least a size of an exposure region of an image formed by using a first submatrix corresponding to a predetermined tone ...

SCANNING DEVICE AND IMAGE FORMING APPARATUS

A CPU is provided which controls a first light emission state in which a light source is controlled to emit a light beam to scan a full-scanning region and a second light emission state in which the light source is controlled to emit a light beam to scan a non-image region in a period from start of activation of a scanning motor to when the number of rotations of the scanning motor reaches a target number of rotations. The CPU acquires BD cycle values of BD signals generated by a main-scanning synchronization sensor, determines a second timing for changing from the first light emission state to the second light emission state on the basis of the two serial BD cycle values, and changes the semiconductor laser from the first light emission state to the second light emission state according to the second timing. 1. A scanning device comprising:a light source configured to emit a light beam;a deflecting unit configured to deflect and scan the light beam emitted from the light source;a driving unit configured to drive the deflecting unit to scan the light beam in a full-scanning region;a generating unit disposed in a second region of the full-scanning region, wherein the second region is excluding a first region on which the light beam based on image data is scanned, and the generating unit is configured to generate a signal in response to reception of the light beam; anda control unit configured to control a first light emission state and a second light emission state in an activation period from start of activation of the driving unit to when the number of rotations of the driving unit reaches a target number of rotations, the control unit controlling the light source to emit light such that the light beam scans the first region and the second region in the first light emission state and controlling the light source to emit light such that the light beam scans the second region,wherein the control unit acquires cycles of the signals generated by the generating unit, ...

LIGHT SOURCE CONTROL DEVICE AND IMAGE FORMING APPARATUS

A light source control device, includes circuitry to: apply a threshold current, a first emission current, and a first correction current to a light source to drive the light source to emit light to form a first pixel, and apply the threshold current, a second emission current, and a second correction current to the light source to drive the light source to emit light to form a second pixel, wherein the circuitry calculates a value of the second correction current by multiplying a value of the first correction current by a ratio of a value of the second emission current to a value of the first emission current, the value of the second emission current being greater than the value of the first emission current. 1. A light source control device , comprising circuitry to:apply a threshold current, a first emission current, and a first correction current to a light source to drive the light source to emit light to form a first pixel, the first correction current correcting the first emission current during application of the first emission current to the light source; andapply the threshold current, a second emission current, and a second correction current to the light source to drive the light source to emit light to form a second pixel, the second correction current correcting the second emission current during application of the second emission current to the light source,wherein the circuitry calculates a value of the second correction current by multiplying a value of the first correction current by a ratio of a value of the second emission current to a value of the first emission current, the value of the second emission current being greater than the value of the first emission current.2. The light source control device according to claim 1 , wherein the value of the first emission current and the value of the first correction current are set based on a feedback signal corresponding to light quantity of the light emitted from the light source.3. The light source ...

Exposure apparatus

In order that an exposure apparatus for producing exposed structures in a photosensitive layer arranged on an object, comprising an object carrier and an exposure device, wherein the object carrier and the exposure device can be moved relative to one another in an advance direction and wherein exposure spots can be produced on the photosensitive layer in a position-controlled manner by means of the exposure device transversely with respect to the advance direction, is improved in such a way that a highest possible exposure power is available, i.e. a largest possible number of exposure spots can be produced per unit time, it is proposed that the exposure device has at least one exposure unit with a series of radiation exit regions which are arranged successively in a series direction and from which exposure beams emerge, by means of each of which, passed through an imaging optical system, an exposure spot can be produced on the photosensitive layer and each of which can be deflected by a deflection unit in a deflection direction running transversely with respect to the series direction, such that each exposure beam can produce exposure spots that at least partly overlap one another in a multiplicity of successive exposure spot positions in the deflection direction.

Image sensing device

An image sensing device includes: a light source, a recording member on which an image is formed and conveyed in one direction, illumination system for causing a light beam emitted from the light source to obliquely illuminate the recording member and, imaging system for condensing specularly reflected light from the image on the recording member and causing the reflected light to travel to a surface of a photodetector, so that the image sensing device obtains positional information of the image on the recording member on the basis of a signal obtained by the photodetector. When the amount of displacement of the recording member in a vertical direction during conveyance of the recording member is d, an angle between the optical axis of the imaging system and a normal to the recording member is θ (degrees), and resolution of the image formed on the recording member is R (dpi), the components are set so that d· tan θ<(25.4/ R )×1000 is satisfied.

Optical apparatus for imaging, has two superposed arrays, each with set of one- dimensional elongated cylindrical optical units consecutively in parallel and spreading along extension-profiling direction

The apparatus has two superposed arrays (320,360) with a set of one- dimensional elongated cylindrical optical units (321-333,361-371) in each of them. The units are consecutively parallel to each other and spread along an extension-profiling direction orthogonal to the longitudinal axes. The superposition spreads an extended layer of optical system with a set of lens units that are arrayed in a two-dimensional matrix.

Beam light scanning apparatus and image forming apparatus

Laser recording device

Light beam scanning device

Method and apparatus for the production of a structure by focused laser radiation on a photosensitively coated substrate

A system for writing geometric structures on a photosensitive substrate including a modulated laser beam source, a focusing lens, a deflector for producing a scanning action between the light source and the lens, and a device for mechanically moving the surface relative to the laser beam. Compressed data for use in writing the geometric structures is read out of a memory into a data delivery circuit such that the data is formatted to have both beam power and position information. A modulator logic circuit operates to call up the data from the data delivery circuit, form a modulation drive signal based on the power information, and delay the modulation drive signal based the position data. The modulator logic circuit thus operates to vary the modulation drive signal to begin or end exposure along the scan lines with greater resolution or pixel density by at least a factor of four more than the resolution or spacing density between adjacent scan lines. The scan lines are arranged within stripes, and adjacent stripes preferably are made to overlap such that the stripes are blended in the overlap according to a predetermined stepwise changing function.

Multiple beam scanning optics

Scanned object transport device

走査線ピツチを変更できる走査光学系

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Apparatus for adjusting a distance between beams of multi-beam laser scanning unit

본 발명은 감광드럼에 결상되는 2개의 레이저광 라인의 화상시작점의 위치가 틀리지 않으면서 레이저광 라인 사이의 간격을 조절할 수 있는 멀티빔 레이저 스캐닝유닛의 부주사 간격 조절장치에 관한 것이다. 이와 같은 목적을 달성하기 위한 멀티빔 레이저 스캐닝유닛의 부주사 간격 조절장치는, 2이상의 레이저 발광원을 사용하여 2이상의 레이저광을 동시에 주사하는 멀티빔 레이저 스캐닝유닛에서 상기 레이저광이 지나가는 방향의 두께가 높이에 따라 다르며, 레이저광의 스캐닝방향으로 경사진 밑면을 갖는 투명부재, 및 투명부재 밑면의 경사와 대응되는 경사면을 갖는 가동부재를 포함하며, 가동부재를 스캐닝방향으로 이동시키면 레이저 발광원에 대한 투명부재의 높이가 변경됨으로써 레이저광 사이의 간격을 조절하는 것을 특징으로 한다. 이때, 투명부재의 상측에는 투명부재를 가압하는 탄성부재가 더 포함되는 것이 바람직하다. 여기서, 투명부재는 상기 레이저광이 지나가는 방향의 단면이 삼각형이나 사다리꼴로 형성되는 것이 바람직하다. 또한, 투명부재는 광학적 굴절율이 1보다 큰 것을 사용하는 것이 바람직하다. The present invention relates to an apparatus for adjusting sub-scan intervals of a multi-beam laser scanning unit capable of adjusting a distance between laser light lines without misaligning the position of the image starting point of two laser light lines formed on a photosensitive drum. The sub-scan interval adjusting device of the multi-beam laser scanning unit for achieving the above object is the thickness of the direction in which the laser light passes in the multi-beam laser scanning unit for simultaneously scanning two or more laser lights using two or more laser light emitting sources. Is different depending on the height, and includes a transparent member having an underside inclined in the scanning direction of the laser light, and a movable member having an inclined surface corresponding to the inclination of the bottom of the transparent member. By changing the height of the transparent member is characterized in that for adjusting the distance between the laser light. At this time, the upper side of the transparent member is preferably further included an elastic member for pressing the transparent member. Here, it is preferable that the transparent member has a cross section in the direction in which the laser light passes in a triangle or trapezoid. In addition, it is preferable to use the transparent member whose optical refractive index is larger than one.

Multi-beam light source unit and, laser scanning unit having the same and method for assembling the laser scanning unit

복수의 레이저 빔간 위치 정렬이 용이하게 이루어짐으로써 조립 작업성 및 생산성을 높일 수 있는 멀티-빔 레이저 스캐닝 유닛을 개시한다. 개시된 본 발명은, 복수의 레이저 빔을 방출하는 레이저 다이오드를 포함하는 다이오드 유닛; 다이오드 유닛을 지지하며 회전 가능한 회전부재; 회전부재를 회전 가능하게 지지하는 고정부재를 포함하며; 회전부재는 복수의 레이저 빔간 위치 정렬을 위하여 선정된 회전각도로 회전되어 고정부재에 고정된 멀티-빔 광원 유닛을 포함한다. 이에 의하면, 멀티-빔 광원 유닛 조립 라인에서 복수의 레이저 빔간 위치 정렬 작업을 한 후, 메인 조립 라인에서 멀티-빔 광원 유닛을 프레임에 간단히 장착하는 것으로 레이저 스캐닝 유닛의 조립을 완료한다. 따라서, 종래와 같은 대형 레이저 빔 위치 정렬지그 등을 메인 조립 라인에 구비할 필요가 없기 때문에, 메인 조립 라인의 구조적인 단순화 및 소형화를 도모할 수 있으며, 레이저 빔간 위치 정렬을 용이하면서도 정확하게 할 수 있다. Disclosed is a multi-beam laser scanning unit capable of easily aligning positions between a plurality of laser beams, thereby increasing assembly workability and productivity. The disclosed invention comprises: a diode unit comprising a laser diode emitting a plurality of laser beams; A rotating member rotatably supporting the diode unit; A fixing member rotatably supporting the rotating member; The rotating member includes a multi-beam light source unit which is rotated at a predetermined rotational angle and fixed to the fixing member for position alignment between the plurality of laser beams. According to this, after the alignment operation between the plurality of laser beams in the multi-beam light source unit assembly line, the assembly of the laser scanning unit is completed by simply mounting the multi-beam light source unit to the frame in the main assembly line. Therefore, since there is no need to provide a large laser beam position alignment jig or the like on the main assembly line as in the prior art, structural simplification and miniaturization of the main assembly line can be achieved, and position alignment between laser beams can be easily and accurately performed. . LSU, 멀티빔광원, 광주사장치, 레이저다이오드, 빔간격조절 LSU, multibeam light source, optical scanning device, laser diode, beam spacing

同期信号発生回路

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

An image forming device

화상 형성 장치는 화상 담지 부재와, 화상 데이타에 의해 상기 화상 담지 부재를 주사하기 위한 주사 수단과, 상기 화상 담지 부재를 구동하기 위한 구동원과, 상기 구동원으로부터 상기 화상 담지 부재로 동력을 전달하기 위한 기어로 구성되고, a ≤ 1.51, 및 b/a 0.752 또는 b/a 1.277를 만족하고, 여기서 a mm는 상기 기어의 기어 피치에 대응되는 화상 담지 부재의 이동 피치이고, b mm는 톤 등급 프린팅을 위한 기본 매트릭스의 피치인 것을 특징으로 한다. The image forming apparatus includes an image bearing member, scanning means for scanning the image bearing member with image data, a driving source for driving the image bearing member, a gear for transmitting power from the driving source to the image bearing member, Wherein a mm is a moving pitch of an image bearing member corresponding to a gear pitch of the gear and b mm is a moving pitch of the image bearing member corresponding to a gear pitch of the gear, And is a pitch of the basic matrix.

Image forming device

Image forming apparatus

Optical scanner

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Optical cascade scanning system for laser printer

The optical cascade scanning system uses two separate laser scanning systems (20A,20B) with respective laser scanning beams. This arrangement provides two scanning lines at the scanned surface, combined to provide a common scanning line. Each scanning system is provided by a non-telecentric system, with the incidence angle of the scanning beam, at the scanned surface, varied with position adjustment of the scanning point. The incidence angle is greater at the contact point of the scanning lines than at each outer end of the common scanning line.

Optical system for high-speed scanning and recording

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Optical scanning system of printing machine

인쇄기의 광주사시스템이 개시된다. 광주사시스템은 순환운동하는 감광벨트의 진행방향에 대해 소정각도로 교차하는 주주사방향을 따라 감광벨트에 대하여 광을 출사하는 광주사유니트와, 감광벨트를 소정거리 벗어난 위치로부터 감광벨트 가장자리를 향하여 광주사유니트로부터 출사된 광을 검출할수 있도록 설치된 제1광검출기와, 주주사방향을 따라 광주사유니트로부터 출사된 광을 제1광검출기보다 먼저 수광할 수 있도록 설치된 제2광검출기와, 제1광검출기와 제2광검출기에서 출력되는 신호를 이용하여 감광벨트상에 설정된 화상기입영역의 선단에서부터 주주사방향을 따라 이미지정보에 대응하는 광이 출사될 수 있도록 광주사유니트를 제어하는 광주사제어부 광주사제어부를 구비한다. 이러한 광주사시스템에 의하면, 라인주사 동기신호가 감광벨트의 궤도이탈에 관계없이 발생됨으로써, 화상기입에로를 줄일 수 있다. An optical scanning system of a printing press is disclosed. The Gwangjusa system is a Gwangju unit for emitting light to the photosensitive belt along the main scanning direction intersecting at a predetermined angle with respect to the traveling direction of the circular photosensitive belt and the photosensitive belt toward the edge of the photosensitive belt from a position away from the predetermined distance. A first photodetector installed to detect light emitted from the unit, a second photodetector installed to receive light emitted from the photoreceptor unit along the main scanning direction before the first photodetector, and a first photodetector And a light control unit for controlling the light scanning unit so that light corresponding to the image information can be emitted along the main scanning direction from the tip of the image writing area set on the photosensitive belt by using the signal output from the second light detector. It is provided. According to this optical scanning system, the line scanning synchronization signal is generated irrespective of deviation of the orbit of the photosensitive belt, thereby reducing the image writing error.

Position detecting apparatus for photosensitive belt in printer

인쇄기의 감광벨트 궤도위치 검출장치를 개시한다. 인쇄기의 감광벨트 궤도위치 검출장치는 적어도 2개의 롤러에 의해 순환운동하는 것으로 그 몸체 일측에 이음부분이 형성된 감광벨트와 상기 감광벨트상에 광을 주사하는 광주사유니트, 현상기, 전사장치 및 상기 광주사유니트, 상기 전사장치 및 상기 현상기의 구동을 제어하는 시스템 제어부를 구비하는 인쇄기에 적용되는 것으로서, 소정위치에서 상기 감광벨트상에 설정된 기준점의 통과를 식별할 수 있도록 상기 이음부분에 소정의 모양으로 형성된 인식패턴;과 전진되는 상기 감광벨트상의 상기 인식패턴을 소정의 위치에서 식별하여 그에 대응하는 전기적 신호를 출력하는 인식패턴 식별센서;를 구비한다. 이러한 인쇄기의 감광벨트 궤도위치 검출장치에 의하면 대량제조되는 감광벨트상의 이음부분내에만 인식패턴이 형성되게 되면 이음부분을 사용하지 않도록 하기 위한 이음부분의 궤도추적제어에 대한 제어오류가 감소된다. Disclosed is a photosensitive belt track position detecting device of a printing press. The photosensitive belt track position detecting device of the printing machine is circulated by at least two rollers, and a photosensitive belt having a joint portion formed on one side of the body, and a photosensitive unit for scanning light on the photosensitive belt, a developing device, a transfer device, and the optical line Applied to a printing machine having a private unit, a system control unit for controlling the driving of the transfer device and the developing device, and having a predetermined shape on the joint portion to identify passage of a reference point set on the photosensitive belt at a predetermined position. And a recognition pattern identification sensor for identifying the recognition pattern on the photosensitive belt to be advanced at a predetermined position and outputting an electrical signal corresponding thereto. According to the photosensitive belt track position detecting device of the printing press, if the recognition pattern is formed only in the joint part on the photosensitive belt manufactured in large quantities, the control error for the track tracking control of the joint part for avoiding the joint part is reduced.

Image forming apparatus and image forming method

Optical scanning device and image forming apparatus using the same

Exposure apparatus and imaging magnification adjustment method

Laser scanning device and scanning lens

Image forming apparatus

Light beam scanning device

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Optical scanner and the image processing system possessing this optical scanner

本发明提供一种光学扫描装置和具备该光学扫描装置的图像形成装置。光学扫描装置包括：光偏转器，使从光源射出的光束偏转；同步检测传感器，基于通过光偏转器沿主扫描方向扫描的光束的检测时机，决定主扫描方向的扫描开始时机；以及传感器前成像光学系统，使被光偏转器反射的光束在同步检测传感器上成像。传感器前成像光学系统当因温度变化造成扫描光学系统的主扫描方向的倍率增大时，使同步检测传感器上的光束的成像位置向光束的检测时机变早的方向移动，并且当主扫描方向的倍率减小时，使同步检测传感器上的光束的成像位置向光束的检测时机变晚的方向移动。

Optical beam scanning device

Scanning type optical printer

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Optical writing apparatus and image forming apparatus

Laser Scanning Unit

본 발명은 단순구조의 마이크로미러 어레이를 이용하여 레이저빔을 감광드럼에 결상시키는 레이저 스캐닝 유니트에 관한 것이다. 본 발명의 목적은 단순구조의 마이크로미러 어레이를 이용하여 레이저빔을 감광드럼에 결상시키는 레이저 스캐닝 유니트를 제공하는데 있다. 이를 위해 본 발명은 비디오신호에 따라 분산광(Diverging Beam)을 출사하는 레이저광원(Laser Source); 상기 분산광을 평행광으로 만들어 주는 콜리메이터렌즈; 상기 평행광을 감광드럼상의 소정의 위치로 반사시키는 다수의 마이크로미러 유니트로 구성된 마이크로미러 어레이; 상기 평행광을 상기 감광드럼상의 소정의 위치로 반사시키기 위해 상기 다수의 마이크로미러 유니트를 제어하는 마이크로미러 어레이 제어부; 인쇄할 화상이미지에 대응하여 상기 다수의 마이크로미러 유니트의 제어 정보와 상기 비디오신호를 발생시키는 비디오신호 제어부; 상기 비디오 신호를 동기시키기 위한 동기신호를 검출하는 동기신호 검출센서를 포함한다. 본 발명에 따른 레이저 프린터 스캐닝 수단은 그 구조 및 동작이 간단하며 f.θ렌즈 및 폴리곤미러와 폴리곤미러 구동용 모터가 필요 없으므로 재료비를 획기적으로 절감할 수 있으며, 고속의 프린터를 쉽게 구현할 수 있는 이점이 있다. 또한 다수열로 구성되는 마이크로미러 어레이를 이용한다면 고해상도의 레이저프린터를 구현하는 것도 가능하다.

Optical multi-beam scanning device and image forming apparatus

本发明提供了光学多光束扫描装置和图像形成装置，在光路合成光学部件的剩余光出射面上的后部位置没有足够空间时，可防止剩余光变成杂散光对光源和其他光学部件造成不良影响。多光束扫描装置有多个偏转后光学单元、光路合成部件和剩余光处理部件。偏转前光学单元赋予光源光束预定特性。在偏转前光学单元赋予光束预定特性后或过程中，光路合成部件使光源光束的光路在水平扫描方向成一直线。剩余光处理部件处理剩余光出射面射出的剩余光，剩余光出射面不是光路合成部件的入射面或出射面。剩余光处理部件有多个不同倾角锥形面的多级锥形结构，吸收面与剩余光出射面平行，吸收从剩余光出射面射出的剩余光，重复局部图案分散剩余光出射面射出的剩余光。

Light-scanning optical system and image-forming apparatus comprising the same

광-주사 광학 시스템은 광원, 제1 광학 시스템, 편향 표면을 갖는 광 편향기, 제2 광학 시스템, 광 검출기, 및 광속 제한 부재를 포함한다. 광원으로부터 방출된 광속은 트리밍되어 제1 광학 시스템에 의해 메인 주사 방향으로 연장되는 선형 광속으로서 이미징된다. 편향기의 편향 표면은 제1 광학 시스템의 이미징 위치 근처에 배치되어, 주사 동작용 선형 광속을 반사하고 편향시킨다. 그런 다음, 편향된 광속은 편향 표면과 주사될 평면 사이에 실질적으로 컨쥬게이트 관계를 설정하는 제2 광학 시스템에 의해 피주사면상에 이미징된다. 한편, 편향된 광속의 일부는 제2 광학 시스템과 피주사면 사이의 광로 중에 배치된 벤딩 미러에 의해 반사되고, 피주사면 상에 주사 시작점을 스폿팅하는 타이밍을 제어하는 기록 시작 위치 동기 신호를 발생시키는 광 검출기에 의해 검출된다. 이에 따라, 벤딩 미러는 광 검출기에 입사하는 입사 광속에 대해 광속 제한 부재로서 동작한다. 광원은 복수개의 광 방출부들을 가질 수 있고, 이 경우, 광 검출기에 의해 검출된 광량은 광원으로부터 방출된 복수개의 광속들 모두에 대해 동일하다.

Timeline generator

FIELD: physics. SUBSTANCE: timeline generator includes: a timeline receiving unit, an internal quantum sequence generator, a divider, a timeline transmission unit, a guard interval shaper, a time selector, a switchable delay line unit, a unit of comparators, generator of linearly changing voltage. EFFECT: improving the accuracy of the timeline synchronization. 5 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 637 872 C1 (51) МПК H03L 7/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2017103954, 07.02.2017 (24) Дата начала отсчета срока действия патента: 07.02.2017 07.12.2017 Приоритет(ы): (22) Дата подачи заявки: 07.02.2017 R U (73) Патентообладатель(и): Федеральное государственное унитарное предприятие "Центральный научно-исследовательский институт связи" (ФГУП ЦНИИС) (RU) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: RU 2381538 C1, 10.02.2010. RU (45) Опубликовано: 07.12.2017 Бюл. № 34 2 6 3 7 8 7 2 R U Стр.: 1 последовательности, делитель, блок передачи шкалы времени, формирователь защитного интервала, временной селектор, блок переключаемых линий задержки, блок компараторов, генератор линейноизменяющегося напряжения. 5 ил., 1 табл. C 1 (54) ГЕНЕРАТОР ШКАЛЫ ВРЕМЕНИ (57) Реферат: Генератор шкалы времени относится к устройствам синхронизации сигналов по частоте, сдвигу фазы и шкале времени. Техническим результатом является повышение точности синхронизации шкалы времени. Генератор шкалы времени содержит: блок приема шкалы времени, внутренний генератор квантовой 163513 U1, 20.07.2016. RU 2439643 C1, 10.01.2012. EP 1447967 A2, 06.02.2004. 2 6 3 7 8 7 2 Адрес для переписки: 111141, Москва, 1-й пр-д Перова поля, 8, ФГУП ЦНИИС C 1 (72) Автор(ы): Мазуренко Дмитрий Константинович (RU) C 1 C 1 2 6 3 7 8 7 2 2 6 3 7 8 7 2 R U R U Стр.: 2 RUSSIAN FEDERATION (19) RU (11) (13) 2 637 872 C1 (51) Int. Cl. H03L 7/00 (2006.01) FEDERAL SERVICE FOR INTELLECTUAL PROPERTY (12) ABSTRACT ...

Optical scanning apparatus and image forming apparatus

Light beam scanning device

Laser scanning unit

레이저스캐닝유닛이 개시된다. 개시된 본 발명에 의한 레이저스캐닝유닛은, 복수의 레이저빔을 발생시키는 광원유닛; 상기 복수의 레이저빔 중 적어도 어느 하나의 레이저빔의 광축 상에 배치된 수평편광기; 상기 복수의 레이저빔 중 나머지 레이저빔의 광축 상에 배치된 수직편광기; 상기 각각의 편광기를 통과하면서 생성된 수평 및 수직편광을 소정 각도 범위 내에서 편향시키는 폴리곤미러; 및 상기 폴리곤미러에 의해 편향된 복수의 편광 중 수평편광은 통과시키고 수직편광은 소정 각도로 반사시키는 광학필터;를 포함하는 것을 특징으로 한다. A laser scanning unit is disclosed. Laser scanning unit according to the present invention, the light source unit for generating a plurality of laser beam; A horizontal polarizer disposed on an optical axis of at least one of the plurality of laser beams; A vertical polarizer disposed on an optical axis of the remaining laser beams of the plurality of laser beams; A polygon mirror configured to deflect the horizontal and vertical polarizations generated while passing through each polarizer within a predetermined angle range; And an optical filter configured to allow horizontal polarization of the plurality of polarizations deflected by the polygon mirror to pass and reflect vertical polarization at a predetermined angle. 레이저스캐닝유닛, 수평·수직편광기, 광학필터, 에프세타렌즈 Laser Scanning Units, Horizontal and Vertical Polarizers, Optical Filters, Ftheta Lenses

Exposure apparatus

In order that an exposure apparatus for producing exposed structures in a photosensitive layer arranged on an object, comprising an object carrier and an exposure device, wherein the object carrier and the exposure device can be moved relative to one another in an advance direction and wherein exposure spots can be produced on the photosensitive layer in a position-controlled manner by means of the exposure device transversely with respect to the advance direction, is improved in such a way that a highest possible exposure power is available, i.e. a largest possible number of exposure spots can be produced per unit time, it is proposed that the exposure device has at least one exposure unit with a series of radiation exit regions which are arranged successively in a series direction and from which exposure beams emerge, by means of each of which, passed through an imaging optical system, an exposure spot can be produced on the photosensitive layer and each of which can be deflected by a deflection unit in a deflection direction running transversely with respect to the series direction, such that each exposure beam can produce exposure spots that at least partly overlap one another in a multiplicity of successive exposure spot positions in the deflection direction.

Exposure apparatus

Exposure apparatus

用于在布置在物体上的感光层中产生曝光结构的曝光设备，包括载物台和曝光装置，其中，载物台和曝光装置在进给方向上可彼此相对运动，并且其中，借助曝光装置可横向于进给方向地在感光层上位置控制地产生曝光光斑，为了如此改进该曝光设备，以使得尽可能高的曝光功率可供使用，也就是说每个单位时间能够产生尽可能大数量的曝光光斑，提出，曝光装置具有至少一个曝光单元，所述曝光单元具有一排在排列方向上相互跟随地布置的辐射出口区域，从所述辐射出口区域射出曝光光束，由这些曝光光束通过将每一个曝光光束引导穿过成像镜头而可以在感光层上产生曝光光斑，并且曝光光束中的每一个都可由偏转单元在横向于排列方向延伸的偏转方向上偏转，从而借助每个曝光光束在偏转方向上在若干相互跟随的曝光光斑位置上可产生彼此至少部分重叠的曝光光斑。

Exposure equipment

Exposure apparatus

An exposure apparatus for producing exposed structures in a photosensitive layer arranged on an object is provided. An object carrier and an exposure device, which can be moved relative to one another in an advance direction, enable exposure spots to be produced on the photosensitive layer in a position-controlled manner. The exposure device has at least one exposure unit with a series of radiation exit regions which are arranged successively in a series direction and from which exposure beams emerge, by means of each of which, passed through an imaging optical system, an exposure spot can be produced on the photosensitive layer and each of which can be deflected by a deflection unit in a deflection direction running transversely to the series direction, such that each exposure beam can produce exposure spots that at least partly overlap one another in a multiplicity of successive positions in the deflection direction.

Exposure apparatus

exposure system

Belichtungsanlage zum Erzeugen belichteter Strukturen (26) in einer auf einem Objekt (22) angeordneten fotosensitiven Schicht (24), umfassend einen das Objekt (22) aufnehmenden Objektträger (14) und eine Belichtungseinrichtung (30), wobei der Objektträger (14) und die Belichtungseinrichtung (30) in einer Vorschubrichtung (16) relativ zueinander bewegbar sind und wobei mit der Belichtungseinrichtung (30) quer zur Vorschubrichtung (16) Belichtungsflecken (42) positionsgesteuert auf der fotosensitiven Schicht (24) erzeugbar sind, dadurch gekennzeichnet, dass die Belichtungseinrichtung (30) mindestens eine Belichtungseinheit (50) mit einer Reihe (52) von in einer Reihenrichtung (53) aufeinanderfolgend angeordneten Strahlungsaustrittsbereichen (54) aufweist, aus denen Belichtungsstrahlen (56) austreten, dass mit jedem der Belichtungsstrahlen (56) durch eine Abbildungsoptik (102) geführt ein Belichtungsfleck (42) auf der fotosensitiven Schicht (24) erzeugbar ist, dass jeder der Belichtungsstrahlen (56) durch eine Ablenkeinheit (64) in einer quer zur Reihenrichtung (53) und schräg zur Vorschubrichtung (16) verlaufenden Ablenkrichtung (68) ablenkbar ist, so dass mit jedem Belichtungsstrahl (60) in der Ablenkrichtung (68) in einer Vielzahl von aufeinanderfolgenden Belichtungsfleckpositionen (90) einander zumindest teilweise überlappende Belichtungsflecken (42) erzeugbar sind und dass die Belichtungsflecken (42) aufeinanderfolgender Belichtungsstrahlen (60) längs zueinander paralleler Ablenkrichtungen (68) bewegbar sind. An exposure apparatus for producing exposed structures (26) in a photosensitive layer (24) disposed on an object (22), comprising a slide (14) receiving the object (22) and an exposure device (30), the slide (14) and the Exposure device (30) in a feed direction (16) are movable relative to each other and wherein the exposure device (30) transversely to the feed direction (16) exposure spots (42) position-controlled on the photosensitive layer (24) can be ...

Optical scanning apparatus

An optical scanning apparatus comprising a plurality of light sources, a polygon mirror for deflecting beams emitted from the light sources in a main scanning direction, lenses for imaging the deflected beams on receiving surfaces and diverting mirrors for directing the beams which passed through the lenses to the receiving surfaces. In one side of the polygon mirror, three diverting mirrors are provided in an upper optical path, and two diverting mirrors are provided in a lower optical path. In the other side of the polygon mirror, one diverting mirror is provided in a lower optical path, and two diverting mirrors are provided in an upper optical path. Thereby, bows on the receiving surfaces have the same curving direction, and color displacement can be inhibited.