DEVICE FOR MARKING WITH MULTIPLE LASERS AND INDIVIDUALLY CUSTOMIZABLE SETS OF DEFLECTING MEANS

Device for marking with multiple lasers

The invention relates to markirovochnomu apparatus (device for marking) according to limiting part of U. 1, intended for marking object by means of laser radiation.

Are known marking device, which are used single laser (for example S0_{2 laser}), emits a beam of radiation, which is fed to markiruemomu object. Object is moved on the conveyor belt relative to marking apparatus. Usually for direction of radiation beam on object in accordance with the applied sign is used scanning device. Since usually is desirable to ensure high productivity of marking objects, speed of object, moving on the conveyor belt relative to marking apparatus, should be high. However arbitrarily to increase this speed because, since scanning device require sufficient period of time, to apply marked on passing before it object. As a result, efficiency of similar marking device is limited quickly effect of scanning devices.

Productivity may be is increased with the help of marking device, which contain group of lasers operating, for example gas, and control unit for individual activation of each of the lasers for laser beam in accordance with applied sign. Such marking device are described in US 5229573 and US 5229574.

To obtain more high rates of marking, required marking device with increased amounts of lasers. However to present time possible quantity of lasers limited to size of individual lasers, leading to inadmissibly large overall device and to difficulties delivering laser beams to markiruemomu object.

In GB 2304641 a system for marking articles by means of laser beams. Many bundles of is directed on segmented mirror, to arranged their in the form of vertical column.

In US 4652722 considered apparatus for engraving of letters on moving articles. Apparatus has a group of lasers, which emit beams, directed on a set of mirrors, which in the initial position mutually coordinated by position.

In US 6421159 Β1 described laser marking apparatus, in which lasers are installed at angle to each other, to reduce distance between emitted by them beams.

In US 5339737 and considered offset printed shape, which are used together with laser apparatus. Laser beams is directed on a template recorded symbols, on outlet from which they acquire required configuration.

In US 5115446 and a bearing structure for flanges and other elements of laser apparatus, which supports laser tube, forming rectangular configuration.

-, -, Consists in development of the marking apparatus, providing especially flexible control of beams of radiation of multiple lasers.

This problem achieves development of marking apparatus with signs, connected in U. 1 of application of the formula.

Preferred embodiments are disclosed in dependent claims, and also in below the following description, containing references to generated by drawings.

According to the invention, the marking apparatus described type characterized in that has set of deflecting means for perestraivaniya laser beams to obtain their desirable configuration. At that set of deflecting means has at least two deflecting agent on each laser beam, in particular at least two are rebuilding mirror or at least one light guide and one lens on each laser beam. Each deflecting agent is made with possibility of individual adjustment provided by them direction of deviation and/or with possibility for individual of displacement.

Use on each beam of radiation at least two deflecting means for individual deviation of each beam can be considered as main ideas of the invention. Such decision means, that each beam of radiation is directed on corresponding deflecting agent, controlled independently from other means such, so that in principle possible to produce any required configuration of beams.

Beams of radiation, emitted lasers, form a certain configuration, for example linear configuration (T. e. line or of) of mutually parallel radiation beams. As requisite advantages of the invention may be mentioned its ability flexibly to rearrange manufactures linear configuration in any other configuration. So, using set of deflecting means can be varied (in particular to reduce) distance between the beams of radiation.

Base concept of the invention consists in using adjustable (tunable) deflecting means, which can be desirable position in process or before beginning functioning of marking apparatus. With this for each deflecting agent can be moved by means of electric motor, controlled control unit.

Advantage of the proposed set of deflecting means in front of prisms is smaller distortion, especially when as deflecting means are used of mirror.

If deflecting agents are mirror, their adjustment (tuning) can be performed by means of individual turns (inclination) and, as a result, change of directions of deflection of beams, T. e. directions, which beams come from mirrors. Additionally or alternatively, mirror may have possibility of displacement. Since by means of mirrors may be readjusted laser beams, mirrors may be considered as perestraivayushchie mirror.

In a context of invention under activating each of lasers for laser beam can understood any process, which determines the, should whether corresponding beam of radiation fall on marked object. Consequently, such activation may be by means of of gate, closes the beam. Other words, laser remains active, and gate controls passing and blocking laser beam.

It is possible to use lasers of any types. Invention especially effective, if critical factor for used lasers is footprint by them space, T. e. if power laser strongly depends on its dimensions. Another advantage of the invention visually appears, if dimensions of laser prevent generation of laser beams, located very close to each other. Invention allows in such cases to reconfiguration laser beams with provision of small distances between them, T. e marking with high resolution.

Examples similar lasers are gas, chemical, fiber and solid-state lasers, as well as lasers on dyes. Can be used also semiconductor lasers or lasers on metal vapors. At usage of gas lasers they may be any of known types, e.g. at- Νe , with, argonovymi , nitrogenous or eksimernymi lasers. Preferably, to gas lasers were S0_{2 lasers}, which are capable to operate in a continuous or impulse mode, for example in control mode q or synchronization of modes.

At sign marking, which should be to form, can understood any sign, for example sound, image or single pixel. Sign may consist of multiple points or lines. Respectively, lasers can be to activate short periods, to form points on object, or for preset time, to form line of definite length.

In a context of- markiruemym object can be any product or article with surface, which can be changed under action of laser radiation. In particular, object may be packaging, for example for food product or drink, fruit or label. Material object can be plastic, paper, metals, ceramics, matter, composites or tissue of organic origin.

Marking may be created by any changes of object surface, for example by change of colour, engraving or cutting.

Further under "desirable configuration laser beams" can understood any configuration of these beams, suitable for the corresponding application. Desirable configurations may correspond to different initial configuration of radiation beams, T. e. configuration, took place to fall of beams on a set of deflecting means. In particular, desirable can be linear configuration, spread relative to initial position of beams.

According to preferred version of the invention, deflecting means is adjusted so, to provide reduced distances between laser beams. Thereby elimination of deficiency, consisting in large distances between beams due to large sizes lasers, and to marking with high resolution. In distinction from special devices for reduction of distance between beams, in which all beams of radiation is directed to common optical element, for example on suitable prism, deflecting means by the invention are characterised by at distorsiei radiation beams.

Reduced distance between beams allows also to produce laser beams, falling on common optical elements closer to their central zone. It may be critical with respect to spherical aberration and other distortions, with place for edge rays, T. e. laser beams, incident on lens or mirror far from central zone, in distinction from paraksialnykh rays, T. e. laser beams, incident on central zone of lens or mirror. So, reduced distances between beams leads to desirable reduction of spherical aberration.

Other preferred variant characterized in that sets of deflecting means, providing two deflecting agent on each laser beam, are made in the form of first and second sets of are rebuilding mirrors, each of which has at least one perestraivayushchee mirror on each laser beam. First set of are rebuilding mirrors directs laser beams on second set are rebuilding mirrors. So, direction of each radiation beam individually is set by means at least two are rebuilding mirrors. Thereby is especially flexible reconfiguration radiation beam.

Deflecting means can be adjusted, in particular be displaced, manually. However preferably, to control unit was is adapted for displacement of deflecting means and/or adjustment of directions of deviation, are provided deflecting means, by means of cardan of suspensions. Conformably to wide circle applications control unit may individually to regulate each deflecting agent. In relatively cost-effective version control unit is able to regulate at least one deflecting agent on each laser beam. Preferably, to propeller suspensions can ensure for installed in them deflecting means at least two or even three rotary degree of freedom.

Adjustment deflecting means by means of control unit makes it possible to set position, corresponding to different values of code. This means, that the direction of laser beams, coming from apparatus, may be varied to change position code, which should be to form on object laser beams. Besides, may also be variation of height of code.

The control unit preferably is adapted for adjustment of deflecting means in the process of marking with the purpose of realization of scanning movement of laser beams. Scanning movements of individual laser beams can be independently one from another, additionally increases flexibility or speed marking.

Is possible also undergo marking. In this case the process of marking object is fixed relative to marking apparatus. Deflecting means are actuated for scanning movement of laser beams so, to print to immobile object all required signs. This variant especially is particularly suitable for uncapping of the two-dimensional graphic information, when there printing of high resolution.

Preferably also adapt the control unit for realization options with multiple pulses. If laser beams are pulse, in one and the same point on the object will be multiple pulses. This mode may be implemented in process of mutual displacement of object and apparatus and at corresponding synchronization of operation of lasers. Alternatively, adjustment of means, deflecting one laser beam, may be varied so, to successive pulses of radiation of one laser accrue in one common point. This mode allows to realize, for example, printing with use of gray scale.

Control unit may be also is adapted for of automatic tuning of deflecting means to changes of object position, for example to compensate influence of vibrations of the object. Change position may transient pickup, for example ultrasonic or optical sensor or pickup near location.

Preferred version of apparatus according to the invention characterized in that in it there is at least one scanning mirror device, containing total mirror, on which are directed all laser beams, outgoing from set of deflecting means, and the control unit is made with possibility for turning mirror scanning device, for example, by means of galvanometricheskogo drive.

Scanning mirror device can be any agent, which provides sequential radiation beam through multiple different spatial positions.

In simple versions of such devices can contain mirror, capable of turning around axis, normal to flat sti falling radiation beam.

Rotary mirror can be mirror drum, T. e. much grannikom , carrying mirror, which together turn around single axis.

Device, containing galvanometricheskii drive, with which is coupled mirror, usually termed galvanometricheskimi scanners. Galvanometricheskii scanner is capable to convert input electric signals in angular position of mirror of this scanner, for example, using movable winding or solid iron rotor. Preferably, to any place, in which should be directed reflected beam of radiation, can be given independently from previous position of this beam. Preferably also, to housed at least two galvanometricheskikh scanner. If galvanometricheskie scanners are installed so, that each laser beam is directed from first galvanometricheskogo scanner at second galvanometricheskii scanner, becomes possible to provide any desirable two-dimensional scanning displacement.

Function mirror scanning device may also be realized by means of acoustic optic devices. In these devices acoustic-optical material is fed acoustic wave. Frequency of acoustic wave determines the angle of deviation of laser beam, passing through acoustic-optical material. Quickly changing frequency of acoustic wave, can be executed fast scanning motion laser beam.

In other preferable version control unit, with the aim of marking object in its motion relative to marking apparatus, is adapted for adjustment deflecting agents and/or at least one mirror scanning device in accordance with information about motion of object. This allows tracking of object. Possibility to accelerate or to decelerate relative displacement apparatus and means, transporting moving object, with provision of desirable possibility to increase productivity of the process of marking.

According to one more preferred version of the invention, a set of deflecting has first and second sets are rebuilding mirrors, each of these sets of comprises at least one perestraivayushchee mirror on each laser beam, and first set of are rebuilding mirrors directs laser beams on second set are rebuilding mirrors. Each of first and second sets of are rebuilding mirrors is configured, as linear set of, and each perestraivayushchee mirror is installed with possibility of turning. In this version the distance between adjacent perestraivayushchimi mirrors of one of the sets of are rebuilding mirrors can be fixed, that used total carrying means, which sets linear configuration are rebuilding mirrors at maintaining possibility of their rotation. Second set are rebuilding mirrors may be is turned relative to flat sti, formed by laser beams, incident on first set of are rebuilding mirrors. May available also positioning device for adjusting position of at least one of the linear sets of are rebuilding mirrors. In particular, positioning agent can moved total carrying means.

Other preferred version of apparatus according to the invention characterized in that control unit is made with possibility of controlling deflecting means for setting degree of approach of or dilution laser beams, outgoing from deflecting means, in particular from second set of deflecting means. This allows regulated deflecting means so, to obtain predetermined pitch laser beams (distance between adjacent beams) at preset distance from apparatus. Height sign, formed laser beams, and permission marking, T. e. distance between elements marking, formed on object adjacent laser beams, are determined distance between laser beams and, consequently, may be adjusted by adjustment of degree of approach of. For this purpose sufficiently to use fast turns of deflecting device without change distance between deflecting means, that could be more time-consuming.

Arrangement of lasers can be such, that laser beams at the output of the lasers mutually parallel and form linear configuration. However, depending on a specific application, may be desirable to change the orientation of this, linear configuration of laser beams. With this for the control unit can be adapted for adjustment deflecting means so, to linear configuration of laser beams, incident on deflecting means, povorachivalas on 90° around axis, parallel to the direction of propagation of these beams. For example, they may be turned from horizontal arrangement in vertical and vice versa. This property is especially desirable, since usually signs or letter must reprinted on article or in horizontal, or in vertical direction and control unit can provide transition at least between these two important cases. To provide turn linear configuration of laser beams, a set of deflecting means may contain first set of are rebuilding mirrors, used at least with one or two scanning mirror devices.

According to one more preferred version of the invention, is telescopic device, with at least two lens and serving for simultaneous adjustment of focal distances laser beams. Simultaneity adjustment means, that laser beams of all lasers pass through telescopic device and, consequently, is tested similar effect. In particular, control unit may be made with possibility to regulate telescopic device depending on distance to object, for example so, that result focal distances of laser beams in correspondence with distance to object. At that, preferably, to when the object to apparatus or distance from it can be to maintain permanent dimensions of markings, formed on the object. Information about distance to object may be fed into control unit from transporting module, moving object, and/or using known means for measuring distance. Is expedient to install telescopic device behind deflecting means, since deflecting means are able to reduce the maximum distance between any two laser beams. This allows reduced sizes of optical elements of telescopic device.

In preferable version by is provided set of telescopic means for profiling, in particular for setting degree of convergence or divergence of and, respectively, focal distance of each laser beam, T. e. profiling can be performed separately for each beam. Thereby-Desired make it possible to compensate for variation stroke length beams, T. e. difference in optical lengths tracts, which pass individual beams of radiation, is achieved of object. These difference can be caused by the profile of the surfaces object or differences optical lengths tracts inside marking apparatus.

Each telescopic agent can contain at least two optical elements, mounted for adjustment of distance between them for realization of adjusting focal distance of, in particular at least two lenses or two curvilinear mirror. So, telescopic means can be construct, as telescopes- refraktory , using lens, as telescopes-reflectors, using mirror, or as katadioptricheskie telescopes, using at least one mirror and at least one lens.

Preferably also, to the control unit can provide linear adjustment of telescopic means (which can be viewed also as means of profiling of beams), T. e. position change of at least one optical element of each telescopic means along direction of propagation of the corresponding laser beam.

The control unit can be adapted for controlling telescopic means so, to compensate for difference in optical lengths of track laser beams, in particular difference, caused by location of deflecting means. Actually, optical length of track laser beams may differ depending on location of deflecting means, and this can lead to different sizes of irradiated sections on object. At application of telescopic means may be provided flat microwave, when all laser beams have identical focal distance, measured from the output apparatus.

Control unit may be also is adapted for adjustment of telescopic means in real time in case of change of optical lengths track in a result of adjustment of deflecting means. Additionally or alternatively, control unit may be is made for installation set of telescopic means in accordance with any information, related to change of optical lengths track, for example about vibration, or any other motion of object or redirects scanner laser beams.

According to another version of invention control unit is made with possibility of retarded in individual order activation of any laser so, to, in case of object motion relative to marking apparatus in preset direction, to provide fall on one and the same section on object in direction of object movement at least two laser beams.

Besides, independently from mutual orientation emitted by laser beams and direction of motion of object, different laser beams can create spot of (point) marking along line, perpendicular to the direction of motion of the object. Length of such line depends on orientation emitted by laser beams relative to direction of motion of the object.

Lasers preferably are assembled in foot, so that emitted by them beams form ordered configuration of laser beams, in particular ordered configuration of mutually parallel laser beams. Each laser may contain laser tube, which at least partially surround the inner space of, T. e. form closed or open ring. Emitted laser beams are directed into internal space by means of guide means, preferably made in the form of set of mirrors. Alternatively, guide facilities may be formed by output mirror components of lasers. In this case end laser tube of each laser may be directed into internal space, to set of deflecting means may be in the inner space.

At laser pipe should understood tube, adjoining a laser active medium or consisting of this medium. In case of gas lasers these tubes are hollow and are designed for receiving active gas. In solid-state lasers pipes may not be hollow, T. e. they can consist of active medium.

Cooling laser tubes can be relieved by due to the fact, that tube, mounted on opposite sides of closed or open ring, are on maximum distance from one another. This effect is achieved without increasing overall dimensions of apparatus, since optical elements are located in inner space, which corresponds to effective use of space apparatus.

In other preferable version of each laser has laser tube, which at least partially surround the internal space, and guide facilities, used for direction of laser beams, emitted by lasers, into internal space and constitutes part of telescopic means. Guide facilities may contain one mirror on each laser beam, ; this mirror can be first optical element of each telescopic means.

Alternatively, parts of telescopic means can be output components lasers, serving for injection of laser beams. Output components can be partially reflecting mirrors, the outer surface of each such mirror, T. e. surface, facing from active gas, may have any shape. In connection with this preferably give it such a shape, to each outlet component functioned as first lens telescope known design.

Preferred variant solves the problem above dshego of failure of pixel, presence of which indicates, that corresponding laser defekten and not emits required laser beam. With the aim of displacement laser beam above dshego of failure of laser control unit may be is adapted for adjustment of deflecting and telescopic means so, that when laser beam functioning laser in direction of defective laser beam. In this case telescopic means controlled by so, as to compensate for the difference between optical lengths track defective laser beam and laser beam, used for its replacement.

Other preferred variant characterized in that has, as deflecting means for each laser beam, at least one light guide and one lens. As light guides are used any flexible light guides, able to radiation with wavelengths, emitted lasers, in particular infrared radiation with wavelengths about 10 mcm. Examples of such light guides are optical fiber or hollow tube with reflecting inner surface.

Each light guide can be is equipped with inlet optical members, serving as the first deflecting facility for direction of falling on them laser beam at a required angle into core light guide. Light guides may also be are provided with output optical members, containing, in particular, at least two lenses for collecting laser radiation, coming from light guide. These optical elements may specify lateral dimensions of laser beam, its focal distance and depth of focus. In particular, output optical elements may be made, as telescopic means.

Light guides preferably have equal length. This allows to improve stability of dimensions irradiated spot and, respectively, quality of markings, formed on the object.

Invention also relates to a marking system, which contains described marking apparatus, and also povorachivayushchee agent for turning marking apparatus relative to the direction of motion of marked object.

As will be explained further, realization of turning marking apparatus allows changing of permission of printing, T. e. distance between points marking on object in direction, perpendicular to the direction of motion of the object. This permission is set distance between fascicles in the given direction. Distance between beams in direction of object movement has no unfavorable influence on permission printing, because moments of activation of lasers may be detained of, until object not travels distance, equal to the distance between the beams in direction of object movement.

So, may be varied distance between the beams in direction, perpendicular to the direction of motion of the object, implementation of turning marking apparatus and, consequently, of ordered set of laser beams. The control unit preferably is made with possibility of turn the marking apparatus with means of rotating depending on desirable resolution of printing.

In case of linear configuration of laser beams angle between linear configuration laser beams and the direction of motion of the object sets distance between points of marking on object in direction, perpendicular to the direction of motion of the object. Distance between adjacent points marking is maximum, if linear configuration of laser beams is perpendicular to the direction of motion of the object. To to assign shorter distance, can be reduced angle of turn. In combination with correct selection of moments operation of lasers, angle of rotation can be set in such a, to point marking was continuous line or separated by point marking. May also be to form point marking with mutual application, to provide different intensity of points marking, for example in mode printing on gray scale of. Besides, angle of rotation may be equal to zero, which will lead, at introduction of corresponding delays between moments emission, T. e. moments of activation of lasers, to full superposition of all points marking.

Description of the Invention, and also its different features and advantages as more understandable from below of the following description at its seen together with the annexed drawings, which serve as not involving restrictions illustrations and on which similar components have similar designations.

On Figure 1 shown is shown first version marking apparatus by the invention.

On Figure 2 α-2c is presented, different types of, first configuration sets of means for profiling beam and deflecting means.

On figs. Behind- ZS is presented, different types of, second configuration sets of means for profiling beam and deflecting means.

On Figure 4 α and 4bs is presented, different types of, third configuration sets of means for profiling beam and deflecting means.

On Figure 5 is presented one more configuration set of deflecting means.

On Figure 6 is illustrated configuration are rebuilding mirrors set of deflecting means, which serves for imparting laser beams of two-dimensional configuration.

On Figure 7 shown marking system according to the invention and marked object, moving relative to it.

On figs. 8A-8D shown illustrated of laser beams, coming from marking apparatus according to the invention, relative to direction of motion of the object, and formed by them marking.

On Figure 1 shown is shown first version marking apparatus 100 according to the invention. This apparatus has plurality of lasers 10, each of which emits laser beam, used for producing marking on object (not is shown). Apparatus 100 also has optical means 30, 40, 45, 50, to configure and to direct laser beams.

In present example plurality of lasers 10 consists of 9 gas lasers 10a-10i. Instead of gas lasers can be used lasers other types of. In general case preferably have sufficiently large amount of gas lasers 10, for example at least 4 or 6 lasers. Each gas laser 10 has laser tube 12, communicating one with another fluid medium. This means, that laser tube 12 one gas laser form total volume. Fluid medium connection allowed also between laser tubes 12 of various lasers 10.

In present version gas lasers are S0_{2 lasers};

respectively, active gas contains, among other components, S0_2, Ν_{2 and not}.

Laser tube 12 are arranged in the form of ring, surrounding inner (T. e. free central) space 5 between them. Ring is formed with the use of connecting elements 16 for connecting mutually adjacent laser tubes 12, belonging to one laser. Connecting members 16, located at the corners collected in foot lasers, carry mirror for reflection of laser radiation from one of relatively adjacent tubes 12 in other. Course, all mirror are selected with due regard for used active gas. In subject version mirror contain material, reflecting on wave lengths, emitted by S0_{2 laser of}, T. e. in the middle infrared region, first of all, in 10.6 mcm. So, can be used copper mirror and/or mirror with substrate and coating, increasing the reflectance and/or preventing darkening under action of air.

In present example laser tube 12 form hermetic ring of rectangular shape. In general case Acceptable and any other form of, providing at least partial coverage of internal space 5, such as triangular, square or u- οbρaznaya.

Laser tube 12 of each gas laser 10a-10i form a hermetically sealed volume. Volumes of various lasers can be separated from each other or be linked, to obtain common sealed volume. At usage of sealed lasers usually is desirable, to composition of active gas remained constant in for long period. With this for total gas volume is increased with the help of additional gas reservoir 19. Gas in the reservoir not excited to generate laser radiation. Instead reservoir 19 connected with volumes of one or several laser tubes 12.

Marking apparatus 100 also has exciting means (not are drawn) for each laser tube 12 and cooling units (not are drawn), attached to laser tubes 12. May available one cooling unit on each side of the cubic configuration of laser tubes 12, so that each cooling unit cools not a single laser tube, and many tubes 12 of various lasers 10a-10i. In cooling blocks may be made multiple channels, which can circulate coolant.

Laser tube 12 of each laser 10 are in separate, individual flat layers. Lasers 10, substantially, are identical, ; they are installed on each other and mutually parallel.

Rectangular contour lasers 10 can be is open (open) on one angle. In present version such angle is left upper angle, in which there is integrated output flange 17. In this angle volume of laser is finished rear mirror 18 for reflection of laser radiation back inside the tube 12. Rear mirror can be is connected to end of the tube 12, which is maintained integral outlet flange of 17, or directly to this flange.

The other end of the volume of the laser is finished on the same angle outlet component 13. This component, providing elimination of laser beam, may also be connected to the end of the tube 12 or to an integral outlet flange 17. Output component 13 can be partially reflecting mirror and in this case be considered as partially reflecting output component. Emitted laser beams is directed into internal space 5 by means of guide means 14. In alternate of loudspeaker has its guide 14 has at least one mirror, mounted on integral outlet flange 17. Laser beams, reflected from guide means 14, enter internal space 5 through hole in integral outlet flange 17. In general case usage of one integrated output flange 17, common for all lasers 10. In present version, however, there is one integral outlet flange 17 on each laser 10, each integral output flange 17 has one guide 14 and one hole, through which may pass corresponding laser beam.

In inner space 5 are optical means 30, 40, 45, 50 for profiling and deviation of laser beams. Such configuration to decrease volume of space, required for apparatus. Besides, since opposite laser tube 12 of each laser are separated by inner space 5, is cooling tubes 12.

Laser beams, exhaust from guide means 14, are directed on a set of 40 means for profiling beam for perefokusirovaniya laser beams. Set of 40 means for profiling beam has a one such agent 40a-40i for each laser beam. As a result of focal distances of laser beams can be given independently one from another. In drawing shown, each facilities 40a-40i profiling of beam contains one lens. However each such agent can contain at least two optical elements, for example two mirrors or two lenses, which form telescopic agent. In this case control of focal distances laser beams require only small displacements of optical elements of telescopic means.

Then laser beams fall on set of 30 deflecting means. In illustrated example laser beams first pass through sets of 40 means for profiling beam. However this order may be changed;

alternatively, members of both sets of may be alternated, T. e. one element of set of 40 for profiling beam may be installed between the two members of the deflecting device.

Allowed also, to guide 14 was part set of 40 telescopic means or set of 30 deflecting means. In the last version guide facilities 14 may first set of are rebuilding mirrors. As result will be achieved desirable reduced number of optical elements.

In present version, a set of 30 deflecting has two deflecting agent on each laser beam (on Figure 1 shown only one deflecting agent 33a-33i on each beam). These deflecting means can be considered also as first set of 33 are rebuilding means. In general case deflecting means may be any means, which change direction of propagation of laser beam. In illustrated example deflecting agents are mirror. Mirror can be installed independently one from another. As a result, configuration of laser beams, incident on deflecting means set of 30, can be changed by adjustment of position of individual mirrors 33a-33i, which, consequently, can be considered as perestraivayushchie mirror.

Perestraivayushchie mirror 33a-33i are installed with the possibility of turning and translational displacement. For turning each perestraivayushchee mirror 33a-33i is installed in gimbal suspension. The control unit (not is shown) can be made with possibility of set desirable position of each tunable mirror 33a-33i, acting on its suspension.

Laser beams, outgoing from set of 30 deflecting means, fall on common optical elements, T. e. optical elements, on which are directed all laser beams. These members can represent telescopic device 45 for joint adjustment of foci of laser beams. In distinction from described set of 40 telescopic means, telescopic device 45 acts in equal degree of on all laser beams.

Optical elements, arranged along the beams, may contain also means for changing or diffusion condensate uniformity of profile intensity of laser beams, devices for change of polarization of laser beams, in particular for providing the constant polarization over the entire cross-section of laser beam or for axon laser beams.

To complete, laser beams discharged from apparatus 100 by means of mirror scanning device. This device may contain two galvanometricheskikh of scanner 50, in each of which there is total rotary mirror 50a, on which are directed all laser beams. Two galvanometricheskikh of scanners switches 50 provides easily to assign for laser beams any direction of propagation of.

On Figure 2 α-2c is presented, different types of, first version configuration of set of 30 deflecting means and set of 40 means for profiling beam.

To provide profiling and collimation laser beams 90a-90i, set of 40 means for profiling beam has a multiple means 40a-40i for profiling beam, in each of which has at least two lenses 41, 42. For adjustment of focus of each laser beam 90a-90i and, thereby, of sizes of irradiated spot on marked object, can be moved lens 41 and 42 in the direction of propagation of laser beams 90a-90i. So, means 40a - 40i for profiling beam form telescopic means. Since there is one teleskopicheskomu agent 40a-40i on each laser beam 90a- 90i , is possible also adjustment beams with order to compensate for the difference their optical lengths of track.

After passing through telescopic means 40a-40i laser beams 90a-90i fall on set of 30 deflecting means, which contains the first and second sets of 33, 34 are rebuilding mirrors. As a result of each beam 90a-90i radiation is directed one of first are rebuilding mirrors 33a-33i on one of the second are rebuilding mirrors 34a-34i. Perestraivayushchie mirror first set of 33 and of the second set of 34 are configured in the form of linear sets of 35, 36, respectively.

In present example laser beams 90a-90i rebuilt by means of set of 30 deflecting means so, that linear configuration of laser beams is developed, for example, on 90°. So, circumscribed configuration may viewed as device pixel by pixel retuning horizontal linear of vertical. First and second sets of 33, 34 are rebuilding mirrors are located in one plane sti and are perpendicular to each other.

At usage of cardan of suspensions sets of 33, 34 are rebuilding mirrors can be regulated so, to outlet laser beams 90a-90i were mutually parallel and have desirable direction.

Second set 34 are rebuilding mirrors can scanning motion laser beams 90a-90i to unseal sign on object. Alternatively, this set may direct laser beams 90a-90i on mirror scanning device.

On figs. Behind- ZS shown is presented, different types, other configuration set of 40 means for profiling beam and set of 30 deflecting means.

This configuration differs from previous one vision statement presented eniem first and second sets of 33, 34 are rebuilding mirrors. In subject version these sets of form linear sets of, which-distinct from previous configuration-not lie in one flat sti, and, with the aim of reduction of distance between laser beams 90a-90i, are located at an angle to each other, equal in this version 45°. At that linear configuration of laser beams 90a-90i is turned by 90°.

On Figure 4 α and 4bs is illustrated one more preferable configuration sets of 33, 34 are rebuilding mirrors. As in previous versions, configuration by Figure 4 α and 4bs has perestraivayushchie mirror first and second sets of 33, 34, each of which is configured, as linear set of 35, 36.

However in this version perestraivayushchie mirror second set 34 turned (inclined) so, that reflected laser beams 90a-90i approach. Other words, with the aim of variation of resolution of and size of formed markings, distance between beams additionally reduced taking into account desirable distance between them on required distance from the apparatus.

Perestraivayushchie mirror second set 34 are preferably made rotary (naklonyaemymi) by means of cardan of suspensions by commands of control unit. Perestraivayushchie mirror first set of 33 may be fixed (to make sliding displacement of these mirror during printing) or are also mounted on gimbal suspensions.

In variants, shown on figs. 1-4Β, scanning motion laser beams 90a-90i can be turning are rebuilding mirrors 34a-34i second set 34 are rebuilding mirrors. In this case scanning type device galvanometricheskikh of scanners switches with common mirror for sending all laser beams 90a-90i are not obligatory. However the presence of such scanning devices can also be useful.

For imparting deflecting means of any configurations by Figure 1, 2α-2c, behind- ZS and 4α, 4bs is advisable to use the control unit.

On Figure 5 shown is other configuration are rebuilding mirrors 33a-33i (shown only first set of 33 such mirrors in set of 30 deflecting means). Forming linear configuration of laser beams 90a-90i, passed through telescopic means 40a-40i, are reflected from are rebuilding mirrors 33a-33i so, that distance between these beams are reduced. The distance between any two adjacent reflected laser beams 90a-90i are equal between themselves. In illustrated example linear configuration of laser beams 90a-90i not turns relative to flat sti, specified perestraivayushchimi mirrors 33a-33i and telescopic means 40a-40i. Like turn are rebuilding mirrors led least to change of distances between the beams. Therefore in this version scanning motion laser beams 90a-90i may be the second set of deflecting means or at least one scanning type device depicted on Figure 1.

Reduced distances between beams allows to optimize design foot gas lasers with respect to cooling by means of heat conductivity and radio-frequency excitation without deterioration of permission or restrictions on dimensions of printed symbols, T. e. can compensate considerable distance between gas lasers.

On Figure 6 is presented configuration are rebuilding mirrors for perestraivaniya laser beams 90a-90i in bidimensional configuration of these beams, for example in the form of square 3x3. In this case a set of 30 deflecting means also contains first and second sets of 33, 34 are rebuilding mirrors. In illustrated example telescopic means 40a-40i are installed between the first and second sets of 33, 34 are rebuilding mirrors. However, instead, telescopic means 40a-40i may be before the first set of 33 or behind the second set of 34 are rebuilding mirrors.

On Figure 6 shown also guide facilities, which reroute beams 90a-90i radiation, going from lasers to the first set of 33 are rebuilding mirrors. These means are formed of a set of mirrors 14a-14i. In other variants of this set of can be replaced one long mirror.

Perestraivayushchie mirror 34a-34i second set are configured in the form of two-dimensional set of, providing reflected from them laser beams 90a-90i bidimensional configuration. Advantages of the of given version consists in significant decrease of distance between most distant from each other laser beams 90a, 90i, especially compared with any linear configuration laser beams. Beams are grouped considerably more tightly, so that they pass through central part of optical elements, including focusing optics 45. Because optical aberration are created, mainly, external zones of optical elements, two-dimensional configuration provides advantage improved focusing and improved quality laser beams. Reduced distortion compared with linear configuration laser beams especially is considerably for external laser beams. Furthermore, can be reduced dimensions of optical elements, which will lead to Your Exploration total cost apparatus.

At in versions by figs. 1-6 deflecting means are formed mirrors, instead of them can be used light guides. At least one end of each light guide, preferably both end, may be related to positioning devices, controlled a control unit for individual adjustment of deviation, provided by corresponding light guide. After installation end of optical fiber in the preset position, is corresponding to tuning lens, used for supply of laser radiation in optical fibre or for collecting this radiation on outlet from optical fiber. This lens forms second deflecting agent.

On Figure 7 shown is indicated marking system 120 and marked object 1.

Object 1, moving in direction 2, is presented in three different positions, T. e. in three different moment. Marking system 120 has a marking apparatus 100 and povorachivayushchee agent 110 for turning marking apparatus 100.

Marking apparatus 100 can contain any of described components, for example deflecting means, formed by two sets of are rebuilding mirrors, configured, as linear sets of. As shown on Figure 7, there are also unit 20 control and Positioning facilities 60, used for positioning of linear sets of are rebuilding mirrors. Individual perestraivayushchie mirror corresponding set of may be installed without possibility of translational movement, but with the possibility of rotation (inclination), for example, with use of cardan of suspensions.

Marking apparatus 100 emits multiple laser beams, three of which (beams 90a, 90 , 90s) shown on Figure 7. In process of movement of object 1, respectively, change direction of laser beams 90a, 90 , 90s.

Change of (designated, as d) distance between vehicle 100 and object 1 can depend on shape and position of object 1. Besides, to a specific moment of this distance for each laser beam 90a, 90 , 90s may be different. Despite this, dimensions of spots, irradiated laser beams 90a, 90 , 90s on object 1, should be identical. With this purpose there are described means for profiling beam, customizable unit 20 control.

Furthermore, with links to figs. 8A-8D, on which shown illustrated arrangement of laser beams 90a-90i, emitted by vehicle 100, relative to direction 2 of motion of the object, will explained functioning rotating means 110.

Figure 8 α corresponds to linear configuration of laser beams 90a-90i, parallel the direction of motion of the object. At least two laser beams 90a-90i fall on one and the same section of 80 on object 1 as a result of individual selection of delays activation of gas lasers. So, delay may be set equal to distance between laser beams 90a-90i, divided by speed of object or on component of this speed in direction to linear configuration of laser beams.

On figs. 8B-8D linear configuration of laser beams 90a-90i is turned, for example, with the aid of rotating means 110 relative to direction 2 of the object motion by an angle α. In combination with delay activation of this turn leads to raspechatyvaniyu line, formed by points (spots) 81-89.

These point 81-89 may have partial application (cm. figure 8 in) or be spatially separated (cm. figure 8 and 8D). Length of formed so line is set angles between laser beams 90a-90i and the direction 2 of motion of the object. Size of each of points 81-89 and, consequently, width line may be given with the help of means for profiling beam.

Described marking apparatus allows effectively change distance between beams and configuration multitude of, generated by lasers. Each laser beam can individually be controlled with the help of means for profiling beam. Placement of optical elements in space, surrounded with a lasers, allows attenuated spatial limiting.