HEADGEAR MOUNTED DISPLAY VISOR

A visor for mounting on a helmet adapted to be worn by an individual, includes a substantially transparent visor having an inner concave surface, and, with references to an orthogonal, right-handed xyz Cartesian coordinate system of spatial reference having is origin located on the inner concave surface and its z-axis parallel to the line of sight of the individual wearing the helmet, the inner concave surface being defined by a cross-section of the visor in the x-axis of reference, which is symmetrical about both the origin and the y-z plane of reference, having one-half of the cross-section of the visor in the x-axis of reference being a first circular segment containing the origin at one end and connected at its opposite end to one end of a first paraboloid segment which is connected at its opposite end to one end of an elliptic segment whose oppose end forms a side boundary of the visor, and by a cross-section of the visor in the y-axis of reference having a second circular segment, ...

HEADS-UP DISPLAY COMBINER UTILIZING A CHOLESTERIC LIQUID CRYSTAL ELEMENT

HEADS-UP DISPLAY COMBINER UTILIZING A CHOLESTERIC LIOUID CRYSTAL ELEMENT A heads-up display (HUD) system employs a cholesteric liquid crystal combiner, an image source, and collimating optics to combine a generated image with an image in an observer's field of view. The cholesteric liquid crystal combiner has a bandwidth, B, around a primary wavelength of maximum reflection, and the image source projects its images within bandwidth B for high efficiency of reflection. Outside bandwidth B the cholesteric combiner has a high efficiency of transmission. Images from the image source are projected upon the combiner which reflects the images toward the observer, together with images from the outside environment in the line-of-sight of the observer. Collimating optics are used to focus the projected images at a distance away from the observer.

ELECTRONIC BORESIGHT

ELECTRONIC BORESIGHT Pairs of level sensing devices are used in a method that aligns plane surfaces to one another. One of the pairs of level sensing devices is located on each of the plane surfaces. the level sensing devices of each pair are aligned and positioned parallel to two orthogonal axes of the plane. The output signals from corresponding ones of the pairs are differentially compared, and one of the platforms adjusted in pitch and roll to minimize the values produced by the differential comparison. The platforms are then tilted equal amounts and adjusted in azimuth.

INTEGRATED CONTROL AND DISPLAY OF AIRCRAFT ATTITUDES

PRECISION LATCH ASSEMBLY HAVING MEANS FOR RESTRICTING PIN MOVEMENT IN THREE DEGREES OF FREEDOM

An improved latch assembly having a latch body adapted to be coupled to a generally fixed support, such as a chassis unit, wall or post. The latch body has a groove for removably receiving a retained pin which is adapted to be mounted on a movable structural member to be latched, such as a door, support arm, gate or the like. The latch body further includes a latch pin which is spring biased into engagement with the retained pin when the retained pin is received in the groove of the latch body. The inter-engagement of the retained pin and latch pin is such that the retained pin is restricted against movement in three mutually perpendicular directions, namely the x, y and z directions. The retained pin has a pair of spaced, cylindrical parts on opposite sides of a pair of beveled parts which converge toward each other to an annular junction therebetween. The latch pin has a conical end portion for engaging the beveled parts of the retained pin to resist axial movement of the retained pin ...

OPTICAL COLLIMATING APPARATUS

OPTICAL COLLIMATING APPARATUS An optical collimating apparatus employs a semi-reflective concave mirror and cholesteric liquid crystal element. In one embodiment, the optical collimating apparatus is used as a heads-up display device. Images in the line of sight of an observer substantially pass through a transmitter/combiner, semi-reflective concave mirror, and cholesteric liquid crystal element to an observer. Images generated by an image source are focussed on the transmitter/combiner such that the transmitter/combiner reflects the images into the line of sight of the observer. The generated images are transmitted by the primarily transmissive (convex) side of the semi-reflective concave mirror to the cholesteric liquid crystal element. The cholesteric liquid crystal element reflects the generated images back toward the primarily reflective (concave) side of the semireflective concave mirror, which in turn reflects the images back toward the cholesteric liquid crystal element, which ...

BACKLIGHT FOR LIQUID CRYSTAL DEVICES

A backlight system for liquid crystal device display is equipped with a dual lighting system for day viewing and compatible with night vision systems. The day lighting system uses conventional fluorescent or incandescent lamps for full color display during daytime use. The night lighting system uses a light source which is either filtered to remove infrared and near infrared wavelengths or which is chosen from a class of sources which does not emit such wavelengths. The day lighting system is disabled while the night system is in use.

ELECTRONIC GENERATOR FOR CONTACT ANALOG AND COMMAND INFORMATION

CONTACT ANALOG

COMPACT HELMET MOUNTED DISPLAY

A display apparatus for use with headgear, includes in combination visor means adapted to attach to the headgear and having a visor viewing area segment positioned in the line-of-sight of a wearer of the headgear. Optical display generating means are adapted to be attached to the headgear. Parabolic mirror means are interposed in the optical path from the optical display generating means to the visor viewing area segment. Fold mirror means, including at least one fold mirror positioned to receive the image from the parabolic mirror means for directing the image to the visor viewing area segment, is provided, whereby the size and curvature of the visor can be minimized without affecting transmission of the image.

WAVE GENERATOR FOR PROVIDING TAPE DISPLAY OF CONTINUOUSLY CHANGING DATA

STEREOSCOPIC DISPLAY

Kalmanash PATENT Docket No. 3688 Page 27 A stereoscopic display capable of displaying monochromatic or colored views of moving, three dimensional scenes comprises means for sequentially projecting alternate ones of successive pairs of substantially monochromatic images corresponding to right-eye and left-eye perspectives of the scene at a display rate sufficient to avoid a perception of flicker in the images. A variable polarizer is used to circularly polarize alternate ones of the images in respectively opposite senses synchronously at their projection rate. The images are analyzed by highlytransmissive eyewear comprising at least one pair of oppositelysensed cholesteric liquid crystal circular polarizers tuned to the particular color wavelength of the images and disposed, one over each eye, to transmit appropriately-polarized images to corresponding eyes and to reflect inappropriately-polarized images away therefrom.

DISPLAY SYSTEM FOR PROVIDING INTEGRATED DISPLAY OF AIRCRAFT INFORMATION

VISUAL CUE GENERATOR CIRCUIT

METHOD AND APPARATUS FOR MULTI-COLOR DISPLAY

A field sequential color shutter display system including a light source emitting light rays having substantially first and second different primary colors. First and second light polarizing filters are included. The filters are aligned in optical communication with the source. Each filter includes a color selective polarizing filter having substantially orthogonally oriented absorption axes. The first absorption axis of each light polarizing filter passes linearly polarized light of the first color and a uniform first polarization. The second absorption axis of each light polarizing filter passes linearly polarized light of both the first and second colors and a uniform second polarization. Variable optical retarding filters are disposed between the first and second light polarizing filters. Switching filters are in communication with the variable optical retarding filters to selectively provide first and second switching states to produce respective first and second amounts of optical ...

Head-up display combiner utilizing a cholesteric liquid crystal element

Methods for forming composite tubing having tapered ends

Reinforced composite tubes having integral tapered ends are formed on mandrels which are tapered at each end. Reinforcement fabric is first conformed to the mandrel with at least one end of the fabric structure retaining an opening therein. The mandrel is disassembled and removed through the opening, and a matrix cured within the fabric to produce the desired composite. Usually, the fabric structure will be cured in an external mold with an inflatable mandrel inserted through the opening applying internal pressure.