Abstract: A large document scanner has a transparent top plate glass plate large enough to support an E size drawing. The base of the cabinet supports a trapezoidal mirror tilted up from the bottom with the larger parallel side above the bottom. The image of a document on the transparent plate is reflected by the trapezoidal mirror to a digital imaging camera system having a mechanically displaced electronically scanned array located inside the cabinet to the side. Tubular lamps located adjacent to bowed out upper sides between upper and lower planar reflectors illuminate the document on the transparent top glass plate.

Abstract: A stereo microscope has a stereo pair of photographs illuminated by a condenser lens illuminating system. A pair of primary magnifying objective lenses focus a magnified image of the stereo pair upon a pair of small diffuse screens. A pair of large aperture objective lenses focus the images on the small diffuse screens in superimposed relationship upon the plane of a large field lens that focuses respective ones of the superimposed further magnified images upon a pair of exit pupils through which an observer looks. The primary magnifying objective lens, the small diffuse screen and the exit pupils are aligned along respective left and right optical axes. The large aperture objective lenses are displaced slightly toward each other from these optical axes. The field lens is centered about an axis midway between the left and right axes.

Abstract: Undesired reflections in a photosensor array encapsulated in a glass-covered housing are reduced by including between the cover and photosensor array a solid or fluid adapted to substantially match the index of refraction of the cover.

Abstract: A completely mechanically operated microscope bridge includes rapid rough positioning, fine positioning, coarse focusing and fine focusing with an automatic locking system locking the microscope at the position set by the operator whether power is on or off. In the focusing mechanism the drive slips when the microscope hits the viewing platen or if the microscope rhomboid is caught under the cross beam or overhanging arm on the light table while being raised. A brake prevents the microscope from being manually pushed into the viewing platen. In the x and y plane movement mechanisms torque limiting clutches prevent damage to the drive mechanisms, and a slip clutch allows turning of a positioning knob without driving when the bridge reaches the end of travel.

Abstract: A compact and simple laser beam recorder is arranged to minimize line scan displacement error typical of such recorders using a rotating polygonal mirror scanner.

Abstract: A light source illuminates a film stage through a magnifying lens that is selectively transmitted to a photodiode array over a first path including a mirror and pellicle and a second path including the first mirror and the pellicle, a selectively movable second mirror, third and fourth mirrors, a first lens element between the second and third mirror and a second lens element between the third mirror and the pellicle providing a reduction of three. Relay optics between the pellicle and a fourth mirror provides an image of the film stage on a screen. The column of 1024 diode detectors are electrically scanned to provide one dimension of a rectangular scan of the image and mechanically displaced to provide the other scan dimension. The output of the photodiode array is coupled to a recording system that may be analog or digital to record an electrical representation of the image on the film stage.

Abstract: Incandescent light bulb efficiency is improved by: (1) modifying the surface micro-structure of a lamp filament in such a way as to increase the emissivity in the visible region of the spectrum without significantly increasing this quantity outside this spectral region, or suppressing the emission of energy outside the visible portion of the spectrum by modifying the surface structure; (2) application of refractory coatings on the lamp filament that are highly emissive in the visible region of the spectrum; and (3) coating the filament with an "optically thin" refractory material to suppress filament evaporation, permitting higher operating temperature.

Abstract: A compact stereo light table includes a pair of high intensity spot sources on a diffusely illuminated background that are selectively diffuse or specular. There are controls for spot brightness, diameter and positioning and specular to diffuse adjustment.

Abstract: A fixed drum has input, output and developing segments of aluminum to provide a cool input and output segments thermally separated from a heated developing segment maintained at substantially constant temperature. The film to be developed passes beneath a wire at high electrical potential relative to the drum to receive charge from a corona discharge that produces electrostatic forces securing the film to an endless belt that carries the film around the drum wrinkle-free. A pair of input rubber drive rollers drive the belt around the drum. The film to be processed is placed on the belt between the drive roller and drum. An output pair of metal rollers partially drain the charge from the developed film and belt and guide the film toward the exit slot. The inner surface of the belt is electrically conducting low friction tetrafluoroethylene to allow the belt to move freely around the stationary drum. The belt outer surface is silicon rubber which may be impregnated with carbon.

Abstract: A light source illuminates a film stage through a magnifying lens that is selectively transmitted to a photodiode array over a first path including a mirror and pellicle and a second path including the first mirror and the pellicle, a selectively movable second mirror, third and fourth mirrors, a first lens element between the second and third mirror and a second lens element between the third mirror and the pellicle providing a reduction of three. Relay optics between the pellicle and a fourth mirror provides an image of the film stage on a screen. The column of 1024 diode detectors are electrically scanned to provide one dimension of a rectangular scan of the image and mechanically displaced to provide the other scan dimension. The output of the photodiode array is coupled to a recording system that may be analog or digital to record an electrical representation of the image on the film stage.