An optical projection viewing system of the type having a rotating lenticular screen mounted in an adjustable viewing housing is provided. The height of the front of the viewing housing is adjustable up and down to adjust to the proper eye level of the user. The optical path of the system is provided with structure which automatically changes the direction of the optical path to automatically adjust for height adjustment of the viewing housing.

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 whic...

An apparatus known as a common module for converting a thermal scene into a visible image. The apparatus comprises an infrared objective, a pivotal mirror which can be pivoted back and forth about an axis, an infrared detection array comprising a plurality of detectors, and a linear display array which is connected to the infrared detection array via an amplifier arrangement. The radiation emitted by the display array is imaged in a plane of observation, preferably via the back of the pivotal mi...

Apparatus for viewing a predetermined sector; such as, the right hand rearward side of an automobile by way of a right rear view mirror; via an altered reflection characterized by a first lens for reducing and inverting the view from the right rear view mirror; a second lens for righting the inverted view; small tubular housing enclosing the first and second lenses; enlargement housing connected with the small tubular housing and having a viewing aperture penetrating through a viewing side; a ma...

An electromagnetically shielded viewing window for an enclosure including a wire mesh member formed of respective crossing wires bonded between a pair of transparent panels, wherein the wire cross points are joined by nickel/copper plating of the wire mesh without covering the mesh open areas. A dull coating of antiqued silver is applied to the plated wire mesh to reduce window glare. A wire gasket extends around the panel perimeter, and a wire mesh portion projects beyond one of the panels and ...

A camera, processor and viewer is disclosed wherein the migration imaging system is utilized as the photosensitive element. The device is provided with the capability of recording an original image on the migration image film, instantly developing the image by means of heat application and also provides means for viewing the developed image immediately upon development without removal of the migration image film from the device. The device is semi-automatic in operation and is electrically power...

A thin rectangular hollow-boxed viewing screen containing a thin, flexible, soft, convex Fresnel lens; is placed and aligned in front of a T.V. set. Audio sound waves are used to continuously vary the radius of curvature, the focal position, the angle of incidence, effective thickness and shape of the lens medium. All of these changes are made in a continuous and rapid manner that produces pseudo three-dimensional images from a two-dimensional source. The rectangular box-like viewing screen is s...

The invention is a low cost, low input power eye viewing device well suited for viewing wide field retinal images through an undilated pupil. Included in the device are a converging light illumination system and an aperture stop. The converging light illumination system provides ease of entry of light rays into an eye, wide field retinal illumination, reduced glare and reduced power consumption. The aperture stop blocks unwanted received glare light not forming part of the retinal image. The dev...

A nonreflective, directional diffusing, rear projection plastic viewing screen for close audience viewing. The screen comprises a composite Fresnel lens structure which includes suitably crossed convex cylindrical Fresnel lens patterns, and a superposed lenticular sheet structure for focusing incremental images--from horizontally overconverged light--at acentrically positioned light-transmitting areas on an opaque, plane viewing surface.

A box structure having a light source therein and a light transmission panel on the front thereof to receive X-ray films thereon for viewing with back-light illumination is provided with a horizontal cross bar detachably secured across the light transmission panel at a predetermined vertical position to divide the viewing screen into upper and lower viewing areas. The bottom of the cross bar is provided with a portion for detachably retaining a film edge for viewing of a film in the lower viewin...