Abstract: Imaging apparatus for producing the image of a radiating object which exists in a noise-producing background, includes an optical transducer including a focal plane array or radiation detectors. Light collected by a partially filled entrance aperture is relayed to a partially filled focal plane array by relay optics which include one or more variable phase retardation devices. For example, two movable mirrors per dimension driven in push-pull by piezoelectric drives operate as phase shifters. Interference of incident light from separated parts of the entrance pupil at a series of path differences allows the initially distorted image to be dissected into a series of constituent images at several narrow wavelength intervals. The arrangement of the instrument is so chosen that each constituent image carries information about a different region of spatial frequencies.

Abstract: Apparatus for handling photographic film having a first format and alternatively photographic film having a second format different from the first format comprises photographic imaging equipment has a first unit including a first photographic lens system and an integral first extension for defining a first image aperture, and a second unit including a second photographic lens system and an integral second extension for defining a second image aperture. A film pressure plate clamps photographic film having the first format and photographic film having the second format alternatively against the mentioned first extension and against the mentioned second extension. A device is coupled to the film pressure plate for actuating said pressure plate relative to the first extension and alternatively relative to the second extension. These actuating means are mounted in a stationary relationship relative to equipment for releasably mounting the first unit and alternatively the second unit.

Abstract: A camera for photographing information on microfilm comprises structure defining an image aperture, a lens system for projecting an image of the information to be photographed along an optical path through the image aperture, and a device for selectively clamping microfilm against the image aperture defining structure. The image aperture defining structure and the clamping device are mounted and restrained against lateral movement relative to the optical path. A carriage is movable relative to the image aperture defining structure, the lens system and the clamping device, and carries equipment for advancing microfilm between the image aperture defining structure and the clamping device.A photographic film handling apparatus wherein photographic film is positioned at a structure defining an image aperture comprises a film pressure plate having a cluster of air holes for an escape of air from a space between the film pressure plate and adjacent photographic film.

Abstract: A sorter for reclaiming particles, such as glass particles, of a predetermined color or transmissivity utilizes a belt conveyor having a longitudinal row of openings over which particles are positioned for being conveyed past a light source and light sensor on opposite sides of the belt to sense the transmissivity, or color of the particles. Glass particles having a predetermined transmissivity are separated by suitable facilities, such as an air jet directed through the openings in the belt.