Patent
Device for providing a substantially flat light field
TLDR
In this article, the surface of a transparent disc is made opaque and light is coupled to the optical system through the edge of the disc by reflection from the internal surface of the disk.Abstract:
A device for providing a substantially flat light field to a light imaging medium includes a transparent disc and an optical system. The surface of the disc is made opaque and light is coupled to the optical system through the edge of the disc by reflection from the internal surface of the disc. The intensity of light passing through the disc to the optical system decreases as the distance from the coupling edge increases. The combined effects of the disc and the optical system result in a substantially flat light field.read more
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Lighted display device
TL;DR: A lighted display device as discussed by the authors comprises a display panel having a plurality of lighting elements arranged in a pattern, one end of each of the light conducting fibers are removably received within lighting element locations on the display panel and the other ends of the fibers are retained within a support member.
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Patent
Light diffusing device
TL;DR: A light diffusing device for obtaining a surface uniform in the brightness by using a luminous flux narrow in the radiating angle comprising a flat smooth transparent base plate having a favorable transparency and including a conical concavity formed on the other side surface opposed to said one side surface, aligned with the luminous fluid incident area and having a bottom area at least equal to said area and light diffuser reflecting means provided on all the side surfaces except the above mentioned other surface.
Patent
Control system for varifocal objective
TL;DR: In this article, the correlated positions of two axially shiftable components of a varifocal objective are stored in a memory from which they can be read out to control respective drives during a zooming operation.
Patent
Reflecting telescopic objective of the cassegrainian type
TL;DR: In this article, the Cassegrainian telescope of the reflecting type is described, in which the object mirror is concave while the secondary mirror is of convex curvature.