ABSTRACT In an optical coupling system for a fiber laser, a cylindrical lens extends parallel to a number of aligned light sources and a series of aligned input ends of optical fibers facing the light sources. Output ends of the fibers pass light to a solid state medium in a laser cavity. A block with precision grooves holds the fibers...

ABSTRACT Voidable articles are made with an identification code and a radiant energy responsive material coated over said code. The material is invisible and remains unactivated in ambient light but obscures the identification code upon being exposed to radiant energies such as heat or light from within a particular wavelength range. Printing can be accomplished by imaging light onto a...

ABSTRACT A low cost optical system which incorporates a low ultraviolet output tungsten halogen light source and solid state photodetectors and circuitry in such a way as to provide reliable fluorometric test results. The attainment of reliable results using such components is made possible by incorporating highly ultraviolet transmissive optics to maximize ultraviolet light throughput and by using solid state...

ABSTRACT An improved operating microscope includes a beamsplitter for splitting a portion of the visible image of the object, and an image enhancement device for performing image enhancement techniques on the split portion of the visible image. The enhanced visible image is then combined in real time with the unenhanced visible image so that a surgeon using the operating microscope...

ABSTRACT An apparatus for viewing a region within a body cavity or the like. The apparatus includes an elongate light pipe having a distal end and a proximal end, which light pipe illuminates the region to be viewed adjacent the distal end of the pipe. An objective lens system is carried at that distal end which in a preferred embodiment...

ABSTRACT An elongated optical system for use as a camera viewfinder. The system comprises four lens groups and four mirrors arranged around the second group to fold the system optical axis and provide for proper image orientation. Group power distribution is of form negative, positive, positive, and then positive with the first and second group structured to form an intermediate...

ABSTRACT Apparatus for optically coupling a plurality of optical fibers in predetermined combinations. Each optical fiber fits into and is supported by an expanded-beam type optical component that is optically structured to collimate, or nearly collimate, the output from an optical fiber when the fiber is located at, or nearly at, the focus of the optical component. The optical components...

ABSTRACT Apparatus and method for testing the optical throughput or efficiency of lens structures adapted to be used in pairs to make a connection between optical fibers by imaging one fiber end, serving as input, via the connector pair into the end of the other fiber end, serving as output. The apparatus comprises structure by which the output beam of...

ABSTRACT A viewfinder assembly fabricated virtually exclusively of injection molded plastics includes a housing, four lens groups, four mirrors for folding the optical path and providing for proper image orientation, and mirror retainers. All of the components are structured to snap-fit together such that the optical components of the assembly are automatically nominally positioned when placed connected in the housing....