An optical system is provided which in conjunction with a light source is used to illuminate an object whose reflective properties are required to be measured. The optical system comprises a condenser lens having first and second spherical surfaces, the first having an annular reflective surface on its periphery and the second an annular reflective surface at its central portion. A positive lens is mounted in the aperture of the reflective annular surface on the second surface of the condenser l...

For use in a document reproducing apparatus such as a planetary microfilmer, apparatus is disclosed which compensates for Cos.sup.4 .theta. light intensity fall-off of an illuminated document as projected by an objective lens to thereby produce a uniform exposure of an image of the document to be photographed. The apparatus includes a source of illumination, a light reflecting surface for reflecting light from the source off a document to be photographed to vary the intensity of illumination of ...

An illumination system having four lamps arranged orthogonally around a subject to be illuminated with each lamp positioned outside the corresponding adjacent edge of the subject. A reflector system having a cylindrical surface and a plurality of flat reflectors are associated with each of the lamps for directing light rays to the subject from the adjacent edge thereof to the edge opposite thereto.

An illumination device for use in a slit exposure system for illuminating a document located on a document table. The illumination device has a light source with an elongated shape and a reflector surrounding a portion of the periphery of the light source and designed to reflect a light emitted from the light source toward the document. The reflector has a plurality of cylindrical reflecting surfaces. Each of the surfaces is designed to reflect while collimating a light virtually emitted from a ...

An illumination module comprising a housing having one or more cavities, each containing a source of illumination such as an incandescent lamp at its closed end. A housing mounting plate containing a window coextensive with the open end of the housing is affixed to the open end of said housing in such a way as to create a slot between the mounting plate and the housing. A movable mask containing one or more apertures to configure and position the light as it leaves the housing through the window...

A scanner has a sensor assembly having a sensor to receive light from an image, and which assembly generates an image signal corresponding to the image, which image signal has a plurality of color channel components representative of different spectral regions. A media holder holds a media carrying the image. An illuminator to illuminate the image of a held media such that light from the image falls on the sensor. The illuminator has a plurality of sets of light emitting elements to provide illu...

Described herein is a method and apparatus for illuminating film containing emissive interlayers wherein dichroic filters are used both to determine the excitation bandwidth for the interlayers and to prevent excitation light entering a conventional color scanner.

An illumination system, particularly adapted to use in hospitals, has an elongated, low-profile fluorescent lighting fixture on the side of and parallel to a track, a reading-examination light mounted on one end of a telescoping boom, the other end of which is swingably connected to a boom mount rotatably carried by a carriage mounted to roll along the track. The lighting fixture includes means for providing low brightness down lighting and higher brightness side lighting. The reading-examinatio...

An illumination device includes plural lamps, a prism, a first lens array, and a second lens array, wherein the first lens array is formed such that images of the lamps are formed a predetermined space apart from each other on a lens, which corresponds to a predetermined lens among plural lenses of a second lens array, by light from the lamps having passed the predetermined lens of the first lens array. All or a part of plural images formed by a lens separate from the predetermined lens of the f...

Light from a LED (point-like light source) is expanded smoothly to a desirable range at a high efficiency by a light flux control member. The light flux control member is provided with a lens portion located at a part corresponding to the LED and a mount portion (body portion) detachably supporting the lens portion. The lens portion has a back face provided with a recess located as to correspond to the LED. The recess expands light from the LED smoothly and efficiently to a broad range, bringing...