High intensity illumination light table

Details High intensity illumination light table High intensity illumination light table

1978-01-16

1980-09-02

Nelson, Peter A.

Illumination

Display backlight

Lcd backlight

362 33, G09F 1304

Patent

active

042209820

ABSTRACT:
A stereo viewing system including a stereomicroscope, a film advance system and a high intensity illumination light table. The stereomicroscope includes rhomboid arms for positioning the optics over the film to be viewed. The light table includes a light transmitting cover, and a pair of intersecting reflectors, a pair of lamp assemblies and a diffuser, all combined to produce a diffused pair of intersecting annular rings of illumination. Each reflector is a section of a surface of revolution, preferably a section of a paraboloid. The lamp assemblies are mounted relative to the reflectors so that the filament of each lamp is, at least nominally, at the focal point of each parabolic reflector. The diffuser is, preferably, a pair of cylindrical shaped elements each of which is located between a lamp and its respective reflector and surrounds each lamp. The light table also includes a pair of mechanical dimmers and a cooling system.

REFERENCES:
patent: 1277109 (1918-08-01), Patterson
patent: 1403139 (1927-01-01), Verain
patent: 1868521 (1932-07-01), Bucky
patent: 1891498 (1932-12-01), Borden
patent: 2701838 (1955-02-01), Loesch
patent: 3414346 (1968-12-01), Halco
patent: 3463914 (1955-02-01), Lutter
patent: 3529148 (1970-09-01), Stefano et al.
patent: 3920311 (1975-11-01), Tsuda et al.
patent: 3988844 (1976-11-01), Lebow
Richards Corp. Catalog, McLean, Va.

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