Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1979-10-22
1984-01-17
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Illumination systems or details
G03B 2754
Patent
active
RE0314994
ABSTRACT:
[A symmetrical light intensity distribution profile is achieved by placing a pair of similar asymmetrical linear DC gas discharge lamps in parallel position but opposed in polarity. The individual asymmetrical distributions of the lamps combine in a symmetrical total intensity distribution. A desired "butterfly" or other intensity distribution profile can be achieved.] The invention relates to an illumination system which provides nonuniform illumination along an object plane in the dimension of an illumination source which includes two linear lamps. The lamps have their anodes and cathodes connected in reverse fashion relative to each other; each lamp provides its own asymmetrical light output distribution pattern but the resultant output of both lamps is a symmetrical pattern which provides the characteristic nonuniform illumination on the object plane.
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Research Disclosure Item 13517, Jul. 1975, p. 17.
Democrat and Chronicle Rochester N.Y. Newspaper Apr. 30, 1975, Kodak Ektaprint 100.
Kodak Ektaprint 100 Theory Guide Optics and Illumination, Dec. 9, 1974, pp. 1-19.
Kodak Ektaprint 100 Service Manual, p. 62, FIG. 63, 665956-26.
Kodak Ektaprint 100 Service Manual, pp. 10 & 11, FIGS. 14 to 17.
Gallo, Jr. Charles F.
Hammond Thomas J.
Rees James D.
Griffin Donald A.
Xerox Corporation
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