Illumination system utilizing two opposing DC lamps with an opti

Details Illumination system utilizing two opposing DC lamps with an opti Illumination system utilizing two opposing DC lamps with an opti

1976-11-01

1978-04-25

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

G03B 2754

Patent

active

040860108

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.

REFERENCES:
patent: 3062108 (1962-11-01), Mayo
patent: 3330180 (1967-07-01), Ferguson et al.
patent: 3575502 (1971-04-01), Eppe
patent: 3669538 (1972-06-01), Fowler
patent: 3698815 (1972-10-01), Thomas
patent: 3884576 (1975-05-01), Mochimaru et al.

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