Imaging system including a segmented filament light source with

Details Imaging system including a segmented filament light source with Imaging system including a segmented filament light source with

1987-03-05

1988-01-12

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

350628, 355 1, 362 16, G03B 2754

Patent

active

047194936

ABSTRACT:
The output of a segmented filament lamp is smoothed and made more uniform by placing a reflector assembly adjacent the lamp, the reflector assembly comprising a plurality of joined specular hybrid cylindrical/roof mirror segments. Each segment is located so as to reflect light from a portion of each filament back into the filament plane to form an image of each filament in interfilament space. The lamp output thus appears as a uniform and constant source. This type of improved filament lamp is especially useful in conjunction with an imaging system which requires a very uniform light level at a projection lens or at the surface of a document platen.

REFERENCES:
patent: 3763348 (1973-10-01), Costello
patent: 4194385 (1980-03-01), Shiode
patent: 4239369 (1980-12-01), English et al.
patent: 4300831 (1981-11-01), Isago
patent: 4517630 (1985-05-01), Dieffenbach et al.
patent: 4682885 (1987-07-01), Torigoe
"Copier Illumination System", Maddox et al; IBM-TDB, vol. 20, #2, Jul. 1977, pp. 488-489.

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