Light exposure apparatus for printing

Details Light exposure apparatus for printing Light exposure apparatus for printing

1974-12-30

1976-10-26

Wintercorn, Richard A.

Photocopying

Contact printing

350167, 355 71, G03B 2702, G02B 2700

Patent

active

039880664

ABSTRACT:
In the apparatus, an image of a mask is printed on a light-sensitive layer while minimizing the debasing influences due to the diffraction occurring on the layer surface as well as due to the standing wave occurring in the layer. This apparatus includes an arrangement such that the rays coming from a light source are collimated and then directed to a fly's eye lens assembly, and the exit rays from this assembly are again collimated to illuminate the mask. The luminous fluxes of parallel rays impinging upon the mask at various angles of incidence remove the influences of diffraction on the image of the mask. Also this apparatus includes a filter removably inserted in the optical path between the light source and the assembly to remove the influence of the standing wave.

REFERENCES:
patent: 3532038 (1970-10-01), Rottmann
patent: 3584948 (1971-06-01), Herriott
patent: 3594081 (1971-07-01), Tschink
patent: 3941475 (1976-03-01), Sheets

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