Device for exposing discrete portions of a photosensitive surfac

Details Device for exposing discrete portions of a photosensitive surfac Device for exposing discrete portions of a photosensitive surfac

1986-02-28

1987-03-31

Griffin, Donald A.

G03B 4100

Patent

active

046538828

ABSTRACT:
The device comprises a lamp which directs a light beam to a photosensitive surface through symbols contained on a rotating disc, along a straight axis without changement of direction, the distance between the lamp and the sensitive surface being maintained constant. The device further comprises an enlarging objective movable along the optical axis and allowing to vary continuously the size of the projection of the symbols between two limits, namely between about 0.5 and 1.5 times the normal size of the symbols.

REFERENCES:
patent: 3330182 (1967-07-01), Gerber et al.
patent: 3686675 (1972-08-01), Faul et al.
patent: 3721164 (1973-03-01), Kuttigen et al.
patent: 4465350 (1984-08-01), Westerberg

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