Photocopying – Contact printing – Light boxes
Patent
1987-01-12
1988-08-16
Corbin, John K.
Photocopying
Contact printing
Light boxes
354400, 355 58, G02B 711
Patent
active
047639997
ABSTRACT:
In a zoom lens assembly, an objective lens is changed in focal length by moving first and second lens groups relative to each other and is focused by moving the first lens group relative to the second lens group. A zooming cam has respective camming surfaces corresponding to the first and second lens groups for moving the first and second lens groups relative to each other to change the focal length of the objective lens. A focusing cam is operatively associated with the camming surface corresponding to the first lens group for moving the first lens group relative to the second lens group to focus the objective lens in accordance with a change in the focal length of the objective lens.
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Ben Loha
Corbin John K.
Eastman Kodak Company
Fields Roger A.
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