Movement controlling device

Details Movement controlling device Movement controlling device

1992-06-10

1994-05-17

Gellner, Michael L.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 58, 355243, G03B 2734

Patent

active

053132505

ABSTRACT:
A variable power optical system having a mechanical system capable of moving a lens holder and a mirror holder having a predetermined relationship. A driving force moves the lens holder and the mirror holder. The movement of the mirror holder is controlled so as to control the magnification power of the optical system. The present optical system permits a widened power range to be employed without making the total capacity of a machine large.

REFERENCES:
patent: 4322159 (1982-03-01), Takahashi et al.
patent: 4420248 (1983-12-01), Ogawa et al.
patent: 4557594 (1985-12-01), Negoro
patent: 4571064 (1986-02-01), Hayashi et al.
patent: 4800414 (1989-01-01), Takeda

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