Focal point adjusting device for zoom lens

Details Focal point adjusting device for zoom lens Focal point adjusting device for zoom lens

1994-06-24

1995-12-12

Hayes, Monroe H.

Optical: systems and elements

Prism

With reflecting surface

354286, 359695, G03B 118

Patent

active

054754577

ABSTRACT:
A zoom lens having a plurality of movable lens groups, and an apparatus which is used to adjust the position of the rearmost lens group of the plurality of movable lens groups in the optical axis direction upon assembly of the zoom lens, so that a focal point of the zoom lens does not deviate upon zooming.

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patent: 5086312 (1992-02-01), Tanaka et al.
patent: 5181144 (1993-01-01), Shirie et al.

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