Shock resistant lens device with zoom and macrofocusing controls

Details Shock resistant lens device with zoom and macrofocusing controls Shock resistant lens device with zoom and macrofocusing controls

1978-06-13

1980-04-22

Henry, Jon W.

G02B 710

Patent

active

041992270

ABSTRACT:
A lens barrel containing at least first and second movable lens groups and an operating member for shifting the movable lens groups along the optical axis includes a helicoid cylinder interposed between a first movable lens frame which supports the first movable lens group, and a fixed cylinder or a member whose movement relative to the fixed cylinder along the optical axis is prevented, whereby a shock externally imparted to the first movable lens frame is transmitted through the helicoid cylinder only to the fixed cylinder.

REFERENCES:
patent: 3752565 (1973-08-01), Nagashima
patent: 3889282 (1975-06-01), Hashimoto
patent: 3944340 (1976-03-01), Hashimoto

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