Variable focal lens device

Details Variable focal lens device Variable focal lens device

1988-01-21

1989-08-29

Arnold, Bruce Y.

354402, G02B 711

Patent

active

048611468

ABSTRACT:
A variable focal lens device having an optical system comprising a variable power lens group and a focusing lens group disposed on one identical optical axis in which a deviation of a focusing position is resulted with an identical object when the focusing lens group is set at a predetermined focusing position from a nearest position to an infinite position on the optical axis corresponding too an object distance from a nearest distance to an infinite distance and then moving the variable power lens group along the optical axis thereby renewing an entire system focal length of the variable power optical system from a first focal length to a second focal length.

REFERENCES:
patent: 4161756 (1979-07-01), Thomas
patent: 4705380 (1987-11-01), Yamamoto et al.

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