Lens position control device

Details Lens position control device Lens position control device

1989-05-31

1990-08-21

Arnold, Bruce Y.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

354400, 358227, G02B 1500

Patent

active

049500546

ABSTRACT:
A position control device for a lens system, the system including a variator and a compensator the latter of which also serves as the focusing lens, comprising device for detecting the degree of focus, device for detecting the positions of the variator and compensator, device for controlling movement of the compensator in accordance with at least the output of the position detecting device, and device responsive to occurrence of an out-of-focus state for correcting the manner in which the control device controls movement of the compensator, whereby the correcting device varies the manner between when the variator moves from the telephoto side to the wide-angle side and when from the wide-angle side to the telephoto side.

REFERENCES:
patent: 4735494 (1988-04-01), Makino et al.
patent: 4777504 (1988-10-01), Akada et al.
patent: 4783676 (1988-11-01), Aihara et al.
patent: 4816856 (1989-03-01), Hamada et al.

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