Lens drive controlling apparatus

Details Lens drive controlling apparatus Lens drive controlling apparatus

1991-05-02

1994-02-15

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

35419512, 354400, 348345, G02B 1514

Patent

active

052872238

ABSTRACT:
A lens drive controlling apparatus includes a zooming lens, a focusing lens driven in follow-up relation to a movement of the zooming lens on the basis of a predetermined characteristic, a speed sensor for detecting a driving speed of the zooming lens, and a control circuit for determining a driving speed of the focusing lens on the basis of a detection result provided by the speed sensor.

REFERENCES:
patent: 4896179 (1990-01-01), Watanabe et al.
patent: 4920369 (1990-04-01), Kaneda et al.
patent: 4950054 (1990-08-01), Wada et al.
patent: 4991944 (1991-02-01), Hirao et al.
patent: 5005956 (1991-04-01), Kaneda et al.
patent: 5038163 (1991-08-01), Hirasawa
patent: 5144491 (1992-09-01), Ushiro et al.
patent: 5144492 (1992-09-01), Iijima et al.

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