Lens drive controlling apparatus

Details Lens drive controlling apparatus Lens drive controlling apparatus

1993-06-24

1996-10-29

Phan, James

Optical: systems and elements

Lens

With variable magnification

348345, 396 79, 396 86, 396135, G02B 1514

Patent

active

055702368

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: 4920369 (1990-04-01), Kaneda et al.
patent: 4935763 (1990-06-01), Itoh et al.
patent: 4950054 (1990-08-01), Wada et al.

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