Lens control device

Details Lens control device Lens control device

1995-04-06

1998-07-28

Garber, Wendy

Television

Camera, system and detail

Optics

348335, A04N 5235

Patent

active

057868530

ABSTRACT:
A lens control device includes a variator lens for zooming, a focusing lens for compensating for a focus plane position change associated with the variator lens' movement, a conversion lens for modifying the focal length determined by the variator lens, a driver for driving the variator lens and the focusing lens, and a control circuit for changing a driving speed of the variator lens between when the conversion lens is mounted and when the conversion lens is not mounted.

REFERENCES:
patent: 4735494 (1988-04-01), Makino et al.
patent: 4994842 (1991-02-01), Itoh et al.
patent: 5028773 (1991-07-01), Hata
patent: 5144491 (1992-09-01), Ushiro et al.
patent: 5204710 (1993-04-01), Tsukamoto et al.

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