Zoom lens apparatus

Details Zoom lens apparatus Zoom lens apparatus

1992-06-16

1993-08-31

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

359700, 359704, 35419512, G02B 1514

Patent

active

052414221

ABSTRACT:
A zoom lens apparatus which is superior in sound insulating and dust-proof properties and is easy to handle in transportation, storage and so forth. A lens system including a zoom lens set, a focusing lens set and an iris disposed on a single optic axis, a zoom lens driving section composed of a motor, a ball screw, a lens holding member, a nut member and so forth for driving the zoom lens, a focusing lens driving section composed of a guide rod, a lens holding member, a movable coil, an outer yoke, magnets and so forth for driving the focusing lens, and an iris motor for opening and closing the iris are accommodated in the housing having a substantially rectangular outer profile.

REFERENCES:
patent: 4799073 (1989-01-01), Asano et al.
patent: 4948235 (1990-08-01), Akitake
patent: 4971427 (1990-11-01), Takamura et al.
patent: 5177638 (1993-01-01), Emura et al.

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