Zoom lens for video camera

Details Zoom lens for video camera Zoom lens for video camera

1992-02-03

1993-03-02

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359694, 359823, 359825, G02B 702, G02B 1514

Patent

active

051914786

ABSTRACT:
A zoom lens for a video camera includes a focusing mechanism which is designed to prevent a picked-up image from shaking when the focusing mechanism is operated manually or electrically. In the focusing mechanism, a female helicoid is threadedly fitted on a male helicoid, and a female helicoid holder supports the female helicoid from a lower side of the female helicoid to maintain a proper threaded engagement between the female helicoid and the male helicoid. The female helicoid holder is provided at a lower side of the male helicoid.

REFERENCES:
patent: 4114984 (1978-09-01), Muryoi
patent: 4333712 (1982-06-01), Tomori
patent: 4334737 (1982-06-01), Nozawa et al.
patent: 4488787 (1984-12-01), Osawa
patent: 4759618 (1988-07-01), Kamata

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