Lens hood assembly for zoom lens

Details Lens hood assembly for zoom lens Lens hood assembly for zoom lens

1990-11-15

1994-05-17

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359693, 359694, 359696, 359700, 359701, 359705, G02B 1500

Patent

active

053133293

ABSTRACT:
A lens hood assembly is provided for use with a zoom lens having a group of variable power lenses for varying focal length, the assembly comprising a lens hood which is adapted to be moved along the optical axis direction of the zoom lens and which is provided, on its front end, with an incident light restriction wall with a center opening through which incident light passes into the zoom lens, said lens hood being associated with the zooming operation of the zoom lens, wherein the lens hood is adapted to be moved forwardly and rearwardly at the long focal length and the short focal length of the zoom lens, respectively.

REFERENCES:
patent: 4002402 (1977-01-01), Mito
patent: 4346967 (1982-08-01), Komoto et al.
patent: 4472032 (1984-09-01), Kamata et al.
patent: 4576446 (1986-03-01), Kamata
patent: 4759618 (1988-07-01), Kamata
patent: 4911542 (1990-03-01), Nishio et al.

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