Light intercepting apparatus of lens

Details Light intercepting apparatus of lens Light intercepting apparatus of lens

1990-05-22

1992-05-19

Ben, Loha

Optical: systems and elements

Lens

With support

359611, 359694, 354403, G02B 702

Patent

active

051153505

ABSTRACT:
A light intercepting apparatus provided between a lens barrel which moves in an optical axis direction and a lens holding member which supports the lens barrel so as to slide in the optical axis direction, includes a pair of light intercepting rings which are provided on the lens holding member. Each of the light intercepting rings is made of a flexible material and has a center opening having a diameter that is smaller than an outer diameter of the lens barrel. The inner ends of the light intercepting rings which define the center openings are deformed in opposite directions and brought into contact with an outer peripheral surface of the lens barrel.

REFERENCES:
patent: 3927932 (1975-12-01), Chrosziel
patent: 4275952 (1981-06-01), Uesugi
patent: 4441794 (1984-04-01), Field
patent: 4759618 (1988-07-01), Kamata
patent: 4944030 (1990-07-01), Haraguchi et al.

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