Light shielding structure of a retractable lens barrel

Details Light shielding structure of a retractable lens barrel Light shielding structure of a retractable lens barrel

2005-07-19

2005-07-19

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S694000, C359S704000, C359S738000

Reexamination Certificate

active

06919995

ABSTRACT:
A light shielding structure of a retractable lens barrel includes a lens system, a lens frame to which a lens group is fixed; at least one movable annular member into which the lens frame is screw-engaged, and which is moved along the optical axis in a predetermined moving manner; a light shield member which is supported by the movable annular member to be movable along the optical axis relative to the movable annular member, and having a rearward movement extremity relative to the movable annular member; and a biasing member which is positioned between the light shield member and the lens frame in a compressed fashion to bias the light shield member toward the rearward movement extremity thereof relative to the movable annular member.

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patent: 2004/0160683 (2004-08-01), Nomura et al.
patent: 2004/0228006 (2004-11-01), Yasutomi et al.

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