Optical: systems and elements – Glare or unwanted light reduction – Barrel end or lens mount shade
Reexamination Certificate
2006-08-22
2006-08-22
Dunn, Drew A. (Department: 2872)
Optical: systems and elements
Glare or unwanted light reduction
Barrel end or lens mount shade
C359S601000, C359S612000
Reexamination Certificate
active
07093944
ABSTRACT:
A light shielding structure of a lens barrel including an inner ring and an outer ring, wherein the inner ring includes a through cutout portion, the light shielding structure including an inner flange wall provided with the inner ring; a first annular groove formed on an inner surface of the inner flange wall; a second annular groove formed on an inner peripheral surface of the outer ring; and a light shield ring, wherein the light shield ring includes a cylindrical portion centered about the optical axis, and an outer flange portion which extends radially outwards from a rear end of the cylindrical portion so that the cylindrical portion and the outer flange portion and inserted into the first and second annular grooves, respectively.
REFERENCES:
patent: 6437924 (2002-08-01), Azegami
patent: 2001-215381 (2001-08-01), None
Dunn Drew A.
Greenblum & Bernstein P.L.C.
PENTAX Corporation
Pritchett Joshua L.
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