Light shielding structure of an optical device

Details Light shielding structure of an optical device Light shielding structure of an optical device

2009-02-11

2010-11-16

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With light limiting or controlling means

C359S739000

Reexamination Certificate

active

07835088

ABSTRACT:
A light shielding structure of an optical device, includes a plurality of optical elements arranged at different positions in an optical axis direction. The light shielding structure includes at least one annular light shielding member positioned between two of the optical elements to shield harmful light, and a plurality of springs held between the two optical elements to be resiliently deformable in the optical axis direction. The springs include at least two springs, one of which is held between one of the two optical elements and the annular light shielding member while the other of the two springs is held between the other of the two optical elements and the annular light shielding member. The annular light shielding member is supported between the two optical elements in a balanced state between the spring forces of the plurality of springs.

REFERENCES:
patent: 2001/0017736 (2001-08-01), Nomura et al.
patent: 2004/0160678 (2004-08-01), Nomura et al.
patent: 2004/0160679 (2004-08-01), Nomura et al.
patent: 2006/0193625 (2006-08-01), Nomura
patent: 2006/0274430 (2006-12-01), Nomura et al.
patent: 2007/0019938 (2007-01-01), Nomura
patent: 2411490 (2005-08-01), None
patent: 2000-121903 (2000-04-01), None
patent: 2004-20774 (2004-01-01), None
English language Abstract of JP 2000-121903, Apr. 28, 2000.
English language Abstract of JP 2004-20774, Jan. 22, 2004.
U.S. Appl. No. 12/369,161 to Nomura et al., filed on Feb. 11, 2009.
U.S. Appl. No. 12/369,194 to Nomura et al., filed on Feb. 11, 2009.

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