Light shield sheet, optical apparatus, and method of...

Details Light shield sheet, optical apparatus, and method of... Light shield sheet, optical apparatus, and method of...

2005-08-05

2008-11-25

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With light limiting or controlling means

C359S739000, C359S793000

Reexamination Certificate

active

07457052

ABSTRACT:
A light shield sheet has an aperture that restricts a range of light transmission. In the light shield sheet, the thickness of the inner circumference in the periphery of the aperture is smaller than the thickness of the outer circumference.

REFERENCES:
patent: 6429422 (2002-08-01), Bohn
patent: 6597401 (2003-07-01), Maruyama
patent: 6802420 (2004-10-01), Fukugawa et al.
patent: 7221524 (2007-05-01), Ye et al.
patent: 7231143 (2007-06-01), Toji
patent: A-09-096850 (1997-04-01), None
patent: A-2003-270506 (2003-09-01), None

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