Optical filter element, optical filter, and method of...

Details Optical filter element, optical filter, and method of... Optical filter element, optical filter, and method of...

2011-05-31

2011-05-31

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Light interference

Produced by coating or lamina

C359S587000, C359S589000, C359S590000

Reexamination Certificate

active

07952804

ABSTRACT:
There is disclosed an optical filter element that includes a translucent substrate; a laminated film formed by laminating plural thin films including a metal film on the translucent substrate; and a parallel structure in which parallel concave-shaped defective parts are periodically provided at a pitch shorter than a transmitted light wavelength. The parallel structure is formed in at least a part of the laminated film.

REFERENCES:
patent: 2004/0174475 (2004-09-01), Lan et al.
patent: 2007/0002414 (2007-01-01), Stuck et al.
patent: 07-270613 (1995-10-01), None
patent: 2000-356768 (2000-12-01), None
patent: 2004-341506 (2004-12-01), None
patent: 2005-026567 (2005-01-01), None

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