Absorption type multi-layer film ND filter and process for...

Details Absorption type multi-layer film ND filter and process for... Absorption type multi-layer film ND filter and process for...

2011-02-22

2011-02-22

Lavarias, Arnel C (Department: 2872)

Optical: systems and elements

Absorption filter

Neutral or graded density

C359S586000

Reexamination Certificate

active

07894148

ABSTRACT:
An absorption type multi-layer film ND filter having a substrate formed of a resin film and on at least one side thereof an absorption type multi-layer film of oxide dielectric film layers and absorption film layers which are alternately wherein the oxide dielectric film layers are each a SiCyOx (0<y≦0.1, 1.5<x<2) film having an extinction coefficient at a wavelength of 550 nm of 0.005 to 0.05, formed by a physical vapor deposition process using a film-forming material composed chiefly of SiC and Si, and the absorption film layers are each a metal film having a refractive index at a wavelength of 550 nm of 1.5 to 3.0 and an extinction coefficient at that wavelength of 1.5 to 4.0, formed by a physical vapor deposition process; an outermost layer of the multi-layer film being one oxide dielectric film layer of SiCyOx.

REFERENCES:
patent: 5715103 (1998-02-01), Amano et al.
patent: 7388723 (2008-06-01), Kunii
patent: 7440204 (2008-10-01), Kunii
patent: 2003/0026014 (2003-02-01), Kunii
patent: 5-93811 (1993-04-01), None
patent: 3359114 (2002-10-01), None
patent: 2003-43211 (2003-02-01), None
patent: 2003-322709 (2003-11-01), None
patent: WO 01/27345 (2001-04-01), None
patent: WO 2004/011690 (2004-02-01), None
patent: WO 2005/047940 (2005-05-01), None

Affiliated with

Also associated with

Rating

Absorption type multi-layer film ND filter and process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Absorption type multi-layer film ND filter and process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absorption type multi-layer film ND filter and process for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2642357