Plastic optical filter

Details Plastic optical filter Plastic optical filter

1995-08-28

1997-03-18

Tucker, Philip

Compositions

Light transmission modifying compositions

252587, 359885, F21V 900, F21V 904

Patent

active

056119658

ABSTRACT:
Disclosed herein is a plastic optical filter which has a combined optical function that it has an effect of effectively blocking or attenuating rays in the wavelength range of a near infrared region and excellent luminosity factor-compensating ability and is provided with an optical low-pass filtering function, and is low in specific gravity and hygroscopicity, free from devitrification with time and easy to conduct its processing or machining and polishing treatment.
This plastic optical filter includes a filter base formed of a plastic material comprising a copolymer obtained by copolymerizing a monomer represented by the following formula I:

REFERENCES:
patent: 5236633 (1993-08-01), Satake et al.
patent: 5237452 (1993-08-01), Okayama et al.
patent: 5354514 (1994-10-01), Satake et al.
patent: 5434709 (1995-07-01), Yamada et al.
patent: 5466755 (1995-11-01), Sakagami et al.
Patent Abstracts of Japan, vol. 015, No. 005 (P-1149), 8 Jan. 1991 of JP-A-02 254401 (Hoya Corp), 15 Oct. 1990.
Patent Abstracts of Japan, vol. 008, No. 117 (P-277), 31 May 1984 of JP-A-59 023306 (Kyowa Gas Kagaku Kogyo KK), 6 Feb. 1984.

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