1988-03-29
1989-08-08
Corbin, John K.
350 16, G02C 522, G02C 528
Patent
active
048546704
ABSTRACT:
A thin-film optical interference filter designed and manufactured to have high transmission of blue light and high reflectance of infrared light. The novel feature of this filter rests in the thin-film layer design at the top and bottom of a quarterwave stack and the manufacturing technique by which this thin-film design is deposited. The thin-film layer design suppresses the so called halfwave holes which occur at wide angles of incidence of the incoming light. This desirable effect is achieved by the proper layer thickness and refractive index control in the manufacturing process.
REFERENCES:
patent: 2412496 (1946-12-01), Dimmick
patent: 4461532 (1984-07-01), Sato et al.
patent: 4504109 (1985-03-01), Taga et al.
patent: 4556599 (1985-12-01), Sato et al.
Corbin John K.
GTE Products Corporation
Romanow Joseph S.
Ryan Jay
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