Dielectric optical filter with absorptive metal layer

Details Dielectric optical filter with absorptive metal layer Dielectric optical filter with absorptive metal layer

1998-03-12

2000-03-07

Spyrou, Cassandra

Optical: systems and elements

Light interference

Produced by coating or lamina

359589, G02B 530

Patent

active

060348208

ABSTRACT:
An optical filter, for absorbing a part of the optical signals with a central wavelength .lambda. and restricting the intensity of the transmitted light, includes a dielectric block with a high refractive index, a metal film, and a dielectric block with a low refractive index deposited on a substrate in that order in the direction of the incident light.

REFERENCES:
patent: 3649359 (1972-03-01), Apfel et al.
patent: 3679291 (1972-07-01), Apfel et al.
patent: 4009453 (1977-02-01), Mahlein
patent: 5140457 (1992-08-01), Letter
patent: 5337191 (1994-08-01), Austin
patent: 5583704 (1996-12-01), Fujii

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