Faraday rotator with metal reflection film

Optical: systems and elements – Polarization without modulation – Depolarization

Reexamination Certificate

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C359S280000, C359S282000, C359S324000, C385S011000

Reexamination Certificate

active

07050231

ABSTRACT:
A Faraday rotator of multilayer film type is provided which can achieve excellent optical characteristics with a reduced number of layers. In the Faraday rotator, a metal reflection film, a periodic dielectric multilayer film made of silicon dioxide SiO2and tantalum pentoxide Ta2O5, a magneto-optical thin film, and another periodic dielectric multilayer film made of tantalum pentoxide Ta2O5and silicon dioxide SiO2is formed sequentially. Light incident on a polarizer goes therethrough, is reflected at the metal reflection film while traveling trough the periodic dielectric multilayer films, and goes through an analyzer to exit out.

REFERENCES:
patent: 4195908 (1980-04-01), Kestigian et al.
patent: 4525028 (1985-06-01), Dorschner
patent: 5521759 (1996-05-01), Dobrowolski et al.
patent: 5920420 (1999-07-01), Ishikura et al.
patent: 5920538 (1999-07-01), Il'Yashenko
patent: 6952300 (2005-10-01), Levy
patent: 2005/0018327 (2005-01-01), Okubo et al.

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