Active optical filter controlled by magnetic field

Details Active optical filter controlled by magnetic field Active optical filter controlled by magnetic field

2008-12-30

2010-11-30

Ben, Loha (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S282000, C359S283000, C359S287000, C359S298000, C385S006000

Reexamination Certificate

active

07843622

ABSTRACT:
An active optical filter transmits or blocks light according to whether or not a magnetic field is applied, and functions as an optical filter transmitting light having a predetermined wavelength when light is transmitted according to a magnetic field. The active optical filter includes: an optical filter layer for transmitting or blocking light according to whether or not a magnetic field is applied; and a magnetic field applying unit surrounding the optical filter layer for applying a magnetic field to the optical filter layer. The optical filter layer has a multi-layer thin layer structure which is formed of two kinds of thin layers having different respective refractive indices and sequentially and periodically stacked on a substrate.

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patent: 6520246 (2003-02-01), Poloni et al.
patent: 6796362 (2004-09-01), Lombard et al.
patent: 7550679 (2009-06-01), Wershoven

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