Acousto-optic tunable filter system which radiates a source ligh

Details Acousto-optic tunable filter system which radiates a source ligh Acousto-optic tunable filter system which radiates a source ligh

1997-12-24

2000-01-11

Dang, Huang Xuan

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359305, G02F 111

Patent

active

060142456

ABSTRACT:
In a non-collinear type acousto-optic tunable filter, a source light beam is made off-perpendicularly incident on a crystal body, so that the cross section of the source light beam is narrowed within the crystal body. As a result, the receiving angular aperture becomes large to increase the amount of light collected into the crystal body. Consequently, highly accurate spectrometry can be performed even if the intensity of the source light beam is low. Further, the non-diffraction part of the crystal body can be eliminated by the off-perpendicular incidence of the source light beam, so that the sufficient diffraction length of acoustic and optic waves can be obtained.

REFERENCES:
patent: 5841577 (1998-11-01), Wachman et al.

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