Laser intensity monitoring apparatus with metallic thin film mas

Details Laser intensity monitoring apparatus with metallic thin film mas Laser intensity monitoring apparatus with metallic thin film mas

1992-02-28

1994-12-06

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1966

Patent

active

053715926

ABSTRACT:
The present invention relates to a laser intensity monitor. Specifically the laser intensity monitor uses a black chrome metallic, non-light transmissive mask deposited on an optically transparent glass or sapphire window. The mask has an aperture there through. The mask is positioned on the window in such a manner that only the TEM.sub.00 mode of a counter-rotating laser beam is allowed to pass through the aperture of the mask and the window to strike a photodetector.

REFERENCES:
patent: 4152072 (1979-05-01), Hutchings
patent: 4514832 (1985-04-01), Vescial
patent: 4676643 (1987-06-01), Vescial
patent: 4871253 (1989-10-01), Killpatrick et al.

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