Acousto-optic spectrometer/polarimeter

Details Acousto-optic spectrometer/polarimeter Acousto-optic spectrometer/polarimeter

1990-10-12

1992-07-21

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

358305, G01N 2100, G01J 3447

Patent

active

051317427

ABSTRACT:
An acousto-optic spectrometer/polarimeter for analyzing an incident broad-band beam including an acousto-optic tunable filter (AOTF) for separating the incident broad-band beam into a diffracted extraordinary narrow-band beam, a diffracted ordinary narrow-band beam, and at least one undiffracted broad-band beam; first, second and third detectors respectively positioned to respectfully receive at least a portion of the diffracted extraordinary narrow-band beam, the diffracted ordinary narrow broad-band beam and the at least one undiffracted broad-band beam, and to respectively provide first, second and third signals based thereon; a subtracter for providing a polarimeter output by taking the difference between the first and the second signals; and an adder for providing a spectrometer output by adding the first and the second signals. The acousto-optic spectrometer/polarimeter according to the present invention allows broad-band imaging, spectroscopy and polarimetry to be performed simultaneously and through the same optical aperture.

REFERENCES:
patent: 3631254 (1969-12-01), Covault
patent: 4115006 (1978-09-01), Reymond et al.
patent: 4575186 (1986-03-01), Gottlieb et al.
patent: 4644267 (1987-02-01), Tsui et al.
patent: 4653869 (1987-03-01), Gottlieb et al.

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