Acousto-optic spectral manipulator

Details Acousto-optic spectral manipulator Acousto-optic spectral manipulator

1994-02-25

1995-07-18

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356334, G01J 318

Patent

active

054346665

ABSTRACT:
A spectrometer is adapted to observe discrete wavelengths or spectral regions of a sample. The spectrometer includes a light source having spectral characteristics depending on the presence of a sample. A disperser consists of a chamber housing a diffraction grating in spaced relation to the light source and an entrance slit associated with the chamber for directing light from the source in a light path to be dispersed by the grating. An acousto-optic device is mounted in the chamber in the light path so that light traverses the device. A power supply applies an acoustic frequency to the acousto-optic device to set up a variation in refractive index within the acousto-optic device to deflect traversing light. A detector associated with the chamber is positioned relative to the grating to sense the presence of light where it appears after dispersion and to rapidly detect discrete wavelengths or spectral regions of the light.

REFERENCES:
patent: 4028636 (1977-06-01), Hughes
patent: 4120586 (1978-10-01), Lessner
patent: 5039855 (1991-08-01), Kemeny et al.
patent: 5120961 (1992-06-01), Levin et al.
patent: 5131742 (1992-07-01), Schaff
patent: 5216484 (1993-06-01), Chao et al.

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