Automatic variable filters for use in scanned spectrometers and

Details Automatic variable filters for use in scanned spectrometers and Automatic variable filters for use in scanned spectrometers and

1974-01-21

1976-01-06

McGraw, Vincent P.

Optics: measuring and testing

Range or remote distance finding

With photodetection

250226, 324128, 328167, 356 97, G01J 342

Patent

active

039307271

ABSTRACT:
A spectrometer is scanned across a desired frequency range. A selective filter is automatically varied to alter its characteristics according to the spectrometer's scanning rate by a single control voltage; to assure that the filter's characteristics are optimum for both fast and slow scanning rates.
This invention relates to spectrometers and more particularly to apparatus for enabling automatic tracking of filter characteristics during the scanning of a spectrometer.

REFERENCES:
patent: 3409373 (1968-11-01), Matthews
Audio-Spectrum Analyser; Bronzite; Electronic Engineering; Jan. 1968; pp. 27-31.

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