Band-ratio radiometer

Details Band-ratio radiometer Band-ratio radiometer

1978-08-02

1980-09-30

McGraw, Vincent P.

Optics: measuring and testing

Optical pyrometers

Plural color responsive

356407, 250227, G01J 560

Patent

active

042252300

ABSTRACT:
A band-ratio radiometer is disclosed which makes use of either a bifurcated or trifurcated fiber optic bundle, over two branches of which the sample radiation is transmitted in different wavelength regions. The third branch may be used to provide illumination of the target area, for aiming purposes, by injecting light at the near end of this branch. By this means, the remote ends of all three bundles may be focussed precisely upon the target area, with no parallax problem. The system avoids the use of conventional optical filters by making use of detectors which are identical in wavelength sensitivity and optical fibers which differ in wavelength transmittance.

REFERENCES:
patent: 3327712 (1967-06-01), Kaufman et al.
patent: 3795918 (1974-03-01), Sunderland

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