Method of and apparatus for imaging surface of object at high te

Details Method of and apparatus for imaging surface of object at high te Method of and apparatus for imaging surface of object at high te

1984-09-21

1987-02-03

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250341, 250554, G01N 2100

Patent

active

046410368

ABSTRACT:
A method of imaging the surface of an object at high temperature includes the steps of: irradiating the surface of a high-temperature object with two different kinds of pulses of monochromatic light of a fundamental wave and a harmonic thereof; passing the reflected light from the surface of the object through both an interference filter which allows only the two different kinds of monochromatic light to pass and a high-speed optical switch thereby to remove any background light component; drawing out only the reflected light of the pulses and leading the same to an image generating mechanism where it is converted into an image; and controlling the voltage applied to the high-speed optical switch thereby to adjust the mixing ratio between two wavelengths. Also disclosed is an apparatus for imaging the surface of an object at high temperature which includes: a light pulse generator provided such as to be opposed to high-temperature object; and an interference filter, a half-mirror, a high-speed optical switch and an image generating mechanism which are successively disposed on the optical axis of the reflected light from the object.

REFERENCES:
patent: 4129780 (1978-12-01), Laughlin
patent: 4338030 (1982-07-01), Loos

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