US 5,963,311 AGranted

Surface and particle imaging pyrometer and method of use

AssigneeStratonics, Inc.

InventorsJames E. Craig, Ronald A. Parker, David Y. Lee, Ernesto Hurtado

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Abstract

An optical pyrometer and method of use provides a dual path optical system for processing light from a radiating stationary object or a moving thermal stream. Light is collected by primary optics forming an intermediate image in a plane of a field limiting aperture for establishing a preferred field of view. The light is then split into a pair of complimentary beams with one beam directed through a long wavelength filter and the other directed through a short wavelength filter. Both beams then move through separate secondary optics and are then rejoined and directed as normal non-overlapping and adjacent images onto a digitizing detector for capturing the images. Signals from the detector are handled by a computer where a ratio mapping of pair of signals from corresponding points on the two images is constructed and displayed on a monitor for viewing a temperature map of the object or thermal stream. The temperature of particles in the thermal stream is determined in a similar manner as well as particle velocity and size.

Claims5

Dependent claims

A surface and particle imaging pyrometer device for creating a temperature map of a radiating object, the device comprising:

a dual path optical system for processing light from the radiating object, the light being collected by a primary lens means forming an intermediate image in a plane of a field limiting means for establishing a field of view, the light thence being split into A and B complimentary beams by a beam splitter means;
beam A being directed through a long wavelength filter means, a long wavelength secondary lens means and thence is directed to a beam joining means;
beam B being directed through a short wavelength filter means, a short wavelength secondary lens means and an image adjustment means and thence is directed to the beam joining means;
the adjustment means for correcting size, positional and rotational differences between the images of beam A and beam B;
the beam joining means directing the beams A and B as non-overlapping and adjacent, equally sized normally incident images on a digitizing detector means thereby producing output signals for each of a plurality of points in each of the images;
a processor circuit forming a numerical ratio for each of a plurality of corresponding pairs of output signals, each said ratio corresponding to the temperature of each of the points of the radiating object;
a monitor means displaying the numerical ratios as a temperature map of the radiating object.

4 more elements

Dependencies are inferred from the claim text.