Multi-wavelength imaging pyrometer
First Claim
1. Apparatus for non-contact measurements of temperature and emissivity profiles of a radiant target with unknown spectral emissivity comprising:
- an assembly of "N" multiple narrow-band optical filters, where "N" is an integer greater than 2;
an array of photodetectors sensitive to the transmission bands of the optical filters;
optical means for imaging the radiant target through said assembly of "N" multiple narrow-band optical filters onto said array of photodetectors for producing multi-wavelength images of the radiant target onto said array of photodetectors sensitive to the transmission bands of the optical filters; and
means for processing the detected multi-wavelength images of the radiant target using a model of the radiant target for determining the temperature and emissivity profiles on the surface of the radiant target.
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Accused Products
Abstract
An apparatus and method for non-contact real-time measurements of temperature and emissivity profiles of radiant targets with unknown spectral emissivity. The selected points or regions on the radiant target are imaged onto an array of photodetectors through an assembly of narrow-band optical filters. Produced multi-wavelength images of the radiant target are processed by the computer workstation and 1D or 2D temperature and emissivity profiles are obtained by means of the curve-fitting of radiometric model of imager sensor response to measured response and performing spatial interpolation of the results. Method for calibration of said apparatus by means of curve-fitting of radiometric model of the apparatus to sensor responses obtained by imaging pre-calibrated blackbody. Method for compensation for inherent non-linearities of pyrometer response.
111 Citations
22 Claims
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1. Apparatus for non-contact measurements of temperature and emissivity profiles of a radiant target with unknown spectral emissivity comprising:
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an assembly of "N" multiple narrow-band optical filters, where "N" is an integer greater than 2; an array of photodetectors sensitive to the transmission bands of the optical filters; optical means for imaging the radiant target through said assembly of "N" multiple narrow-band optical filters onto said array of photodetectors for producing multi-wavelength images of the radiant target onto said array of photodetectors sensitive to the transmission bands of the optical filters; and means for processing the detected multi-wavelength images of the radiant target using a model of the radiant target for determining the temperature and emissivity profiles on the surface of the radiant target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification