The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1988
Filed:
Jan. 30, 1987
Jeffrey D Taft, Murrysville Boro, PA (US);
James F Ellison, Pittsburgh, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A method and apparatus for illuminating a target, for example the wall and internal structures of a coal, oil, or gas fired combustion chamber for remote viewing. A coherent light source is used to illuminate the target with illumination of a selected spectral content different from that produced by ambient light resulting from the combustion of the fuel. The coherent light illuminates the target and a narrow band optical filter is placed in front of a viewing camera to filter ambient light but to pass the illuminating source reflected from the target. The coherent light source has a wavelength range of about 422 nm to about 780 nm. Source wavelengths are chosen to be sufficiently long to penetrate particulate laden gases and still be distinguishable from thermal radiation inside the furnace. A human observer may manipulate the laser source and view the target using filter spectacles.