Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1987-04-08
1988-11-29
McGraw, Vincent P.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
356439, G01N 2115, G01N 2131
Patent
active
047877502
ABSTRACT:
An across-the-stack gas analyzing spectrometer has a radiation source assembly including a cylindrical tube 22 having, in succession from its outer end toward the stack end a radiation emission assembly 28, a first lens assembly 30, and an AOTF assembly, all in optically aligned arrangement because of the circular perimeter of the elements in the circular tube, the arrangement also including a projecting second lens nozzle 98 received in an air window assembly 104 which forms a venturi with the second lens, the air window having a ball joint arrangement 120 for easy alignment of the directed beam, and also including a small diameter air window tube 142 through which clean air is directed into the stack through a larger diameter stack opening.
REFERENCES:
patent: 2498506 (1950-02-01), Ramser
patent: 4422154 (1983-12-01), Smithline et al.
patent: 4657386 (1987-04-01), Suarez-Gonzalez et al.
Gottlieb et al., "Programmable Acousto-Optic Filter a Device for Multispectral Optical Processing", SPIE vol. 232, 1980, Int. Optical Computing Conf., (1980) pp. 33-41.
Danley William J.
McIntyre William H.
Nelson Robert L.
Hawranko G. E.
McGraw Vincent P.
Westinghouse Electric Corp.
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