Radiant energy – Photocells; circuits and apparatus – Flame light source
Patent
1989-04-14
1990-07-03
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Flame light source
250228, 356315, 356236, G01J 100, G01J 330
Patent
active
049393766
ABSTRACT:
A light collection device for use in a flame emission detection system such as an on-line, real-time alkali concentration process stream monitor is disclosed which comprises a sphere coated on its interior with a highly diffuse reflective paint which is positioned over a flame emission source, and one or more fiber optic cables which transfer the light generated at the interior of the sphere to a detecting device. The diffuse scattering of the light emitted by the flame uniformly distributes the light in the sphere, and the collection efficiency of the device is greater than that obtainable in the prior art. The device of the present invention thus provides enhanced sensitivity and reduces the noise associated with flame emission detectors, and can achieve substantial improvements in alkali detection levels.
REFERENCES:
patent: 3137759 (1964-06-01), Isreeli
patent: 3692415 (1972-09-01), Shiller
patent: 4466943 (1984-08-01), Murase et al.
patent: 4487504 (1984-12-01), Goldsmith
patent: 4616137 (1986-10-01), Goff et al.
patent: 4746214 (1988-05-01), Akiyama et al.
Chase et al., "New Scanner Uses Visible Light to Detect Flame", Power Engineering, 4/82, pp. 68-71.
Hensel et al., "On-Line, Real-Time Alkali Monitor for Process Stream Analysis", Rev. Sci. Instrum., 58(9): 1647-1654 (1987).
Wolpert, "Unraveling the Mystery of Integrated Spheres", Electro Optics.
Logan Ronald G.
Pineault Richard L.
Woodruff Stephen D.
Constant Richard E.
Hamel Stephen D.
Messinger Michael
Moser William R.
Nelms David C.
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