Stable two-channel, single-filter spectrometer

Details Stable two-channel, single-filter spectrometer Stable two-channel, single-filter spectrometer

1976-05-18

1978-03-28

McGraw, Vincent P.

Optics: measuring and testing

Optical pyrometers

Plural color responsive

73355R, 356 75, 356178, G01J 548, G01J 344

Patent

active

040812154

ABSTRACT:
An instrument to make simultaneous accurate measurements of the intensity of light in each of two (or more) spectral channels using a single interference filter employs mirrors or prisms to break up the observed light beam into two (or more) beams, propagating in slightly different directions. The angle dependence of the filter spectral passband provides two distinct spectral channels which are focused onto separate detector elements. Advantages of this instrument are illustrated by its application for remote point Raman temperature measurements in hot gases.

REFERENCES:
patent: 2941444 (1960-06-01), Frykman
patent: 3909132 (1975-09-01), Barrett
patent: 3986775 (1976-10-01), Chang et al.
M. Lapp, "Flame Temperature From Vibrational Raman Scattering", pp. 107-145 (Plenum Press, 1974).
M. E. Mack, "Remote Raman Temperature Measurement With a Dye Laser", Laser Raman Gas Diagnostics, pp. 353-359 (Plenum Press, 1974).
M. Lapp et al., "Vibrational Raman Scattering Temp. Meas.", Optical Communications, pp. 195-200 (Oct. 1973).
M. Lapp et al., "Raman Scattering From Flames", Science, pp. 1112-1115 (Mar. 10, 1972).
D. Hartley et al., "Physics in Combustion Research", Physics Today, pp. 36, 37, 39-41, 43, 46, 47 (Dec. 1975).

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