Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1988-11-04
1990-06-05
Laroche, Eugene R.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350286, 356326, G02B 2712, G02B 504, G01J 328
Patent
active
049308653
ABSTRACT:
An optical transmission spectrometer for transmission measurements of absorbing and scattering samples includes light sources mounted parallel to each other in a holder. The beams of light eminating from the light sources are directed through a beam-combiner. The beam-combiner includes a first refractive surface at an angle of incidence of 45.degree.. The first refractive surface refracts light toward a common axis. The beam-combiner includes a second refractive surface parallel to the first refractive surface for refracting the beam of light along a common axis parallel to the original direction of the beam of light. The beam-combiner can include additional refractive surfaces for other beams of light to combine the beams of light into a primary beam. The includes a collimating tube extending along the common axis for baffling stray light and directing the primary beam through a sample. A second collimating tube is provided on the side of the sample opposite the first collimating tube for baffling stray light passing through the sample. The second collimating tube directs the primary beam to a detector package mounted in a holder, where the detector viewing area of the sample is limited to that of the primary beam.
REFERENCES:
patent: 2090398 (1937-08-01), Hoyt
patent: 2098767 (1937-11-01), Thomas
patent: 4637717 (1987-01-01), Brudnoy
patent: 4772094 (1988-09-01), Sheimann
Coe Roger N.
Kachmarik Ronald M.
LaRoche Eugene R.
Miles Inc.
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