Optics: measuring and testing – By shade or color – With color transmitting filter
Patent
1993-10-13
1996-05-07
Evans, F. L.
Optics: measuring and testing
By shade or color
With color transmitting filter
356416, 356344, 250226, 359589, 359634, G01N 2164, G02B 528
Patent
active
055151698
ABSTRACT:
A spectral wavelength discrimination system and method for using are provided which allows the wavelength of a beam of radiation to be accurately determined using compact inexpensive optics and electronics. The system is particularly useful for identifying the emission wavelength of a multi-component marker system which includes a plurality of components having different wavelength ranges. The system comprises a wavelength selective beamsplitter, termed a Linear Wavelength Filter, that directs predetermined fractions of the beam at each wavelength into each of two output beams. The intensities of these output beams are measured. The measurements and selected system parameters, including the beamsplitter spectral characteristics and the detector sensitivity characteristics are used in a special algorithm for performing Fourier based wavelength-dispersive analysis. The unique solution of the Fourier based analysis is the wavelength of the beam of radiation. The system employs various optical components and structures to achieve the desired spatial resolution and sensitivity. Multiple channel devices and other special configurations are also described.
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Cargill Robert L.
Gombocz Erich
Swaby Basil
Zanelli Claudio I.
Evans F. L.
Labintelligence Inc.
Optical Coating Laboratory, Inc.
Rowland Bertram I.
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