Television – Special applications – Object or scene measurement
Patent
1997-03-03
1999-09-07
Chin, Tommy P.
Television
Special applications
Object or scene measurement
356345, 356368, H04N 576
Patent
active
059494808
ABSTRACT:
A method for obtaining spectral radiation data for points in a field of view utilizes a broad band variable filter to produce different intensity distributions on a photocell array. The array is in the focal plane of a camera and photocell locations correspond to points in the field of view. The variable filter has a sequence of optical train elements comprised of a first linear polarizer, a body of optically active material, a retarder and a second linear polarizer. A series of radiance measurements are taken at each photocell of the array and at least one of the optical train components is repositioned between measurements. For each photocell, a collection of photocell values is stored in a computer memory and is converted to a system of linear equations. Intensities for spectral components of light incident thereon are derived for each photocell. The method can be used to create a two-dimensional intensity map for the pixel array for each wavelength measured. Also, the method can be used to create a broad band spectroradiometer for points in the field of view.
REFERENCES:
patent: 3410624 (1968-11-01), Schmidt
patent: 3873207 (1975-03-01), Bryngdahl
patent: 4042302 (1977-08-01), Wentz
patent: 4523847 (1985-06-01), Bjorklund et al.
patent: 5209231 (1993-05-01), Cote et al.
patent: 5521705 (1996-05-01), Oldenbourg et al.
patent: 5587793 (1996-12-01), Nakai et al.
patent: 5788632 (1998-08-01), Pezzaniti et al.
Randall Thompson, Edward Fry, Jerold Bottiger; Polarization-Dependent Light cattering Measurments Using an Electro-Optical Modulator Based Instrument; SPIE vol. 112 Optical Polarimetry; pp. 152-157, Aug. 1977.
Gerhart Grant R.
Matchko Roy M.
Baker La Veria
Chin Tommy P.
Kuhn David L.
Taucher Peter A.
The United States of America as represented by the Secretary of
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