Spectrometers

Details Spectrometers Spectrometers

1994-06-08

1996-11-26

Hantis, K.

Optics: measuring and testing

By dispersed light spectroscopy

With aperture mask

356326, G01J 304

Patent

active

055791050

ABSTRACT:
A multi-sample spectrometer which finds particular application in such applications as on-line process control and monitoring, employs a Hadamard encoding scheme and comprises a source of radiation, a primary encoder to encode radiation from the source, a sample receiver to position the samples in the radiation path, a secondary encoder to modulate the intensity of radiation directed to individual samples, and a detector for receiving radiation from the samples.

REFERENCES:
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patent: 4007989 (1977-02-01), Wajda
patent: 4448529 (1984-05-01), Krause
patent: 4766379 (1988-08-01), Miyazaki et al.
Harwit, "Spectrometric Imager", Applied Optics, vol. 10, #6, Jun. 1971.
A. G. Marshall in "Fourier, Hadamard and Hilbert Transforms in Chemistry", A. G. Marshall Ed., Plenum Press (1982) pp. 33-43.
F. Yates "Complex Experiments", J. Royal Statistical Society, May 1935, pp. 181-223.
M. Harwit, et al., "Hadamard Transform Optics", Academic Press, 1949, Chapters 1 and 3 and the Appendix, pp. 1-19, 44-95 and 200-228.
J. A. Decker, Jr., et al., "Experimental Operation of a Hadamard Spectrometer", Applied Optics, vol. 8, No. 12, Dec. 1969, pp. 2552-2554.
D. C. Tilotta, et al., "A Visible Near-infrared Hadamard Transfor Spectrometer Based on a Liquid Crystal Spatial Light Modulator Array: A New Approach in Spectrometry, Applied Spectroscopy", vol. 41, No. 5, 1987, pp. 727-734.
P. J. Treado et al, The Hadamard Transform, 266b Analytical Chemistry, vol. 61, No. 11, Jun. 1989, whole document.
J. A. Decker, Jr. et al, Experimental Operation of a Hadamard Spectrometer, Applied Optics, Vo. 8, No. 12, Dec. 1969.

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