Spectrophotometer with a system for calibrating a monochromator

Details Spectrophotometer with a system for calibrating a monochromator Spectrophotometer with a system for calibrating a monochromator

1995-03-17

1996-09-17

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrophotometer

356328, 356334, G01J 318

Patent

active

055574041

ABSTRACT:
Irregular mechanical imperfections caused by constituent parts of a monochromator in connection with wavelength setting are compensated by calibrating the monochromator according to the present invention. A whole measurable spectral range in the monochromator is divided into a plurality of spectral regions by a plurality of calibration wavelengths. Errors between apparent wavelengths set theoretically and their true wavelengths are obtained with respect to the respective calibration wavelengths. Error functions in connection with the respective spectral regions are calculated on the basis of the array of the obtained errors. An element to be detected in a sample is measured under a wavelength the error of which has been compensated for by use of an error function in a spectral region associated with a wavelength to be detected.

REFERENCES:
patent: 4779216 (1988-10-01), Collins
patent: 4916645 (1990-04-01), Wuest et al.
patent: 5268737 (1993-12-01), Fukuma et al.
Grounding and Method of Spectroscopy, pp. 405-413, Ohm Inc. (1985).
Spectrochimica Acta, vol. 39B, No. 7, pp. 867-878, 1984.
Applied Spectroscopy, vol. 45, No. 6, pp. 993-998, 1991.

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