System for calibrating a monochromator

Details System for calibrating a monochromator System for calibrating a monochromator

1986-03-07

1988-10-18

Lall, Parshotam S.

Boots, shoes, and leggings

73 1R, 356138, 356346, 36416701, 364525, G01C 2500, G06F 1520

Patent

active

047792167

ABSTRACT:
A method for calibrating a monochromator to compensate for mechanical imperfections in its diffraction grating and grating drive assembly employs a two stage interactive procedure which permits the use of small (0.2 nm) spectral regions for the identification of emission lines. An iterative, self-consistent, discrete Fourier transform is used for the determination of multiple positioning correction terms. When the Fourier calculations are completed, the results of the calibration procedure are presented by the system to the analyst for acceptance. If accepted, the positioning error of the primary calibration line is measured, stored and used by the system to maintain a zero centered distribution of positioning errors each time the monochromator is reinitialized.

REFERENCES:
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patent: 4298944 (1981-11-01), Stoub et al.
patent: 4329051 (1982-05-01), Chamran et al.
patent: 4432640 (1984-02-01), Grage et al.
patent: 4468119 (1984-08-01), Hamar
patent: 4471447 (1984-09-01), Williams et al.
patent: 4605304 (1986-08-01), Leitz et al.

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