Method and apparatus for calibrating a spectrophotometer

Details Method and apparatus for calibrating a spectrophotometer Method and apparatus for calibrating a spectrophotometer

1990-01-23

1993-12-07

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356334, G01J 318

Patent

active

052687376

ABSTRACT:
A spectrophotometer of the type using a pulse motor to rotate a diffraction grating through a speed reducing mechanism has a capability of constructing a conversion table according to a program, by which table a rotation amount of the motor is converted to a corresponding wavelength of output light from a monochromator. The spectrophotometer is capable of designating a calibration mode in which an emission peak at a known wavelength of light from a light source is detected, a coefficient in a conversion equation is determined on the basis of the known wavelength of the emission peak and a rotation amount of the motor at a time when the emission peak is detected, and the determined coefficient is used to construct the conversion table which is then stored in a nonvolatile memory. In an analysis mode, a rotation amount of the motor is converted to a corresponding wavelength in accordance with the conversion table in the nonvolatile memory.

REFERENCES:
patent: 4643572 (1987-02-01), Sonobe et al.
patent: 4710024 (1987-12-01), Fukuma

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