Optics: measuring and testing – By dispersed light spectroscopy – With monochromator structure
Patent
1979-05-08
1980-05-20
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With monochromator structure
356334, 250231SE, G01J 312
Patent
active
042036690
ABSTRACT:
A wavelength reading apparatus for a monochromator comprises a monochromator utilizing a dispersion element for dispersing light in accordance with its wavelengths, a dispersion element driver unit for rotating the dispersion element to effect the tuning wavelength scanning operation of the monochromator and a wavelength counter for adding or subtracting a pulse, which is produced each time when the tuning wavelength of the monochromator changes by a predetermined wavelength increment, depending on whether the wavelength increases or decreases. The wavelength counter is set to a predetermined counting value, in response to a wavelength calibrating pulse produced when the tuning wavelength of the monochromator reaches a predetermined value, so that any counting value of the wavelength counter correctly represents the instant value of the tuning wavelength of the monochromator.
REFERENCES:
patent: 3563656 (1971-02-01), Helms
patent: 3770971 (1973-11-01), Somerset
patent: 3794425 (1974-02-01), Smith et al.
patent: 3868499 (1975-02-01), Aaronson
patent: 4037970 (1977-07-01), Webster et al.
"Programmable Monochromator . . . ", Cordos et al., Anal. Chem., vol. 45, #2, Feb. 1973, pp. 425-433.
Maeda Yoshio
Matsumoto Koichi
Nishiwaki Koji
Hitachi , Ltd.
McGraw Vincent P.
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