Scanning monochromator

Details Scanning monochromator Scanning monochromator

1991-03-01

1992-03-17

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With monochromator structure

G01J 318

Patent

active

050962957

ABSTRACT:
In its preferred embodiment, a scanning monochromator uses a pulse-driven micro-stepping motor to drive a spectral-dispersion element via a reduction-gear harmonic drive. The motor is directly coupled to the input hub of the reduction-gear drive, and the output hub of the reduction-gear drive directly supports the spectral-dispersion element. By selecting a motor with a great number of steps per revolution, and a harmonic drive with a great reduction ratio, a resolution of 5 million pulsed steps is available, per single rotation of the output hub of the reduction-gear drive. This translates into more than 600,000 incremental angular-displacement steps over a usable 45.degree. range of dispersion-element rotation.

REFERENCES:
patent: 4211486 (1980-07-01), Magnussen, Jr. et al.
patent: 4469441 (1984-09-01), Bernier et al.
patent: 4540282 (1985-09-01), Landa et al.

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