Scanning monochromator
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United States of America Patent
Stats
-
Mar 17, 1992
Grant Date -
N/A
app pub date -
Mar 1, 1991
filing date -
Mar 1, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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