Device for synchronous modulation, synchronous light-path switch-over and control-signal derivation for step-drive controlled modulation and switch-over devices
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United States of America Patent
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Apr 19, 1988
Grant Date -
N/A
app pub date -
Jun 18, 1986
filing date -
Jul 1, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Device for synchronous modulation, synchronous light-path switch-over and control-signal derivation for step-drive controlled modulation and switch-over devices, especially for multibeam spectral analysis equipment and preferably for the infrared region of the spectrum, in which the radiation modulation is effected by a rotating light stop and the light path switch-over between a measuring beam and a reference beam is effected by pivoting mirrors. The device provides for the use of only a single photosensor. The synchronization between the stepping motor for moving the light stop and the stepping motors for moving the mirrors is effected via a counting logic and common clocking. Moreover, set pulses are generated to set the mirrors in defined positions, and control signals are generated for further processing.
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