Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Measuring or testing
Patent
1988-03-31
1989-07-11
Hannaher, Constantine
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Measuring or testing
2503381, 356346, 377 3, 377 45, 377 53, G01N 2135, G01D 526, G01B 902
Patent
active
048478784
ABSTRACT:
The position of the moving mirror (20) in a Fourier-transform infrared spectrometer is monitored with a circuit which has an incremental counter formed of a plurality of cascaded up/down counters (82, 84, and 86) that count the pulses received by a laser detector (42) to yield a relative position count. A microprocessor (100) maintains an absolute position count by reading the counters (82, 84, and 86) and updating its absolute position count at regular intervals. A portion of the circuit is dedicated to discriminating the direction of the moving mirror (20) by gating circuitry connected to the digitized output of the laser detectors (42, 44).
REFERENCES:
patent: 3409375 (1968-11-01), Hubbard
patent: 4132940 (1979-01-01), Schindler
patent: 4215413 (1980-07-01), Stark et al.
patent: 4413908 (1983-11-01), Abrams et al.
patent: 4429267 (1984-01-01), Veale
patent: 4509044 (1985-04-01), Yachida
patent: 4799001 (1989-01-01), Burch
Technical Description for Nicolet Model 60 SX, copyright 1983, pp. 30-35.
Hannaher Constantine
Nicolet Instrument Corporation
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