Thermometer for remote temperature measurements

Optical: systems and elements – Optical modulator – Light wave temporal modulation

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

250351, G02F 103

Patent

active

056594160

ABSTRACT:
An instrument is provided for measuring the temperature of an object from infrared radiation emitted by the object. The instrument includes a radiation detector, a temperature indicating device connected to the detector, and a modulator disposed in a path of a radiation beam from the object for converting the beam into a series of pulses when the modulator is vibrated in and out of the path. The modulator includes a primary piezoelectric element adapted to vibrate when subjected to driving signals at a frequency related to the resonant frequency of the modulator, and a secondary piezoelectric element connected with and driven by the primary piezoelectric element. The secondary piezoelectric element is electrically insulated from the primary piezoelectric element. The modulator also includes a blocking element connected with the secondary piezoelectric element and disposed to move in and out of the path of the beam. A phase locked loop oscillator circuit is connected to the primary and secondary piezoelectric elements for operating the primary element. The secondary piezoelectric element is adapted to generate a signal indicative of the phase and frequency of the primary piezoelectric element to lock the circuit at the resonant frequency of the modulator.

REFERENCES:
patent: 3594583 (1971-07-01), Sheldon
patent: 3722282 (1973-03-01), Loy
patent: 3806228 (1974-04-01), Imagawa et al.
patent: 3925668 (1975-12-01), Anderson et al.
patent: 3988704 (1976-10-01), Rice et al.
patent: 4233512 (1980-11-01), Rupert
patent: 4579463 (1986-04-01), Rosencwaig et al.
patent: 4706046 (1987-11-01), Dieulesaint et al.
patent: 4806760 (1989-02-01), McGlade
patent: 4850697 (1989-07-01), Schoennauer et al.
patent: 5251057 (1993-10-01), Guerin et al.
patent: 5391001 (1995-02-01), Rupert et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Thermometer for remote temperature measurements does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermometer for remote temperature measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermometer for remote temperature measurements will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1108912

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.