Scanning laser spectrometer

Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrophotometer

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

356 51, 250339, 250345, 2503541, G01J 342, G01N 2139

Patent

active

044102739

ABSTRACT:
A scanning spectrometer incorporating a scanning diode laser powered with a controllable injection current. The injection current control may be set at predetermined discrete levels. These levels may be varied in accordance with signals derived from a servo loop, and may have superimposed upon them a cyclically varying substantially constant amplitude current. The laser output is directed via a beam splitter to both sample and reference cells. The material in the reference cell is so selected as to provide absorption features at each of the desired frequencies. The cyclically varying current is provided with an amplitude sufficient to cause a frequency amplitude at least as great as the maximum breadth of each of these spectral features of interest. The preselected bias currents are selected so as to provide lasing action of the diode at or near each of the selected frequencies. A phase-locked amplifier tuned to the frequency of the cyclically varying current senses the position of the scanned laser output relative to that of the associated absorption feature and provides an error signal to adjust the bias current so as to center the cyclically scanned laser frequency on the selected absorption feature.

REFERENCES:
patent: 3805074 (1974-04-01), McCormack
patent: 4061918 (1977-12-01), Preier 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

Scanning laser spectrometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scanning laser spectrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning laser spectrometer will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1287162

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