Method and apparatus for detecting universal and selectively con

Details Method and apparatus for detecting universal and selectively con Method and apparatus for detecting universal and selectively con

1986-12-31

1988-11-15

Rosenberger, R. A.

Optics: measuring and testing

For light transmission or absorption

356128, 356129, G01N 2141, G01N 2100

Patent

active

047844949

ABSTRACT:
Concentration gradients in samples to be evaluated are detected by measuring the deflection of a probe light beam passed through the sample using the principals of Shlieren optics. Specific chemical compounds in a sample can be detected and identified by supplying excitation energy to the sample where such energy is selected to be absorbed by the chemical compound to be specifically identified and not by other compounds in the sample. The absorption of the excitation energy by the absorbing compound produces a temperature gradient within the sample which causes deflection of the probe light beam and signals representative of such deflection may be separated from signals representative of deflections caused by other refractive index gradients present in the sample. A light emitting diode may be used to generate the probe light beam. Rather than detecting movement of the probe light beam caused by an unknown gradient, by passing the probe light beam through a known gradient, with or without excitation energy present, the light beam can be deflected in a controlled manner.

REFERENCES:
patent: 3812482 (1974-05-01), Clark
patent: 4468136 (1984-08-01), Murphy et al.
patent: 4547071 (1985-10-01), Teitelbaum
patent: 4591272 (1986-05-01), Morris et al.
patent: 4641965 (1987-02-01), Harmer
patent: 4666308 (1987-05-01), Williams
patent: 4681437 (1987-07-01), Aven et al.
Trace Analysis in Gases by Laser Induced Schleiren Technique, Herrmann & Pohl, 4208, 4209, vol. 21, No. 10, 3-79.

Affiliated with

Also associated with

Rating

Method and apparatus for detecting universal and selectively con does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting universal and selectively con, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting universal and selectively con will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1100656