Infrared laser polarimeter

Details Infrared laser polarimeter Infrared laser polarimeter

1991-07-22

1993-09-21

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

356368, 356367, G01N 2121

Patent

active

052471764

ABSTRACT:
An infrared laser polarimeter system for measuring the Mueller matrix of a sample is described which comprises, a infrared laser source for projecting a beam of preselected wavelength (preferably 3-14 .mu.m) along an optical axis, at least one polarizing element disposed along the axis for linearly polarizing the beam and producing an output beam for analysis, first and second rotatable optical retarders disposed between the source and polarizing element and defining a sample region therebetween, the second retarder being rotated at least five times that for the first retarder, an integrating sphere, and a detector for analyzing the output beam.

REFERENCES:
patent: 3155762 (1964-11-01), Gillham
patent: 4306809 (1981-12-01), Azzam
patent: 4681450 (1987-07-01), Azzam
patent: 4818881 (1989-04-01), Tanton et al.
patent: 4884886 (1989-12-01), Salzman et al.
patent: 5045701 (1991-03-01), Goldstein et al.
Polarized Light, by W. A. Shurcliff, Harvard View Press, Boston, (1962), Appendix 2, pp. 165-171.
Matrix Theory of Photoelasticity, by P. S. Theocaris, Springer-Verlag, Berlin (1979), p. 60, table 4.3.
"Photopolarimetric measurement of the Mueller matrix by Fourier analysis of a single detected signal", RMA Azzam, Opt. Lett. 2:6, 148 (1978).
"Measurement of Polarized light interactions via the Mueller Matrix", Thompson et al, Appl. Opt. 19:8, 1323-1332 (Apr. 15, 1980).
"Error Analysis of a Mueller matrix polarimeter", Goldstein et al, J. Opt. Soc. Am. 1(A):4, 693 (Apr. 1990).

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