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1. (WO1991003725) COMBINED OPTICAL TRAIN FOR LASER SPECTROSCOPY

Pub. No.:    WO/1991/003725    International Application No.:    PCT/US1990/004569
Publication Date: Mar 21, 1991 International Filing Date: Aug 13, 1990
IPC: G01J 1/42
G01N 15/02
G01N 21/47
Applicants: THE UNIVERSITY OF AKRON
Inventors: CHEUNG, H., Michael
Title: COMBINED OPTICAL TRAIN FOR LASER SPECTROSCOPY
Abstract:
An improved method and apparatus of collecting quasi-elastic light scattering (QELs) data and time average intensity simultaneously. The apparatus utilizes a pair of matched optical elements (60, 62) that eliminate the need of index matching fluids that are currently required to eliminate flare from the sample cell (20) walls at the cell-sample (18) and the cell-air interfaces. The optical elements (60, 62) incorporate desirable aspects of a pinhole aperture optical system (35) and a double lens (60, 62) and center mask (31) optical system.