Rui Living Tr Lin

US Patent:

52528340, Oct 12, 1993

Filed:

Nov 13, 1990

Appl. No.:

7/614080

Inventors:

Rui Lin - Corona CA

Assignee:

Union Oil Company of California - Los Angeles CA

International Classification:

G01N 2164

US Classification:

2504581

Abstract:

A short pulse of laser excitation and a synchronized gating time control of a fluorescence spectrograph detector are combined with a microscope, precise focusing and delivery optics, multi-mode illumination means, cooling, and temperature controls to form a new microspectrophotometry system. The gating control can block detection of any unwanted excitation radiation, such as nearly instantaneous (within 10. sup. -12 seconds) emissions after the sample is pulse excited and delayed emissions (after 10. sup. -7 seconds) after the sample is pulse excited. The gating also allows delayed emissions to be separately isolated. The microscopic focusing, pulse excitation and time segregation of detected emissions achieves a new level of precision in the detected structural spectra and property measurements not generally achievable for composite samples by prior art methods and devices.