Pulsed and gated multi-mode microspectrophotometry device and method
US5252834A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1990 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Nov 13, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/6417
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.