Photometric apparatus with multi-wavelength excitation
US4565447A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1983 |
| Grant date | Jan 21, 1986 |
| Priority date | — |
| Expiry date | Nov 21, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for photometric measurement of optical properties of a fluid medium utilizing multi-wavelength excitation includes a movable diffraction grating that is continuously oscillated over the spectral range of interest and a flashlamp producing high intensity, short duration flashes. The angular position of the grating at the time of a flash determines what wavelength of optical energy will be passed to the remainder of the system. Because the flash duration is brief in relation to the period of movement of the grating, the flash effectively freezes the motion of the grating allowing the high intensity output of the flashlamp to be supplied to the fluid medium, while successive flashes permit measurement at many different wavelengths in near simultaneous fashion. The system is disclosed for use in an absorbance detector for liquid chromatography.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.