Remote spectrophotometer
US4770530A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1986 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Apr 23, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/126
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrophotometer (10) is provided having the capability to accurately measure spectral reflectance at relatively long sample distances. A first illumination optics arrangement (14) assures uniform illumination to a portion of the sample and a second optical arrangement (20) focuses the reflected image of part of the illuminated sample onto a polychromator (22). Reference beam means are provided so that the polychromator sequentially measures the spectral characteristics of the reference beam and the sample. Continuous monitoring of the illumination at select wavelengths provides illumination normalization data so that a microprocessor (40) can normalize the illumination and compare the reference beam and sample measurements to accurately determine the spectral reflectance characteristics of the sample. Angular and raster scanning capability is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.