Wide band grating spectrometer
US4060327A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1976 |
| Grant date | Nov 29, 1977 |
| Priority date | — |
| Expiry date | Sep 13, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0294
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrophotometer includes an illumination section for illuminating a test sample, and a spectrometer portion for receiving light from a test sample and measuring the radiant energy thereof as a function of wavelength. The spectrometer includes an entrance slit and two stationary gratings for dispersing light admitted through the slit into two separate dispersed beams or spectra. The separate beams are focused upon linear arrays of photodiodes providing outputs proportional to the intensity of the light rays at the different wavelengths received thereby. The gratings produce different primary orders of dispersion so that the efficiency of operation thereof is relatively high across a relatively wide band of radiant energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.