Spectroscope with vignetting reduction
US7440095B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2007 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Aug 28, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0262
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a spectrometer, preferably in a spectrometric microscope, input light is provided from a light source to a specimen via a source objective element (e.g., a Schwarzchild objective), and the aperture of the light source is matched to the aperture of the source objective element to maximize light throughput to the specimen. The light from the specimen is then collected at a collector objective element and delivered to a camera element, which in turn provides the light to a photosensitive detector. The apertures of the camera element and the collector objective element are also matched to maximize light throughput from the specimen to the detector. As a result, light loss from vignetting effects is reduced, improving the intensity and uniformity of illumination and the sensitivity and accuracy of spectral measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.