Illumination system
US3999855A · kind A · utility
19Cited by
3References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1974 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Oct 24, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved system is described for providing approximately equalized illumination at all points between first and second opposite portions of a total internally reflecting cell. The system comprises in addition to the cell, a source of radiation of at least one selected wavelength, means for directing the radiation along a plurality of paths, and means for introducing the radiation in at least two of the paths into first and second opposite portions of the cell. Means can be provided for varying the penetration angle of the radiation into the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.