Method of controlling size of light beam
US5229877A · kind A · utility
2Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Oct 25, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of controlling a size of a light beam, which comprises rotating a disk having a groove whose size changes continuously or a polygonal-shaped rotor having grooves of different sizes, on the circumferential surface, and irradiating the groove or grooves with a light beam, whereby the groove or grooves provide a transmitted light beam having a size that change continuously or stepwise, respectively, while retaining an analogous form of the light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.