Laser blocking filter with neutral transmission color
US5966240A · kind A · utility
14Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1997 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Nov 21, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/285
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A filter system for reflectively blocking laser radiation in the visible spectrum includes a multilayer interference structure arranged for reflectively blocking a continuous band of wavelengths including the laser radiation and transmitting other wavelengths in the visible spectrum. The filter system is arranged to control transmission of the other wavelengths of the visible spectrum such that the filter system has an essentially neutral transmission color and maximum photopic transmission consistent with the band of wavelengths reflectively blocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.