Light trap
US5745293A · kind A · utility
20Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1996 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Aug 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light trap for a parallel light beam includes an entry member having a frustoconical opening in it and a conical body attached to a back wall of the trap. The frustoconical opening narrows from the outside towards the inside and has at the outside a diameter equal to the diameter D of the light beam. The entry member has a thickness E=D/(tan 2A+tan A) where A is the cone angle of the frustoconical opening. The conical body reflects light uniformly in all directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.