High-output optical attenuator, measurement device, and 3D shaping apparatus
US10162187B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2015 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Jun 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/205
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
This invention is directed to attenuating a beam output without changing the beam position and the beam diameter. A high-output optical attenuator includes a first reflector that totally reflects incident light and causes first reflected light serving as reflected light of the incident light to enter a second reflecting portion, a second reflector that reflects the first reflected light and causes second reflected light serving as reflected light of the first reflected light to enter a third reflecting portion, a third reflector that reflects the second reflected light and causes third reflected light serving as reflected light of the second reflected light to enter a fourth reflecting portion, and a fourth reflector that reflects the third reflected light as fourth reflected light having the same optical axis as the optical axis of the incident light. At least two of the second reflector, the third reflector, and the fourth reflector are half mirrors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.