Off-axis three-mirror optical system with freeform surfaces
US9846298B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 23, 2016 |
| Grant date | Dec 19, 2017 |
| Priority date | — |
| Expiry date | Aug 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An off-axis three-mirror optical system with freeform surfaces comprised an aperture, a primary mirror, a secondary mirror, a tertiary mirror, and a detector. The aperture is located on an incident light path. The primary mirror is located on an aperture side. The secondary mirror is located on a primary mirror reflected light path. The tertiary mirror is located on a secondary mirror reflected light path. The detector located on a tertiary mirror reflected light path. The primary mirror and the tertiary mirror have a same fifth-order polynomial freeform surface expression. The primary mirror reflected light path, the secondary mirror reflected light path and the tertiary mirror reflected light path overlap with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.