Off-axial three-mirror optical system with freeform surfaces
US9405109B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 1, 2015 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Jun 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/0642
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An off-axial three-mirror optical system with freeform surfaces includes 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 transmitted light path. 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. A primary mirror surface and a tertiary mirror surface have a same freeform surface equation, and the freeform surface equation is a sixth order x′y′ polynomial. A secondary mirror surface is a tenth order aspherical surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.