Off-axial three-mirror optical system with freeform surfaces
US9703084B2 · kind B2 · utility
3Cited by
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16Claims
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Key dates
| Filing date | Jun 1, 2015 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Aug 31, 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 a primary mirror, a secondary mirror, a tertiary mirror, and an image sensor. The primary mirror is located on an incident light path. The secondary mirror is located on a primary mirror reflecting light path. The tertiary mirror is located on a secondary mirror reflecting light path. The image sensor is located on a tertiary mirror reflecting light path. A primary mirror surface and a tertiary mirror surface are all xy polynomial freeform surfaces up to a fifth order. A secondary mirror surface is a planar surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.