Off-axial three-mirror optical system with freeform surfaces
US9268123B2 · kind B2 · utility
6Cited by
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19Claims
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Key dates
| Filing date | Dec 16, 2014 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Dec 16, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An off-axial three-mirror optical system with freeform surfaces includes a primary mirror, a secondary mirror, a tertiary mirror, and a detector. 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 detector is located on a tertiary mirror reflecting light path. Each of the primary mirror, the secondary mirror, and the tertiary mirror is an xy polynomial freeform surface up to the fifth order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.