Method for designing off-axis three-mirror imaging system with freeform surfaces
US10495875B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 30, 2015 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Oct 2, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/0642
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for designing an off-axis three-mirror imaging system with freeform surfaces is provided. A primary mirror initial structure, a secondary mirror initial structure, and a tertiary mirror initial structure are established. A number of first feature rays are selected, while the primary mirror initial structure and the secondary mirror initial structure unchanged. The first feature rays are forward ray tracked from an object space to an image detector. A number of first feature data points are calculated to obtain a tertiary mirror. A number of fields and a number of second feature rays are selected, while the secondary mirror initial structure and the tertiary mirror unchanged. The second feature rays are reverse ray tracked from the image detector to the object space. A number of second feature data points are calculated to obtain the primary mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.