Wide-aperture spherical primary mirror off-axis afocal optical system
US11906718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2022 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Apr 3, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/0812
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a wide-aperture spherical primary mirror off-axis afocal optical system, including a primary mirror, a secondary mirror and an aberration compensation mirror group. The primary mirror is a spherical reflector, the secondary mirror are higher-order aspherical reflectors. The primary mirror and the secondary mirror form an off-axis two-mirror system to compress the beam aperture. The aberration compensation mirror group is a coaxial reflective system that is used off-axis. The aberration compensation mirror group has focal power to produce compensation aberrations. The incident beam passes through and is reflected by the primary mirror and secondary mirror sequentially and enters the aberration compensation mirror group thereafter. A spherical reflector is used as the primary mirror, which significantly reduces the development and manufacture cost of the system, and an aberration compensation mirror group is used off-axis to correct residual aberration in the system, which effectively improves imaging quality of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.