Dichroic mangin mirror
US7333271B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 2005 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Nov 30, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system having at least one dichroic Mangin mirror. The optical system has a front-end optical sub-system or a light source operative to emit an optical beam. The optical beam is dispersed into at least a first color beam and a second color beam and has certain degree of monochromatic aberration. The dichroic Mangin mirror is disposed along the optical paths of both the first and second color beams. The dichroic Mangin mirror includes a first surface operative to transmit the first color beam only, but reflects the second color beam. Therefore, upon incident on the dichroic Mangin mirror, the second color beam is reflected, while the first color beam transmits through the first surface and is then reflected off from the second surface. Thereby, the first and second color beams can be focused at the same position, which is referred as an achromatic system focus. Thereby, the chromatic aberration caused by the dispersion can be eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.