Multi-special decentered catadioptric optical system
US5841574A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1996 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Jun 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/0852
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-spectral decentered catadioptric-type optical system suitable for use with long range oblique aerial reconnaissance camera systems, spectrum analyzers, astronomical imagers, remote sensing, and other applications is described. The optical system includes an aspheric primary mirror receiving incident radiation and defining a central aperture. An aspheric secondary mirror is provided for receiving the radiation from the primary mirror. The primary and secondary mirrors are positioned and constructed such that entrance aperture of the system is displaced or decentered relative to the optical axis of the system, so as to thereby increase the modulation transfer function of the optical system as compared to a centrally obscured system. The aspheric secondary mirror directs the incident radiation onto a means for splitting the radiation to a first optical path and a second optical path. A first field optical assembly is placed in the first optical path for directing radiation in a first portion of the electromagnetic spectrum onto a first radiation receiving device, such as a film camera or electro-optical detector. A second field optical assembly is placed in the second optical …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.