Imaging optical system and range finder
US8469528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2010 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jul 5, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/1825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging optical system includes three reflecting mirrors having first to third reflection surfaces and is configured, such that in an XYZ orthogonal coordinate system using an optical axis at the center of the field of view as Z-axis, the optical axis at the center of the field of view and an optical axis of an image plane are in parallel to each other Assuming that along the path of the beam traveling along the optical axis at the center of the field of view a distance between the second reflection surface and the third reflection surface is L2, a distance between the third reflection surface and the image plane is L3 and fy1 and an equivalent F-number of the imaging optical system is represented as Fno, the relational expression 0.5<Fno(L2/L3)<1.3 is satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.