Finder optical system
US10634975B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 2016 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Aug 12, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A finder optical system is achieved in which object images can be more easily observed.A finder optical system includes an image-erecting member, which erects an object image formed by an objective optical system, provided on an optical path from the object side toward an eyepiece side, wherein the image-erecting member is formed as a penta roof prism provided with a first reflection surface and a second reflection surface, which define a roof reflection surface that reflects an incident light bundle emanated from the object, and the first reflection surface and the second reflection surface are configured as total-reflection surfaces that totally reflect the light bundle including the object image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.