Optical object distance simulation device for reducing total optical path
US7800841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2008 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Dec 25, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/0095
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical object distance simulation device for reducing total optical path includes: a lens, an achromatic lens set, a first image lens, and a second image lens. The achromatic lens set disposes beside one side of the lens, the first image lens disposes beside one side of the achromatic lens set, and the second image lens disposes beside one side of the first image lens. The achromatic lens set is composed of a first lens and a second lens. The first lens is a double-concave lens. The second lens is a double-convex lens. One concave face of the double-concave tightly contacts with one convex face of the double-convex lens. Therefore, the lens, the achromatic lens set, the first image lens, and the second image lens match with each other in order to simulate real object distance for reducing an object distance between a test camera lens and a corresponding chart.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.