Junction lens device, zoom lens optical system employing same, and camera employing the zoom lens optical system
US7116482B2 · kind B2 · utility
2Cited by
1References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2003 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Dec 9, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A junction lens device is made by joining a high refractive lens and a low refractive lens using an adhesive. A coating layer for index matching is formed on a surface of at least one of the high refractive lens and the low refractive lens contacting the adhesive to reduce a reflection ratio on a junction surface. The coating layer is formed such that a reflection ratio on the junction surface with respect to a visible light ray is not more than about 0.2%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.