Lens optical system
US7295387B1 · kind B1 · utility
8Cited by
16References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/009
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens optical system is provided with a cemented lens element formed by cementing two constituent lens elements made of different optical materials together, with a diffractive optical surface formed at the cementing interface between the two constituent lens elements. The two constituent lens elements have at their respective interfaces with air a radius of curvature different from the radius of curvature that they have at the cementing interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.