Image pickup lens
US6297915A · kind A · utility
12Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2000 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Feb 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a biconvex lens 1, at least one of faces thereof is formed into an aspherical shape, so that the radius of curvature of the second face of the lens 1 is equal to or larger than 0.65 times the focal length, and the radius of curvature of the first face is over 3 times the radius of curvature of the second face. Thus, the lens can be produced easily at a small size and a light weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.