Imaging lens and imaging module
US8422139B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2011 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Aug 4, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In order to attain an imaging lens whose resolution performance is totally excellent, the imaging lens is in a shape of rotation symmetry in an optical effective aperture, and an image height-MTF property of the imaging lens is designed such that a maximum MTF value of a peripheral region where the image height is greater than zero is greater than an MTF value of a center region where the image height is zero in at least one of a sagittal direction and a tangential direction. This makes it possible to totally maintain an excellent resolution performance of a product even in a case where the performance of the product becomes unstable due to a tolerance that occurs at the time of manufacturing the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.