Miniature imaging lens for close-range imaging
US11506869B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 2, 2019 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Sep 2, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A miniature imaging lens for close-range imaging includes: a first lens group, an aperture, and a second lens group sequentially arranged in a direction from the object side to the image side of an optical axis; the first lens group and the second lens group have positive focal power, an object-side clear aperture of the first lens group is larger than an image-side clear aperture of the first lens group, and an object-side clear aperture of the second lens group is less than an image-side clear aperture of the second lens group, and specific process parameters are provided. A sandwich structure lens configuration composed of a first lens group, an aperture and a second lens group can obtain a high close-range imaging effect under the condition of miniaturization, and can effectively reduce aberrations of close-range imaging, especially distortion and chromatic aberration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.