Compact digital camera objective with interdigitated element alignment, stray light suppression, and anti-aliasing features
US6072634A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1997 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Dec 1, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4211
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed a compact lens system having four injection-molded singlet lens elements with one of the singlet lens elements having a diffractive optical surface to control axial chromatic aberrations and another of the singlet lens elements having a flint-like plastic material to control lateral chromatic aberration. The lens system includes interdigitated flange features which provides interdigitated alignment between the lens elements. A plurality of light suppression elements are used to suppress stray light paths from reaching a detector array of the lens system. Moreover, the lens system includes an anti-aliasing surface on one of the lens elements for controlling aliasing effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.