Imaging optical system and image pickup apparatus
US7369326B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2006 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Nov 6, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/102
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact bent zooming imaging optical system characterized by sufficient aberration correction. The imagining optical system contains, in order from the object, a first lens group having positive refractive power, a second lens group with negative power which has a reflective optical element for bending the optical axis and lenses on each of the object side and the image side of the reflective optical element, and a following lens group. At least the aforementioned first lens group and following lens group are moved to change in the magnification. −0.6<φ1/φ2<−0.15 is satisfied wherein φ1 denotes the refractive power of the first lens group and φ2 indicates the refractive power of the second lens group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.