Variable focal length constant magnification lens assembly
US7436587B2 · kind B2 · utility
11Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2006 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Jun 12, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Aspects of the invention can provide an imaging device that can include a first optical element having a first focal length, and a second optical element having a variable second focal length. The second optical element can be located at a fixed first distance of approximately the first focal length away from the first optical element. Thus, such an imaging device can permit an optical system to focus on an object at various distances and at a constant magnification with no moving parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.