Focus calibration apparatus for camera lens fine tuning
US8019216B2 · kind B2 · utility
15Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 2009 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Nov 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A focus calibration apparatus allows fine adjustments to be made to the focal distance between a camera lens and sensor, in particular to take into account small changes in the mechanical tolerances such as when changing lenses. The calibration apparatus has a simple mechanism, like a focus ring, that a user can easily manipulate to simplify and speed the lens calibration process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.