Distortion tuning of quasi-telecentric lens
US7646543B2 · kind B2 · utility
2Cited by
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37Claims
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Key dates
| Filing date | Apr 26, 2007 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Apr 26, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/706
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A non-linear modification to telecentric object space together with alteration of working distance provides a distortion adjustment feature. The modification to telecentric object space can be manifest as a spherical aberration in an entrance pupil. The change in working distance can be made by relatively translating the imaged object through the modified telecentric object space. The distortion adjustment can be made to compensate for distortions accompanying changes in ambient or operating conditions. Distortions accompanying magnification corrections can also be corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.