Method and apparatus for scanning with controlled spherical aberration
US9158953B2 · kind B2 · utility
146Cited by
6References
50Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 14, 2014 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Feb 14, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/806
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reader obtains image data corresponding to an image of optically encoded information that is received via a lens unit that causes controlled spherical aberration blurring that is precisely known. The reader may perform deconvolution processing on the image data to render it decodable. The deconvolution processing may implement a Weiner filter that uses data corresponding to a near-field point spread function of the lens unit. The depth of field of the reader is greater than that of conventional reader in all lighting conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.