Determining a polar error signal of a focus position of an autofocus imaging system
US9578227B2 · kind B2 · utility
2Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2011 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Jul 25, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An autofocus imaging system for a microscope system includes a tilted autofocus image sensor that images an oblique cross-section of a slide. The autofocus imaging system focuses multiple sequential overlapping images, which have been taken by the tilted autofocus image sensor, by making a comparison of the multiple sequential overlapping images. An axial position of a tissue layer on the slide can be determined from a polar error signal resulting from this comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.