Fast auto-focus in imaging
US9041791B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 2011 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Jan 24, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10148
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosure relates to methods and systems for automatically focusing multiple images of one or more objects on a substrate. The methods include obtaining, by a processor, a representative focal distance for a first location on the substrate based on a set of focal distances at known locations on the substrate. The methods also include acquiring, by an image acquisition device, a set of at least two images of the first location. The images are each acquired using a different focal distance at an offset from the representative focal distance. The methods further include estimating, by a processor, an ideal focal distance corresponding to the first location based on comparing a quality of focus for each of the images, and storing the estimated ideal focal distance and the first location in the set of focal distances at known locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.