Optical topographic imaging
US9082188B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2012 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | May 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10152
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and devices of studying a predefined portion of an object having a feature of interest are disclosed. The feature of interest defines a class of objects that includes the object. Light sources directly illuminate the object from different illumination directions. The light sources are maintained in a stable configuration relative to the object. For each illumination direction, an image is generated from light scattered from the object with a camera maintained in a stable configuration relative to the light sources. A methodology derived from machine learning for the class of objects is applied to filter the generated images are filtered for a characteristic consistent with the feature of interest. Surface gradients are determined from the filtered images and integrated to generate a topography of a surface of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.