Geometric phase based motion compensation for shearography
US12078817B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Dec 29, 2021 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | May 12, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/283
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser transmission assembly for shearography and related systems utilizing transmissive geometric phase plate pairs in place of Risley prism pairs or movable mirrors therein. Transmissive geometric phase plates provide for a system that is more compact than systems utilizing mirrors or Risley prism pairs while maintaining or improving the adjustability of the system and further offering beamshaping to provide desired illumination patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.