Twin-CGHs for absolute calibration in wavefront testing interferometry
| Autor: | Stephan Reichelt, Hans J. Tiziani |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Wavefront
Physics Calibration (statistics) business.industry Holography Phase (waves) Wavefront sensor Multiplexing Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Interferometry Optics law Encoding (memory) Electrical and Electronic Engineering Physical and Theoretical Chemistry business |
| Zdroj: | Optics Communications. 220:23-32 |
| ISSN: | 0030-4018 |
| Popis: | A novel technique for absolute calibration the wavefront reconstructed by computer generated holograms (CGHs) is presented. It requires a specially designed multiplexed CGH (Twin-CGH), which reconstructs two wavefronts with the same symmetry. One of those is used for calibration of the CGH by means of known absolute interferometric methods. The patterns of both phase functions are simultaneously structured. The aberrations of the calibration wavefront can be transferred to those of the second wavefront. The testing method is explained and two different encoding methods are discussed. For different encoded Twin-Fresnel zone plates we experimentally demonstrate this novel calibration method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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