Effect of CCD nonlinearity on wavefront detection by shearing interferometry
| Autor: | Feng Guo-Ying, Zhou Shou-Huan, Du Yong-Zhao, zhang kai, li hongru, Deng Guoliang |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
Wavefront Shearing (physics) business.industry Astrophysics::Instrumentation and Methods for Astrophysics Wavefront sensor Spectral component Laser Atomic and Molecular Physics and Optics law.invention symbols.namesake Third order Interferometry Fourier transform Optics law symbols Electrical and Electronic Engineering business |
| Zdroj: | High Power Laser and Particle Beams. 22:1775-1779 |
| ISSN: | 1001-4322 |
| DOI: | 10.3788/hplpb20102208.1775 |
| Popis: | When radial shear interferometer is used in high-power laser wavefront detection, due to the influence of the nonlinearity of CCD, there exist not only the first order frequency with wave-front information but also the second and the third order frequency. They may lead to overlapping spectrum, which makes it difficult to extract useful information and reduces the detection accuracy of wavefront. A theoretical analysis on mechanisms of high-order spectral component and spectrum aliasing caused by the nonlinearity of CCD is established, and the condition to avoid spectrum aliasing is pointed out. Finally, a method by increasing the spatial carrier frequency to reduce or eliminate the spectrum aliasing is proposed. Computer simulation and experimental results have verified the feasibility of |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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