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Wavefront curvature sensor with phase defocus
grating
- XI Fengjie, XU Xiaojun, WANG Tiezhi, JIANG Zongfu, GENG Yifeng
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College of Optoelectronic Science and Engineering, National University of Defense Technology
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History
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| Published |
| 05 Jun 2008 |
| Issue Date |
| 05 Jun 2008 |
The proposed optimum phase defocus grating for wavefront curvature sensing features an equidistantly quantized two-phase-step and a phase step height of ?. The optimum phase defocus grating suppresses the influence of zero-order diffraction. The high diffractive efficiencies of the ±1 diffraction orders are verified experimentally, showing average values of 38.08% and 40.36% respectively. The phase plate introduces the wavefront deformation, which are measured by wavefront curvature sensing and reconstructed via the Green’s Function algorithm. The reconstructed wavefront is compared with the measurement result of a Veeco interferometer. It is verified that the measurement of the self-designed curvature sensor is correct. The error percent of peak-valley value (PV) is 10%, and the error percent of root mean square (RMS) is 2%.
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References
1. Roddier F . Curvaturesensing and compensation: a new concept in adaptive optics. Applied Optics, 1988, 27(7): 1223–1225
2. Forbes F F, Roddier N A . Adaptive optics using curvaturesensing. Proceedings of SPIE, 1991 1542: 140–147
3. Blanchard P M, Greenaway A H. Simultaneous multiplane imaging with a distorted diffractiongrating. Applied Optics, 1999, 38(32): 6692–6699. doi:10.1364/AO.38.006692
4. Blanchard P M, Fisher D J, Woods S C, et al.. Phase-diversity wave-front sensing with a distorteddiffraction grating. Applied Optics, 2000, 39(35): 6649–6655. doi:10.1364/AO.39.006649
5. Blanchard P M, Greenaway A H . Broadband simultaneous multiplaneimaging.OpticsCommunications, 2000, 183(1–4): 29–36
6. Swanson G J, Veldkamp W B . Diffractive optical elementsfor use in infrared systems. Optical Engineering, 1989, 28(6): 605–608
7. Xi F J, Jiang Z F, Xu X J, et al.. High-diffractive-efficiency defocus gratingfor wavefront curvature sensing. Journalof the Optical Society of America A, 2007, 24(11): 3444–3448. doi:10.1364/JOSAA.24.003444
8. Woods S C, Greenaway A H . Wave-front sensing by useof a Green's function solution to the intensity transport equation. Journal of the Optical Society of America A, 2003, 20(3): 508–512. doi:10.1364/JOSAA.20.000508
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