Abstract
The proposed optimum phase defocus grating for wavefront curvature sensing features an equidistantly quantized two-phase-step and a phase step height of π. 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%.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Roddier F. Curvature sensing and compensation: a new concept in adaptive optics. Applied Optics, 1988, 27(7): 1223–1225
Forbes F F, Roddier N A. Adaptive optics using curvature sensing. Proceedings of SPIE, 1991, 1542: 140–147
Blanchard P M, Greenaway A H. Simultaneous multiplane imaging with a distorted diffraction grating. Applied Optics, 1999, 38(32): 6692–6699
Blanchard P M, Fisher D J, Woods S C, et al. Phase-diversity wave-front sensing with a distorted diffraction grating. Applied Optics, 2000, 39(35): 6649–6655
Blanchard P M, Greenaway A H. Broadband simultaneous multiplane imaging. Optics Communications, 2000, 183(1–4): 29–36
Swanson G J, Veldkamp W B. Diffractive optical elements for use in infrared systems. Optical Engineering, 1989, 28(6): 605–608
Xi F J, Jiang Z F, Xu X J, et al. High-diffractive-efficiency defocus grating for wavefront curvature sensing. Journal of the Optical Society of America A, 2007, 24(11): 3444–3448
Woods S C, Greenaway A H. Wave-front sensing by use of a Green’s function solution to the intensity transport equation. Journal of the Optical Society of America A, 2003, 20(3): 508–512
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Acta Optica Sinica, 2007, 27(2): 377–378 [译自: 光学学报]
Rights and permissions
About this article
Cite this article
Xi, F., Xu, X., Wang, T. et al. Wavefront curvature sensor with phase defocus grating. Front. Optoelectron. China 1, 119–122 (2008). https://doi.org/10.1007/s12200-008-0020-6
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12200-008-0020-6