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25 October 2004 Manufacture and use of a Shack-Hartmann sensor with a multifaceted prism for simultaneous sensing of multiple wavefronts
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Abstract
A new requirement for astronomical adaptive optics is the simultaneous measurement of wavefronts of multiple natural or laser guide stars. We have devised a new implementation of the Shack-Hartmann method to image multiple spot patterns on a single imaging array. An image of the telescope pupil is formed on a multifaceted prism with rings of subapertures. All beacons in the field are then imaged by a camera lens to form the same spot pattern repeated over the detector format. The facets are fly-cut in polycarbonate, tangent to a convex surface. In order to minimize scattering and aid manufacturing, the prism angles are exaggerated, and an index-matching fluid is used to reduce the refracted angles by a factor of 15. Results from lab and telescope tests are presented.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nicole Putnam, Miguel Snyder, Thomas E. Stalcup, and James Roger P. Angel "Manufacture and use of a Shack-Hartmann sensor with a multifaceted prism for simultaneous sensing of multiple wavefronts", Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); doi: 10.1117/12.579781; https://doi.org/10.1117/12.579781
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