Manufacture and use of a Shack-Hartmann sensor with a multifaceted prism for simultaneous sensing of multiple wavefronts

Nicole Putnam; Miguel Snyder; Thomas Stalcup; Roger Angel

doi:10.1117/12.579781

Manufacture and use of a Shack-Hartmann sensor with a multifaceted prism for simultaneous sensing of multiple wavefronts

Nicole Putnam, Miguel Snyder, Thomas Stalcup, Roger Angel

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

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.

Original language	English (US)
Article number	200
Pages (from-to)	1138-1145
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5490
Issue number	PART 3
DOIs	https://doi.org/10.1117/12.579781
State	Published - 2004
Event	Advancements in Adaptive Optics - Glasgow, United Kingdom Duration: Jun 21 2004 → Jun 25 2004

Keywords

Adaptive optics
Index matching
Laser guide star
MCAO
Prism array
Tomography
Wavefront sensor

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.579781

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Manufacture and use of a Shack-Hartmann sensor with a multifaceted prism for simultaneous sensing of multiple wavefronts. / Putnam, Nicole; Snyder, Miguel; Stalcup, Thomas et al.
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5490, No. PART 3, 200, 2004, p. 1138-1145.

Research output: Contribution to journal › Conference article › peer-review

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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.",

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AU - Snyder, Miguel

AU - Stalcup, Thomas

AU - Angel, Roger

PY - 2004

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N2 - 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.

AB - 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.

KW - Adaptive optics

KW - Index matching

KW - Laser guide star

KW - MCAO

KW - Prism array

KW - Tomography

KW - Wavefront sensor

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Manufacture and use of a Shack-Hartmann sensor with a multifaceted prism for simultaneous sensing of multiple wavefronts

Abstract

Keywords

ASJC Scopus subject areas

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