Mr. Robert S. Winsor Profile

Robert S. Winsor

Optical Scientist at Eritek Inc

SPIE Involvement:

Author

Publications (13)

Proceedings Article | 17 May 2006 Paper

Conformal beam steering apparatus for simultaneous manipulation of optical and radio frequency signals

R. Winsor, M. Braunstein

Proceedings Volume 6215, 62150G (2006) https://doi.org/10.1117/12.683325

KEYWORDS: Prisms, Silicon, Beam steering, Reflectivity, Refraction, Radio optics, Antireflective coatings, Silica, Space operations, Signal attenuation

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SPIE Journal Paper | 1 November 2004 Open Access

Pediatric Vision Screener 1: instrument design and operation

David Hunter, Deborah Nassif, Nadezhda Piskun, Robert Winsor, Boris Gramatikov, David Guyton

JBO, Vol. 9, Issue 06, (November 2004) https://doi.org/10.1117/12.10.1117/1.1805560

KEYWORDS: Eye, Sensors, Signal detection, Polarization, Control systems, Mirrors, Birefringence, Semiconductor lasers, Data acquisition, Photodetectors

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Proceedings Article | 12 October 2004 Paper

A tunable achromatic phase mask for a stellar coronagraph

Robert Winsor

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.563413

KEYWORDS: Silica, Silicon, Phase shifts, Point spread functions, Manufacturing, Coronagraphy, Tolerancing, Refraction, Nulling interferometry, Opacity

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Proceedings Article | 7 March 2003 Paper

Optical testing of diamond-machined aspheric mirrors for ground-based, near-IR astronomy

John Chambers, Ronald Mink, Raymond Ohl, Joseph Connelly, John Mentzell, Steven Arnold, Matthew Greenhouse, Robert Winsor, John MacKenty

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.458966

KEYWORDS: Mirrors, Computer generated holography, Wavefronts, Interferometers, Tolerancing, Space telescopes, Data modeling, Optical testing, Spectroscopy, Aluminum

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The Infrared Multi-Object Spectrometer (IRMOS) is a facility-class instrument for the Kitt Peak National Observatory 4 and 2.l meter telescopes. IRMOS is a near-IR (0.8-2.5 μm) spectrometer and operates at ~80 K. The 6061-T651 aluminum bench and mirrors constitute an athermal design. The instrument produces simultaneous spectra at low- to mid-resolving power (R = λ/Δλ = 300-3000) of ~100 objects in its 2.8×2.0 arcmin field. We describe ambient and cryogenic optical testing of the IRMOS mirrors across a broad range in spatial frequency (figure error, mid-frequency error, and microroughness). The mirrors include three rotationally symmetric, off-axis conic sections, one off-axis biconic, and several flat fold mirrors. The symmetric mirrors include convex and concave prolate and oblate ellipsoids. They range in aperture from 94×86 mm to 286×269 mm and in f-number from 0.9 to 2.4. The biconic mirror is concave and has a 94×76 mm aperture, R_x=377 mm, k_x=0.0778, R_y=407 mm, and k_y=0.1265 and is decentered by -2 mm in X and 227 mm in Y. All of the mirrors have an aspect ratio of approximately 6:1. The surface error fabrication tolerances are < 10 nm RMS microroughness, best effort for mid-frequency error, and < 63.3 nm RMS figure error. Ambient temperature (~293 K) testing is performed for each of the three surface error regimes, and figure testing is also performed at ~80 K. Operation of the ADE PhaseShift MicroXAM white light interferometer (micro-roughness) and the Bauer Model 200 profilometer (mid-frequency error) is described. Both the sag and conic values of the aspheric mirrors make these tests challenging. Figure testing is performed using a Zygo GPI interferometer, custom computer generated holograms (CGH), and optomechanical alignment fiducials. Cryogenic CGH null testing is discussed in detail. We discuss complications such as the change in prescription with temperature and thermal gradients. Correction for the effect of the dewar window is also covered. We discuss the error budget for the optical test and alignment procedure. Data reduction is accomplished using commercial optical design and data analysis software packages. Results from CGH testing at cryogenic temperatures are encouraging thus far.

Proceedings Article | 7 March 2003 Paper

IRMOS: an infrared multi-object spectrometer using a MEMs micromirror array

John MacKenty, Matthew Greenhouse, Richard Green, Leroy Sparr, Raymond Ohl, Robert Winsor

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461484

KEYWORDS: Mirrors, Sensors, Digital micromirror devices, Spectroscopy, Telescopes, Micromirrors, Space telescopes, Infrared spectroscopy, Microelectromechanical systems, Astronomical imaging

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Proceedings Article | 7 March 2003 Paper

Design and fabrication of diamond-machined aspheric mirrors for ground-based near-IR astronomy

Raymond Ohl, Werner Preuss, Alex Sohn, Shelly Conkey, Ken Garrard, John Hagopian, Joseph Howard, Jason Hylan, Sandra Irish, John Mentzell, Mechthild Schroeder, Leroy Sparr, Robert Winsor, Said Wahid Zewari, Matthew Greenhouse, John MacKenty

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.458967

KEYWORDS: Mirrors, Aluminum, Optical alignment, Spindles, Off axis mirrors, Tolerancing, Diamond, Space telescopes, Optical fabrication, Single point diamond turning

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Proceedings Article | 7 March 2003 Paper

Imaging performance and modeling of the infrared multi-object spectrometer focal reducer

Joseph Connelly, Raymond Ohl, Timo Saha, Theo Hadjimichael, John Mentzell, Ronald Mink, Jason Hylan, Leroy Sparr, John Chambers, John Hagopian, Matthew Greenhouse, Robert Winsor, John MacKenty

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.458974

KEYWORDS: Mirrors, Telescopes, Space telescopes, Wavefronts, Infrared spectroscopy, Optical alignment, Spectroscopy, Sensors, Light scattering, Tolerancing

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Proceedings Article | 7 February 2003 Paper

Shack-Hartmann wavefront sensor/detector with an integrated on-chip reconstructor

Robert Winsor, Anand Sivaramakrishnan

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459691

KEYWORDS: Phototransistors, Wavefront sensors, Wavefronts, Transistors, Sensors, Adaptive optics, Wavefront reconstruction, Very large scale integration, Amplifiers, Detector arrays

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Proceedings Article | 6 November 2002 Paper

Detector array for direct control of a deformable mirror

Robert Winsor, Anand Sivaramakrishnan, Gert Cauwenberghs, Marc Cohen, Margaret Frazier, Mike Kruger, Tim Myers

Proceedings Volume 4825, (2002) https://doi.org/10.1117/12.451966

KEYWORDS: Modulation, Phototransistors, Deformable mirrors, Detector arrays, Actuators, Mirrors, Light emitting diodes, Adaptive optics, Sensors, Phase retrieval

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Proceedings Article | 2 October 2000 Paper

Optical design for an infrared imaging multi-object spectrometer (IRMOS)

Robert Winsor, John MacKenty, Massimo Stiavelli, Matthew Greenhouse, John Mentzell, Raymond Ohl, Richard Green

Proceedings Volume 4092, (2000) https://doi.org/10.1117/12.402425

KEYWORDS: Mirrors, Spectroscopy, Telescopes, Optical design, Sensors, Space telescopes, Micromirrors, Infrared spectroscopy, Astronomical imaging, Off axis mirrors

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Proceedings Article | 7 July 2000 Paper

Ground-based coronagraphy with high-order adaptive optics

Russell Makidon, Anand Sivaramakrishnan, Christopher Koresko, Thomas Berkefeld, Marc Kuchner, Robert Winsor

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390396

KEYWORDS: Adaptive optics, Coronagraphy, Telescopes, Device simulation, Actuators, Gemini Observatory, Space telescopes, Computer simulations, Point spread functions, Systems modeling

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