Mr. Joseph A. Connelly Profile

Joseph A. Connelly

Optical Engineer at NASA Goddard Space Flight Ctr

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Publications (11)

Proceedings Article | 29 August 2009 Paper

Pupil alignment reference (PAR) for the Mid-Infrared Instrument (MIRI) for optical alignment and verification on the Integrated Science Instrument Module (ISIM) in James Webb Space Telescope (JWST)

Cagatay Aymergen, Phillip Driggers, Raymond Ohl, Ray Lundquist, Pam Davila, Brent Bos, Scott Antonille, David Kubalak, Suong Le, Leonard Hanssen, Vilem Mikula, Claef Hakun, Corina Guishard, Jeffrey Guzek, Joe Connelly, Joseph McMann

Proceedings Volume 7433, 74330P (2009) https://doi.org/10.1117/12.826286

KEYWORDS: James Webb Space Telescope, Optical alignment, Interfaces, Cryogenics, Bidirectional reflectance transmission function, Inspection, Space telescopes, Reflectivity, Mirrors, Telescopes

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Proceedings Article | 22 August 2009 Paper

Optical metrology of the JWST Integrated Science Instrument Module test platform

Joseph Stock, Joseph Connelly, Maria Nowak, Gregory Wenzel, Kevin Redman

Proceedings Volume 7433, 743304 (2009) https://doi.org/10.1117/12.824237

KEYWORDS: Calibration, Cryogenics, Metrology, Information technology, Interfaces, Cameras, James Webb Space Telescope, Spherical lenses, Optical alignment, Photogrammetry

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Proceedings Article | 2 September 2008 Paper

Optical metrology and alignment of the James Webb Space Telescope Integrated Science Instrument Module

Joseph Connelly, Brent Bos, Pamela Davila, William Eichhorn, Bradley Frey, John Hagopian, Jason Hylan, James Marsh, Douglas McGuffey, Joseph McMann, Maria Nowak, Raymond Ohl, Kevin Redman, Derek Sabatke, Henry Sampler, Joseph Stock, Joseph Sullivan, Gregory Wenzel, Geraldine Wright, Philip Young

Proceedings Volume 7068, 70680F (2008) https://doi.org/10.1117/12.798778

KEYWORDS: Interfaces, Optical alignment, James Webb Space Telescope, Metrology, Cryogenics, Mirrors, Photogrammetry, Optical components, Cameras, Optical tracking

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Proceedings Article | 22 July 2008 Paper

Characterization of the detector subsystem for the near-infrared spectrograph (NIRSpec) on the James Webb Space Telescope

D. Brent Mott, Augustyn Waczynski, Yiting Wen, Bernard Rauscher, Nicholas Boehm, Meng Chiao, Lantrinh Degumbia, Greg Delo, Roger Foltz, Emily Kan, David Alexander, Craig Cabelli, Brian Clemons, Joseph Connelly, Alex Dea, Rebecca Derro, Charles Engler, Ali Feizi, Ori Fox, Robert Hill, Thomas Johnson, Matthew Lander, Don Lindler, Markus Loose, Sridhar Manthripragada, Kevin Novo-Gradac, Wayne Roher, Robert Rosenberry, Kamdin Shakoorzadeh, Miles Smith, Donna Wilson, Joseph Zino

Proceedings Volume 7021, 702127 (2008) https://doi.org/10.1117/12.789099

KEYWORDS: Sensors, Staring arrays, James Webb Space Telescope, Electronics, Integrating spheres, Spectrographs, Interference (communication), Integrated optics, Hardware testing, Quantum efficiency

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Proceedings Article | 7 September 2006 Paper

Stray light reduction in testing of NIRSpec subsystems: the focal plane array and micro-shutter assembly

Joseph Connelly, Theo Hadjimichael, Rene Boucarut, June Tveekrem, D. Brent Mott

Proceedings Volume 6291, 62910V (2006) https://doi.org/10.1117/12.678513

KEYWORDS: Camera shutters, Stray light, Sensors, Staring arrays, Optical testing, James Webb Space Telescope, Infrared radiation, Cryogenics, Fiber optic illuminators, Space telescopes

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Proceedings Article | 12 October 2004 Paper

Detectors for the James Webb Space Telescope near-infrared spectrograph

Bernard Rauscher, Donald Figer, Michael Regan, Torsten Boeker, James Garnett, Robert Hill, Giorgio Bagnasco, Jesus Balleza, Richard Barney, Louis Bergeron, Clifford Brambora, Joe Connelly, Rebecca Derro, Michael DiPirro, Christina Doria-Warner, Aprille Ericsson, Stuart Glazer, Charles Greene, Donald Hall, Shane Jacobson, Peter Jakobsen, Eric Johnson, Scott Johnson, Carolyn Krebs, Danny Krebs, Scott Lambros, Blake Likins, Sridhar Manthripragada, Robert Martineau, Ernie Morse, Samuel Moseley, D. Brent Mott, Theo Muench, Hongwoo Park, Susan Parker, Elizabeth Polidan, Robert Rashford, Kamdin Shakoorzadeh, Rajeev Sharma, Paolo Strada, Augustyn Waczynski, Yiting Wen, Selmer Wong, John Yagelowich, Monica Zuray

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.549573

KEYWORDS: Sensors, James Webb Space Telescope, Staring arrays, Calibration, Spectrographs, Readout integrated circuits, Electronics, Detector development, Clocks, Mercury cadmium telluride

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Proceedings Article | 30 September 2004 Paper

Integration, testing, and performance of the Infrared Multi-Object Spectrometer

Raymond Ohl, Joseph Connelly, Robert Boyle, Rebecca Derro, Danette Fitzgerald, Matthew Greenhouse, Timothy Madison, John Mentzell, Brian Nord, Leroy Sparr, Jason Hylan, Knute Ray, John MacKenty

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.551494

KEYWORDS: Mirrors, Telescopes, Digital micromirror devices, Optical alignment, Infrared spectroscopy, Optical design, Point spread functions, Spectroscopy, Space telescopes, James Webb Space Telescope

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Proceedings Article | 15 October 2003 Paper

Alignment of the grating wheel mechanism for a ground-based cryogenic near-infrared astronomy instrument

Sharon Gutkowski, Raymond Ohl, Jason Hylan, John Hagopian, Stephen Kraft, J. Mentzell, Joseph Connelly, Joseph Schepis, Leroy Sparr, Matthew Greenhouse, John MacKenty

Proceedings Volume 5172, (2003) https://doi.org/10.1117/12.503506

KEYWORDS: Optical alignment, Mirrors, Tolerancing, Cryogenics, Liquid crystals, Telescopes, Computer aided design, Metrology, James Webb Space Telescope

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Proceedings Article | 15 October 2003 Paper

Alignment and performance of the Infrared Multi-Object Spectrometer

Joseph Connelly, Raymond Ohl, J. Mentzell, Timothy Madison, Jason Hylan, Ronald Mink, Timo Saha, June Tveekrem, Leroy Sparr, Victor Chambers, Danette Fitzgerald, Matthew Greenhouse, John MacKenty

Proceedings Volume 5172, (2003) https://doi.org/10.1117/12.503984

KEYWORDS: Mirrors, Telescopes, Sensors, Space telescopes, Infrared spectroscopy, Infrared radiation, Point spread functions, Spectroscopy, Optical alignment, Infrared imaging

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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 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.

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