Prof. Matthew A. Bershady Profile

Prof. Matthew A. Bershady

at Univ of Wisconsin-Madison

SPIE Involvement:

Author

Publications (31)

Proceedings Article | 18 July 2024 Poster + Paper

Early commissioning results of slit mask integral field units on the Southern African Large Telescope

Sabyasachi Chattopadhyay, Matthew Bershady

Proceedings Volume 13096, 130962R (2024) https://doi.org/10.1117/12.3017822

KEYWORDS: Spectrographs, Telescopes, Stars, Received signal strength, Prisms, Large telescopes, Equipment, Cameras, Vignetting, Light sources and illumination

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Proceedings Article | 18 July 2024 Poster + Paper

Optical performance prediction of the AMASE-P system

Yiuhung Cheung, Chit-Ho Hui, Renbin Yan, Matthew Bershady, Sabyasachi Chattopadhyay, Man-Yin Leo Lee, Ziming Peng, Michael Smith, Yiwei Liu, Egan Loubser

Proceedings Volume 13096, 130969Z (2024) https://doi.org/10.1117/12.3019778

KEYWORDS: Signal to noise ratio, Spectrographs, Point spread functions, Spectral resolution, Telescopes, Diffraction gratings, Vignetting, Interference (communication), Image analysis, Zemax

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Proceedings Article | 18 July 2024 Presentation + Paper

Southern African Large Telescope (SALT) instrumentation update

Lisa Crause, Marsha Wolf, Matthew Bershady, Michael Smith, Joshua Oppor, Moses Mogotsi, Richard McCracken, Yuk Shan Cheng, Daniel Holdsworth, Willem van der Westhuizen, Etienne Simon, Malcolm Scarrott, Derryck Reid, Sabyasachi Chattopadhyay, Craig Sass, Kurt Jaehnig, Jeff Percival, Ralf Kotulla, Anthony Koeslag, Enrico Kotze, Janus Brink, Deon Lategan, David A. Buckley, Lee Townsend, John Menzies, Kathryn Rosie, Rosalind Skelton, Danièl Groenewald, Eben Wiid, Nico van der Merwe, Melanie Saayman, Alexei Kniazev, Rudi Kuhn, Tasheen Naicker, Roufurd Julie, Encarni Romero Colmenero, Paul Rabe

Proceedings Volume 13096, 1309607 (2024) https://doi.org/10.1117/12.3018784

KEYWORDS: Equipment, Spectrographs, Telescopes, Calibration, Collimators, Cameras, Design, Near infrared, Large telescopes

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Proceedings Article | 18 July 2024 Poster + Paper

Design and status update of the AMASE-P project

Renbin Yan, Matthew Bershady, Sabyasachi Chattopadhyay, Yiuhung Cheung, Chit-Ho Hui, Man-Yin Leo Lee, Zhiheng Lin, Michael Smith, Egan Loubser, Kevin Bundy, Horace Tsz-Hong Hung, Xihan Ji, Yeeching Lam, Zesen Lin, Yiwei Liu, Yutong Qiao, Marsha Wolf, Kyle Westfall, Ricky Wai-Kiu Wong, Jichen Zhang, Ruoyu Zhou

Proceedings Volume 13096, 130967S (2024) https://doi.org/10.1117/12.3018127

KEYWORDS: Design, Spectrographs, Telescopes, Near field, Spectral resolution, Sensors, Equipment, Signal to noise ratio, Vignetting, Spectroscopy

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Proceedings Article | 18 July 2024 Poster + Paper

FiberPol-6D: spectropolarimetric integral field mode for SAAO 1.9 m telescope using fibers

Siddharth Maharana, Sabyasachi Chattopadhyay, Matthew Bershady

Proceedings Volume 13096, 130969U (2024) https://doi.org/10.1117/12.3018027

KEYWORDS: Polarimetry, Telescopes, Polarization, Design, Spectropolarimetry, Spectrographs, Optical design, Astronomy, Lenses, Optical fibers, Hyperspectral imaging

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Most optical spectropolarimeters built to date operate as long-slit or point-source instruments; they are inefficient for observations of extended objects such as galaxies and nebulae. 2D spectropolarimetry technique development is a major challenge in astronomical instrumentation. At the South African Astronomical Observatory’s (SAAO) FiberLab, we are developing a spectropolarimetry capable Integral Field front-end called FiberPol(-6D) for the existing SpUpNIC spectrograph on the SAAO’s 1.9 m telescope. SpUpNIC is a general purpose 2 arc-minute long-slit spectrograph with a grating suite covering the wavelength range from 350 to 1000 nm and at spectral resolutions between 500 and 6000. FiberPol generates 6D observational data: x-y spatial dimensions, wavelength, and the three linear Stokes parameters I, q and u. Using a rotating half-wave plate and a Wollaston prism, FiberPol executes two-channel polarimetry, and each channel is fed to an array of 14 fibers, corresponding to a field of view of 10 × 20 arcseconds² sampled with 2.9 arcsec diameter fiber cores. These fiber arrays are then rerouted to form a pseudo-slit input to SpUpNIC. FiberPol aims to achieve a polarimetric accuracy of 0.1% per spectral resolution bin. Further, it can also function as a non-polarimetric integral-field unit of size 20 × 20 arcseconds². The instrument design has been completed and it is currently being assembled and characterized in the lab. It is scheduled for on-sky commissioning in the second half of 2024. In this paper, we present the scientific and technical goals of FiberPol, its overall design and initial results from the lab assembly and testing. FiberPol is a low-cost technology demonstrator (< 10, 000 USD), and the entire system predominantly employs small size (one inch or less), commercial off-the-shelve optics and optomechanical components. It can be modified and replicated for use on any existing spectrograph, especially on bigger telescopes like the 10 m Southern African Large Telescope (SALT) and the upcoming 30 m class telescopes.

Proceedings Article | 18 July 2024 Poster + Paper

Light scrambling and focal ratio degradation of thin multimode fibers with different core geometries

Man-Yin Leo Lee, Zhiheng Lin, Chit-Ho Hui, Renbin Yan, YiuHung Cheung, Horace Tsz-Hong Hung, Matthew Bershady, Sabyasachi Chattopadhyay, Michael Smith

Proceedings Volume 13096, 1309668 (2024) https://doi.org/10.1117/12.3016312

KEYWORDS: Near field, Spectrographs, Astronomy, Specular reflections, Multimode fibers, Galactic astronomy, Optical fibers

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Proceedings Article | 29 August 2022 Poster + Paper

The design and construction of the fiber instrument feed for the SALT NIR integral field spectrograph

Michael P. Smith, Joshua E. Oppor, Matthew A. Bershady, Marsha J. Wolf, Sabyasachi Chattopadhyay, Kurt Jaehnig, Jeffrey Percival, Mark Mulligan, Kathleen Jurgella, Briana Wirag, Andromeda Swissdorf

Proceedings Volume 12188, 121885N (2022) https://doi.org/10.1117/12.2630399

KEYWORDS: Spectrographs, Telescopes, Near infrared, Polishing, Mirrors, Collimators, Astatine, Observatories, Interfaces, Astronomy

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Proceedings Article | 29 August 2022 Poster + Paper

Performance testing and end-to-end mapping of the fiber cable on the SALT NIR integral field spectrograph

Joshua Oppor, Matthew A. Bershady, Marsha J. Wolf, Michael P. Smith, Sabyasachi Chattopadhyay, Kurt Jaehnig, Jeffrey Percival, Mark Mulligan, Kathleen Jurgella, Briana Wirag

Proceedings Volume 12188, 121885P (2022) https://doi.org/10.1117/12.2630176

KEYWORDS: Polishing, Spectrographs, Surface finishing, Epoxies, Telescopes, Prototyping, Near infrared, Calibration, Collimators, Fiber optics

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Proceedings Article | 29 August 2022 Poster + Paper

Slit mask integral field units for the Southern African Large Telescope

Sabyasachi Chattopadhyay, Matthew Bershady, Marsha Wolf, Michael Smith

Proceedings Volume 12184, 121845V (2022) https://doi.org/10.1117/12.2629826

KEYWORDS: Polishing, Spectrographs, Spectral resolution, Prisms, Received signal strength, Telescopes, Large telescopes, Beam splitters, Galactic astronomy, Collimators

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Proceedings Article | 29 August 2022 Presentation + Paper

Laboratory performance and commissioning status of the SALT NIR integral field spectrograph

Marsha Wolf, Matthew Bershady, Michael Smith, Kurt Jaehnig, Jeffrey Percival, Joshua Oppor, Mark Mulligan, Ron Koch

Proceedings Volume 12184, 1218407 (2022) https://doi.org/10.1117/12.2630242

KEYWORDS: Optical fibers, Near infrared, Cameras, Spectrographs, Telescopes, Optical filters, Collimators, Cryogenics, Lenses

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SPIE Journal Paper | 5 May 2022

Optimum telescope focal ratios for microlens-to-fiber coupled integral field spectrographs

Sabyasachi Chattopadhyay, Matthew Bershady, Marsha Wolf, Michael Smith

JATIS, Vol. 8, Issue 02, 025001, (May 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.2.025001

KEYWORDS: Telescopes, Microlens, Diffraction, Spectrographs, Zemax, Performance modeling, Manufacturing, Systems modeling, Monochromatic aberrations, Collimators

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Proceedings Article | 16 December 2020 Poster + Presentation + Paper

Optimization of telescope focal ratios for MLA-fiber coupled integral field units

Sabyasachi Chattopadhyay, Matthew Bershady, Marsha Wolf, Michael Smith

Proceedings Volume 11451, 1145168 (2020) https://doi.org/10.1117/12.2562900

KEYWORDS: Telescopes, Optical fibers, Spectrographs, Spectroscopy, Astronomical imaging, Field spectroscopy, Imaging spectroscopy, Step index fibers, Manufacturing, Optical components

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Proceedings Article | 13 December 2020 Presentation + Paper

SDSS-V local volume mapper instrument: overview and status

Nicholas Konidaris, Niv Drory, Cynthia Froning, Anthony Hebert, Pavan Bilgi, Guillermo Blanc, Alicia Lanz, Charles Hull, Juna Kollmeier, Solange Ramirez, Stefanie Wachter, Kathryn Kreckel, Soojong Pak, Eric Pellegrini, Andrés Almeida, Scott Case, Ross Zhelem, Tobas Feger, Jon Lawrence, Michael Lesser, Tom Herbst, José Sanchez-Gallego, Matthew Bershady, Sabyasachi Chattopadhyay, Andrew Hauser, Michael Smith, Marsha Wolf, Renbin Yan

Proceedings Volume 11447, 1144718 (2020) https://doi.org/10.1117/12.2557565

KEYWORDS: Telescopes, Spectrographs, Spectroscopes, Stars, Solar system, Lanthanum, Observatories, Clouds, Spectral resolution, Atmospheric sciences

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Proceedings Article | 13 December 2020 Poster + Paper

Development and characterization of a precisely adjustable fiber polishing arm

Michael Smith, Sabyasachi Chattopadhyay, Andrew Hauser, Joshua Oppor, Matthew Bershady, Marsha Wolf

Proceedings Volume 11451, 114516W (2020) https://doi.org/10.1117/12.2563201

KEYWORDS: Polishing, Surface finishing, Astronomy, Spectrographs, Inspection, Matrices, Near infrared, Spectral calibration, Calibration, Interfaces

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

The prototype telescope and spectrograph system for the AMASE project

Renbin Yan, Matthew Bershady, Michael Smith, Nicholas MacDonald, Dmitry Bizyaev, Kevin Bundy, Sabaysachi Chattopadhyay, James Gunn, Kyle Westfall, Marsha Wolf

Proceedings Volume 11447, 114478Y (2020) https://doi.org/10.1117/12.2563195

KEYWORDS: Spectrographs, Prototyping, Telescopes, Optical instrument design, Spectroscopy, Lenses, Field spectroscopy, Spatial resolution, Spectral resolution, CMOS sensors

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SPIE Journal Paper | 27 June 2020 Open Access

Fiber positioning in microlens-fiber coupled integral field unit

Sabyasachi Chattopadhyay, Matthew Bershady, Marsha Wolf, Michael Smith, Andrew Hauser

JATIS, Vol. 6, Issue 02, 025002, (June 2020) https://doi.org/10.1117/12.10.1117/1.JATIS.6.2.025002

KEYWORDS: Etching, Semiconducting wafers, Microlens, Photoresist materials, Optical lithography, Silicon, Photomasks, Telescopes, Near field, Spectrographs

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A generic fiber positioning strategy and a fabrication path are presented for microlens-fiber-coupled integral field units (IFUs). It is assumed that microlens-produced microimages are carried to the spectrograph input through a step-index, multimode fiber, but our results apply to micropupil reimaging applications as well. Considered are the performance trades between the filling percentage of the fiber core with the microimage versus throughput and observing efficiency. A merit function is defined as the product of the transmission efficiency and the étendue loss. For a hexagonal packing of spatial elements, the merit function has been found to be maximized to 94% of an ideal fiber IFU merit value (which has zero transmission loss and does not increase the étendue) with a microlens-fiber alignment (centering) tolerance of 1-μm RMS. The maximum acceptable relative tilt between the fiber and the microlens face has been analyzed through optical modeling and found to be 0.3 deg RMS for input f-ratio slower than f / 3.5, but it is much more relaxed for faster beams. From the acceptable tilt, we have deduced a minimum thickness of the fiber holder to be 3 mm for 5 μm clearance in hole diameter relative to the fiber outer diameter. Several options of fabricating fiber holders have been compared to identify cost-effective solutions that deliver the desired fiber positioning accuracy. Femto-second laser-drilling methods from commercial vendors deliver holes arrayed on plates with a relative position accuracy of ±1.5-μm RMS, similar diameter accuracy, and with an aspect ratio of 1:10 (diameter:thickness). One commercial vendor combines femtosecond laser-drilling with photolithographic etching to produce plates with thickness of 5 mm, but with similar (±1-μm RMS) positioning accuracy and conical entry ports. Both of these techniques are found to be moderately expensive. A purely photolithographic technique performed at Wisconsin Center for Advanced Microelectronics (a facility at the University of Wisconsin, Madison), in tandem with deep reactive ion etching, has been used to produce a repeatable recipe with 100% yield. Photolithography is more precise (0.5-μm RMS) in terms of hole positioning and similar diameter accuracy (1-μm RMS) but the plate can only have a thickness of 250 μm.

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Proceedings Article | 6 July 2018 Paper

A Near Infrared Integral Field spectrograph (NIR) for the Southern African Large Telescope (SALT): mechanical design

Michael Smith, Marsha Wolf, Matthew Bershady, Douglas Adler, Kurt Jaehnig, Ron Koch, Mark Mulligan, Joshua Oppor, Jeffrey Percival, Nelli Aydinyan, Andrew Hauser, Elijah Ruder

Proceedings Volume 10702, 107023C (2018) https://doi.org/10.1117/12.2313906

KEYWORDS: Spectrographs, Near infrared, Telescopes, Collimators, Control systems, Space telescopes, Large telescopes, Mechanical engineering, Astronomy, Spectroscopy

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Washburn Astronomical Laboratories in the University of Wisconsin-Madison Astronomy Department is developing a near infrared (NIR) integral field spectrograph for the 11-meter Southern African Large Telescope (SALT). This instrument will extend SALT’s capabilities into the NIR, providing medium resolution spectroscopy over the wavelength range of 0.8 to 1.7 microns. Formerly known as RSS-NIR, this spectrograph was originally designed to mount at the prime focus of SALT and share a common collimator and spaceframe structure with the visible wavelength Robert Stobie Spectrograph (RSS-VIS). However, to maximize performance of both the instrument and telescope, its configuration has been changed into a fiber fed instrument located in the spectrometer room below the telescope7. This change necessitated the addition of several new components, including a separate collimator; a fiber integral field unit (IFU); a means to inject light from the telescope into the fibers; and a cooled enclosure to house the spectrograph, collimator, and pseudo-slit end of the fiber cable. The new collimator consists of four refractive elements, one of which is calcium fluoride, and requires a new lens barrel and support structure. The new fiber system incorporates a hexagonally arranged 217-fiber IFU and two mini-bundles containing 15 sky fibers each. The IFU is fabricated out of a two-part clam-shell stainless steel ferrule. The existing SALT fiber instrument feed (FIF) mechanism is adapted to position the IFU and sky bundles on sky, while a slave motion on flexure pivots ensures that the fibers remain telecentric. A 42-m protected fiber cable spans the distance between the telescope prime focus and the pseudo-slit in the spectrometer room. The cable is constructed out of four 25mm outer diameter flexible conduits. Within the conduit, each fiber is individually protected in its own Teflon tube. The route of the fiber cable through the telescope requires careful accommodation of controlled bending. The pseudo-slit comprises a line of mini v-groove blocks attached to the slit plate. The slit, collimator, and spectrograph are housed inside a 40 cold enclosure in the SALT spectrometer room. The cooling system, developed by Norlake Scientific to our specifications, carefully controls against thermal shock and humidity. This paper describes the design, integration, and laboratory verification of the reconfigured spectrograph system, as well as our experiences operating in a -40 ambient pressure environment.

Proceedings Article | 6 July 2018 Paper

A near infrared integral field spectrograph for the Southern African Large Telescope (SALT)

Marsha Wolf, Douglas Adler, Matthew Bershady, Kurt Jaehnig, Ron Koch, Mark Mulligan, Joshua Oppor, Jeffrey Percival, Michael Smith, Nelli Aydinyan, Andrew Hauser, Elijah Ruder

Proceedings Volume 10702, 107022O (2018) https://doi.org/10.1117/12.2312792

KEYWORDS: Near infrared, Collimators, Optical fibers, Galactic astronomy, Spectrographs, Diffraction gratings, Telescopes, Sensors, Spectroscopy, Cameras

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Proceedings Article | 22 July 2016 Paper

Pupil Scrambling Integral Field Unit (PSI) for the Robert Stobie Spectrograph on SALT

Michael Smith, Marsha Wolf, Matthew Bershady, Guangwei Fu, Longji Bing

Proceedings Volume 9912, 99125B (2016) https://doi.org/10.1117/12.2233102

KEYWORDS: Optical fibers, Prisms, Received signal strength, Galactic astronomy, Spectrographs, Telescopes, Diffraction gratings, Near field, Mirrors, Diffraction

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Proceedings Article | 8 July 2014 Paper

Project status of the Robert Stobie spectrograph near infrared instrument (RSS-NIR) for SALT

Marsha Wolf, Mark Mulligan, Michael Smith, Douglas Adler, Curtis Bartosz, Matthew Bershady, David Buckley, Mahesh Burse, Pravin Chordia, J. Christopher Clemens, Harland Epps, Kristine Garot, Briana Indahl, Kurt Jaehnig, Ron Koch, William Mason, Gregory Mosby, Kenneth Nordsieck, Jeffrey Percival, Sujit Punnadi, Anamparambu Ramaprakash, J. Alan Schier, Andrew Sheinis, Stephen Smee, Donald Thielman, Mark Werner, Theodore Williams, Jeffrey Wong

Proceedings Volume 9147, 91470B (2014) https://doi.org/10.1117/12.2056736

KEYWORDS: Sensors, Cameras, Near infrared, Diffraction gratings, Beam splitters, Optical filters, Collimators, Received signal strength, Spectroscopes, Telescopes

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Proceedings Article | 24 September 2012 Paper

HexPak and GradPak: variable-pitch dual-head IFUs for the WIYN 3.5m Telescope Bench Spectrograph

Corey Wood, Matthew Bershady, Arthur Eigenbrot, Scott Buckley, John Gallagher, Eric Hooper, Andrew Sheinis, Michael Smith, Marsha Wolf

Proceedings Volume 8446, 84462W (2012) https://doi.org/10.1117/12.926580

KEYWORDS: Head, Galactic astronomy, Spectrographs, Telescopes, Polishing, Capillaries, Optical instrument design, Spectral resolution, Fiber science, Prototyping

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Proceedings Article | 24 September 2012 Paper

The impact of surface-polish on the angular and wavelength dependence of fiber focal ratio degradation

Arthur Eigenbrot, Matthew Bershady, Corey Wood

Proceedings Volume 8446, 84465W (2012) https://doi.org/10.1117/12.926568

KEYWORDS: Polishing, Surface finishing, Light scattering, Scattering, Data modeling, Laser scattering, Lamps, Spectrographs, Telescopes, Astronomy

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Proceedings Article | 21 July 2010 Paper

Performance predictions for the Robert Stobie spectrograph near infrared arm on SALT

Marsha Wolf, Andrew Sheinis, Theodore Williams, Kenneth Nordsieck, Matthew Bershady

Proceedings Volume 7735, 77357V (2010) https://doi.org/10.1117/12.858226

KEYWORDS: Fabry–Perot interferometers, Near infrared, Spectroscopes, Telescopes, Sensors, Mirrors, Visible radiation, Beam splitters, Polarimetry, Polarization

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Proceedings Article | 21 July 2010 Paper

The upgraded WIYN bench spectrograph

Patricia Knezek, Matthew Bershady, Daryl Willmarth, John Glaspey, Gary Poczulp, Dan Blanco, Lana Britanik, Eugene McDougall, Charles Corson, Ming Liang, Joe Keyes, George Jacoby

Proceedings Volume 7735, 77357D (2010) https://doi.org/10.1117/12.857648

KEYWORDS: Spectrographs, Collimators, Cameras, Telescopes, Charge-coupled devices, Optical filters, Astronomy, Vignetting, Lamps, Volume holography

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Proceedings Article | 20 July 2010 Paper

Science capabilities of the Robert Stobie Spectrograph near infrared arm on SALT

Andrew Sheinis, Marsha Wolf, Matthew Bershady, Kenneth Nordsieck, Ryan Doering, Theodore Williams

Proceedings Volume 7735, 77354U (2010) https://doi.org/10.1117/12.858171

KEYWORDS: Near infrared, Galactic astronomy, Stars, Fabry–Perot interferometers, Telescopes, Spectral resolution, Received signal strength, Imaging spectroscopy, Near infrared spectroscopy, Visible radiation

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Proceedings Article | 25 July 2008 Paper

SixPak: a wide-field IFU for the William Herschel Telescope

Lars Venema, Ton Schoenmaker, Marc Verheijen, Scott Trager, René Rutten, Matthew Bershady, Søren Larsen, Reynier Peletier, Marco Spaans

Proceedings Volume 7014, 70140L (2008) https://doi.org/10.1117/12.789130

KEYWORDS: Galactic astronomy, Telescopes, Spectrographs, Spectral resolution, Spectroscopy, Cameras, Sensors, Collimators, Microlens, Mirrors

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Proceedings Article | 9 July 2008 Paper

Investigation of focal ratio degradation in optical fibres for astronomical instrumentation

Lisa Crause, Matthew Bershady, David Buckley

Proceedings Volume 7014, 70146C (2008) https://doi.org/10.1117/12.791041

KEYWORDS: Optical filters, Ultraviolet radiation, Polishing, Image quality, Telescopes, Optical fibers, Astronomy, Spectrographs, Collimation, Bandpass filters

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Proceedings Article | 9 July 2008 Paper

Optical-mechanical operation of the F2T2 filter: a tunable filter designed to search for First Light

Erin Mentuch, Alan Scott, Roberto Abraham, Elizabeth Barton, Matthew Bershady, Joss Bland-Hawthorn, David Crampton, René Doyon, Steve Eikenberry, Mike Gladders, Karl Glazebrook, Joe Jenson, Jeff Julian, Roger Julian, Jean-Paul Kneib, David Loop, Nick Raines, Neil Rowlands, J. D. Smith

Proceedings Volume 7014, 701476 (2008) https://doi.org/10.1117/12.789692

KEYWORDS: Fabry–Perot interferometers, Tunable filters, Optical filters, Calibration, Gemini Observatory, Galactic astronomy, James Webb Space Telescope, Observatories, Image filtering, Spectroscopy

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Proceedings Article | 9 July 2008 Paper

WIYN bench upgrade: a revitalized spectrograph

M. Bershady, S. Barden, P.-A. Blanche, D. Blanco, C. Corson, S. Crawford, J. Glaspey, S. Habraken, G. Jacoby, J. Keyes, P. Knezek, P. Lemaire, M. Liang, E. McDougall, G. Poczulp, D. Sawyer, K. Westfall, D. Willmarth

Proceedings Volume 7014, 70140H (2008) https://doi.org/10.1117/12.789112

KEYWORDS: Collimators, Spectrographs, Cameras, Charge-coupled devices, Diffraction gratings, Spectral resolution, Telescopes, Quantum efficiency, Imaging systems, Image quality

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Proceedings Article | 28 June 2006 Paper

The NIR upgrade to the SALT Robert Stobie Spectrograph

Andrew Sheinis, Marsha Wolf, Matthew Bershady, David Buckley, Kenneth Nordsieck, Ted Williams

Proceedings Volume 6269, 62694T (2006) https://doi.org/10.1117/12.673533

KEYWORDS: Near infrared, Cameras, Visible radiation, Fabry–Perot interferometers, Spectrographs, Received signal strength, Sensors, Galactic astronomy, Imaging spectroscopy, Spectroscopy

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Proceedings Article | 27 June 2006 Paper

Performance of F2T2 tandem tunable etalon

Alan Scott, Maniyar Javed, Roberto Abraham, Steve Eikenberry, Elizabeth Barton, Matthew Bershady, Joss Bland-Hawthorn, David Crampton, Rene Doyon, Jeff Julian, Roger Julian, Jean-Paul Kneib, David Loop, Nick Raines, Neil Rowlands, J. Smith

Proceedings Volume 6269, 62695J (2006) https://doi.org/10.1117/12.668774

KEYWORDS: Fabry–Perot interferometers, Gemini Observatory, Spectral resolution, Calibration, Space telescopes, Telescopes, Control systems, Electronics, Device simulation, Digital signal processing

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Showing 5 of 31 publications

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