WIYN bench upgrade: A revitalized spectrograph

M. Bershady; S. Bardenb; P. A. Blanche; D. Blancod; C. Corsond; 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

doi:10.1117/12.789112

WIYN bench upgrade: A revitalized spectrograph

M. Bershady, S. Bardenb, P. A. Blanche, D. Blancod, C. Corsond, 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

Optical Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

15 Scopus citations

Abstract

We describe the redesign and upgrade of the versatile fiber-fed Bench Spectrograph on the WIYN 3.5m telescope. The spectrograph is fed by either the Hydra multi-object positioner or integral-field units (IFUs) at two other ports, and can be configured with an adjustable camera-collimator angle to use low-order and echelle gratings. The upgrade, including a new collimator, charge-coupled device (CCD) and modern controller, and volume-phase holographic gratings (VPHG), has high performance-to-cost ratio by combining new technology with a system reconfiguration that optimizes throughput while utilizing as much of the existing instrument as possible. A faster, all-refractive collimator enhances throughput by 60%, nearly eliminates the slit-function due to vignetting, and improves image quality to maintain instrumental resolution. Two VPH gratings deliver twice the diffraction efficiency of existing surface-relief gratings: A 740 l/mm grating (float-glass and post-polished) used in 1st and 2nd-order, and a large 3300 l/mm grating (spectral resolution comparable to the R2 echelle). The combination of collimator, high-quantum efficiency (QE) CCD, and VPH gratings yields throughput gain-factors of up to 3.5.

Original language	English (US)
Title of host publication	Ground-based and Airborne Instrumentation for Astronomy II
DOIs	https://doi.org/10.1117/12.789112
State	Published - 2008
Event	Ground-based and Airborne Instrumentation for Astronomy II - Marseille, France Duration: Jun 23 2008 → Jun 28 2008

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	7014
ISSN (Print)	0277-786X

Other

Other	Ground-based and Airborne Instrumentation for Astronomy II
Country/Territory	France
City	Marseille
Period	6/23/08 → 6/28/08

Keywords

CCD performance
Fiber-fed spectrograph design
Volume phase holographic grating

ASJC Scopus subject areas

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

Access to Document

10.1117/12.789112

Cite this

Bershady, M., Bardenb, S., Blanche, P. A., Blancod, D., Corsond, C., Crawford, S., Glaspey, J., Habraken, S., Jacoby, G., Keyes, J., Knezek, P., Lemaire, P., Liang, M., McDougall, E., Poczulp, G., Sawyer, D., Westfall, K., & Willmarth, D. (2008). WIYN bench upgrade: A revitalized spectrograph. In Ground-based and Airborne Instrumentation for Astronomy II [70140H] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7014). https://doi.org/10.1117/12.789112

Bershady, M, Bardenb, S, Blanche, PA, Blancod, D, Corsond, C, Crawford, S, Glaspey, J, Habraken, S, Jacoby, G, Keyes, J, Knezek, P, Lemaire, P, Liang, M, McDougall, E, Poczulp, G, Sawyer, D, Westfall, K & Willmarth, D 2008, WIYN bench upgrade: A revitalized spectrograph. in Ground-based and Airborne Instrumentation for Astronomy II., 70140H, Proceedings of SPIE - The International Society for Optical Engineering, vol. 7014, Ground-based and Airborne Instrumentation for Astronomy II, Marseille, France, 6/23/08. https://doi.org/10.1117/12.789112

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title = "WIYN bench upgrade: A revitalized spectrograph",

abstract = "We describe the redesign and upgrade of the versatile fiber-fed Bench Spectrograph on the WIYN 3.5m telescope. The spectrograph is fed by either the Hydra multi-object positioner or integral-field units (IFUs) at two other ports, and can be configured with an adjustable camera-collimator angle to use low-order and echelle gratings. The upgrade, including a new collimator, charge-coupled device (CCD) and modern controller, and volume-phase holographic gratings (VPHG), has high performance-to-cost ratio by combining new technology with a system reconfiguration that optimizes throughput while utilizing as much of the existing instrument as possible. A faster, all-refractive collimator enhances throughput by 60%, nearly eliminates the slit-function due to vignetting, and improves image quality to maintain instrumental resolution. Two VPH gratings deliver twice the diffraction efficiency of existing surface-relief gratings: A 740 l/mm grating (float-glass and post-polished) used in 1st and 2nd-order, and a large 3300 l/mm grating (spectral resolution comparable to the R2 echelle). The combination of collimator, high-quantum efficiency (QE) CCD, and VPH gratings yields throughput gain-factors of up to 3.5.",

keywords = "CCD performance, Fiber-fed spectrograph design, Volume phase holographic grating",

author = "M. Bershady and S. Bardenb and Blanche, {P. A.} and D. Blancod and C. Corsond and S. Crawford and J. Glaspey and S. Habraken and G. Jacoby and J. Keyes and P. Knezek and P. Lemaire and M. Liang and E. McDougall and G. Poczulp and D. Sawyer and K. Westfall and D. Willmarth",

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doi = "10.1117/12.789112",

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series = "Proceedings of SPIE - The International Society for Optical Engineering",

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T2 - Ground-based and Airborne Instrumentation for Astronomy II

AU - Bershady, M.

AU - Bardenb, S.

AU - Blanche, P. A.

AU - Blancod, D.

AU - Corsond, C.

AU - Crawford, S.

AU - Glaspey, J.

AU - Habraken, S.

AU - Jacoby, G.

AU - Keyes, J.

AU - Knezek, P.

AU - Lemaire, P.

AU - Liang, M.

AU - McDougall, E.

AU - Poczulp, G.

AU - Sawyer, D.

AU - Westfall, K.

AU - Willmarth, D.

PY - 2008

Y1 - 2008

N2 - We describe the redesign and upgrade of the versatile fiber-fed Bench Spectrograph on the WIYN 3.5m telescope. The spectrograph is fed by either the Hydra multi-object positioner or integral-field units (IFUs) at two other ports, and can be configured with an adjustable camera-collimator angle to use low-order and echelle gratings. The upgrade, including a new collimator, charge-coupled device (CCD) and modern controller, and volume-phase holographic gratings (VPHG), has high performance-to-cost ratio by combining new technology with a system reconfiguration that optimizes throughput while utilizing as much of the existing instrument as possible. A faster, all-refractive collimator enhances throughput by 60%, nearly eliminates the slit-function due to vignetting, and improves image quality to maintain instrumental resolution. Two VPH gratings deliver twice the diffraction efficiency of existing surface-relief gratings: A 740 l/mm grating (float-glass and post-polished) used in 1st and 2nd-order, and a large 3300 l/mm grating (spectral resolution comparable to the R2 echelle). The combination of collimator, high-quantum efficiency (QE) CCD, and VPH gratings yields throughput gain-factors of up to 3.5.

AB - We describe the redesign and upgrade of the versatile fiber-fed Bench Spectrograph on the WIYN 3.5m telescope. The spectrograph is fed by either the Hydra multi-object positioner or integral-field units (IFUs) at two other ports, and can be configured with an adjustable camera-collimator angle to use low-order and echelle gratings. The upgrade, including a new collimator, charge-coupled device (CCD) and modern controller, and volume-phase holographic gratings (VPHG), has high performance-to-cost ratio by combining new technology with a system reconfiguration that optimizes throughput while utilizing as much of the existing instrument as possible. A faster, all-refractive collimator enhances throughput by 60%, nearly eliminates the slit-function due to vignetting, and improves image quality to maintain instrumental resolution. Two VPH gratings deliver twice the diffraction efficiency of existing surface-relief gratings: A 740 l/mm grating (float-glass and post-polished) used in 1st and 2nd-order, and a large 3300 l/mm grating (spectral resolution comparable to the R2 echelle). The combination of collimator, high-quantum efficiency (QE) CCD, and VPH gratings yields throughput gain-factors of up to 3.5.

KW - CCD performance

KW - Fiber-fed spectrograph design

KW - Volume phase holographic grating

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DO - 10.1117/12.789112

M3 - Conference contribution

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SN - 9780819472243

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Ground-based and Airborne Instrumentation for Astronomy II

Y2 - 23 June 2008 through 28 June 2008

ER -

WIYN bench upgrade: A revitalized spectrograph

Abstract

Publication series

Other

Keywords

ASJC Scopus subject areas

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