Optical design for CETUS

A wide-field 1.5-m aperture UV payload being studied for a NASA probe class mission study

Robert A. Woodruff, William C. Danchi, Sara R. Heap, Tony Hull, Stephen E. Kendrick, Lloyd R. Purves, Michael S. Rhee, Eric Mentzell, Brian Fleming, Marty Valente, James H Burge, Ben Lewis, Kelly Dodson, Greg Mehle, Matt Tomic

Research output: Contribution to journalArticle

Abstract

As part of a study funded by NASA headquarters, we are developing a probe-class mission concept called the Cosmic Evolution through UV Spectroscopy (CETUS). CETUS includes a 1.5-m aperture diameter telescope with a large field of view (FOV). CETUS includes three scientific instruments: a far ultraviolet (FUV) and near ultraviolet (NUV) imaging camera (CAM); a NUV multiobject spectrograph (MOS); and a dual-channel point/slit spectrograph (PSS) in the Lyman ultraviolet (LUV), FUV, and NUV spectral regions. The large FOV three-mirror anastigmatic (TMA) optical telescope assembly (OTA) simultaneously feeds the three separate scientific instruments. That is, the instruments view separate portions of the TMA image plane, enabling parallel operation by the three instruments. The field viewed by the MOS, whose design is based on an Offner-type spectrographic configuration to provide wide FOV correction, is actively configured to select and isolate numerous field sources using a next-generation micro-shutter array. The two-channel CAM design is also based on an Offner-like configuration. The PSS performs high spectral resolution spectroscopy on unresolved objects over the NUV region with spectral resolving power, R ∼ 40,000, in an echelle mode. The PSS also performs long-slit imaging spectroscopy at R ∼ 20,000 in the LUV and FUV spectral regions with two aberration-corrected, blazed, holographic gratings used in a Rowland-like configuration. The optical system also includes two fine guidance sensors, and wavefront sensors that sample numerous locations over the full OTA FOV. In-flight wavelength calibration is performed by a wavelength calibration system, and flat-fielding is also performed, both using in-flight calibration sources. We describe the current optical design of CETUS and the major trade studies leading to the design.

Original languageEnglish (US)
Article number024006
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Volume5
Issue number2
DOIs
StatePublished - Apr 1 2019
Externally publishedYes

Fingerprint

Spectrographs
Optical design
Ultraviolet spectroscopy
payloads
NASA
apertures
spectroscopy
probe
Optical telescopes
field of view
spectrographs
slits
probes
Calibration
Ultraviolet spectrographs
Mirrors
Camera shutters
Cameras
Spectroscopy
telescopes

Keywords

  • Aberration-corrected Rowland spectrographs
  • Echelle spectrographs
  • Image error budgets
  • Imagers
  • Multiobject spectrographs
  • Optical design
  • Reflective telescopes
  • Space sensors
  • Ultraviolet sensors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Instrumentation
  • Astronomy and Astrophysics
  • Mechanical Engineering
  • Space and Planetary Science

Cite this

Optical design for CETUS : A wide-field 1.5-m aperture UV payload being studied for a NASA probe class mission study. / Woodruff, Robert A.; Danchi, William C.; Heap, Sara R.; Hull, Tony; Kendrick, Stephen E.; Purves, Lloyd R.; Rhee, Michael S.; Mentzell, Eric; Fleming, Brian; Valente, Marty; Burge, James H; Lewis, Ben; Dodson, Kelly; Mehle, Greg; Tomic, Matt.

In: Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 5, No. 2, 024006, 01.04.2019.

Research output: Contribution to journalArticle

Woodruff, RA, Danchi, WC, Heap, SR, Hull, T, Kendrick, SE, Purves, LR, Rhee, MS, Mentzell, E, Fleming, B, Valente, M, Burge, JH, Lewis, B, Dodson, K, Mehle, G & Tomic, M 2019, 'Optical design for CETUS: A wide-field 1.5-m aperture UV payload being studied for a NASA probe class mission study', Journal of Astronomical Telescopes, Instruments, and Systems, vol. 5, no. 2, 024006. https://doi.org/10.1117/1.JATIS.5.2.024006
Woodruff, Robert A. ; Danchi, William C. ; Heap, Sara R. ; Hull, Tony ; Kendrick, Stephen E. ; Purves, Lloyd R. ; Rhee, Michael S. ; Mentzell, Eric ; Fleming, Brian ; Valente, Marty ; Burge, James H ; Lewis, Ben ; Dodson, Kelly ; Mehle, Greg ; Tomic, Matt. / Optical design for CETUS : A wide-field 1.5-m aperture UV payload being studied for a NASA probe class mission study. In: Journal of Astronomical Telescopes, Instruments, and Systems. 2019 ; Vol. 5, No. 2.
@article{276cc3679a804c80b6fefb31027cef7d,
title = "Optical design for CETUS: A wide-field 1.5-m aperture UV payload being studied for a NASA probe class mission study",
abstract = "As part of a study funded by NASA headquarters, we are developing a probe-class mission concept called the Cosmic Evolution through UV Spectroscopy (CETUS). CETUS includes a 1.5-m aperture diameter telescope with a large field of view (FOV). CETUS includes three scientific instruments: a far ultraviolet (FUV) and near ultraviolet (NUV) imaging camera (CAM); a NUV multiobject spectrograph (MOS); and a dual-channel point/slit spectrograph (PSS) in the Lyman ultraviolet (LUV), FUV, and NUV spectral regions. The large FOV three-mirror anastigmatic (TMA) optical telescope assembly (OTA) simultaneously feeds the three separate scientific instruments. That is, the instruments view separate portions of the TMA image plane, enabling parallel operation by the three instruments. The field viewed by the MOS, whose design is based on an Offner-type spectrographic configuration to provide wide FOV correction, is actively configured to select and isolate numerous field sources using a next-generation micro-shutter array. The two-channel CAM design is also based on an Offner-like configuration. The PSS performs high spectral resolution spectroscopy on unresolved objects over the NUV region with spectral resolving power, R ∼ 40,000, in an echelle mode. The PSS also performs long-slit imaging spectroscopy at R ∼ 20,000 in the LUV and FUV spectral regions with two aberration-corrected, blazed, holographic gratings used in a Rowland-like configuration. The optical system also includes two fine guidance sensors, and wavefront sensors that sample numerous locations over the full OTA FOV. In-flight wavelength calibration is performed by a wavelength calibration system, and flat-fielding is also performed, both using in-flight calibration sources. We describe the current optical design of CETUS and the major trade studies leading to the design.",
keywords = "Aberration-corrected Rowland spectrographs, Echelle spectrographs, Image error budgets, Imagers, Multiobject spectrographs, Optical design, Reflective telescopes, Space sensors, Ultraviolet sensors",
author = "Woodruff, {Robert A.} and Danchi, {William C.} and Heap, {Sara R.} and Tony Hull and Kendrick, {Stephen E.} and Purves, {Lloyd R.} and Rhee, {Michael S.} and Eric Mentzell and Brian Fleming and Marty Valente and Burge, {James H} and Ben Lewis and Kelly Dodson and Greg Mehle and Matt Tomic",
year = "2019",
month = "4",
day = "1",
doi = "10.1117/1.JATIS.5.2.024006",
language = "English (US)",
volume = "5",
journal = "Journal of Astronomical Telescopes, Instruments, and Systems",
issn = "2329-4124",
publisher = "SPIE",
number = "2",

}

TY - JOUR

T1 - Optical design for CETUS

T2 - A wide-field 1.5-m aperture UV payload being studied for a NASA probe class mission study

AU - Woodruff, Robert A.

AU - Danchi, William C.

AU - Heap, Sara R.

AU - Hull, Tony

AU - Kendrick, Stephen E.

AU - Purves, Lloyd R.

AU - Rhee, Michael S.

AU - Mentzell, Eric

AU - Fleming, Brian

AU - Valente, Marty

AU - Burge, James H

AU - Lewis, Ben

AU - Dodson, Kelly

AU - Mehle, Greg

AU - Tomic, Matt

PY - 2019/4/1

Y1 - 2019/4/1

N2 - As part of a study funded by NASA headquarters, we are developing a probe-class mission concept called the Cosmic Evolution through UV Spectroscopy (CETUS). CETUS includes a 1.5-m aperture diameter telescope with a large field of view (FOV). CETUS includes three scientific instruments: a far ultraviolet (FUV) and near ultraviolet (NUV) imaging camera (CAM); a NUV multiobject spectrograph (MOS); and a dual-channel point/slit spectrograph (PSS) in the Lyman ultraviolet (LUV), FUV, and NUV spectral regions. The large FOV three-mirror anastigmatic (TMA) optical telescope assembly (OTA) simultaneously feeds the three separate scientific instruments. That is, the instruments view separate portions of the TMA image plane, enabling parallel operation by the three instruments. The field viewed by the MOS, whose design is based on an Offner-type spectrographic configuration to provide wide FOV correction, is actively configured to select and isolate numerous field sources using a next-generation micro-shutter array. The two-channel CAM design is also based on an Offner-like configuration. The PSS performs high spectral resolution spectroscopy on unresolved objects over the NUV region with spectral resolving power, R ∼ 40,000, in an echelle mode. The PSS also performs long-slit imaging spectroscopy at R ∼ 20,000 in the LUV and FUV spectral regions with two aberration-corrected, blazed, holographic gratings used in a Rowland-like configuration. The optical system also includes two fine guidance sensors, and wavefront sensors that sample numerous locations over the full OTA FOV. In-flight wavelength calibration is performed by a wavelength calibration system, and flat-fielding is also performed, both using in-flight calibration sources. We describe the current optical design of CETUS and the major trade studies leading to the design.

AB - As part of a study funded by NASA headquarters, we are developing a probe-class mission concept called the Cosmic Evolution through UV Spectroscopy (CETUS). CETUS includes a 1.5-m aperture diameter telescope with a large field of view (FOV). CETUS includes three scientific instruments: a far ultraviolet (FUV) and near ultraviolet (NUV) imaging camera (CAM); a NUV multiobject spectrograph (MOS); and a dual-channel point/slit spectrograph (PSS) in the Lyman ultraviolet (LUV), FUV, and NUV spectral regions. The large FOV three-mirror anastigmatic (TMA) optical telescope assembly (OTA) simultaneously feeds the three separate scientific instruments. That is, the instruments view separate portions of the TMA image plane, enabling parallel operation by the three instruments. The field viewed by the MOS, whose design is based on an Offner-type spectrographic configuration to provide wide FOV correction, is actively configured to select and isolate numerous field sources using a next-generation micro-shutter array. The two-channel CAM design is also based on an Offner-like configuration. The PSS performs high spectral resolution spectroscopy on unresolved objects over the NUV region with spectral resolving power, R ∼ 40,000, in an echelle mode. The PSS also performs long-slit imaging spectroscopy at R ∼ 20,000 in the LUV and FUV spectral regions with two aberration-corrected, blazed, holographic gratings used in a Rowland-like configuration. The optical system also includes two fine guidance sensors, and wavefront sensors that sample numerous locations over the full OTA FOV. In-flight wavelength calibration is performed by a wavelength calibration system, and flat-fielding is also performed, both using in-flight calibration sources. We describe the current optical design of CETUS and the major trade studies leading to the design.

KW - Aberration-corrected Rowland spectrographs

KW - Echelle spectrographs

KW - Image error budgets

KW - Imagers

KW - Multiobject spectrographs

KW - Optical design

KW - Reflective telescopes

KW - Space sensors

KW - Ultraviolet sensors

UR - http://www.scopus.com/inward/record.url?scp=85065473408&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85065473408&partnerID=8YFLogxK

U2 - 10.1117/1.JATIS.5.2.024006

DO - 10.1117/1.JATIS.5.2.024006

M3 - Article

VL - 5

JO - Journal of Astronomical Telescopes, Instruments, and Systems

JF - Journal of Astronomical Telescopes, Instruments, and Systems

SN - 2329-4124

IS - 2

M1 - 024006

ER -