The infrared imaging spectrograph (IRIS) for TMT: Design of image slicer

Kai Zhang; Yifei Zhou; Anna M. Moore; Eric Chisholm; James E. Larkin; Shelley Wright; Yongtian Zhu; Daniel J. Reiley; Zhongwen Hu

doi:10.1117/12.2312700

The infrared imaging spectrograph (IRIS) for TMT: Design of image slicer

Kai Zhang^*
, Yifei Zhou
, Anna M. Moore
, Eric Chisholm
, James E. Larkin
, Shelley Wright
, Yongtian Zhu
, Daniel J. Reiley
, Zhongwen Hu

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › peer-review

5 Citations (Scopus)

Abstract

The InfraRed Imaging Spectrograph (IRIS) is one of three first light science instruments for the Thirty Meter Telescope (TMT). It will provide dedicated function of imaging and integral field spectroscopic observations in parallel with the assistance of a Narrow Field InfraRed Adaptive Optics System (NFIRAOS). The IRIS imager delivers celestial light to a dual-channel Integral Field Spectrograph (IFS) through a pair of pick-off mirrors in the central field. The IFS creates multi-functional ability to explore the universe in IR (0.84 - 2.4um) with moderate spectral resolution of R=4,000/8,000 and four spaxel scales of 4, 9, 25, 50 milli-arc-seconds (mas). An image slicer serves one of the two spectral channels as its Integral Field Unit (IFU) in two coarse spaxel scales of 25 and 50mas over the continuous science fields of 2.2x1.125 arc-seconds (arcsec) and 4.4x2.25 arcsec respectively. It splits the field to 88 unit systems, and then re-images at two parallel slits in order to take full advantage of the detector (4Kx4K @ 15um). This paper describes a novel all-reflective design of image slicer, which uses a new '?brick stage' layout to stagger the adjacent mirrors and deliver image quality close to diffraction limit. The quasi-telecentric optical design gives more friendly interfaces with pre-optics and spectrograph than the conceptual design. Here, more technical issues are discussed to guide the further study on optical performance and fabrication feasibility.

Original language	English
Title of host publication	Ground-based and Airborne Instrumentation for Astronomy VII
Editors	Luc Simard, Luc Simard, Christopher J. Evans, Hideki Takami
Publisher	SPIE
ISBN (Print)	9781510619579
DOIs	https://doi.org/10.1117/12.2312700
Publication status	Published - 2018
Event	Ground-based and Airborne Instrumentation for Astronomy VII 2018 - Austin, United States Duration: 10 Jun 2018 → 14 Jun 2018

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10702
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Ground-based and Airborne Instrumentation for Astronomy VII 2018
Country/Territory	United States
City	Austin
Period	10/06/18 → 14/06/18

Access to Document

10.1117/12.2312700

Cite this

Zhang, K., Zhou, Y., Moore, A. M., Chisholm, E., Larkin, J. E., Wright, S., Zhu, Y., Reiley, D. J., & Hu, Z. (2018). The infrared imaging spectrograph (IRIS) for TMT: Design of image slicer. In L. Simard, L. Simard, C. J. Evans, & H. Takami (Eds.), Ground-based and Airborne Instrumentation for Astronomy VII Article 107029A (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10702). SPIE. https://doi.org/10.1117/12.2312700

@inproceedings{0d256dcec3c744ddbfe7bea8a4dfdf9d,

title = "The infrared imaging spectrograph (IRIS) for TMT: Design of image slicer",

abstract = "The InfraRed Imaging Spectrograph (IRIS) is one of three first light science instruments for the Thirty Meter Telescope (TMT). It will provide dedicated function of imaging and integral field spectroscopic observations in parallel with the assistance of a Narrow Field InfraRed Adaptive Optics System (NFIRAOS). The IRIS imager delivers celestial light to a dual-channel Integral Field Spectrograph (IFS) through a pair of pick-off mirrors in the central field. The IFS creates multi-functional ability to explore the universe in IR (0.84 - 2.4um) with moderate spectral resolution of R=4,000/8,000 and four spaxel scales of 4, 9, 25, 50 milli-arc-seconds (mas). An image slicer serves one of the two spectral channels as its Integral Field Unit (IFU) in two coarse spaxel scales of 25 and 50mas over the continuous science fields of 2.2x1.125 arc-seconds (arcsec) and 4.4x2.25 arcsec respectively. It splits the field to 88 unit systems, and then re-images at two parallel slits in order to take full advantage of the detector (4Kx4K @ 15um). This paper describes a novel all-reflective design of image slicer, which uses a new '?brick stage' layout to stagger the adjacent mirrors and deliver image quality close to diffraction limit. The quasi-telecentric optical design gives more friendly interfaces with pre-optics and spectrograph than the conceptual design. Here, more technical issues are discussed to guide the further study on optical performance and fabrication feasibility.",

keywords = "Image Slicer, Infrared Imaging Spectrograph, Integral Field Unit, Thirty Meter Telescope",

author = "Kai Zhang and Yifei Zhou and Moore, \{Anna M.\} and Eric Chisholm and Larkin, \{James E.\} and Shelley Wright and Yongtian Zhu and Reiley, \{Daniel J.\} and Zhongwen Hu",

note = "Publisher Copyright: {\textcopyright} 2018 SPIE.; Ground-based and Airborne Instrumentation for Astronomy VII 2018 ; Conference date: 10-06-2018 Through 14-06-2018",

year = "2018",

doi = "10.1117/12.2312700",

language = "English",

isbn = "9781510619579",

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

publisher = "SPIE",

editor = "Luc Simard and Luc Simard and Evans, \{Christopher J.\} and Hideki Takami",

booktitle = "Ground-based and Airborne Instrumentation for Astronomy VII",

address = "United States",

}

Zhang, K, Zhou, Y, Moore, AM, Chisholm, E, Larkin, JE, Wright, S, Zhu, Y, Reiley, DJ & Hu, Z 2018, The infrared imaging spectrograph (IRIS) for TMT: Design of image slicer. in L Simard, L Simard, CJ Evans & H Takami (eds), Ground-based and Airborne Instrumentation for Astronomy VII., 107029A, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10702, SPIE, Ground-based and Airborne Instrumentation for Astronomy VII 2018, Austin, United States, 10/06/18. https://doi.org/10.1117/12.2312700

The infrared imaging spectrograph (IRIS) for TMT: Design of image slicer. / Zhang, Kai; Zhou, Yifei; Moore, Anna M. et al.
Ground-based and Airborne Instrumentation for Astronomy VII. ed. / Luc Simard; Luc Simard; Christopher J. Evans; Hideki Takami. SPIE, 2018. 107029A (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10702).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › peer-review

TY - GEN

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T2 - Ground-based and Airborne Instrumentation for Astronomy VII 2018

AU - Zhang, Kai

AU - Zhou, Yifei

AU - Moore, Anna M.

AU - Chisholm, Eric

AU - Larkin, James E.

AU - Wright, Shelley

AU - Zhu, Yongtian

AU - Reiley, Daniel J.

AU - Hu, Zhongwen

PY - 2018

Y1 - 2018

N2 - The InfraRed Imaging Spectrograph (IRIS) is one of three first light science instruments for the Thirty Meter Telescope (TMT). It will provide dedicated function of imaging and integral field spectroscopic observations in parallel with the assistance of a Narrow Field InfraRed Adaptive Optics System (NFIRAOS). The IRIS imager delivers celestial light to a dual-channel Integral Field Spectrograph (IFS) through a pair of pick-off mirrors in the central field. The IFS creates multi-functional ability to explore the universe in IR (0.84 - 2.4um) with moderate spectral resolution of R=4,000/8,000 and four spaxel scales of 4, 9, 25, 50 milli-arc-seconds (mas). An image slicer serves one of the two spectral channels as its Integral Field Unit (IFU) in two coarse spaxel scales of 25 and 50mas over the continuous science fields of 2.2x1.125 arc-seconds (arcsec) and 4.4x2.25 arcsec respectively. It splits the field to 88 unit systems, and then re-images at two parallel slits in order to take full advantage of the detector (4Kx4K @ 15um). This paper describes a novel all-reflective design of image slicer, which uses a new '?brick stage' layout to stagger the adjacent mirrors and deliver image quality close to diffraction limit. The quasi-telecentric optical design gives more friendly interfaces with pre-optics and spectrograph than the conceptual design. Here, more technical issues are discussed to guide the further study on optical performance and fabrication feasibility.

AB - The InfraRed Imaging Spectrograph (IRIS) is one of three first light science instruments for the Thirty Meter Telescope (TMT). It will provide dedicated function of imaging and integral field spectroscopic observations in parallel with the assistance of a Narrow Field InfraRed Adaptive Optics System (NFIRAOS). The IRIS imager delivers celestial light to a dual-channel Integral Field Spectrograph (IFS) through a pair of pick-off mirrors in the central field. The IFS creates multi-functional ability to explore the universe in IR (0.84 - 2.4um) with moderate spectral resolution of R=4,000/8,000 and four spaxel scales of 4, 9, 25, 50 milli-arc-seconds (mas). An image slicer serves one of the two spectral channels as its Integral Field Unit (IFU) in two coarse spaxel scales of 25 and 50mas over the continuous science fields of 2.2x1.125 arc-seconds (arcsec) and 4.4x2.25 arcsec respectively. It splits the field to 88 unit systems, and then re-images at two parallel slits in order to take full advantage of the detector (4Kx4K @ 15um). This paper describes a novel all-reflective design of image slicer, which uses a new '?brick stage' layout to stagger the adjacent mirrors and deliver image quality close to diffraction limit. The quasi-telecentric optical design gives more friendly interfaces with pre-optics and spectrograph than the conceptual design. Here, more technical issues are discussed to guide the further study on optical performance and fabrication feasibility.

KW - Image Slicer

KW - Infrared Imaging Spectrograph

KW - Integral Field Unit

KW - Thirty Meter Telescope

UR - https://www.scopus.com/pages/publications/85052638372

U2 - 10.1117/12.2312700

DO - 10.1117/12.2312700

M3 - Conference Paper

SN - 9781510619579

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

BT - Ground-based and Airborne Instrumentation for Astronomy VII

A2 - Simard, Luc

A2 - Evans, Christopher J.

A2 - Takami, Hideki

PB - SPIE

Y2 - 10 June 2018 through 14 June 2018

ER -

Zhang K, Zhou Y, Moore AM, Chisholm E, Larkin JE, Wright S et al. The infrared imaging spectrograph (IRIS) for TMT: Design of image slicer. In Simard L, Simard L, Evans CJ, Takami H, editors, Ground-based and Airborne Instrumentation for Astronomy VII. SPIE. 2018. 107029A. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2312700

The infrared imaging spectrograph (IRIS) for TMT: Design of image slicer

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