Prime Focus Spectrograph (PFS): The metrology camera system

Shiang Yu Wang; Chueh Yi Chou; Yin Chang Chang; Pin Jie Huang; Jennifer Karr; Chi Hung Yan; James E. Gunn; Craig Loomis; Robert Lupton; Hassan Siddiqui; Shu Fu Hsu; Yen Shan Hu; Daniel J. Reiley; Naoyuki Tamura; Yuki Moritani; Naruhisa Takato

doi:10.1117/12.2561191

Prime Focus Spectrograph (PFS): The metrology camera system

Shiang Yu Wang, Chueh Yi Chou, Yin Chang Chang, Pin Jie Huang, Jennifer Karr, Chi Hung Yan, James E. Gunn, Craig Loomis, Robert Lupton, Hassan Siddiqui, Shu Fu Hsu, Yen Shan Hu, Daniel J. Reiley, Naoyuki Tamura, Yuki Moritani, Naruhisa Takato

Astrophysical Sciences

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

5 Scopus citations

Abstract

The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of the 8.2m Subaru telescope. PFS will cover a 1.3 degree diameter field with 2394 fibers to complement the imaging capabilities of Hyper SuprimeCam. To retain high throughput, the final positioning accuracy between the fibers and observing targets of PFS is required to be less than 10 µm. The metrology camera system (MCS) serves as the optical encoder of the fiber positioners for configuring of fibers. The MCS locates at the Cassegrain focus of the Subaru telescope to cover the whole focal plane with one 50M pixel CMOS sensor. The information from MCS will be fed into the fiber positioner control system for closed loop control. The MCS was delivered to Subaru Observatory in Apr. 2018 and it had two engineering runs in Oct. 2018 and Aug. 2019. The 1^st engineering run concluded that the original mirror supports need to be improved to provide better image quality. The newly designed mirror supports were installed before the 2^nd engineering run. The 2^nd engineering run result shows that the MCS overall position accuracy is better than 4μm and the image processing time is less than 4 seconds. The MCS is ready for the system integration with other PFS components.

Original language	English (US)
Title of host publication	Ground-Based and Airborne Instrumentation for Astronomy VIII
Editors	Christopher J. Evans, Julia J. Bryant, Kentaro Motohara
Publisher	SPIE
ISBN (Electronic)	9781510636811
DOIs	https://doi.org/10.1117/12.2561191
State	Published - 2020
Event	Ground-Based and Airborne Instrumentation for Astronomy VIII 2020 - Virtual, Online, United States Duration: Dec 14 2020 → Dec 22 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11447
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Ground-Based and Airborne Instrumentation for Astronomy VIII 2020
Country/Territory	United States
City	Virtual, Online
Period	12/14/20 → 12/22/20

All Science Journal Classification (ASJC) codes

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

Keywords

CMOS sensor
Metrology
Multi-fiber
Schmidt telescope
Spectrograph

Access to Document

10.1117/12.2561191

Cite this

Wang, S. Y., Chou, C. Y., Chang, Y. C., Huang, P. J., Karr, J., Yan, C. H., Gunn, J. E., Loomis, C., Lupton, R., Siddiqui, H., Hsu, S. F., Hu, Y. S., Reiley, D. J., Tamura, N., Moritani, Y., & Takato, N. (2020). Prime Focus Spectrograph (PFS): The metrology camera system. In C. J. Evans, J. J. Bryant, & K. Motohara (Eds.), Ground-Based and Airborne Instrumentation for Astronomy VIII Article 1144784 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11447). SPIE. https://doi.org/10.1117/12.2561191

@inproceedings{d0721e6e78c74ed592ddc1ab8cb4f7e1,

title = "Prime Focus Spectrograph (PFS): The metrology camera system",

abstract = "The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of the 8.2m Subaru telescope. PFS will cover a 1.3 degree diameter field with 2394 fibers to complement the imaging capabilities of Hyper SuprimeCam. To retain high throughput, the final positioning accuracy between the fibers and observing targets of PFS is required to be less than 10 µm. The metrology camera system (MCS) serves as the optical encoder of the fiber positioners for configuring of fibers. The MCS locates at the Cassegrain focus of the Subaru telescope to cover the whole focal plane with one 50M pixel CMOS sensor. The information from MCS will be fed into the fiber positioner control system for closed loop control. The MCS was delivered to Subaru Observatory in Apr. 2018 and it had two engineering runs in Oct. 2018 and Aug. 2019. The 1st engineering run concluded that the original mirror supports need to be improved to provide better image quality. The newly designed mirror supports were installed before the 2nd engineering run. The 2nd engineering run result shows that the MCS overall position accuracy is better than 4μm and the image processing time is less than 4 seconds. The MCS is ready for the system integration with other PFS components.",

keywords = "CMOS sensor, Metrology, Multi-fiber, Schmidt telescope, Spectrograph",

author = "Wang, {Shiang Yu} and Chou, {Chueh Yi} and Chang, {Yin Chang} and Huang, {Pin Jie} and Jennifer Karr and Yan, {Chi Hung} and Gunn, {James E.} and Craig Loomis and Robert Lupton and Hassan Siddiqui and Hsu, {Shu Fu} and Hu, {Yen Shan} and Reiley, {Daniel J.} and Naoyuki Tamura and Yuki Moritani and Naruhisa Takato",

note = "Publisher Copyright: {\textcopyright} 2020 SPIE; Ground-Based and Airborne Instrumentation for Astronomy VIII 2020 ; Conference date: 14-12-2020 Through 22-12-2020",

year = "2020",

doi = "10.1117/12.2561191",

language = "English (US)",

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

publisher = "SPIE",

editor = "Evans, {Christopher J.} and Bryant, {Julia J.} and Kentaro Motohara",

booktitle = "Ground-Based and Airborne Instrumentation for Astronomy VIII",

address = "United States",

}

Wang, SY, Chou, CY, Chang, YC, Huang, PJ, Karr, J, Yan, CH, Gunn, JE, Loomis, C, Lupton, R, Siddiqui, H, Hsu, SF, Hu, YS, Reiley, DJ, Tamura, N, Moritani, Y & Takato, N 2020, Prime Focus Spectrograph (PFS): The metrology camera system. in CJ Evans, JJ Bryant & K Motohara (eds), Ground-Based and Airborne Instrumentation for Astronomy VIII., 1144784, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11447, SPIE, Ground-Based and Airborne Instrumentation for Astronomy VIII 2020, Virtual, Online, United States, 12/14/20. https://doi.org/10.1117/12.2561191

Prime Focus Spectrograph (PFS): The metrology camera system. / Wang, Shiang Yu; Chou, Chueh Yi; Chang, Yin Chang et al.
Ground-Based and Airborne Instrumentation for Astronomy VIII. ed. / Christopher J. Evans; Julia J. Bryant; Kentaro Motohara. SPIE, 2020. 1144784 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11447).

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

TY - GEN

T1 - Prime Focus Spectrograph (PFS)

T2 - Ground-Based and Airborne Instrumentation for Astronomy VIII 2020

AU - Wang, Shiang Yu

AU - Chou, Chueh Yi

AU - Chang, Yin Chang

AU - Huang, Pin Jie

AU - Karr, Jennifer

AU - Yan, Chi Hung

AU - Gunn, James E.

AU - Loomis, Craig

AU - Lupton, Robert

AU - Siddiqui, Hassan

AU - Hsu, Shu Fu

AU - Hu, Yen Shan

AU - Reiley, Daniel J.

AU - Tamura, Naoyuki

AU - Moritani, Yuki

AU - Takato, Naruhisa

PY - 2020

Y1 - 2020

N2 - The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of the 8.2m Subaru telescope. PFS will cover a 1.3 degree diameter field with 2394 fibers to complement the imaging capabilities of Hyper SuprimeCam. To retain high throughput, the final positioning accuracy between the fibers and observing targets of PFS is required to be less than 10 µm. The metrology camera system (MCS) serves as the optical encoder of the fiber positioners for configuring of fibers. The MCS locates at the Cassegrain focus of the Subaru telescope to cover the whole focal plane with one 50M pixel CMOS sensor. The information from MCS will be fed into the fiber positioner control system for closed loop control. The MCS was delivered to Subaru Observatory in Apr. 2018 and it had two engineering runs in Oct. 2018 and Aug. 2019. The 1st engineering run concluded that the original mirror supports need to be improved to provide better image quality. The newly designed mirror supports were installed before the 2nd engineering run. The 2nd engineering run result shows that the MCS overall position accuracy is better than 4μm and the image processing time is less than 4 seconds. The MCS is ready for the system integration with other PFS components.

AB - The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of the 8.2m Subaru telescope. PFS will cover a 1.3 degree diameter field with 2394 fibers to complement the imaging capabilities of Hyper SuprimeCam. To retain high throughput, the final positioning accuracy between the fibers and observing targets of PFS is required to be less than 10 µm. The metrology camera system (MCS) serves as the optical encoder of the fiber positioners for configuring of fibers. The MCS locates at the Cassegrain focus of the Subaru telescope to cover the whole focal plane with one 50M pixel CMOS sensor. The information from MCS will be fed into the fiber positioner control system for closed loop control. The MCS was delivered to Subaru Observatory in Apr. 2018 and it had two engineering runs in Oct. 2018 and Aug. 2019. The 1st engineering run concluded that the original mirror supports need to be improved to provide better image quality. The newly designed mirror supports were installed before the 2nd engineering run. The 2nd engineering run result shows that the MCS overall position accuracy is better than 4μm and the image processing time is less than 4 seconds. The MCS is ready for the system integration with other PFS components.

KW - CMOS sensor

KW - Metrology

KW - Multi-fiber

KW - Schmidt telescope

KW - Spectrograph

UR - http://www.scopus.com/inward/record.url?scp=85107483045&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85107483045&partnerID=8YFLogxK

U2 - 10.1117/12.2561191

DO - 10.1117/12.2561191

M3 - Conference contribution

AN - SCOPUS:85107483045

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

BT - Ground-Based and Airborne Instrumentation for Astronomy VIII

A2 - Evans, Christopher J.

A2 - Bryant, Julia J.

A2 - Motohara, Kentaro

PB - SPIE

Y2 - 14 December 2020 through 22 December 2020

ER -

Prime Focus Spectrograph (PFS): The metrology camera system

Abstract

Publication series

Conference

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this