Upgrade plans for the Subaru AO system

Yutaka Hayano; Hideki Takami; Wolfgang Gaessler; Naruhisa Takato; Miwa Goto; Yukiko Kamata; Yosuke Minowa; Naoto Kobayashi; Masanori Iye

doi:10.1117/12.459679

7 February 2003 Upgrade plans for the Subaru AO system

Yutaka Hayano, Hideki Takami, Wolfgang Gaessler, Naruhisa Takato, Miwa Goto, Yukiko Kamata, Yosuke Minowa, Naoto Kobayashi, Masanori Iye

Author Affiliations +

Proceedings Volume 4839, Adaptive Optical System Technologies II; (2003) https://doi.org/10.1117/12.459679
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

A 36-elements curvature adaptive optics (AO) system has been operating on the Subaru telescope for about one and a half year. We achieved a Strehl ratio of 0.3 in the K-band, which is a rather smaller value than we expected. While we are investigating the discrepancy between the obtained performance and the simulated performance of the current AO system and we are also improving the current AO system in terms of the Strehl performance and the observing efficiency. Meanwhile we have started to plan a next generation of Subaru AO system. Two major upgrades are proposed in this paper. One is to increase the number of subapertures as much as possible. Practically, the number of subapertures lies between 100 and 200. The size of subaperture becomes half to one-third of that of the current system and we expected that the K-band Strehl ratio will improve to more than 0.6. The first light of the higher order curvature AO system is scheduled for 2004. Another upgrade plan is to use a laser guide star (LGS). A single LGS is projected at the sodium layer with an output power of 4 W. Conceptual designs for the laser system, beam relay system, laser launching telescope and control system have begun. The first test of launching laser from Subaru telescope will be in 2005.

Citation Download Citation

Yutaka Hayano, Hideki Takami, Wolfgang Gaessler, Naruhisa Takato, Miwa Goto, Yukiko Kamata, Yosuke Minowa, Naoto Kobayashi, and Masanori Iye "Upgrade plans for the Subaru AO system", Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); https://doi.org/10.1117/12.459679

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available