Wide-field telescope design for the KMTNet project

Seung-Lee Kim; Byeong-Gon Park; Chung-Uk Lee; Larry Kappler; Nathan Kappler; Wade Poteet; Harold Cauthen; Dan Blanco; Richard Buchroeder; Jose Teran; Scott Freestone; Jong-Ung Lee; Myung Cho; In-Soo Yuk; Moo-Young Chun; Ho Jin; Sang-Mok Cha

doi:10.1117/12.894212

15 September 2011 Wide-field telescope design for the KMTNet project

Seung-Lee Kim, Byeong-Gon Park, Chung-Uk Lee, Larry Kappler, Nathan Kappler, Wade Poteet, Harold Cauthen, Dan Blanco, Richard Buchroeder, Jose Teran, Scott Freestone, Jong-Ung Lee, Myung Cho, In-Soo Yuk, Moo-Young Chun, Ho Jin, Sang-Mok Cha

Author Affiliations +

Proceedings Volume 8151, Techniques and Instrumentation for Detection of Exoplanets V; 81511B (2011) https://doi.org/10.1117/12.894212
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

The Korea Astronomy and Space Science Institute (KASI) are under development three 1.6m optical telescopes for the Korea Micro-lensing Telescope Network (KMTNet) project. These will be installed at three southern observatories in Chile, South Africa, and Australia by middle 2014 to monitor dense star fields like the Galactic bulge and Large Magellanic Cloud. The primary scientific goal of the project is to discover numerous extra-solar planets using the gravitational micro-lensing technique. We have completed the final design of the telescope. The most critical design issue was wide-field optics. The project science requires the Delivered Image Quality (DIQ) of less than 1.0 arcsec FWHM within 1.2 degree radius FOV, under atmospheric seeing of 0.75 arcsec. We chose the prime-focus configuration and realized the DIQ requirement by using a purely parabolic primary mirror and four corrector lenses with all spherical surfaces. We present design results of the wide-field optics, the primary mirror coating and support, and the focus system with three linear actuators on the head ring.

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Seung-Lee Kim, Byeong-Gon Park, Chung-Uk Lee, Larry Kappler, Nathan Kappler, Wade Poteet, Harold Cauthen, Dan Blanco, Richard Buchroeder, Jose Teran, Scott Freestone, Jong-Ung Lee, Myung Cho, In-Soo Yuk, Moo-Young Chun, Ho Jin, and Sang-Mok Cha "Wide-field telescope design for the KMTNet project", Proc. SPIE 8151, Techniques and Instrumentation for Detection of Exoplanets V, 81511B (15 September 2011); https://doi.org/10.1117/12.894212

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