22 July 2014 Wide field corrector for the KMTNet telescope
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Abstract
We present the design, assembly, alignment, and verification process of the wide field corrector for the Korea Microlensing Telescope Network (KMTNet) 1.6 meter optical telescope. The optical configuration of the KMTNet telescope is prime focus, having a wide field corrector and the CCD camera on the topside of Optical Tube Assembly (OTA). The corrector is made of four lenses designed to have all spherical surfaces, being the largest one of 552 mm physical diameter. Combining with a purely parabolic primary mirror, this optical design makes easier to fabricate, to align, and to test the wide field optics. The centering process of the optics in the lens cell was performed on a precision rotary table using an indicator. After the centering, we mounted three large and heavy lenses on each cell by injecting the continuous Room Temperature Vulcanizing (RTV) silicon rubber bonding via a syringe.
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Yongseok Lee, Yongseok Lee, Sang-Mok Cha, Sang-Mok Cha, Wade Poteet, Wade Poteet, Philip Lam, Philip Lam, Chung-Uk Lee, Chung-Uk Lee, Seung-Lee Kim, Seung-Lee Kim, Byeong-Gon Park, Byeong-Gon Park, Richard A. Buchroeder, Richard A. Buchroeder, Ho Jin, Ho Jin, } "Wide field corrector for the KMTNet telescope", Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 914538 (22 July 2014); doi: 10.1117/12.2055055; https://doi.org/10.1117/12.2055055
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