title: Optics design of the divertor infrared television of KSTAR.
abstract: The divertor Infrared television (IR TV) system for monitoring the temperature of a divertor and localized hot spots will be installed on the upper port of the N-port in the Korea Superconducting Tokamak Advanced Research (KSTAR). The cassette of KSTAR makes a periscope inevitable for the divertor IR TV. In this article, 4 design concepts for the periscope were examined, and the design based on Keplerian was shown to have better stabilities in alignment and the vibration. The final optics design based on an f-theta lens, Keplerian, and telecentric lens was derived.
authors.affiliation: National Fusion Research Institute, 113 Gwahangno, Daejeon 305-333, South Korea.
authors.forename: S
authors.initials: S
authors.lastname: Oh
authors.affiliation: CVI Optics Co., Ltd, Samjeong-dong, Bucheon-si 421-809, South Korea.
authors.forename: K
authors.initials: K
authors.lastname: Lee
authors.affiliation: National Fusion Research Institute, 113 Gwahangno, Daejeon 305-333, South Korea.
authors.forename: H H
authors.initials: HH
authors.lastname: Lee
authors.affiliation: National Fusion Research Institute, 113 Gwahangno, Daejeon 305-333, South Korea.
authors.forename: H M
authors.initials: HM
authors.lastname: Wi
authors.affiliation: National Fusion Research Institute, 113 Gwahangno, Daejeon 305-333, South Korea.
authors.forename: Y S
authors.initials: YS
authors.lastname: Kim
authors.affiliation: Department of Plasma Physics and Nuclear Fusion, Korea University of Science and Technology, Daejeon 305-350, South Korea.
authors.forename: C S
authors.initials: CS
authors.lastname: Kang