Note: Optics design of a periscope for the KSTAR visible inspection system with mitigated neutron damages on the camera

The visible TV system used in the Korea Superconducting Tokamak Advanced Research device has been equipped with a periscope to minimize the damage on its CCD pixels from neutron radiation. The periscope with more than 2.3 m in overall length has been designed for the visible camera system with its s...

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Bibliographic Details
Published in:Review of scientific instruments 2018-06, Vol.89 (6), p.066102-066102
Main Authors: Lee, Kyuhang, Ko, Jinseok, Wi, Hanmin, Chung, Jinil, Seo, Hyeonjin, Jo, Jae Heung
Format: Article
Language:English
Subjects:
Cameras
Design
Field of view
Inspection
Modulation transfer function
Radiation damage
Scientific apparatus & instruments
Tokamak devices
Transfer functions
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Summary:The visible TV system used in the Korea Superconducting Tokamak Advanced Research device has been equipped with a periscope to minimize the damage on its CCD pixels from neutron radiation. The periscope with more than 2.3 m in overall length has been designed for the visible camera system with its semi-diagonal field of view as wide as 30° and its effective focal length as short as 5.57 mm. The design performance of the periscope includes the modulation transfer function greater than 0.25 at 68 cycles/mm with low distortion. The installed periscope system has confirmed the image qualities as designed and also as comparable as those from its predecessor but with far less probabilities of neutral damages on the camera.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5033567