The Korea Astronomy and Space Science Institute (KASI) is currently developing GrainCams as a candidate payload for NASA's Commercial Lunar Payload Services (CLPS). GrainCams consists of two instruments to be mounted on a rover: LevCam, which observes levitating dust near the lunar surface, and SurfCam, designed to observe lunar regolith. Over the past two years, LevCam and SurfCam have been engaged in optical and optomechanical design work, conducting various analyses to assess manufacturability. SurfCam, being a light field camera, has seen the development of a prototype to measure initial optical performance, along with conducting preliminary assembly and alignment. Despite some minor optical specification changes this year, the overall development is still ongoing. The paper will cover SurfCam's assembly and alignment strategies and performance measurement aspects.
The Korea Astronomy and Space Science Institute is working on a project, the Republic of Korea Imaging Test System shortly called ROKITS, which is an optical system that aims to study the formation and occurrence of the aurora. The main objective is to gain insights into the changes occurring in the atmosphere, particularly the upper atmosphere, due to external energy sources from outside the Earth. Additionally, the system will investigate the feasibility of detecting atmospheric waves, specifically atmospheric gravity waves, which spread from the lower atmosphere. To achieve these scientific goals, 90 degrees of a wide field of view and a very narrow bandwidth of filters in a specific wavelength are required, and this paper will present information on the optical design and related analysis.
The Korea Astronomy and Space Science Institute is developing GrainCam as a candidate payload for NASA's Commercial Lunar Payload Services (CLPS). GrainCam is a suite of two light field cameras: one of which is called SurfCam to observe the uppermost regolith on the lunar surface, and the other is LevCam to observe levitating dust over the lunar surface. This paper includes SurfCam's optical design and related analyses. The main goal of SurfCam is to get knowledge of the regolith on the lunar surface and obtain 3D images of the micro-structures through image processing with a micro-lens array (MLA). SurfCam consists of 1 cover glass and 12 spherical lenses. All lenses use space-qualified glass material to carry out a one-lunar-day mission on the moon and are designed to keep the required performance at the operating temperature of -20 ~ +60°𝐶. SurfCam based on the design works will conduct various tests to verify the overall performance through assembly and alignment.
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