[P-CG20] Future missions and instrumentation for space and planetary science

[PCG20-02] Developing the Near-Infrared Spectral Camera Series for Lunar Landing Mission

★Invited Papers

*Yusuke Nakauchi¹, Kazuto Saiki¹, Makiko Ohtake^2,3, Hiroshi Nagaoka¹, Yoshiaki Ishihara³, SLIM MBC team, LUPEX ALIS team (1.Ritsumeikan University, 2.University of Aizu, 3.Japan Aerospace Exploration Agency)

Keywords:SLIM MBC, LUPEX ALIS, Lunar Exploration

Opportunities for lunar surface exploration have been increasing. In Japan, there is also advancing multiple missions, including SLIM, LUPEX, and manned lunar surface exploration. We are developing a series of near-infrared spectral cameras for these missions. The reflectance spectra in the near-infrared wavelength region are useful for identifying lunar surface composition of mineral and volatile. There is 3 types of near-infrared spectral camera for lunar surface exploration.

Multi-Band Camera: Obtain 2-dimensional spatial information and discrete wavelength information
Hyper Spectrometer: Obtain 1-dimensional spatial information and continuous spectra with high resolution
Hyper Spectral Imager: Obtain 2-dimensional spatial information and continuous spectra

Now, we are developing 3 type near-infrared spectral cameras, allowing the selection of an appropriate them based on scientific objectives and payload requirements. MBC onboard SLIM is a compact multi-band camera composed of an imaging sensor (Vis-InGaAs: Xenics Ltd. Co.), filter-wheel with 10 band-pass filters, a telephoto focusable optical system, and a movable mirror for panning and tilting [1]. ALIS onboard LUPEX is a hyper spectrometer composed of an imaging sensor (Vis-InGaAs: Sony), grating, and a movable mirror for panning and tilting [2]. The compact VIS-NIR microscopic hyper imager, which is developing now, is hyper spectral imager composed of a SWIR camera (VIS-InGaAs: Sony), auto focus macro lens, and near-infrared light source [3]. In this presentation, we will outline the differences and common technologies among these spectral cameras.

Reference: [1] Y. Nakauchi et al., (2025), 56^th LPSC, abstract #1924, [2] Y. Ishihara et al., (2024), 55^th LPSC, abstract #1761, [3] Y. Nakauchi et al., (2025), 56^th LPSC, abstract #2279