SHADOWS: a spectro-gonio radiometer for bidirectional reflectance studies of dark meteorites and terrestrial analogs: design, calibrations, and performances on challenging surfaces

Potin Sandra; Brissaud Olivier; Beck Pierre; Schmitt Bernard; Magnard Yves; Correia Jean-Jacques; Rabou Patrick; Jocou Laurent

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SHADOWS: a spectro-gonio radiometer for bidirectional reflectance studies of dark meteorites and terrestrial analogs: design, calibrations, and performances on challenging surfaces

机译：阴影：用于暗陨石和地面模拟的双向反射率研究的光谱 - Gonio辐射计：在具有挑战性的表面上的设计，校准和表演

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We have developed a new spectro-gonio radiometer, SHADOWS, to study in the laboratory the bidirectional reflectance distribution function of dark and precious samples. The instrument operates over a wide spectral range from the visible to the near-infrared (350-5000 nm) and is installed in a cold room to operate at a temperature as low as -20 degrees C. The high flux monochromatic beam is focused on the sample, resulting in an illumination spot of about 5.2 mm in diameter. The reflected light is measured by two detectors with high sensitivity (down to 0.005% in reflectance) and absolute accuracy of 1%. The illumination and observations angles, including azimuth, can be varied over wide ranges. This paper presents the scientific and technical constraints of the spectro-gonio radiometer, its design and additional capabilities, as well as the performances and limitations of the instrument. (C) 2018 Optical Society of America

机译：我们开发了一种新的Spectro-Gonio辐射计，阴影，在实验室中学研究黑暗和珍贵样品的双向反射率分布功能。该仪器在近红外（350-5000nm）的可见范围内操作，并安装在冷室中以在低至-20℃的温度下操作。高通量单色光束集中在一起样品，导致直径约为5.2mm的照明点。反射光由两个探测器测量，具有高灵敏度（反射率下降至0.005％），绝对精度为1％。在宽范围内可以改变包括方位角的照明和观察角度。本文介绍了Spectro-Gonio辐射计的科学和技术限制，其设计和额外的能力，以及仪器的性能和限制。（c）2018年光学学会

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《Applied optics》 |2018年第28期|共18页
作者
Potin Sandra; Brissaud Olivier; Beck Pierre; Schmitt Bernard; Magnard Yves; Correia Jean-Jacques; Rabou Patrick; Jocou Laurent;
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Univ Grenoble Alpes Inst Planetol &

Astrophys Grenoble CNRS F-38000 Grenoble France;

Univ Grenoble Alpes Inst Planetol &

Astrophys Grenoble CNRS F-38000 Grenoble France;

Univ Grenoble Alpes Inst Planetol &

Astrophys Grenoble CNRS F-38000 Grenoble France;

Univ Grenoble Alpes Inst Planetol &

Astrophys Grenoble CNRS F-38000 Grenoble France;

Univ Grenoble Alpes Inst Planetol &

Astrophys Grenoble CNRS F-38000 Grenoble France;

Univ Grenoble Alpes Inst Planetol &

Astrophys Grenoble CNRS F-38000 Grenoble France;

Univ Grenoble Alpes Inst Planetol &

Astrophys Grenoble CNRS F-38000 Grenoble France;

Univ Grenoble Alpes Inst Planetol &

Astrophys Grenoble CNRS F-38000 Grenoble France;

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SHADOWS: a spectro-gonio radiometer for bidirectional reflectance studies of dark meteorites and terrestrial analogs: design, calibrations, and performances on challenging surfaces

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