论文标题
凯克天文台尺度仪器的IR成像渠道的设计
Design of an IR Imaging Channel for the Keck Observatory SCALES Instrument
论文作者
论文摘要
正在计划为W. M. Keck天文台的下一代仪器，该仪器称为Slicer，并结合了用于外球形光谱法（鳞片）的镜头阵列（尺度）。鳞片将具有一个积分场光谱仪（IFS）和一个衍射受限的成像通道，以发现和频谱表征直接成像的系外行星。在热红外波长（1-5微米和0.6-5微米的目标）下运行，尺度的成像通道的设计旨在覆盖12“ x 12”视场，其较低扭曲和高吞吐量。除了扩大中红外科学案例并为NIRC2提供潜在的升级/替代方案外，成像渠道的H2RG检测器还可以拍摄学生的高分辨率图像以帮助对齐过程。图像摄像机还可以帮助ifs手臂进行小型田野采集。在这项工作中，我们介绍了成像仪的光学力学设计，并评估其功能和性能。
A next-generation instrument named, Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES), is being planned for the W. M. Keck Observatory. SCALES will have an integral field spectrograph (IFS) and a diffraction-limited imaging channel to discover and spectrally characterize the directly imaged exoplanets. Operating at thermal infrared wavelengths (1-5 micron, and a goal of 0.6-5 micron), the imaging channel of the SCALES is designed to cover a 12"x 12" field of view with low distortions and high throughput. Apart from expanding the mid-infrared science cases and providing a potential upgrade/alternative for the NIRC2, the H2RG detector of the imaging channel can take high-resolution images of the pupil to aid the alignment process.Further, the imaging camera would also assist in small field acquisition for the IFS arm. In this work, we present the optomechanical design of the imager and evaluate its capabilities and performances.
