Optical design of SPIDERS, a Subaru Pathfinder Instrument for Detecting Exoplanets and Retrieving Spectra
Optical design of SPIDERS, a Subaru Pathfinder Instrument for Detecting Exoplanets and Retrieving Spectra
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用于探测系外行星和检索光谱的斯巴鲁探路者仪器 SPIDERS 的光学设计
DOI：
10.1117/12.2629644
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
S. Thibault
中科院分区：
文献类型：
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作者：
O. Lardière;C. Marois;W. Thompson;Garima Singh;Adam B. Johnson;J. Fitzsimmons;T. Hardy;M. N’diaye;W. Heidrich;Qiang Fu;D. Brousseau;S. Thibault
NRC的新地球实验室在实验室中展示了与倾斜-高斯-涡旋焦平面掩模(FPM)相结合的自相干相机(SCC)的概念。这种斑点抑制技术，也就是。快速大气SCC技术(FAST)，可将对比度提高高达100倍。基于这一成功，NRC现在正在建造蜘蛛，这是斯巴鲁望远镜的访客仪器，将安装在AO188和新的斯巴鲁光束切换器后面的红外Nasmyth平台上。该光束既可以在蜘蛛和SCExao之间共享，用于同时观测，也可以完全发送到一台仪器上。蜘蛛也应该受益于即将到来的AO188可变形镜(DM)升级(64x64执行器)将A188转变为AO3k。蜘蛛的关键部件是用于第二阶段AO校正的ALPAO DM468，一个光瞳切迹面罩，一个倾斜-高斯FPM，一个Lyot光圈，一个分束器馈送(I)，一个在窄带内成像5“FoV的C-RED2相机和(Ii)一个成像傅里叶变换光谱仪和一个用于在3.3”FoV上光谱高达R~20,000的Sphira相机。蜘蛛的光学设计是全反射的，最高可达FPM，以避免色差并减少表面数量。两个离轴椭球面镜足以形成DM和变迹掩模所需的光瞳平面，f/聚焦在FP M上。仅使用从FPM到C-RED2相机的镜头来降低SCC对振动的敏感度。Lyot Stop将被阻挡的光反射到充当低阶波前传感器的相机，作为SCC焦平面波前传感器的补充。
NRC’s NEW-EARTH Lab has demonstrated in the laboratory a Self-Coherent Camera (SCC) concept combined with a Tilt-Gaussian-Vortex focal plane mask (FPM). This speckle suppression technique, a.k.a. Fast Atmospheric SCC Technique (FAST), can enhance the contrast up to 100 times. Based on this success, NRC is now building SPIDERS, a visitor instrument for Subaru telescope to be installed on the infrared Nasmyth platform behind AO188 and the new Subaru Beam Switcher. The beam can be either shared between SPIDERS and SCExAO for simultaneous observations or sent entirely to only one instrument. SPIDERS should also benefit from the upcoming AO188 deformable mirror (DM) upgrade (64x64 actuators) turning A188 to AO3k. The key-components of SPIDERS are an ALPAO DM468, used as a second-stage AO correction, a pupil apodizer mask, a Tilt-Gaussian FPM, a Lyot stop, a beam-splitter feeding (i), a C-RED2 camera imaging a 5” FoV in narrow bands and (ii), an imaging Fourier-Transform Spectrograph and a SAPHIRA camera for spectroscopy up to R~20,000 over a 3.3” FoV. SPIDERS optical design is fully reflective up to the FPM to avoid chromatic aberrations and reduce the number of surfaces. Two off-axis ellipsoid mirrors are enough to form the pupil planes required on the DM and the apodizer mask, and the f/64 focus on the FPM. Only lenses are used from the FPM up to the C-RED2 camera to mitigate the sensitivity of the SCC to vibrations. The Lyot stop reflects the blocked light to a camera acting as a Low-Order Wavefront Sensor complementing the SCC focal plane wavefront sensing.
使用高对比度成像测试台（HCIT）进行8段光子晶体掩模日冕仪的演示实验
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
村上尚史;西川淳;W.A.Traub;D.Mawet;D.C.Moody;B.D.Kern;J.T.Trauger;E.Serabyn;田村元秀;馬場直志;村上浩
通讯作者：
村上浩