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Hyper Suprime-Cam: System design and verification of image quality

机译：Hyper Suprime-Cam：系统设计和图像质量验证

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The Hyper Suprime-Cam (HSC) is an 870 megapixel prime focus optical imaging camera for the 8.2?m Subaru telescope. The wide-field corrector delivers sharp images of 0|${^{primeprime}_{.}}$|2 (FWHM) in the HSC-i?band over the entire 1|${^{circ}_{.}}$|5 diameter field of view. The collimation of the camera with respect to the optical axis of the primary mirror is done with hexapod actuators, the mechanical accuracy of which is a few microns. Analysis of the remaining wavefront error in off-focus stellar images reveals that the collimation of the optical components meets design specifications. While there is a flexure of mechanical components, it also is within the design specification. As a result, the camera achieves its seeing-limited imaging on Maunakea during most of the time; the median seeing over several years of observing is 0|${^{primeprime}_{.}}$|67 (FWHM) in the i band. The sensors use p-channel, fully depleted CCDs of 200?μm thickness (2048?×?4176 15?μm square pixels) and we employ 116 of them to pave the 50?cm diameter focal plane. The minimum interval between exposures is 34?s, including the time to read out arrays, to transfer data to the control computer, and to save them to the hard drive. HSC on Subaru uniquely features a combination of a large aperture, a wide field of view, sharp images and a high sensitivity especially at longer wavelengths, which makes the HSC one of the most powerful observing facilities in the world.
机译：Hyper Suprime-Cam（HSC）是用于8.2？m Subaru望远镜的870兆像素主焦点光学成像相机。宽视场校正器在整个1 | $ {^ { circ}范围内，在HSC-i？波段中提供清晰的图像0 | $ {^ { prime prime} _ {。}} $ | 2（FWHM）。 _ {。}} $ | 5直径视场。摄像机相对于主镜光轴的准直是通过六脚架致动器完成的，其机械精度为几微米。对离焦恒星图像中剩余波前误差的分析表明，光学组件的准直符合设计规范。虽然机械零件有挠性，但它也在设计规格之内。结果，在大部分时间里，相机都能在Maunakea上实现有限的视野成像。在i波段中，经过几年观察的中位数为0 | $ {^ { prime prime} _ {。}} $ | 67（FWHM）。传感器使用厚度为200？μm（2048？×？4176 15？μm正方形像素）的p沟道完全耗尽的CCD，我们采用116通道来铺开直径50？cm的焦平面。两次曝光之间的最小间隔为34秒，其中包括读取阵列，将数据传输到控制计算机并将其保存到硬盘驱动器的时间。斯巴鲁的HSC独特地具有大光圈，宽视野，清晰图像和高灵敏度（尤其是在较长波长下）的组合，这使HSC成为世界上最强大的观测设施之一。

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