arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1408.3284astro-ph.IM
收藏

斯巴鲁Prime Focus Spectrograph近红外相机

The near infrared camera for the Subaru Prime Focus Spectrograph

Stephen A. Smee, James E. Gunn, Mirek Golebiowski, Robert Barkhouser, Sebastien Vives, Sandrine Pascal, Michael Carr, Stephen C. Hope, Craig Loomis, Murdock Har… 展开作者

Stephen A. Smee, James E. Gunn, Mirek Golebiowski, Robert Barkhouser, Sebastien Vives, Sandrine Pascal, Michael Carr, Stephen C. Hope, Craig Loomis, Murdock Hart, Hajime Sugai, Naoyuki Tamura, Atsushi Shimono

摘要:

我们提出了详细的设计,近红外相机的SuMIRe(斯巴鲁测量图像和红移)主焦点光谱仪(PFS)正在开发的斯巴鲁望远镜。PFS摄谱仪设计用于同时收集2394个物体的光谱,覆盖波长从380 nm到1.26 um。摄谱仪由四个相同的摄谱仪模块组成,每个模块从望远镜主焦点的机器人光纤定位器收集大约600个光谱。每个摄谱仪模块将有两个覆盖波长范围380 nm - 640 nm和640 nm - 955 nm的可见光通道,以及一个波长范围955 nm - 1.26 um的近红外(NIR)通道。每个通道中的分散光通过300 mm焦距f/1.07真空施密特照相机成像到4k x 4k 15 um像素检测器格式上。对于NIR通道,使用HgCdTe衬底去除的Teledyne 1.7 μ m截止器件。在可见光通道中,使用来自Hamamatsu的CCD。这些相机很大,在入口窗口处具有300 mm的净孔径,质量约为250 kg。像两个可见光通道相机一样,NIR相机只包含四个光学元件:一个双元件折射校正器,一个Mangin镜和一个场平坦透镜。考虑到宽视场和波长范围,这种简单的设计产生了非常好的成像性能,并且它在很大程度上是由于施密特初级使用了曼金镜(具有反射后表面的透镜)。在NIR相机的情况下,后反射表面是二向色的,其反射带内波长并且透射超过1.26 μ m的波长。这与第二校正器元件的后表面上的热抑制滤波器涂层相结合,大大减少了到达检测器的带外热辐射。

英文摘要:

We present the detailed design of the near infrared camera for the SuMIRe (Subaru Measurement of Images and Redshifts) Prime Focus Spectrograph (PFS) being developed for the Subaru Telescope. The PFS spectrograph is designed to collect spectra from 2394 objects simultaneously, covering wavelengths that extend from 380 nm - 1.26 um. The spectrograph is comprised of four identical spectrograph modules, with each module collecting roughly 600 spectra from a robotic fiber positioner at the telescope prime focus. Each spectrograph module will have two visible channels covering wavelength ranges 380 nm - 640 nm and 640 nm - 955 nm, and one near infrared (NIR) channel with a wavelength range 955 nm - 1.26 um. Dispersed light in each channel is imaged by a 300 mm focal length, f/1.07, vacuum Schmidt camera onto a 4k x 4k, 15 um pixel, detector format. For the NIR channel a HgCdTe substrate-removed Teledyne 1.7 um cutoff device is used. In the visible channels, CCDs from Hamamatsu are used. These cameras are large, having a clear aperture of 300 mm at the entrance window, and a mass of ~ 250 kg. Like the two visible channel cameras, the NIR camera contains just four optical elements: a two-element refractive corrector, a Mangin mirror, and a field flattening lens. This simple design produces very good imaging performance considering the wide field and wavelength range, and it does so in large part due to the use of a Mangin mirror (a lens with a reflecting rear surface) for the Schmidt primary. In the case of the NIR camera, the rear reflecting surface is a dichroic, which reflects in-band wavelengths and transmits wavelengths beyond 1.26 um. This, combined with a thermal rejection filter coating on the rear surface of the second corrector element, greatly reduces the out-of-band thermal radiation that reaches the detector.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑