AI 中文总结
Pollux作为欧洲对宜居世界天文台仪器贡献候选，是宽光谱覆盖的高分辨率光谱仪。展示了三个紫外通道光学设计进展，评估望远镜抖动影响，讨论FUV通道纯光谱学及补偿散焦方法，还估计探测器尺寸限制及NUV通道波长覆盖变化影响。
AI 中文摘要
Pollux是欧洲对宜居世界天文台仪器贡献的候选方案。它是具有偏振测量能力的高分辨率光谱仪，光谱覆盖从远紫外（FUV；100nm）到近红外（NIR；1.75μm）。通过将仪器分为五个通道实现宽光谱覆盖，每个通道含一个阶梯光谱仪。本文展示了三个紫外通道光学设计的最新进展，评估了望远镜残余抖动对分辨率和采样的影响，讨论了在FUV通道实现纯光谱学的选项及插入MUV和NUV偏振计时补偿散焦的方法，还估计了探测器尺寸限制的影响和NUV通道波长覆盖变化的潜在优势。
英文摘要
POLLUX is a candidate European instrumental contribution to the Habitable Worlds Observatory. It is a high-resolution spectrograph with polarimetric capabilities, covering from the far ultraviolet (FUV; 100nm) to the near infrared (NIR; 1.75mum). Such a broad spectral coverage is achieved by splitting the instrument into five channels, each comprising an echelle spectrograph: FUV, medium-UV (MUV), near-UV (NUV), optical (OPT), and NIR. A set of custom-made dichroics enables simultaneity across the MUV, NUV, OPT, and NIR channels.We present the latest developments in the optical design of the three UV channels. Specifically, we estimate the impact of telescope residual jitter on resolving power and sampling and discuss possible options to enable pure spectroscopy in the FUV channel without implementing a fully retractable polarimeter and to compensate the defocus when inserting MUV and NUV polarimeters. Finally, we estimate the impact of detector size limitation and potential advantages of shrinking or extending the wavelength coverage in the NUV channel.
Comments13 pages, 12 figures, SPIE Astronomical Telescopes + Instrumentation 2026
