The Origins Survey Spectrometer (OSS) is a multi-purpose far-IR spectrograph for Origins. Operating at the photon background limit, OSS covers the 25- to 588-μm wavelength range instantaneously at a resolving power (R) of 300 using six logarithmically spaced grating modules. Each module couples at least 30 and up to 100 spatial beams simultaneously, enabling true [three-dimensional (3D)] spectral mapping. In addition, OSS provides two high-resolution modes. The first inserts a long-path Fourier-transform spectrometer (FTS) into a portion of the incoming light in advance of the grating backends, enabling R up to 43 , 000 × [ λ / 112 μm ] , while preserving the grating-based sensitivity for line detection. The second incorporates a scanning etalon in series with the FTS to provide R up to 300,000 for the 100-to 200-μm range.

中文翻译：

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起源调查光谱仪：利用远红外光谱仪揭示遥远星系的心脏并形成行星系统

起源调查光谱仪（OSS）是用于起源的多功能远红外光谱仪。OSS使用六个对数间距的光栅模块，以300的分辨能力（R），可在光子本底极限下工作，瞬间覆盖25至588μm的波长范围。每个模块可同时耦合至少30个空间光束和多达100个空间光束，从而实现真正的[三维（3D）]光谱映射。另外，OSS提供两种高分辨率模式。第一种方法是在光栅后端之前，将长径傅立叶变换光谱仪（FTS）插入一部分入射光中，使R高达43，000×[λ/ 112μm]，同时保留基于光栅的灵敏度用于线路检测。第二种包括与FTS串联的扫描标准具，可在100至200μm范围内提供高达300,000的R。