We present the design and testing of a prototype in-plane echelle spectrograph based on an actively controlled fiber-fed double-pass design. This system aims to be small and efficient with the minimum number of optical surfaces—currently a collimator/camera lens, cross-dispersing prism, grating and a reflector to send light to the detector. It is built from catalog optical components and has dimensions of approximately 20נ30 cm. It works in the optical regime with a resolution of >70,000. The spectrograph is fed by a bifurcated fiber with one fiber to a telescope and the other used to provide simultaneous Thorium Argon light illumination for wavelength calibration. The positions of the arc lines on the detector are processed in real time and commercial auto-guiding software is used to treat the positions of the arc lines as guide stars. The guiding software sends any required adjustments to mechanical piezo-electric actuators which move the mirror sending light to the camera removing any drift in the position of the arc lines. The current configuration using an sCMOS detector provides a precision of 3.5 milli-pixels equivalent to 4m s⁻¹ in a standard laboratory environment.

我们介绍了基于主动控制的纤维馈电双通道设计的原型平面内阶梯光栅光谱仪的设计和测试。该系统旨在以最少数量的光学表面实现小型高效——目前是准直器/相机镜头、交叉色散棱镜、光栅和用于将光发送到检测器的反射器。它由目录光学组件制成，尺寸约为 20 至 30 厘米。它在光学状态下工作，分辨率 > 70,000。光谱仪由分叉光纤馈送，其中一根光纤用于望远镜，另一根用于同时提供钍氩光照明以进行波长校准。探测器上的弧线位置是实时处理的，采用商用自动导引软件将弧线位置作为导星。引导软件将任何所需的调整发送到机械压电执行器，该执行器移动镜子，将光线发送到相机，消除弧线位置的任何漂移。使用 sCMOS 检测器的当前配置可提供 3.5 毫像素的精度，相当于 4ms^-1在标准实验室环境中。