Optical design of a multi-resolution, single shot spectrograph

TL;DR

This paper introduces a novel multi-resolution, single-shot spectrograph design utilizing an optical pupil slicer, enabling simultaneous observations at different spectral resolutions with potential advantages for multi-object and integral field spectroscopy.

Contribution

The paper presents a new spectrograph concept based on an optical pupil slicer, expanding capabilities for multi-resolution, single-shot spectral observations.

Findings

Design inspired by existing instruments demonstrates feasibility.

Discussion of technical challenges and potential benefits.

Potential for enhanced multi-object spectroscopic observations.

Abstract

Multi-object or integral field spectrographs are recognized techniques for achieving simultaneous spectroscopic observations of different or extended sky objects with a high multiplex factor. In this communication is described a complementary approach for realizing similar measurements under different spectral resolutions at the same time. We describe the basic principle of this new type of spectrometer, that is based on the utilization of an optical pupil slicer. An optical design inspired from an already studied instrument is then presented and commented for the sake of illustration. Technical issues about the pupil slicer and diffractive components are also discussed. We finally conclude on the potential advantages and drawbacks of the proposed system.