Abstract
Compact cross-grating spectrometers are inspired by classical high-end Echelle spectrometers and allow to acquire a large spectrum with a high spectral resolution in a single shot. To decrease the size of an Echelle spectrometer substantially, a cross grating was employed combining both required dispersive functionalities. First, an Echelle grating diffracts light in several higher diffraction orders, while a superposed, perpendicularly oriented cross-disperser is used in first diffraction order. In this contribution, we report on the realization of a cross-grating spectrometer employing a folded reflective beam path. A toric-convex mirror was introduced allowing aberration compensation. We present the basic concept and optical design of the system and discuss the mechanical implementation and the adjustment process. Here, different laser sources and gas emission lamps are used to realize the system and derive the optical performance. In particular, the spectral resolution in the different diffraction orders is determined for the realized device.
Highlights
The market for spectroscopy is known as a growing market based on an increasing number of applications, for example in industrial process control, agriculture or environmental monitoring
We report on the realization of a compact cross-grating spectrometer which covers a spectral range from 330 nm to 1100 nm with a resolving power λ ∆λ higher than 500
This contribution presents the realization of a compact cross-grating spectrometer with an all-reflective, folded beam path
Summary
The market for spectroscopy is known as a growing market based on an increasing number of applications, for example in industrial process control, agriculture or environmental monitoring. These new applications are connected to increasing demands on the spectroscopic instruments itself. The use of the combined cross-grating allows a substantial size reduction compared to classical Echelle spectrometers but requires new optical design approaches. In this contribution, we report on the realization of a compact cross-grating spectrometer which covers a spectral range from 330 nm to 1100 nm with a resolving power λ ∆λ higher than 500. Optical key parameters like the spectral resolution are determined by measurements
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