Spectrometer arrangement
The present disclosure resides in a spectrometer arrangement including a first dispersing element for spectral separation of radiation in a main dispersion direction, and a second dispersing element for spectral separation of radiation in a cross-dispersion direction, which is at an angle to the main dispersion direction, so that a two-dimensional spectrum is producible. The spectrometer arrangement also includes a collimating optics, which directs collimated radiation to the first and/or second dispersing element, a camera optics, which images a two-dimensional spectrum in an image plane, a two-dimensional detector for detecting the two-dimensional spectrum in the image plane, and an off-axis section of a rotationally symmetric, refractive element, which is arranged between the camera optics and the detector. The present disclosure resides likewise in an optical module comprising such a spectrometer arrangement.
1. A spectrometer arrangement, including:
a first dispersing element for spectral separation of radiation in a main dispersion direction;
a second dispersing element for spectral separation of radiation in a cross-dispersion direction, which is at an angle to the main dispersion direction, so that a two-dimensional spectrum is producible;
a collimating optics, which directs collimated radiation to the first and/or second dispersing element;
a camera optics, which images a two-dimensional spectrum in an image plane;
a two-dimensional detector for detecting the two-dimensional spectrum in the image plane; and
an off-axis section of a rotationally symmetric, refractive element, which is arranged between the camera optics and the two-dimensional detector.
2. The spectrometer arrangement of claim 1 , wherein the refractive element is embodied as a biconvex lens.
3. The spectrometer arrangement of claim 1 , wherein the refractive element is embodied as a spherical lens.
4. The spectrometer arrangement of claim 1 , wherein at least one lens area is embodied aspherically.
5. The spectrometer arrangement of claim 1 , wherein the refractive element includes an anti-reflective coating.
6. The spectrometer arrangement of claim 1 , wherein the refractive element is manufactured from a low dispersing material.
7. The spectrometer arrangement of claim 1 , wherein the collimating optics and/or the camera optics includes a concave mirror.
8. The spectrometer arrangement of claim 1 , wherein the first dispersing element is embodied as an echelle grating.
9. The spectrometer arrangement of claim 1 , wherein the first dispersing element is replaced with a mirror arranged perpendicularly to the image plane of the two-dimensional detector, and wherein the two-dimensional detector is replaced by a one-dimensional detector.
10. The spectrometer arrangement of claim 1 , wherein the second dispersing element is embodied as a prism.
11. The spectrometer arrangement of claim 10 , wherein the prism is reflectively coated on a rear side.
12. The spectrometer arrangement of claim 10 , wherein the prism is rotatably seated.
13. The spectrometer arrangement of claim 1 , wherein the spectrometer arrangement forms a Littrow spectrometer.
14. An optical module for retrofitting a spectrometer arrangement, including:
wherein the spectrometer arrangement includes a first dispersing element for spectral separation of radiation in a main dispersion direction, a second dispersing element for spectral separation of radiation in a cross-dispersion direction, which is at an angle to the main dispersion direction, so that a two-dimensional spectrum is producible, a collimating optics, which directs collimated radiation to the first and/or second dispersing element, a camera optics, which images a two-dimensional spectrum in an image plane, and a two-dimensional detector for detecting the two-dimensional spectrum in the image plane;
at least a rotationally symmetric, refractive element, an off-axis section of which is configured for positioning between the camera optics and the two-dimensional detector.