TEMPERATURE-COMPENSATED SPECTROMETER

摘要

The invention relates to a spectrometer (10), comprising a hollow main optical body (12) having at least one light channel (14), a light source (18), a diffraction grating (20) having a center grating point, a light inlet opening (24), and a detector unit (22), which are arranged in such a way that the focal curve of the spectrometer fills the back focus equation. In order to create a spectrometer having sufficient spectral resolution from a low-price, light, and easy-to-process material, said spectrometer being able to operate in a large temperature interval even without temperature stabilization, the light inlet opening (24) is arranged on a compensation body (28), the compensation body (28) is arranged in the light channel (14) and fastened to the main optical body (12) between the light source (18) and the diffraction grating (20), and the compensation body (28) is dimensioned in such a way that the compensation body changes the distance between the light inlet opening (24) and the center grating point when the main optical body (12) thermally expands.