Spectrometer

A spectrometer comprising:

• a base;
• a light input element disposed on the base for receiving an optical signal;
• a reflector disposed on the base for incidence of the optical signal received by the light input element and reflecting the incident optical signal;
• a planar optical grating disposed on the base for incidence of the optical signal reflected by the reflector, and configured to split the optical signal into a plurality of spectral components;
• a focusing mirror disposed on the base for focusing the plurality of spectral components split by the planar optical grating;
• an image sensor disposed on the base, and comprising a sensing surface for receiving the plurality of spectral components focused by the focusing mirror, wherein the sensing surface extends along the base, and comprises a virtual central line extending along an arrangement direction of the plurality of spectral components and two end portions;
• a shading element disposed between the focusing mirror and the image sensor according to an optical influence factor, wherein the shading element is an opaque piece, and is located on a projection path of a portion of the plurality of spectral components to shade the portion of the plurality of spectral components for suppressing a part of the plurality of spectral components having excessively high light intensity, a shadow generated by the shading element on the sensing surface does not fall on the virtual central line and the two end portions;
• and
• a mounting part disposed on the base, and the shading element being disposed on the mounting part so that the shading element is disposed on the base via the mounting part, wherein the mounting part comprises an adjusting structure configured to adjust a setting angle or a setting position of the shading element relative to the base.