Take you to understand the basic composition of the spectrometer

Spectrometer, also known as spectrometer, is widely known as direct reading spectromete.
A device that measures the intensity of spectral lines at different wavelengths with photodetectors such as photomultiplier tube.
It consists of an entrance slit, a dispersive system, an imaging system and one or more exit slit.
The electromagnetic radiation of the radiation source is separated into the desired wavelength or wavelength region by the dispersive element, and the intensity is measured at the selected wavelengt.
There are two types of monochromators and polychromator.
A typical spectrometer mainly consists of an optical table and a detection syste.
It includes the following main parts:Incident slit: The object point of the spectrometer imaging system is formed under the illumination of the incident ligh.
Collimating element: Make the light emitted by the slit into parallel ligh.
The collimating element can be a separate lens, mirror, or directly integrated on a dispersive element, such as a concave grating in a concave grating spectromete.
Dispersive element: Grating is usually used to disperse the optical signal into multiple beams according to wavelength in spac.
Focusing element: Focuses the dispersed beam to form a series of incident slit images on the focal plane, where each image point corresponds to a specific wavelengt.
Detector array: placed on the focal plane, used to measure the light intensity of each wavelength image poin.
The detector array may be a CCD array or other kind of photodetector arra.