Spectrometer assembling and adjusting system

Abstract

The invention relates to the technical field of spectrometers, in particular to a spectrograph installation and adjustment system, which comprises a chip, and a preset light source, a first light mirror system, a Fabry-Perot interferometer and a second light mirror system which are arranged in sequence, and when the frequency of first parallel light meets the resonance condition of the Fabry-Perot interferometer, the Fabry-Perot interferometer is turned on; the spectrum of the transmitted second parallel light has a very high peak value, so that the first spectral data of the converged light has a very high peak value, the sensitivity to the subtle change emitted by the preset light source can be improved, and the assembling and adjusting system of the spectrograph has higher spectral resolution and can be used for assembling and adjusting the spectrograph. The first data result which is obtained according to the first spectral data and comprises the full width at half maximum corresponding to each preset spectral peak position is used as a standard, and according to a comparison result between the first data result and the second data result, a user can determine a component needing to be adjusted more conveniently.

Description

technical field [0001] The invention relates to the technical field of spectrometers, in particular to a spectrometer installation and adjustment system. Background technique [0002] Spectrometer: A spectrometer is also called a spectrometer, the most common one is a direct reading spectrometer, a device that uses a photodetector such as a photomultiplier tube to measure the intensity of a spectral line at different wavelengths. It consists of an incident slit, a dispersion system, an imaging system and an or Composed of multiple exit slits, the electromagnetic radiation of the radiation source is separated into the required wavelength or wavelength region by the dispersive element, and the intensity is measured at the selected wavelength (or scanning a certain waveband). Spectrometers are divided into monochromators and polychromators. [0003] Spectral resolution is an important index to measure the performance of a spectrometer. The higher the spectral resolution, the m...

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Problems solved by technology

[0008] However, in the actual assembly and adjustment process, the first concave reflector 2, the grating 3, the second concave reflector 4 and the optical sensor 5 cannot be completely in the ideal design position. Taking the position inclination of the optical sensor 5 as an example, as Figure 4 As shown, when the optical sensor 5 deviates from the designed position, the dotted image plane represents the ideal position, and the optical sensor 5 rotates around the point P2, then except that the monochromatic light converging to the point P2 can guarantee the resolution, other points such as P4 and The resolution of P5 will decrease, that is, the required full height at half maximum will increase, except for the following Figure 4 The deflection error shown, there is also defocus error, even deflection error and defocus exist at the same time

[0009] At present, in order to measure the spectral resolution of the full spectrum as objectively as possible, the conventional practice is to find a few more points in the entire spectral range to measure the full width at half maximum, such as image 3 As shown, measure the full width at half maximum of the wavelengths at P1, P2 and P3 positions at the same time, and use P1, P2 and P3 to represent the resolutions of the low-band, mid-band and long-band in the entire spectral range, and the most common is the Ar (Argon) light source spectrum, such as Figure 5 However, even if a few more points are found in the conventional method, it is impossible to measure the spectral resolution of the spectrometer in the whole spectrum, let alone guide the installation and adjustment of the spectrometer

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