Portable spectrometer

Abstract

The invention relates to a portable spectrograph, and belongs to the field of spectrographs. The portable spectrometer comprises a main body, the main body comprises a second main body and a third main body connected with the second main body, a second cavity is formed in the second main body, a third cavity is formed in the third main body, the second cavity is communicated with the third cavity, and the projection area of the second cavity on a first reference surface is gradually increased in the first direction; the system further comprises a spectrum sensor and a lens group. The second main body is further provided with a light source containing hole, the light source containing hole is communicated with the second cavity, and a light source is further fixedly arranged in the light source containing hole. After the light source emits irradiation light, the second main body can prevent primary and even multiple reflection light beams from entering the third cavity, the reflection characteristic of the inner wall of the second main body is relatively good, and the primary reflection light beam can still penetrate through the diaphragm to illuminate a sample in the sample cell after passing through the secondary reflection light beam of the inner wall of the second main body; the light beam which does not illuminate the sample is restrained in the second cavity and does not enter the third cavity to become interference light and stray light.

Description

technical field [0001] The invention relates to a portable spectrometer and belongs to the field of spectrometers. Background technique [0002] The MEMS-FPI spectral detector is a stable and reliable portable near-infrared spectrometer based on the MEMS spectral sensor. The MEMS spectral sensor has significant advantages such as high integration, compact structure, and convenient spectral scanning, which is very suitable for the design of portable instruments. The MEMS-FPI spectral detector also faces its own challenges. It has high requirements on the incident angle and beam aperture angle of the incident beam, and most of the near-infrared spectral analysis applications are the diffuse reflection spectrum of the sample. Therefore, the portable near-infrared spectrometer The optical path design of the company faces severe challenges, namely: the directivity of the cost-effective tungsten halogen lamp covering the near-infrared band is very poor, and a large amount of light...

AI Technical Summary

Problems solved by technology

The MEMS-FPI spectral detector also faces its own challenges. It has high requirements on the incident angle and beam aperture angle of the incident beam, and most of the near-infrared spectral analysis applications are the diffuse reflection spectrum of the sample. Therefore, the portable near-infrared spectrometer The optical path design of the company faces severe challenges, namely: the directivity of the cost-effective tungsten halogen lamp covering the near-infrared band is very poor, and a large amount of light that is not absorbed by the sample may directly enter the sensor through reflection, while the diffusely reflected signal light absorbed by the sample Instead lower

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