Miniature ultraviolet-visible/infrared nondestructive test spectrometer

Abstract

The invention discloses a miniature ultraviolet-visible / infrared nondestructive test spectrometer. The nondestructive test spectrometer comprises a light source, a photoelectric sensor, a circuit system, a housing and a power source. The light source comprises a base pin, a base, an aluminum substrate, a minisize single-chip microcomputer circuit, a LED array, an optical conductor and a light guide cylinder; the photoelectric sensor is an ultraviolet / infrared silicon photodiode; the circuit system comprises a single-chip microcomputer control circuit, a power amplifier circuit, a signal amplification and filter circuit, and a data transmission circuit; the housing is the cylinder with a light source slot, a power source socket, a communication socket, and a separating layer; and the power source is the DC source. The miniature ultraviolet-visible / infrared nondestructive test spectrometer can be used for determining the ultraviolet-visible / infrared transmission reflection absorption spectrum of one or more specific target substances, and has the advantages of small whole machine volume, light weight, and low cost, is suitable for on-site detection and is convenient for popularization, spectrum resolution is ideal, and the anti-interference performance and the stability of the system are good.

Description

technical field [0001] The invention belongs to the field of optical instruments, and specifically relates to a miniature ultraviolet-visible / infrared non-destructive testing spectrometer and its application, in particular to a light source, a photoelectric sensor, a circuit system, a casing and a power supply, which are used for non-destructive testing of one or more specific spectrometers. Device for UV-Vis / IR spectroscopy of target substances. Background technique [0002] Spectral detection is an emerging detection technology for qualitative or quantitative analysis by measuring the intensity of transmitted or reflected light of target substances in the ultraviolet-visible and infrared regions. The spectrometer developed based on this technology can be used in food and environmental detection, chemical composition quantification, electromagnetic radiation analysis and other fields. The traditional spectrometer is composed of many optical, electrical and mechanical syste...

AI Technical Summary

Problems solved by technology

[0006] First, the spectral resolution is not ideal

In the optical path, the divergent light emitted by the polychromatic light source is difficult to focus and image in a short distance after being diffracted by the plane transmission grating, so the spectral overlap is serious and the spectral resolution is not ideal

[0007] Second, the optical path is complex and the anti-interference is poor

Some optical components in the light splitting path, such as reflective micromirrors, are particularly sensitive to ambient temperature, causing the accuracy and stability of the spectrometer system to change with the ambient temperature. Using a complex temperature control system to control the temperature of these components will increase the system temperature. complexity, cost

At the same time, the complex optical path system has high requirements on the position of optical components. Once the optical components are misaligned due to physical factors such as vibration, large measurement errors will occur.

Especially for mobile phone spectrometers, if the optical path structure and the mobile phone body itself are fixed as a whole, it is difficult to reduce the cost of the whole machine; if the optical structure is made into a detachable module, it is inevitable that the Measurement error caused by bias

[0008] Third, the cost is relatively high

Due to the relatively high cost of complex optical paths and CCD systems, the cost of current miniature spectrometers is still difficult to reach the level accepted by ordinary consumers

Taking food testing as an example, the increasing attention of the society to food safety and the increasing requirements of consumers on food quality have made household detection spectrometers have great market prospects, but at present, there are tens of thousands of micro-spectrometers, and thousands of them at least. The cost limits its application in the field of household food safety testing

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