Miniature optical path structure of spectrophotometer and application method thereof

Abstract

The invention belongs to the technical field of spectrophotometer, and specifically relates to a miniature optical path structure of spectrophotometer and an application method thereof; a cuvette tank component is arranged on a cuvette base; an optical filter component and an optical focus component are respectively arranged on two ends of the cuvette base; an optical path for detecting cuvette sample information on the cuvette tank component is formed above the optical filter component, the optical focus component, the cuvette tank component and the cuvette base; the method comprises the following steps: a sample is placed in the cuvette tank component; in a space of 100-800cm3, an optical signal, formed by a point light source sequentially passes through optical path purification and optical path collimation of the optical filter component, the sample in the cuvette tank component, and the optical path focus of the optical focus component, is sent to a detector or the inlet of the detector. Based on the law of conservation of energy, the miniature optical path structure of spectrophotometer optimizes the optical path structure, effectively reduces the loss of optical energy, increases the sensitivity of analysis as well as saves the manufacturing cost of the instrument.

Description

technical field [0001] The invention belongs to the technical field of spectrophotometers, in particular to a miniaturized optical path structure of a spectrophotometer and an application method thereof. Background technique [0002] A spectrophotometer is a detection instrument for qualitative and quantitative analysis of a substance by measuring the absorbance of the substance at a specific wavelength or within a certain wavelength range. It is widely used in food safety, environmental protection, pharmaceuticals, hygiene, Energy, chemical and other fields. The effective use of light energy in optical instruments is the guarantee for the excellent performance of the instruments. [0003] The design of the existing spectrophotometer is relatively complicated, taking the optical path structure of UV1900 as an example (see figure 1 ), in the figure: W1: tungsten halogen lamp; D2: tritium lamp; F: color filter; L1, L2: lens; M1, M3, M4, M6, M8, M9: spherical mirror; M5: flat...

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Problems solved by technology

[0003] The design of the existing spectrophotometer is relatively complicated, taking the optical path structure of UV1900 as an example (see figure 1 ), in the figure: W1: tungsten halogen lamp; D2: tritium lamp; F: color filter; L1, L2: lens; M1, M3, M4, M6, M8, M9: spherical mirror; M5: flat mirror; M7: Half mirror; M10, M11: protective mirror; G: grating; PD1, PD2: photocell; S1: entrance slit; S2: exit slit; C1, C2: cuvette holder

Depend on figure 1 It can be seen that the optical path structure of UV1900 requires a large number of mirrors, focusing mirrors, and plane mirrors, so the energy loss is also large, and because a certain optical path needs to be manufactured, the volume of the instrument is also large

This kind of spectrophotometer often needs special auxiliary equipment when adjusting the optical path, and has high technical requirements for assembly workers, resulting in low production efficiency

In addition, post-maintenance is also relatively cumbersome, and often problems occur in the optical path, and the instrument needs to be returned directly to the manufacturer for repair, resulting in the inability to complete related work on site and affecting the work efficiency of users

[0004] The cuvette rack is a key part of the spectrophotometer. For a long time, the cuvette racks of the 756 single-beam spectrophotometer and the UV1900 double-beam spectrophotometer on the market only serve as mobile switches and fixed cuvettes. It does not directly help the performance of the optical path system of the entire instrument

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