Sample measuring cell

Abstract

The invention discloses a sample measuring cell. The sample measuring cell comprises a reflection cavity and at least a reflection structure, wherein the reflection cavity is used for containing samples to be measured; the reflection structures are arranged on the boundary of the reflection cavity and comprise at least a contact surface and two reflecting surfaces; the contact surfaces are used for coming into contact with the samples; the reflecting surfaces are far away from the samples; and the reflecting surfaces are fully reflecting surfaces or are not fully reflecting surfaces. The sample measuring cell has the beneficial effects that the sample contact surfaces have chemical inertness toward the samples, and meanwhile, the reflecting surfaces are far away from the samples to be measured, so that the impurities in the samples to be measured and in samples cannot damage the reflecting surfaces playing a reflecting role; therefore the sample measuring cell has the advantages of strong adaptive capacity to environment and long optical path.

Description

technical field [0001] The invention relates to a sample measuring pool, in particular to a sample measuring pool for measuring the physical and chemical properties of a sample by using an optical method. Background technique [0002] At present, in many fields of application, it is necessary to use absorption spectroscopy to detect trace samples at ppm and ppb concentrations. In order to improve the detection sensitivity of absorption spectroscopy for low-concentration samples, increasing the optical path of the light beam passing through the sample is an effective method. method. Obviously, simply keeping the light source away from the detector and making the light beam pass through a very straight and long transmission type sample measurement cell will make the device bulky, complicated in alignment, poor in temperature stability and shock resistance. "Folding" of the optical path is often used, ie the beam is reflected multiple times between mirrors to achieve effective...

AI Technical Summary

Problems solved by technology

Whether it is a metal reflective film or a dielectric reflective film, due to the limited adhesion between the film layers, the adhesion between the film layer and the substrate material, and the compactness of the film layer, when the high reflective film layer is placed at a high temperature , high humidity, high dust, corrosive and other harsh environments, the gas, water vapor and impurities in the environment are easy to enter between the layers of the high reflective film layer and the connection between the high reflective film layer and the glass substrate, making the high The reflective film layer is easily damaged; in addition, in the preparation process of the high reflective film layer, foreign particles are generally introduced, and the introduced particle foreign matter will cause defects in the high reflective film layer. When it is in the environment, the damage will be aggravated, which not only reduces the reflectivity of the high-reflection film layer and loses light energy, but also the film layer that falls off during the destruction process may block the light path, further reducing the collection efficiency of light energy, and even make the glass Deformation and rupture under the stress of the high-reflection film layer, resulting in poor environmental adaptability of the sample measurement cell based on the coating technology mirror, unable to adapt to different measurement environments, and cannot be used normally in harsh environments

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