Integrated optical fiber probe for measuring dynamic light scattering particles and detection method

Abstract

The invention discloses an integrated optical fiber probe for measuring dynamic light scattering particles and a detection method and belongs to the technical field of measuring devices for dynamic light scattering nano particles. The integrated optical fiber probe is characterized by comprising transmitting optical fibers and receiving optical fibers, wherein one end of an outer casing (5) of the optical fiber probe is a closed end and the other end of the outer casing (5) is an open end; a fixed disk (7) is tightly mounted at the open end; self-focusing lenses are fixedly mounted through built-in through holes of the fixed disk (7) and comprise a transmitting lens and a receiving lens; inner end parts of the transmitting lens and the receiving lens are respectively and correspondingly connected with the transmitting optical fibers and the receiving optical fibers. According to the integrated optical fiber probe and the detection method, the optical path of the traditional light scattering device is changed; the optical fibers are introduced into a dynamic light scattering technology; a transmitting optical path and a receiving optical path are integrated together trough the optical fibers, so that a high-concentration sample can be measured and online detection of industrial production can be realized.

Description

technical field [0001] The invention relates to an integrated optical fiber probe for dynamic light scattering particle measurement and a detection method, belonging to the technical field of dynamic light scattering nano particle detection devices. Background technique [0002] The particle size and distribution of submicron and nano-particles are the main parameters to characterize their performance, so the measurement of these parameters is of great significance. Dynamic Light Scattering is an effective method for particle size measurement of submicron and nanoparticles. [0003] In the dynamic light scattering particle measurement technology, photon correlation spectroscopy is widely used, which uses a photomultiplier tube to receive scattered light at a fixed spatial position. Due to the extremely weak scattered light, the photomultiplier tube can only receive discrete photon pulses, and at the same time output corresponding electrical pulses at the output end, and sen...

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Problems solved by technology

[0004] However, the optical path of the traditional dynamic light scattering device is usually composed of a series of optical devices placed outside the sample cell, such as lenses and pinholes, resulting in a large volume of the entire measurement device; and because the scattered light is transmitted in the air, it is easily affected by dust, The interference of external light and vibration causes the signal-to-noise ratio of the system to be low, and the quality of the correlation function output by the photon correlator is degraded, so that reliable measurement results cannot be obtained. As a result, the traditional dynamic light scattering device is only suitable for laboratories and cannot For industrial online measurement

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