Device and method for detecting dynamic light scattering multi-angle adjustable fiber-optic probe

Abstract

The invention discloses a device and a method for detecting dynamic light scattering multi-angle adjustable fiber-optic probe and belongs to the field of the dynamic light scattering nanoparticle detection devices. Two lens angle adjustment mechanisms capable of adjusting the inclination angles of lenses are fixedly arranged on an outer cylinder (1); the inner sides of the two lens angle adjustment mechanisms are fixedly connected with a transmitting lens (9) and a receiving lens (7) by penetrating through the outer cylinder (1), respectively; the two lenses are driven to tilt by a drift angle with a horizontal axis by virtue of the movement of the inner sides of the two lens angle adjustment mechanisms, respectively, and therefore, the inclination angles of the two lenses can be adjusted, respectively. According to the device and the method for detecting dynamic light scattering multi-angle adjustable fiber-optic probe, the lens angle adjustment mechanisms are arranged on one sides of two groups of lenses, respectively, and the mounting angles of the two groups of lenses can be independently adjusted by use of two groups of unassociated lens angle adjustment mechanisms, respectively, and therefore, the angle adjustment range between the two groups of lenses is expanded and the purpose of flexibly adjusting the detection angle of the fiber-optic probe in multiple angles is achieved.

Description

technical field [0001] The invention provides a dynamic light scattering multi-angle adjustable optical fiber probe detection device and method, belonging to the field of dynamic light scattering nano particle detection devices. Background technique [0002] The particle size and distribution of submicron and nanoparticle are the main parameters to characterize their performance, and the measurement of these parameters is of great significance. Among them, dynamic light scattering technology is an effective method for measuring the particle size of submicron and nanoparticle. In the dynamic light scattering particle measurement technology, photon correlation spectroscopy is widely used, and the specific operation is to use a photodetector to receive scattered light at a fixed spatial position for detection. However, due to the extremely weak scattered light used in this method, the photodetector can only receive discrete photon pulses, and at the same time output correspondi...

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Problems solved by technology

[0003] However, the traditional dynamic light scattering optical path is complicated, and because the scattered light is transmitted in the air, it is easily disturbed by dust, external light and vibration, the signal-to-noise ratio of the system is low, and the quality of the correlation function output by the photon correlator is degraded. Reliable measurement results that limit the range of use of traditional dynamic light scattering devices

Moreover, the optical path of the existing dynamic light scattering device, the position of the lens of the probe and the optical fiber are fixed, and correspondingly, only the scattered light at a fixed angle can be detected, and it cannot be adjusted freely according to the needs. A lot of inconvenience, can no longer meet the experimental needs of dynamic light scattering particle measurement

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