Dynamic light scattering particle measurement multi-angle optical fiber probe and detection method

Abstract

The invention discloses a multi-angle optical fiber probe and a detection method for dynamic light scattering particle measurement, belonging to the field of dynamic light scattering nano particle detection devices. Including the outer casing (1), optical fiber, lens and angle adjustment mechanism, the emitting lens (7) and receiving lens (10) are installed side by side in the outer casing (1), and one end of the emitting lens (7) and receiving lens (10) is correspondingly connected to the emitting The optical fiber (2) and the receiving optical fiber (12), the two sides of the transmitting lens (7) and the receiving lens (10) are equipped with an angle adjustment mechanism, and the angle between the two lenses is adjusted by adjusting the inclination angle of the two lenses at the same time, and the angle adjustment mechanism The fixed end is rotatable and fixed on the outer side of the outer shell (1). The invention changes the optical path of the traditional dynamic light scattering, improves the signal-to-noise ratio, and the optical fiber probe can perform multi-angle detection, and can detect scattered light at the optimal scattering angle, which improves the accuracy of detection data and is suitable for industrial on-line measurement .

Description

technical field [0001] The invention discloses a multi-angle optical fiber probe and a detection method for dynamic light scattering particle measurement, belonging to the 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. In the dynamic light scattering particle measurement technology, photon correlation spectroscopy is widely used. This method uses a photodetector to receive scattered light at a fixed spatial position for detection. However, due to the extremely weak scattered light, the photodetector can only receive discrete photon pulses, and at the same time output corresponding electrical pulses at the output end, and send the...

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Problems solved by technology

[0003] However, the traditional dynamic light scattering optical path is complex, resulting in a large volume of the entire measurement device, and because the scattered light is transmitted in the air, it is easily disturbed by dust, external light and vibration, resulting in a low signal-to-noise ratio of the system, and the output of the photon correlator The quality of the correlation function decreases, so that reliable measurement results cannot be obtained, so that the traditional dynamic light scattering device is only suitable for laboratories, and cannot be used for industrial online measurement

Moreover, the optical path of the existing dynamic light scattering device, the position of the probe is fixed, and it can only detect the fixed angle, which cannot be adjusted according to the needs. need

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