Optical system of particle analyzer

Abstract

A disclosed optical system of a particle analyzer comprises a front light assembly, a flow chamber and a diffusion light collection assembly; the diffusion light collection assembly comprises a low-angle diaphragm, a low-angle photoelectric induction apparatus, a medium-angle diaphragm, a medium-angle photoelectric induction apparatus, a large-angle diaphragm and a large-angle photoelectric induction apparatus. On the detection basis of a conventional particle analyzer on low / medium-angle scope data particles, a diffusion light collection apparatus for detection of large-angle scope data particles is increased, so that detection on low / medium / large-angle scope data particles is realized, and three-dimensional data of a measured particle is obtained, and by collecting the diffusion light at a large-angle scope, more particle information can be obtained, and the particle classification accuracy is improved.

Description

technical field [0001] The present application relates to particle analyzers for particle identification using light scattering methods, and more particularly to optical systems for particle analyzers. Background technique [0002] Whether in the clinical field or the scientific research field, the automatic detection of the classification of tiny particles such as cells has great application value. For example, a blood cell analyzer as a particle analyzer can output red blood cells, white blood cells and The number and volume of platelets and other information. [0003] According to the different principles of particle detection and counting, particle classification methods can generally be divided into impedance method and light scattering method. [0004] The impedance method is based on Coulter's principle. Taking a blood cell analyzer as an example, the instrument analyzes and counts blood cells by measuring the impedance change on the electrodes at both ends of the sm...

AI Technical Summary

Problems solved by technology

However, the scattered light collection lens of the currently commonly used optical system is limited by the numerical aperture (NA), and the upper limit of the scattering angle of the collected scattered light is difficult to be greater than 20°. Divided into two, it is also difficult to expand to three or more channels of scattering angle collection

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