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Single-beam double-lens laser particle analyzer

A laser particle size analyzer and dual-lens technology, used in particle size analysis, scientific instruments, particle and sedimentation analysis, etc., can solve problems such as high cost and small range, and achieve low cost, high accuracy of scattered signal resolution, and simple optical path structure. Effect

Inactive Publication Date: 2009-02-18
丹东百特科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to propose a laser particle sizer with simple structure, wide range, low cost and high precision for the defects of the existing single-beam laser particle sizer with small range and high cost of multi-beam laser particle sizer

Method used

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  • Single-beam double-lens laser particle analyzer
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Embodiment Construction

[0013] The structure and optical path principle of the present invention are described in detail in conjunction with the accompanying drawings:

[0014] A single-beam double-lens laser particle size analyzer, which is configured with a control system and a circulation dispersion system according to a conventional method, and the structure of the device in the housing 7 is as follows: figure 1 As shown: there is a backward receiving lens 2 behind the sample cell 3, which has two functions: one is to collimate the divergent laser light again, and the other is to receive the backward scattered light and convert the backward The scattered light is focused on the rearward detector. A forward receiving lens 4 is arranged in front of the sample cell 3, and the forward receiving lens 4 receives the forward scattered light, that is, gathers the forward scattered light onto the forward detector. The laser assembly 1 is horizontally installed behind the rearward receiving lens 2, and th...

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Abstract

The invention discloses a single-beam dual-lens laser particle size analyzer, which adopts an emanative laser beam as the light source and arranges two lenses before and after a sample pool; wherein, the lens after the sample pool simultaneously has two functions, one is to change the emanative laser beam into parallel light (secondary collimation), and the other is to receive the backward large-angle scattered light (aggregation). The lens before the sample pool is used to receive the forward scattered light. Photodetectors are respectively arranged on the focal planes of the two lenses to receive the forward and backward scattered signals, so that the forward and backward scattered light can be simultaneously received; the forward scattered light and the backward scattered light are respectively treated, and a small-angle scattered light and large-angle scattered light combined treatment technology is introduced, so that the test range of the laser particle size analyzer can reach 0.01-2000 micron. Through the effect of the unique design of the single-beam optical path reaching the multi-beam optical path, the invention is characterized by large test range, simple structure, small size, low cost and high measurement accuracy.

Description

technical field [0001] The invention relates to an instrument for measuring powder particle size, in particular to a laser particle size measuring instrument. Background technique [0002] Laser particle size analyzer has become the most popular powder particle size measurement instrument. Among the existing laser particle size analyzers, single-beam laser particle size analyzers are the most common. Its basic composition is along the direction of the optical path, usually including: a laser component, including a laser tube in the laser component, to emit laser light; a small converging lens, to converge the beam emitted by the laser tube; a spatial filter (Pinhole), used to filter the (spatial) high frequency component of the laser beam; collimating lens, used to make the beam into parallel light. A sample pool, the sample pool is usually connected to the circulation system to form a loop, the sample pool is sealed around the two ends and connected to the pipeline, the t...

Claims

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Application Information

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IPC IPC(8): G01N15/02
Inventor 董青云范继来
Owner 丹东百特科技有限公司
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