CN217505565U

CN217505565U - Three-lens light path for laser particle analyzer

Info

Publication number: CN217505565U
Application number: CN202221602258.5U
Authority: CN
Inventors: 王成亮; 于代君
Original assignee: Shandong Nike Analytical Instrument Co ltd
Current assignee: Shandong Nike Analytical Instrument Co ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-09-27
Anticipated expiration: 2032-06-24

Abstract

The utility model provides a three camera lens light paths for laser particle analyzer. The structure is as follows: the input end of the filter lens is connected with a Fourier lens, the input end of the Fourier lens is connected with an optical fiber interface, a laser beam from the optical fiber interface sequentially passes through the Fourier lens, the filter lens, a measurement sample and the standard Fourier transform coated lens to reach a detector, and an auxiliary detector is arranged between the detector and the standard Fourier transform coated lens. The utility model discloses in, fiber interface inserts high-power fiber laser, and the Fourier camera lens becomes convergent light with the divergent light of laser, and the stray light of dispersion is mainly eliminated to the filter camera lens, makes convergent light on the light path purer, makes the instrument obtain lower background value, measures more accurate sensitive. A detection sample can generate a scattered light signal through laser beam irradiation, the scattered signal can be converged to a detector through a standard Fourier transform coating lens, and a detection signal is stronger and more sensitive.

Description

Three-lens light path for laser particle analyzer

Technical Field

The utility model relates to a laser particle analyzer technical field, concretely relates to three camera lens light paths for laser particle analyzer.

Background

The laser particle analyzer analyzes the particle size through the spatial distribution (scattering spectrum) of diffraction or scattering light of particles, and adopts the Furanhofer diffraction and Mie scattering theory, so that the testing process is not influenced by a plurality of factors such as temperature change, medium viscosity, sample density, surface state and the like.

Because the laser has good monochromaticity and strong directivity, a parallel laser beam can irradiate an infinite space without obstruction and has little divergence in the process of propagation. When the light beam encounters a particle blockage, a scattering phenomenon occurs in a portion of the light. The direction of propagation of the scattered light will form an angle with the direction of propagation of the main beam. The size of the included angle is related to the size of the particles, and the larger the particles are, the smaller the included angle of the generated scattered light is; the smaller the particle, the larger the angle of the scattered light produced. Based on this principle, the particle size distribution of the sample can be obtained exactly by measuring the intensity of the scattered light at different angles. In the construction of a laser particle analyzer, the optical path structure is a core component thereof, and has a direct influence on the accuracy and sensitivity of detection. In the prior art, the conventional optical path structure still needs to be improved, and especially when a detection sample is irradiated by a laser beam, a scattered light signal is generated, and the detection result is directly influenced.

Disclosure of Invention

The utility model discloses aim at to prior art's technical defect, provide a three camera lens light paths for laser particle analyzer to the technical problem that detection accuracy, sensitivity that solve conventional light path structure remain to be promoted.

The utility model discloses another technical problem that solve is, produced scattered light signal influences the testing result when testing the sample and passing through the laser beam irradiation.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

the utility model provides a three camera lens light paths for laser particle sizer, including filter lens, the Fourier camera lens, fiber interface, the laser beam, the measurement sample, standard Fourier transform coated lens, the detector, supplementary detector, wherein, be connected with the Fourier camera lens at filter lens's input, be connected with fiber interface at Fourier lens's input, the laser beam that comes from fiber interface passes Fourier camera lens, filter lens, the measurement sample, standard Fourier transform coated lens in proper order reachs the detector, be provided with supplementary detector between detector and standard Fourier transform coated lens.

Preferably, the auxiliary detector is located beside the laser beam.

Preferably, there are several auxiliary detectors.

Preferably, the ends of the laser beam converge on the detector.

The utility model provides a three camera lens light paths for laser particle analyzer. In the technical scheme, the optical fiber interface is connected with the high-power optical fiber laser, the Fourier lens changes the divergent light of the laser into convergent light, and the filter lens mainly eliminates scattered stray light, so that the convergent light on a light path is purer, an instrument obtains a lower background value, and the measurement is more accurate and sensitive. The detection sample can generate a scattered light signal through laser beam irradiation, the scattered signal can be converged on a detector by the standard Fourier transform coating lens, and the detection signal can be stronger and more sensitive.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

in the figure:

1. filter lens 2, Fourier lens 3, optical fiber interface 4, laser beam

5. A measurement sample 6, a standard Fourier transform coated lens 7, a detector 8 and an auxiliary detector.

Detailed Description

The following will describe in detail specific embodiments of the present invention. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Example 1

The utility model provides a three camera lens light paths for laser particle analyzer, as shown in fig. 1, including filter lens 1, Fourier lens 2, fiber interface 3, laser beam 4, measurement sample 5, standard Fourier transform coated lens 6, detector 7, auxiliary detector 8, wherein, be connected with Fourier lens 2 at filter lens 1's input, be connected with fiber interface 3 at Fourier lens 2's input, laser beam 4 who comes from fiber interface 3 passes Fourier lens 2 in proper order, filter lens 1, measurement sample 5, standard Fourier transform coated lens 6 and reaches detector 7, be provided with auxiliary detector 8 between detector 7 and standard Fourier transform coated lens 6.

Example 2

The utility model provides a three camera lens light paths for laser particle analyzer, as shown in fig. 1, including filter lens 1, Fourier lens 2, fiber interface 3, laser beam 4, measurement sample 5, standard Fourier transform coated lens 6, detector 7, auxiliary detector 8, wherein, be connected with Fourier lens 2 at filter lens 1's input, be connected with fiber interface 3 at Fourier lens 2's input, laser beam 4 who comes from fiber interface 3 passes Fourier lens 2 in proper order, filter lens 1, measurement sample 5, standard Fourier transform coated lens 6 and reaches detector 7, be provided with auxiliary detector 8 between detector 7 and standard Fourier transform coated lens 6. Wherein the auxiliary detector 8 is located beside the laser beam 4. There are several auxiliary detectors 8. The end of the laser beam 4 is focused on a detector 7.

The above detailed description of the embodiments of the present invention is only for the preferred embodiments of the present invention, and the present invention is not limited thereto. Any modification, equivalent replacement, and improvement made within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a three camera lens light paths for laser particle analyzer, its characterized in that includes filter lens (1), Fourier lens (2), fiber interface (3), laser beam (4), measurement sample (5), standard Fourier transform coated lens (6), detector (7), auxiliary detector (8), wherein, be connected with Fourier lens (2) at filter lens's (1) input, be connected with fiber interface (3) at Fourier lens's (2) input, laser beam (4) that come from fiber interface (3) pass Fourier lens (2) in proper order, filter lens (1), measurement sample (5), standard Fourier transform coated lens (6) reach detector (7), be provided with auxiliary detector (8) between detector (7) and standard Fourier transform coated lens (6).

2. A three-lens optical path for a laser particle sizer according to claim 1, wherein the auxiliary detector (8) is located beside the laser beam (4).

3. A three-lens optical path for a laser particle sizer according to claim 1, wherein there are several auxiliary detectors (8).

4. A three-lens optical path for a laser particle sizer according to claim 1, wherein the end of the laser beam (4) is focused on the detector (7).