Laser splitting and focusing module

Abstract

The utility model provides a laser splitting focusing module, including laser source, reshaping prism group and focus lens that are arranged in proper order, the laser source emits the combined multi-wavelength laser beam, the laser beam enters the reshaping prism group, passes through the reshaping prism group and is divided into a plurality of beam splitting light with different wavelengths, and the beam splitting light passes through the focus lens. A plurality of split light beams with different wavelengths enter the focus lens, are focused by the focus lens and then enter the flow chamber to form focused light spots, and the light spots with different wavelengths are arranged at certain intervals in the direction of the flow chamber. The laser splitting and focusing module is better in light path stability and less affected by external temperature and humidity, the stability of the laser splitting and focusing module is ensured without depending on the placement angle of a single element, and the output light beam interval stability can be ensured for a long time; the laser splitting and focusing module is smaller in size and better in flexibility during design and installation, and miniaturization of the flow cytometer is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field related to biomedical monitoring, and more precisely to a laser light splitting and focusing module. Background Art

[0002] Semiconductor lasers are lasers that use semiconductor materials as working materials. They have the best photoelectric conversion efficiency among all types of lasers, and have excellent optical and electrical properties such as wide wavelength coverage, long service life, and high-speed modulation. They also have the characteristics of small size, light weight, and price deviation. Semiconductor lasers are widely used in many fields such as laser communications, optical storage, optical gyroscopes, laser printing, ranging, and radar. Semiconductor lasers are used as light sources in the field of biomedical monitoring, especially in the field of flow cytometry, and semiconductor lasers are often used in the laser excitation optical path.

[0003] In the laser excitation optical path of the flow cytometer, different semiconductor lasers emit laser beams of different wavelengths. After a series of beam shaping in their respective sub-optical paths, they are combined into one beam through the corresponding beam combining structure in the beam combining optical path, and finally pass through the spectroscopic focusing module and are incident on the flow chamber to form a focused light spot. Light spots of different wavelengths are distributed at a certain interval along the direction of the flow chamber.

[0004] Existing spectroscopic focusing modules mostly use dichroic mirrors. The dichroic mirrors can selectively interfere with different compensation light waves through the optical coating on their surface. This selectivity enables the dichroic mirrors to effectively separate different colors or wavelengths without causing a significant loss of light intensity. However, the volume of space occupied by the dichroic mirror cannot be adjusted, which makes it difficult to miniaturize the overall volume of the beam combining module. In addition, the distance between the distribution of light spots of a specific wavelength depends on the reflection angle of the dichroic mirror. However, at present, dichroic mirrors are generally fixed in two ways: fixed by a frame or fixed by gluing on a substrate. Both fixing methods will be affected by external humidity, stress, time, etc., causing the angle of the dichroic mirror to shift, which in turn causes the direction of the light beam to change, affecting the pointing stability and causing the beam spacing to be unstable.

[0005] It can be seen that the art needs to improve the existing laser spectroscopic focusing module to reduce the volume and improve the pointing stability. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a laser beam splitting and focusing module, which uses a shaping prism group to split the combined laser beam and focuses it through a focusing lens to reduce the overall volume and increase stability.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a laser splitting and focusing module, comprising a laser source, a shaping prism group and a focusing mirror arranged in sequence, the laser source emits a laser beam with multiple wavelengths, the laser beam is incident on the shaping prism group, and is beamed into a plurality of split beams with different wavelengths through the shaping prism group, the plurality of split beams with different wavelengths are incident on the focusing mirror, are focused by the focusing mirror, and then are incident on a flow chamber to form a focused light spot, and the light spots of different wavelengths are arranged at a certain interval along the direction of the flow chamber.

[0008] Preferably, the shaping prism group includes a first shaping prism and a second shaping prism of the same structure, and the first shaping prism and the second shaping prism are arranged at an angle interval and are respectively fixedly arranged.

[0009] Preferably, a collimator is included, and the collimator is arranged between the laser source box and the shaping prism group, and the laser beam enters the shaping prism group after passing through the collimator.

[0010] Preferably, the output end of the laser source has an optical fiber, the collimating component is a fiber collimator, and the collimating component is connected to the output end of the optical fiber.

[0011] Preferably, a cylindrical mirror is included, and the cylindrical mirror is arranged between the shaping prism group and the focusing mirror, and a plurality of split beams of light with different wavelengths are incident on the focusing mirror after passing through the cylindrical mirror.

[0012] Compared with the prior art, the advantages of a laser spectroscopic focusing module disclosed by the utility model are: the optical path stability of the laser spectroscopic focusing module is better, it is less affected by external temperature and humidity, it does not rely on the placement angle of a single component to ensure its stability, and it can ensure the stability of the output light beam interval for a long time. The flow cytometer using the laser spectroscopic focusing module can work accurately for a long time; the laser spectroscopic focusing module is smaller in size and more flexible in design and installation, which is conducive to the miniaturization of the flow cytometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] like Figure 1 Shown is a structural schematic diagram of a laser beam splitting and focusing module of the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1 As shown, the present application discloses a laser beam splitting and focusing module, which includes a laser source 1, a collimator 2, a shaping prism group 3, a cylindrical mirror 4, and a focusing mirror 5, which are arranged in sequence. The laser source 1 emits a laser beam with multiple wavelengths, and the laser beam enters the shaping prism group 3 after passing through the collimator 2. After passing through the shaping prism group 3, the beams are split into several beams with different wavelengths, and the several beams with different wavelengths enter the focusing mirror 5 after passing through the cylindrical mirror 4. The beams are shaped by the cylindrical mirror 4, and the beams are focused by the focusing mirror 5, and then enter the flow chamber to form a focused light spot, and the light spots of different wavelengths are arranged at a certain interval along the flow chamber direction. Compared with the dichroic mirror, the shaping prism group 3 is smaller in size, so the laser beam splitting and focusing module is also smaller in size; the shaping prism group 3 is less affected by the external temperature and humidity, and does not rely on the placement angle of a single component to ensure its stability, and can ensure the stability of the output beam interval for a long time.

[0017] Specifically, the output end of the laser source 1 has an optical fiber 11 , and the collimating component 2 is a fiber collimator, and the collimating component 2 is connected to the output end of the optical fiber 11 .

[0018] Preferably, the shaping prism group 3 includes a first shaping prism 31 and a second shaping prism 32 of the same structure, the first shaping prism 31 and the second shaping prism 32 are arranged at an angle interval and are fixedly arranged. The prism itself has a light splitting function, and the two prisms can shape the light beam while splitting the light.

[0019] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser beam splitting and focusing module, characterized in that: The invention comprises a laser source, a shaping prism group and a focusing mirror arranged in sequence. The laser source emits a laser beam of multiple wavelengths, the laser beam enters the shaping prism group, and is beamed into a plurality of split beams with different wavelengths through the shaping prism group. The plurality of split beams with different wavelengths enter the focusing mirror, are focused by the focusing mirror, and then enter the flow chamber to form a focused light spot, and the light spots with different wavelengths are arranged at a certain interval along the direction of the flow chamber.

2. The laser beam splitting and focusing module according to claim 1, characterized in that: The shaping prism group comprises a first shaping prism and a second shaping prism of the same structure. The first shaping prism and the second shaping prism are arranged at an angle and spaced apart from each other and are respectively fixedly arranged.

3. The laser beam splitting and focusing module according to claim 1, characterized in that: It comprises a collimating component, which is arranged between the laser source box and the shaping prism group. The laser beam enters the shaping prism group after passing through the collimating component.

4. The laser beam splitting and focusing module according to claim 3, characterized in that: The output end of the laser source has an optical fiber, and the collimating component is a fiber collimator, and the collimating component is connected to the output end of the optical fiber.

5. The laser beam splitting and focusing module according to claim 1, characterized in that: It comprises a cylindrical mirror, which is arranged between the shaping prism group and the focusing mirror. A plurality of split beams with different wavelengths are incident on the focusing mirror after passing through the cylindrical mirror.

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