U-shaped homogenization generating device for linear laser energy

Abstract

The utility model relates to the technical field of linear laser generating devices, in particular to a U-shaped homogenizing generating device for linear laser energy. Comprising a laser diode, a focus lens, a Powell prism and a plano-convex cylindrical lens, wherein the focus lens, the Powell prism and the plano-convex cylindrical lens are all arranged on an emergent light path of the laser diode; one end, far away from the laser diode, of the focusing lens is an aspheric surface, the focusing lens is used for focusing light beams emitted by the laser diode, and the Powell prism and the plano-convex cylindrical lens are used for dispersing the focused light beams into uniform U-shaped homogenized line laser. Through the arrangement, the Powell prism and the plano-convex cylindrical lens in the embodiment can generate U-shaped homogenized line laser with uniform optical density, good stability and good linearity, the structure is simple, and industrial mass production can be realized.

Description

Technical Field

[0001] The present disclosure relates to the technical field of line laser generating devices, and in particular to a line laser energy U-shaped homogenizing generating device. Background Art

[0002] Line laser is a point laser transformed through an optical lens. It can be used in button machines, rivet machines, bag opening machines, cutting machines, bar-tacking machines, cloth pulling machines, etc. It is quick, convenient, intuitive and practical to use, and can greatly improve work efficiency. The straight line laser has clear lines, is compact and easy to install, and can provide supporting products and technical support for various clothing equipment manufacturers. The installation machine of the laser marker is simple and convenient to use. It can be installed on the vertical or horizontal surface of the machine, providing a visible laser marking line, so that there is a visible, non-contact positioning line to guide the operation process throughout the production process. It has the advantages of facilitating production operations and improving production efficiency. The laser line can be fine-tuned in three-dimensional space to achieve the best use effect. At present, the online laser on the market is mainly obtained by two methods: cylindrical mirrors and Powell prisms.

[0003] Ordinary spherical cylindrical mirrors can transform laser beams into line lasers after passing through them. The production process is relatively simple and can be mass-produced. However, because the light spot of the laser diode light source is basically Gaussian distribution, the imaging effect of the line laser obtained by ordinary spherical cylindrical mirrors or single prisms is still approximately Gaussian distribution, presenting an uneven line effect with bright middle and dark ends. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a linear laser energy U-shaped homogenization generating device.

[0005] The present disclosure provides a U-shaped homogenization generating device for linear laser energy, characterized in that it comprises a laser diode, a focusing lens, a Powell prism and a plano-convex cylindrical lens, wherein the focusing lens, the Powell prism and the plano-convex cylindrical lens are all arranged on the output light path of the laser diode;

[0006] The end of the focusing mirror away from the laser diode is an aspherical surface. The focusing mirror is used to focus the light beam emitted by the laser diode. The Powell prism and the plano-convex cylindrical lens are used to disperse the focused light beam into a uniform U-shaped homogenized line laser.

[0007] Optionally, the cross-sectional shape of the Powell prism is a pentagon, and the plane side of the Powell prism is away from the focusing lens.

[0008] Optionally, the plano-convex cylindrical lens comprises a convex side and a planar side, and the convex side and the planar side are arranged on two opposite sides of the plano-convex cylindrical lens.

[0009] Optionally, the convex side of the plano-convex cylindrical lens faces the Powell prism.

[0010] Optionally, a detector is further included, and the detector is arranged at an end of the output light path away from the plano-convex cylindrical lens.

[0011] Optionally, the spacing between the Powell prism and the plano-convex cylindrical lens is proportional to the laser line width of the U-shaped homogenized laser line.

[0012] Optionally, the focusing lens is made of D-ZK3 optical glass.

[0013] Optionally, the Powell prism and the plano-convex cylindrical lens are both made of BK7 optical glass.

[0014] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0015] The present disclosure provides a U-shaped homogenization generating device for line laser energy, including a laser diode, a focusing mirror, a Powell prism and a plano-convex cylindrical lens, wherein the laser diode, the focusing mirror, the Powell prism and the plano-convex cylindrical lens are arranged in sequence, and the focusing mirror, the Powell prism and the plano-convex cylindrical lens are all arranged on the output light path of the laser diode. In addition, the side of the focusing mirror away from the laser diode is an aspheric surface, the focusing mirror is used to focus the light beam emitted by the laser diode, and the Powell prism and the plano-convex cylindrical lens are used to disperse the focused light beam into a uniform U-shaped homogenized line laser. Through the above arrangement, the Powell prism and the plano-convex cylindrical lens in this embodiment can generate a U-shaped homogenized line laser with uniform optical density, good stability and good linearity, and the structure is simple, and industrial mass production can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0017] In order to more clearly illustrate the embodiments of the present invention 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 It is a schematic structural diagram of the plano-convex cylindrical lens according to the embodiment of the present disclosure, in which the convex surface faces the Powell prism;

[0019] Figure 2 It is a schematic structural diagram of a plano-convex cylindrical lens with a plane facing Powell prism according to an embodiment of the present disclosure;

[0020] Figure 3 It is a structural schematic diagram of the Powell prism described in the embodiment of the present disclosure;

[0021] Figure 4 It is a schematic diagram of the structure of the plano-convex cylindrical lens according to an embodiment of the present disclosure;

[0022] Figure 5 It is a schematic diagram of the linear optical path of the plane of the plano-convex cylindrical lens toward the Powell prism according to the embodiment of the present disclosure;

[0023] Figure 6 It is a schematic diagram of the linear optical path of the convex surface of the plano-convex cylindrical lens facing the Powell prism according to the embodiment of the present disclosure;

[0024] Figure 7 This is a test diagram of the transverse distribution of the light beam according to the embodiment of the present disclosure;

[0025] Figure 8 This is a test diagram of the longitudinal distribution of the light beam described in the embodiment of the present disclosure.

[0026] Among them, 1. Laser diode; 2. Focusing lens; 3. Powell prism; 4. Plano-convex cylindrical lens; 5. Detector. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0029] The present disclosure provides a U-shaped line laser energy homogenization generating device, comprising a laser diode 1, a focusing lens, a Powell prism 3 and a plano-convex cylindrical lens 4, wherein the focusing lens, the Powell prism 3 and the plano-convex cylindrical lens 4 are all arranged on the outgoing light path of the laser diode 1;

[0030] The end of the focusing mirror away from the laser diode 1 is an aspherical surface, and the focusing mirror is used to focus the light beam emitted by the laser diode 1. The Powell prism 3 and the plano-convex cylindrical lens 4 are used to disperse the focused light beam into a uniform U-shaped homogenized line laser.

[0031] like Figure 1 and Figure 2As shown, the present disclosure provides a U-shaped homogenization generating device for line laser energy, comprising a laser diode 1, a focusing lens, a Powell prism 3 and a plano-convex cylindrical lens 4, wherein the laser diode 1, the focusing lens, the Powell prism 3 and the plano-convex cylindrical lens 4 are arranged in sequence, and the focusing lens, the Powell prism 3 and the plano-convex cylindrical lens 4 are all arranged on the exit light path of the laser diode 1. Moreover, the side of the focusing lens away from the laser diode 1 is an aspherical surface, the focusing lens is used to focus the light beam emitted by the laser diode 1, and the Powell prism 3 and the plano-convex cylindrical lens 4 are used to disperse the focused light beam into a uniform U-shaped homogenized line laser.

[0032] Through the above arrangement, the Powell prism 3 and the plano-convex cylindrical lens 4 in this embodiment can generate a U-shaped homogenized line laser with uniform light density, good stability and good linearity, and the structure is simple, and industrial mass production can be achieved.

[0033] In addition, if Figure 3 As shown, the cross-sectional shape of the Powell prism 3 is a pentagon, and the plane side of the Powell prism 3 is away from the focusing lens. In this embodiment, the Powell prism 3 is used to stretch the laser beam focused by the focusing lens into a straight line for uniform illumination.

[0034] As for the plano-convex cylindrical lens 4, Figure 4 As shown, the plano-convex cylindrical lens 4 includes a convex side and a flat side, and the convex side and the flat side are arranged on opposite sides of the plano-convex cylindrical lens 4. The plano-convex cylindrical lens 4 in this embodiment is used to change the direction of the laser beam. After the Powell prism 3 stretches the laser beam focused by the focusing lens into a straight line with uniform irradiation, the plano-convex cylindrical lens 4 can change the direction of the laser beam and homogenize the line laser with uneven energy distribution.

[0035] In this embodiment, if Figure 6 As shown, the convex side of the plano-convex cylindrical lens 4 faces the Powell prism 3. Of course, if Figure 5 As shown, the flat side of the plano-convex cylindrical lens 4 can also be oriented toward the Powell prism 3 , thereby adapting to different usage situations.

[0036] In addition, a detector 5 is included, which is arranged at one end of the outgoing light path away from the plano-convex cylindrical lens 4. In this embodiment, the detector 5 is also included, and the laser beam emitted by the laser diode 1 is focused by a focusing lens, and then irradiated on the detector 5 through the Powell prism 3 and the plano-convex cylindrical lens 4.

[0037] Moreover, the distance between the Powell prism 3 and the plano-convex cylindrical lens 4 is inversely proportional to the length of the U-shaped homogenized laser line. When the distance between the Powell prism 3 and the plano-convex cylindrical lens 4 is larger, the laser line length is shorter. When the distance between the Powell prism 3 and the plano-convex cylindrical lens 4 is smaller, the laser line length is longer.

[0038] Specifically speaking, the focusing mirror is made of D-ZK3 optical glass. D-ZK3 has good optical transparency, can transmit light, and has certain optical refraction and transmission properties.

[0039] Specifically, the Powell prism 3 and the plano-convex cylindrical lens 4 are both made of BK7 optical glass. BK7 has a high light transmittance and can provide good transmission performance in the visible light and infrared light bands. Secondly, BK7 has low scattered light and light absorption performance, which can effectively reduce the light energy loss of optical components and improve the transmission efficiency of the optical system.

[0040] See also Figure 7 , the detection result of detector 5 is analyzed, except for the two ends where the energy of the beam is particularly high, the energy distribution of the rest is basically uniform. Figure 8 , the beam energy distribution is concentrated, and there is only one peak, and the beam quality is excellent.

[0041] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. 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 disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A U-shaped line laser energy homogenization generating device, characterized in that: It comprises a laser diode (1), a focusing lens (2), a Powell prism (3) and a plano-convex cylindrical lens (4), wherein the focusing lens (2), the Powell prism (3) and the plano-convex cylindrical lens (4) are all arranged on the outgoing light path of the laser diode (1); The end of the focusing mirror (2) away from the laser diode (1) is a non-spherical surface, the focusing mirror (2) is used to focus the light beam emitted by the laser diode (1), and the Powell prism (3) and the plano-convex cylindrical lens (4) are used to disperse the focused light beam into a uniform U-shaped homogenized line laser.

2. The U-shaped linear laser energy homogenization generating device according to claim 1, characterized in that: The cross-sectional shape of the Powell prism (3) is a pentagon, and the plane side of the Powell prism (3) is away from the focusing lens (2).

3. The U-shaped line laser energy homogenization generating device according to claim 1, characterized in that: The plano-convex cylindrical lens (4) comprises a convex side and a plane side, wherein the convex side and the plane side are arranged on two opposite sides of the plano-convex cylindrical lens (4).

4. The U-shaped linear laser energy homogenization generating device according to claim 1, characterized in that: The convex side of the plano-convex cylindrical lens (4) faces the Powell prism (3).

5. The U-shaped linear laser energy homogenization generating device according to claim 1, characterized in that: It also comprises a detector (5), which is arranged at an end of the output light path away from the plano-convex cylindrical lens (4).

6. The U-shaped line laser energy homogenization generating device according to claim 1, characterized in that: The distance between the Powell prism (3) and the plano-convex cylindrical lens (4) is proportional to the line width of the U-shaped homogenized line laser.

7. The U-shaped linear laser energy homogenization generating device according to claim 1, characterized in that: The focusing lens (2) is made of D-ZK3 optical glass.

8. The U-shaped linear laser energy homogenization generating device according to claim 1, characterized in that: The Powell prism (3) and the plano-convex cylindrical lens (4) are both made of BK7 optical glass.

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