Laser lens capable of adjusting divergence angle

Abstract

The utility model relates to the technical field of laser lenses, in particular to a laser lens with an adjustable divergence angle, which comprises a main lens barrel, a clamping groove used for accommodating a condensing light path lens and a linear light spot generator is arranged in the main lens barrel, the condensing light path lens and the linear light spot generator are arranged at intervals along the light path direction, a first sliding cavity is arranged on one side of the clamping groove, and a second sliding cavity is arranged on the other side of the clamping groove. An optical fiber connector is slidably connected in the first sliding cavity, an optical fiber light source is fixedly arranged in the middle of the optical fiber connector, a second sliding cavity is formed in the other side of the clamping groove, a cylindrical mirror fixing piece is slidably connected in the second sliding cavity, and a cylindrical mirror is fixedly arranged in the middle of the cylindrical mirror fixing piece. According to the utility model, the divergence angle of the line laser is controlled by adding and controlling the cylindrical mirror, and the distance between the cylindrical mirror and the linear light spot generator is adjusted, so that the divergence angle of the linear light spot lens can be adjusted within a certain range. And the requirement for adjusting the divergence angle of the linear light spot in a special use environment is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser lens technical field especially is involved in a kind of laser lens of adjustable divergence angle. BACKGROUND

[0002] With the continuous progress of science and technology, optical detection technology has been rapidly developed, because of its high precision, high sensitivity, high stability and the characteristics of remote detection in mechanical manufacturing industry, medical aerospace, rail transportation and various fields have become an indispensable part. As a part of optical detection, through its high-precision focusing and scanning, the precision and resolution of optical detection are significantly improved, and its performance in microscopic detection is particularly outstanding, which can detect cracks and gaps that cannot be observed by naked eye, significantly improve the quality of products, and can also find and prevent hidden dangers in time. The current line spot lens is usually a fixed divergence angle, if the angle needs to be changed, the parts need to be replaced, which cannot be done in some use scenarios. SUMMARY

[0003] The utility model aims at providing a kind of laser lens of adjustable divergence angle, which can solve the above technical problems.

[0004] The utility model provides a kind of laser lens of adjustable divergence angle, including main lens barrel, the main lens barrel is equipped with the clamping groove for accommodating condensing light path lens and line spot generator, the condensing light path lens and line spot generator are spaced apart along the light path direction, one side of the clamping groove is equipped with first sliding cavity, the first sliding cavity is slidably connected with optical fiber connector, the optical fiber connector middle part is fixed with optical fiber light source, the other side of the clamping groove is equipped with second sliding cavity, the second sliding cavity is slidably connected with cylindrical mirror fixing piece, the cylindrical mirror fixing piece middle part is fixed with cylindrical mirror.

[0005] Further, the side wall of the first sliding cavity is uniformly distributed with a plurality of top screw holes in the horizontal direction, and the top screw holes are threadedly connected with locking top screws.

[0006] Further, the edge of the first sliding cavity is fixedly provided with a first limiting block.

[0007] Further, the surface close to the outside of the cylindrical mirror fixing piece is fixedly connected with a pull rod.

[0008] Further, the side wall of the second sliding cavity is uniformly distributed with a plurality of top screw holes in the horizontal direction, and the top screw holes are threadedly connected with locking top screws.

[0009] Further, the edge of the second sliding cavity is fixedly provided with a second limiting block.

[0010] Further, the end of the pull rod is provided with an anti-skid cap.

[0011] Further, the cylindrical lens has an aspherical structure.

[0012] Further, the cylindrical lens has an aspherical structure.

[0013] Further, the cylindrical lens has an aspherical structure.

[0014]

[0015] C = 1 / R

[0016] Where the curvature radius R and the conic coefficient K are related to the surface shape of the line light spot generator, the R value and the K value can be derived and calculated through the surface shape of the line light spot generator. When the curvature radius and the conic coefficient are not optimized enough to meet the adjustment angle while maintaining a relatively stable state of energy distribution, high-order term optimization or free aspherical surface is needed.

[0017] z represents the coordinate of a point on the surface of the cylindrical lens in the z-axis direction, which is a function of y, i.e. the value of z depends on the value of y and other parameters.

[0018] y: is a coordinate variable in the plane perpendicular to the symmetry axis of the cylindrical lens (assuming the z-axis), usually representing the position in the direction with curvature (i.e. the Y direction mentioned earlier).

[0019] c = 1 / R: where R is the curvature radius of the cylindrical lens in the Y direction, and c is a parameter related to the curvature radius. When R is larger, c is smaller, and the curvature of the cylindrical lens in the Y direction is smaller; on the contrary, when R is smaller, c is larger, and the curvature is larger.

[0020] Ay 4 +By 6 +Cy 8 +Dy 10 +Ey 12 +Fy 14 +Gy 16 +Hy 18 +Iy 20 : This part is the high-order term, which is used to more accurately describe the deviation of the surface shape of the cylindrical lens from the ideal quadratic surface. The existence of these high-order terms can be used to correct aberrations, so that the actual surface shape of the cylindrical lens is more in line with the requirements of the optical system. For example, in some high-precision optical instruments, using only a quadratic surface (i.e. the front part of the formula) to describe the surface shape of the cylindrical lens may not meet the imaging quality requirements, and these high-order terms are needed to further optimize the surface shape and reduce spherical aberration, coma and other aberrations.

[0021] k is a constant related to the surface type, different k values correspond to different types of quadratic surface. For example, when k = 0, it corresponds to a spherical surface; when k = -1, it corresponds to a parabolic surface, etc.

[0022] Advantages:

[0023] The utility model discloses a mode of adding and controlling a cylindrical mirror to control the divergence angle of linear laser, and the distance between the cylindrical mirror and the linear light spot generator is adjusted to realize the lens for adjusting the divergence angle of linear light spot, so that the divergence angle of linear light spot lens can be adjusted in a certain range to meet the demand of adjusting the divergence angle of linear light spot in special use environment. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0025] Figure 1 It is the whole structure schematic diagram of the embodiment of the utility model;

[0026] Figure 2 It is the trend diagram of light rays in the convergent light path lens and linear light spot generation in the utility model;

[0027] Figure 3 It is the trend diagram of light rays in the convergent light path lens, linear light spot generator and cylindrical mirror in the utility model;

[0028] Figure 4 It is the energy distribution when X = 10mm, and the linear light spot divergence angle is 56° at this time;

[0029] Figure 5 It is the energy distribution when X = 15mm, and the linear light spot divergence angle is 45° at this time.

[0030] Mark explanation: 1-main mirror barrel, 2-convergent light path lens, 3-linear light spot generator, 4-clamping groove, 5-first sliding cavity, 6-fiber connector, 7-fiber light source, 8-second sliding cavity, 9-cylindrical mirror fixing piece, 10-cylindrical mirror, 11-setscrew hole, 12-first limit block, 13-pull rod, 14-anti-slip cap, 15-second limit block. DETAILED DESCRIPTION

[0031] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Example 1

[0035] A laser lens with an adjustable divergence angle, such as Figures 1-3 As shown, the system includes a main lens barrel 1, which has a slot 4 for accommodating a condenser lens 2 and a line spot generator 3. The condenser lens 2 and the line spot generator 3 are spaced apart along the optical path. A first sliding cavity 5 is provided on one side of the slot 4, and an optical fiber connector 6 is slidably connected in the first sliding cavity 5. An optical fiber light source 7 is fixedly installed in the middle of the optical fiber connector 6. A second sliding cavity 8 is provided on the other side of the slot 4, and a cylindrical mirror fixing member 9 is slidably connected in the second sliding cavity 8. A cylindrical mirror 10 is fixedly installed in the middle of the cylindrical mirror fixing member 9.

[0036] The side wall of the first sliding cavity 5 is provided with a plurality of top screw holes 11 in horizontal direction, and locking top screws are screwed in the top screw holes 11. The side wall of the second sliding cavity 8 is provided with a plurality of top screw holes 11 in horizontal direction, and locking top screws are screwed in the top screw holes 11. When the fiber connector 6 or the cylindrical lens fixing member 9 is moved to a position corresponding to the top screw holes 11, the fiber connector 6 or the cylindrical lens fixing member 9 is limited by rotating the locking top screws.

[0037] The edge of the first sliding cavity 5 is fixedly provided with a first limiting block 12, and the edge of the second sliding cavity 8 is fixedly provided with a second limiting block 15, so that the fiber connector 6 is prevented from being separated from the first sliding cavity 8 or the cylindrical lens fixing member 9 is prevented from being separated from the second sliding cavity 8.

[0038] The cylindrical lens fixing member 9 is fixedly connected with a pull rod 13 at a surface close to the outer side, and the cylindrical lens fixing member 9 is moved in the second sliding cavity 8 by pulling the pull rod 13. In addition, the fiber connector 6 can also be provided with a pull rod or be pulled or pushed in the first sliding cavity 5 by a wire of the fiber light source 7, and the end of the pull rod 13 is provided with an anti-skid cap 14.

[0039] The cylindrical lens has an aspherical surface structure, and the surface type of the cylindrical lens is one of a concave aspherical surface, a convex aspherical surface and a meniscus lens.

[0040] The X-direction surface radius R of the cylindrical lens is infinite, and the Y-direction surface type function Z is as follows:

[0041]

[0042] C=1 / R

[0043] Working and using process:

[0044] The cylindrical lens fixing member 9 is placed in the second sliding cavity 8, and the cylindrical lens fixing member 9 is slidable in the second sliding cavity 8 to adjust the distance X between the cylindrical lens 10 and the line light spot generator 3. The divergence angle of the line light spot can be controlled by changing the distance X. The second sliding cavity 8 is provided with locking top screws (a plurality of top screw holes are transversely provided), and the locking top screws can fix the cylindrical lens 10 after the distance X is adjusted, so that the cylindrical lens 10 becomes a stable mechanical structure.

[0045] The included angle between the curved surface of the current light path cylindrical lens and the line light spot generated by the line light spot generator is a fixed value and cannot be deviated.

[0046] As Figure 4 With Figure 5 An example of energy distribution curve is shown, and the energy distribution changes with the change of the value of X. However, because the cylindrical lens is specially designed in surface type, the energy distribution remains consistent within a certain range.

[0047] As Figure 4is the energy distribution when X = 10 mm, at which the linear spot divergence angle is 56°.

[0048] As Figure 5 is the energy distribution when X = 15 mm, at which the linear spot divergence angle is 45°.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An adjustable divergence angle laser lens, characterized in that, The utility model relates to a main mirror barrel is provided with the card slot for containing condensing light path lens and line light spot generator in it, and the condensing light path lens and line light spot generator are arranged at intervals along the light path direction, one side of the card slot is equipped with first sliding cavity, and the first sliding cavity is slidably connected with optical fiber connector, the optical fiber connector is fixedly provided with optical fiber light source in the middle part, the other side of the card slot is equipped with second sliding cavity, and the second sliding cavity is slidably connected with cylindrical mirror fixing part, and the cylindrical mirror fixing part is fixedly provided with cylindrical mirror in the middle part.

2. The adjustable divergence angle laser lens of claim 1, wherein, The sidewall of the first sliding cavity is uniformly provided with a plurality of jackscrew holes in the horizontal direction, and the jackscrew holes are threadedly connected with locking jackscrews.

3. The adjustable divergence angle laser lens of claim 1, wherein, The edge of the first sliding cavity is fixedly provided with a first limiting block.

4. The adjustable divergence angle laser lens of claim 1, wherein, The surface close to the outer side of the cylindrical mirror fixing part is fixedly connected with a pull rod.

5. The adjustable divergence angle laser lens of claim 4, wherein, The sidewall of the second sliding cavity is uniformly provided with a plurality of jackscrew holes in the horizontal direction, and the jackscrew holes are threadedly connected with locking jackscrews.

6. The adjustable divergence angle laser lens of claim 5, wherein, The edge of the second sliding cavity is fixedly provided with a second limiting block.

7. The adjustable divergence angle laser lens of claim 4, wherein, The end of the pull rod is provided with an anti-skid cap.

8. The adjustable divergence angle laser lens of claim 1, wherein, The cylindrical mirror has an aspherical surface structure.

9. The adjustable divergence angle laser lens of claim 1, wherein, The surface type of the cylindrical mirror is one of a concave aspherical surface, a convex aspherical surface and a meniscus lens.

10. The adjustable divergence angle laser lens of claim 9, wherein, The X-direction curved surface radius R of the cylindrical mirror is infinite, and the Y-direction surface type function Z is as follows: C = 1 / R Wherein, the curved surface radius R and the conic coefficient K are related to the surface type of the line light spot generator, the R value and the K value can be derived and calculated through the surface type of the line light spot generator, when the curvature radius and the conic coefficient are not enough to meet the adjustment angle and the energy distribution is maintained in a relatively stable state, high-order term optimization or free aspherical surface is needed.

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