CN209765176U

CN209765176U - Energy evenly distributed word line laser module

Info

Publication number: CN209765176U
Application number: CN201920984806.7U
Authority: CN
Inventors: 胡振宁
Original assignee: Fuzhou One Dimensional Tong Guang Technology Co Ltd
Current assignee: Fuzhou One Dimensional Tong Guang Technology Co Ltd
Priority date: 2018-08-07
Filing date: 2019-06-27
Publication date: 2019-12-10
Anticipated expiration: 2029-06-27

Abstract

The utility model discloses an energy evenly distributed word line laser module, including small aspherical surface cylindrical lens and word line formation of image, small aspherical surface cylindrical lens fixes on the sheetmetal, and the sheetmetal sets up in mechanical housing terminal surface recess, and the mechanical housing terminal surface is provided with two screw through-holes, small aspherical surface cylindrical lens sets up in mechanical housing terminal surface recess to the convex surface is installed towards collimating lens group, and recess length size is greater than width size, and small aspherical surface cylindrical lens location is adjusted through straightness accuracy adjusting screw. The energy evenly distributed word line laser module adopts an aspheric surface cylindrical lens product with a brand new structure, and can evenly distribute the energy of a point light spot to a straight line.

Description

Energy evenly distributed word line laser module

Technical Field

The utility model relates to a in laser marking technical field, specifically be an energy evenly distributed word line laser module.

Background

In the laser level product at present, there are various structures that can be realized by realizing the word line imaging, for example, the structure of realizing the word line imaging by using a resin molded wave mirror has the advantages that: the imaging is uniform, and the defects are that: the laser module is large in size, sensitive to temperature change and poor in focusing performance, and the laser module with uniformly distributed energy is mainly installed in a laser level instrument and applied to building linear measurement and horizontal calibration. The system is in the field of machine vision, and can be used for scanning visual detection of an object as a light supplement light source of a linear array camera or be matched with an area array camera as a structured light source to realize three-dimensional imaging by applying a triangulation principle.

The other mainstream structure is that imaging is realized by using a round rod lens, the round rod lens is made of optical glass materials, the round rod lens is adaptive to temperature change, the focusing performance of light spots is good, however, the round rod lens is in one-line imaging of Gaussian energy distribution, and the energy distribution is extremely uneven.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an energy evenly distributed word line laser module to the poor problem of homogeneity that proposes current word line laser facula formation of image among the above-mentioned background art is solved.

In order to achieve the above object, the utility model provides a following technical scheme: a word line laser module with energy uniform distribution comprises a micro aspheric cylindrical lens and a word line image, wherein the micro aspheric cylindrical lens is fixed on a metal sheet, the metal sheet is arranged in a groove on the end face of a machine shell, the end face of the machine shell is provided with two screw through holes, the metal sheet is fixed through screws, the machine shell is connected with a shaft cap of a mechanical part through a straightness adjusting screw, the micro aspheric cylindrical lens is arranged in the groove on the end face of the machine shell, the convex surface of the micro aspheric cylindrical lens faces a collimating lens group, the length size of the groove is larger than the width size, the positioning of the micro aspheric cylindrical lens is adjusted through the straightness adjusting screw, an imaging endpoint reinforcing point is arranged on the word line image, an imaging center reinforcing point is arranged in front of the imaging endpoint reinforcing point, the front end of the micro aspheric cylindrical lens is connected with a laser crystal, and the front end of the laser crystal is provided with a laser diode.

Preferably, the micro aspheric cylindrical lens is composed of 1 polishing paraboloid, 3 polishing planes and 2 side perpendicular rough grinding planes, the 3 polishing planes form an isosceles triangle, the angle a is equal to the angle b, and the paraboloid is in tangent connection with the 2 isosceles ridge planes.

Preferably, the micro aspheric cylindrical lens is an aspheric lens with an axisymmetric plano-convex structure, and a normal of the micro aspheric cylindrical lens coincides with a center point of the base plane.

Preferably, the metal sheet is provided with a through hole, and the metal sheet forms a sliding movable structure through a groove structure at the front end of the mechanical shell.

Preferably, two screw through holes are formed in the end face of the machine shell, and the thread structures on the inner sides of the screw through holes are matched with the thread structures on the surfaces of the screws.

compared with the prior art, the beneficial effects of the utility model are that: the laser module with the uniformly distributed energy for the word line adopts an aspheric surface cylindrical lens product with a brand new structure, and can uniformly distribute the energy of a point light spot to a straight line, the aspheric surface lens with the brand new structure can be matched with collimated light beams with different wavelengths, light spot sizes and light spot shapes to obtain uniform word line imaging with different divergence angles by only changing the profile shape of the aspheric surface, compared with the mainstream products in the current market, the laser module mainly uses a tiny aspheric surface cylindrical lens to replace a round bar lens, the imaging is more uniform, the line spot is brighter, and a laser manufacturer using the laser module can improve the product competitiveness relative to the round bar lens structure; the cost of the complete set of equipment only rises by about 2 percent, and the invention has small volume, good imaging quality and moderate price and is easy to be accepted by market places.

Drawings

FIG. 1 is a light path diagram of a laser-linear line module according to the present invention;

FIG. 2 is an exploded view of the laser-linear module of the present invention;

FIG. 3 is a schematic diagram of the laser-linear module assembly of the present invention;

FIG. 4 is a front view of the basic structure of the micro aspheric cylindrical lens of the present invention;

FIG. 5 is a three-dimensional view of the basic structure of the micro aspheric cylindrical lens of the present invention;

FIG. 6 is an image of a line according to the present invention;

fig. 7 is a three-dimensional view of another structure of the base structure of the micro aspheric cylindrical lens according to the present invention.

Wherein: 1-imaging a central reinforcing point; 2-imaging an endpoint reinforcement point; 3-one word line imaging; 4-normal; 5-roof ridge plane; 6-paraboloid; 7-mechanical piece shaft cap; 8-a screw; 9-a micro aspherical cylindrical lens; 10-a metal sheet; 11-straightness adjusting screws; 12-a machine housing; 13-a collimating lens group; 14-a laser crystal; 15-laser diode.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

referring to fig. 1-7, the present invention provides a technical solution: the micro aspheric cylindrical lens 9 is fixed on a metal sheet 10, the metal sheet 10 is arranged in a groove on the end face of a mechanical shell 12, the micro aspheric cylindrical lens 9 is arranged in the groove on the end face of the mechanical shell 12, the convex surface of the micro aspheric cylindrical lens is installed towards a collimating lens group 13, the length dimension of the groove is larger than the width dimension, the positioning of the micro aspheric cylindrical lens 9 is adjusted through a straightness adjusting screw 11 and is sequentially arranged and installed in the mechanical shell 12, the metal sheet 10 is fixed at the front end of the mechanical shell 12 through a screw 8, the micro aspheric cylindrical lens 9 is placed on the metal sheet 10, the micro aspheric cylindrical lens 9 is composed of 1 polishing paraboloid 6, 3 polishing planes and 2 side-perpendicular rough grinding planes, the 3 polishing planes form an isosceles triangle, an angle a is equal to an angle b, and the paraboloid 6 is tangentially connected with 2 isosceles ridge planes 5, this makes it possible to match the collimated light beam of different wavelength, light spot size and light spot shape to obtain the uniform word line image 3 of different divergence angles by changing the profile of the aspheric surface, and after the collimated light beam is incident from the convex surface of the aspheric lens, the energy of the light beam in the slow axis direction is redistributed by the aspheric surface to form a certain angle divergence, and the fast axis dimension of the light beam is not changed, the line width dimension of the obtained word line light spot is equal to the dimension of the incident light spot in the fast axis direction, if the focused light beam is selected to be incident to the micro aspheric lens 9, the line width dimension of the obtained word line light spot is equal to the dimension of the focus in the fast axis direction, in addition, in order to improve the brightness of the light, the laser needs to be focused in the distance of about three meters, but the micro aspheric lens 9 used in the invention does not change the light path in, the micro aspheric lens 9 is made of optical glass, the high-quality surface quality enables the line width focusing size of a word line to be closer to the design requirement, a bright word line light spot is presented at the focus, the divergence angle of the word line light spot is controllable, the arbitrary divergence angle between 1-120 degrees in the slow axis direction can be obtained by changing the included angle of the ridge plane 5 of the micro aspheric lens 9 and the surface type of the paraboloid 6 to adapt to the application requirement, the convex surface of the light incident of the micro aspheric lens 9 is tangentially connected with the two ridge planes 5 by the paraboloid 6, when the size of the slow axis of the incident light beam is larger than the surface width of the paraboloid 6, the redundant light is refracted by the ridge plane 5 at the two ends of the word line light spot to respectively form an imaging endpoint reinforcing point 2, and if the size of the incident light beam is larger than the light-passing caliber size of the micro aspheric lens 9, the redundant light leaks from the side and is projected in the middle of a word line to form an imaging center reinforced point 1, the bright spot has the function of facilitating the observation of engineering personnel, the micro aspheric lens 9 is an aspheric lens with an axisymmetric structure, the normal 4 of the micro aspheric cylindrical lens 9 is superposed with the center point of a bottom plane, so that the influence of the eccentricity problem on the imaging can be ignored when the module is assembled in a production workshop, the production efficiency is improved, the eccentricity adjustment is very time-consuming in the assembly process, the metal sheet 10 is provided with a through hole, and the metal sheet 10 forms a sliding movable structure through the groove structure at the front end of the mechanical shell 12, so that the metal sheet 10 can slide left and right in the groove at the front end of the mechanical shell 12 to control the relative position of the micro aspheric lens 9 and the laser optical axis so as to obtain the adjustment of the eccentric energy distribution of the word line imaging 3, two screw through holes are formed in the end face of a machine shell 12, a metal sheet 10 is fixed through a screw 8, the machine shell 12 is connected with a machine part shaft cap 7 through a linearity adjusting screw 11, the thread structure in the screw through hole is matched with the thread structure on the surface of the linearity adjusting screw 11, so that the linearity of a word line of imaging can be adjusted by adjusting the linearity adjusting screw 11, an imaging end point strengthening point 2 is arranged on the word line imaging 3, an imaging center strengthening point 1 is arranged in front of the imaging end point strengthening point 2, the front end of a micro aspheric cylindrical lens 9 is connected with a laser crystal 14 through a collimating lens group 13, and a laser diode 15 is arranged at the front end of the laser crystal 14.

The working principle is as follows: when the energy evenly distributed line laser module is used, firstly, the diode laser 15 is coupled into the laser crystal 14, the laser crystal 14 emits laser with a divergence angle, the laser is shaped into a collimated light beam through the collimating lens group 13 at the front end, the shaping lens group can be a plano-convex lens, the laser is incident from a plane, the emergent light of a convex surface is collimated, or the laser can be a combination of a plurality of single lenses, then the collimating lens group 13 arranged at the front end of the laser diode 15 or the laser crystal 14 moves back and forth along the optical axis, so that the collimated light beam can be changed to focus at a position of 3 meters or other distances, a brighter line spot is obtained, then the metal sheet 10 is placed in the groove of the mechanical shell 12, and the process needs to be ensured: the width size of recess equals the width size of sheetmetal 10, can make sheetmetal 10 slide in the recess, then tiny aspherical cylindrical lens mirror 9 places on sheetmetal 10, wherein has three through-hole on the sheetmetal 10, and tiny aspherical cylindrical lens mirror 9 places in the square hole in the middle, need guarantee at this in-process: the dimension of the slow axis direction of the square hole is smaller than the dimension of the slow axis direction of the micro aspheric lens 9 to ensure that the placed micro aspheric lens 9 can not fall off, the dimension of the fast axis direction of the square hole is larger than the dimension of the fast axis direction of the micro aspheric lens 9 to form a hollow, the diameter of the square hole is larger than the diameter of the collimated light beam, the convex surface faces the direction of the collimating lens group 13 when the micro aspheric lens 9 is placed, the convex surface of the micro aspheric lens 9 faces the collimating lens group 13, the normal 4 of the micro aspheric lens 9 is superposed with the laser optical axis, which is a basic structure, according to the requirement of special application, the micro aspheric lens 9 can also move along the slow axis direction to obtain a word line image 3 with special energy distribution, then two through holes at two sides of the metal sheet 10 are fixed with the mechanical housing 12 by screws 8, so that the positioning of the micro aspheric lens 9 on the square hole of the metal sheet 10 is, then, the mechanical part shaft cap 7 is sleeved on the small aspheric surface cylindrical lens 9 to be completely fixed, so that when the device is used, the small aspheric surface lens 9 can automatically coincide the normal line 4 with the laser optical axis, wherein 5 through holes are formed in the end face of the mechanical part shaft cap 7, the middle through hole is a light-passing caliber, the diameter of the light-passing caliber is larger than the width of the small aspheric surface lens 9 and smaller than the diagonal size of the small aspheric surface lens 9, the other 4 through holes are aligned to screw through holes in the end face of the mechanical shell 12, and the energy is uniformly distributed in the using process of the word line laser module.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an energy evenly distributed word line laser module, includes tiny aspherical surface cylindrical lens (9) and a word line formation of image (3), tiny aspherical surface cylindrical lens (9) are fixed on sheetmetal (10), sheetmetal (10) set up in mechanical housing (12) terminal surface recess, mechanical housing (12) terminal surface is provided with two screw through-holes to sheetmetal (10) are fixed through screw (8), and mechanical housing (12) are connected its characterized in that through straightness accuracy adjusting screw (11) and mechanical part axle cap (7): the micro aspheric surface cylindrical lens (9) is arranged in a groove in the end face of a machine shell (12), the convex surface of the micro aspheric surface cylindrical lens faces a collimating lens group (13) for installation, the length dimension of the groove is larger than the width dimension of the groove, the micro aspheric surface cylindrical lens (9) is positioned and adjusted through a straightness adjusting screw (11), an imaging endpoint reinforcing point (2) is arranged on the line imaging (3), an imaging center reinforcing point (1) is arranged in front of the imaging endpoint reinforcing point (2), the front end of the micro aspheric surface cylindrical lens (9) is connected with a laser crystal (14) through the collimating lens group (13), and a laser diode (15) is arranged at the front end of the laser crystal (14).

2. The power-uniform distribution wordline laser module of claim 1, wherein: the micro aspheric cylindrical lens (9) is composed of 1 polishing paraboloid (6), 3 polishing planes and 2 side vertical rough grinding planes, the 3 polishing planes form an isosceles triangle, an angle a is equal to an angle b, and the paraboloid (6) is in tangent connection with the 2 isosceles ridge planes (5).

3. The power-uniform distribution wordline laser module of claim 1, wherein: the micro aspheric surface cylindrical lens (9) is an aspheric surface lens with an axisymmetric plano-convex structure, and a normal (4) of the micro aspheric surface cylindrical lens (9) is coincided with the central point of the bottom plane.

4. The power-uniform distribution wordline laser module of claim 1, wherein: the metal sheet (10) is provided with a through hole, and the metal sheet (10) forms a sliding movable structure through a groove structure at the front end of the mechanical shell (12).

5. The power-uniform distribution wordline laser module of claim 1, wherein: two screw through holes are formed in the end face of the mechanical shell (12), and the thread structures on the inner sides of the screw through holes are matched with the thread structures on the surfaces of the straightness adjusting screws (11).