CN213469975U

CN213469975U - Lens group capable of generating annular light spots

Info

Publication number: CN213469975U
Application number: CN202022601786.6U
Authority: CN
Inventors: 曾帅; 李琼霞; 张洁
Original assignee: Wuhan Maojiu Photo Electronic Technology Co ltd
Current assignee: Wuhan Maojiu Photo Electronic Technology Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-06-18
Anticipated expiration: 2030-11-11

Abstract

The utility model provides a lens group that can produce annular facula, include first conical prism, second conical prism and the focusing mirror that the light path direction along laser beam set up at the interval in proper order, first conical prism is equipped with first incident end face, first exit terminal surface and second exit terminal surface constitute the toper concave surface, second conical prism is equipped with second incident end face, third incident end face and third exit terminal surface, second incident end face and third incident end face constitute the toper convex surface, second incident end face is parallel relative with first exit terminal surface, third incident end face is parallel relative with second exit terminal surface, laser beam is behind first conical prism, second conical prism refraction, behind the focusing mirror focus again, can form annular facula on the surface of treating the machined part.

Description

Lens group capable of generating annular light spots

Technical Field

The utility model relates to a laser beam machining technical field especially relates to a lens group that can produce annular facula.

Background

The laser tin welding system uses a laser diode as a heat source, carries out local non-contact heating through laser, and has the advantages of non-contact property, no need of replacing a soldering bit, small laser beam diameter and the like. Laser soldering is widely applied to the field of semiconductors, semiconductor welding products are various in types, welding points are various in shapes, and the requirements of products cannot be met by the existing single-point laser spot welding.

Disclosure of Invention

In view of this, the utility model provides a lens group that can produce annular facula.

Further, the first incident end surface transmits the laser light, and the first and second exit end surfaces refract the laser light.

Further, the second incident end surface and the third incident end surface refract the laser light, and the third exit end surface transmits the laser light.

Further, the relative positions of the first conical prism and the second conical prism can be adjusted.

Further, the relative position of the second conical prism and the focusing mirror is fixed.

Further, the central axes of the first conical prism, the second conical prism and the focusing mirror are coaxial.

Furthermore, the focusing lens is a convex lens.

The utility model provides a beneficial effect that technical scheme brought is: the lens group provided by the utility model is provided with the first conical prism and the second conical prism, after the laser beam is refracted by the first conical prism and the second conical prism and focused by the focusing mirror, an annular light spot can be formed on the surface of a workpiece to be processed, and the condition that the middle point needs to be avoided at the soldering position can be met; the utility model provides a relative position of first conical prism of lens group and second conical prism is adjustable, can produce the not annular facula of equidimension, satisfies various product processing demands.

Drawings

Fig. 1 is a schematic structural view of a lens assembly capable of generating an annular light spot according to embodiment 1 of the present invention.

Fig. 2 is a schematic light path diagram of a lens assembly capable of generating an annular light spot according to embodiment 1 of the present invention.

Fig. 3 is a schematic structural view of a lens assembly capable of generating an annular light spot according to embodiment 2 of the present invention

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.

Example 1:

referring to fig. 1, an embodiment 1 of the present invention provides a lens assembly capable of generating an annular light spot, including a first tapered prism 10, a second tapered prism 20 and a focusing mirror 30, which are sequentially disposed at intervals along a light path direction of a laser beam, wherein central axes of the first tapered prism 10, the second tapered prism 20 and the focusing mirror 30 are coaxial; the relative positions of the first tapered prism 10 and the second tapered prism 20 are adjustable, and the relative positions of the second tapered prism 20 and the focusing mirror 30 are fixed.

The first conical prism 10 is provided with a first incident end face 101, a first emergent end face 102 and a second emergent end face 103, a certain included angle is formed between the first emergent end face 102 and the second emergent end face 103, and the first emergent end face 102 and the second emergent end face 103 form a conical concave surface.

The second tapered prism 20 is provided with a second incident end surface 201, a third incident end surface 202 and a third emergent end surface 203, a certain included angle is formed between the second incident end surface 201 and the third incident end surface 202, the second incident end surface 201 and the third incident end surface 202 form a tapered convex surface, the second incident end surface 201 is parallel and opposite to the first emergent end surface 102, and the third incident end surface 202 is parallel and opposite to the second emergent end surface 103.

In this embodiment 1, the focusing mirror 30 is a convex lens.

Referring to fig. 2, the optical path principle of the lens assembly provided in this embodiment 1 is as follows:

one beam of parallel laser beams reaches the first emergent end face 102 and the second emergent end face 103 after being transmitted by the first incident end face 101, the parallel laser beams reaching the first emergent end face 102 are refracted by the first emergent end face 102, the propagation direction is changed from the horizontal direction to the inclined direction, then the parallel laser beams enter the second incident end face 201 in an inclined shape, the second incident end face 201 refracts the laser beams for the second time, and the second incident end face 201 is parallel to the first emergent end face 102, so that the propagation direction of the laser beams after the secondary refraction is changed from the inclined direction to the horizontal direction, and then the laser beams are transmitted to the focusing mirror 30 through the third emergent end face 203;

the parallel laser beam reaching the second exit end face 103 is refracted by the second exit end face 103, the propagation direction of the parallel laser beam is changed from the horizontal direction to the inclined direction, then the parallel laser beam enters the third entrance end face 202 in an inclined shape, the laser beam is refracted for the second time by the third entrance end face 202, and the propagation direction of the laser beam after the secondary refraction is changed from the inclined direction to the horizontal direction again because the third entrance end face 202 is parallel to the second exit end face 103, and then the laser beam is transmitted to the focusing mirror 30 through the third exit end face 203;

in summary, after being refracted by the first conical prism 10 and the second conical prism 20, one of the parallel laser beams is changed into two parallel laser beams with a certain interval, and the two parallel laser beams with a certain interval are focused by the focusing mirror 30 to form an annular light spot M1 on the surface of the workpiece to be processed.

Example 2:

referring to fig. 3, compared to example 1, in this example 2, the distance between the first tapered prism 10 and the second tapered prism 20 of the lens group is increased, that is, the relative position between the first tapered prism 10 and the second tapered prism 20 is changed, and after the relative position between the first tapered prism 10 and the second tapered prism 20 is adjusted, an annular light spot M2 is formed on the surface of the workpiece to be processed, and the size of the annular light spot M2 is larger than that of the annular light spot M1 in example 1.

The above mentioned parts are not related to the prior art.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a can produce lens group of annular facula, its characterized in that includes first conical prism, second conical prism and the focusing mirror that sets up along laser beam's light path direction interval in proper order, first conical prism is equipped with first incident end face, first emergent terminal surface and second emergent terminal surface constitute the toper concave surface, second conical prism is equipped with second incident end face, third incident end face and third emergent terminal surface, second incident end face and third incident end face constitute the toper convex surface, second incident end face is parallel relative with first emergent terminal surface, third incident end face is parallel relative with second emergent terminal surface, laser beam can form annular facula at the surface of treating the machined part after first conical prism, second conical prism refraction, focus through the focusing mirror again.

2. The set of lenses capable of generating an annular spot of claim 1, wherein the first entrance face transmits laser light and the first and second exit faces refract laser light.

3. The set of lenses capable of generating an annular spot of claim 1, wherein the second entrance face and the third entrance face refract laser light and the third exit face transmits laser light.

4. The set of lenses capable of generating an annular spot of light of claim 1, wherein the relative positions of the first and second tapered prisms are adjustable.

5. The set of lenses capable of generating an annular light spot according to claim 1, wherein the central axes of the first tapered prism, the second tapered prism and the focusing mirror are coaxial.

6. The set of lenses capable of generating an annular spot of claim 1, wherein the focusing lens is a convex lens.