CN-121995595-A - Variable-magnification beam expansion structure system

CN121995595ACN 121995595 ACN121995595 ACN 121995595ACN-121995595-A

Abstract

The invention belongs to the technical field of laser processing, and discloses a variable-magnification beam expansion structure system which is characterized by comprising a first optical component, a second optical component and a third optical component, wherein relative position adjustment along the optical axis direction is realized between the first optical component and the second optical component and between the second optical component and the third optical component through a threaded connection mechanism respectively, the magnification ratio of the beam expansion system can be changed due to relative position change between the first optical component and the second optical component, and the beam divergence angle of the beam expansion system can be changed due to relative position change between the second optical component and the third optical component. The adjustable connecting mechanism is adopted to realize relative position adjustment, so that the system structure is obviously simplified, the manufacturing difficulty and the system cost are reduced, and meanwhile, the continuous adjustment of the magnification and the beam divergence angle can be realized, and the requirements of different laser processing scenes are met.

Inventors

ZOU WUBING
WU FEILONG
Zheng Shue

Assignees

深圳市韵腾激光科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260317

Claims (10)

1. A variable-magnification beam expansion structure system is characterized by comprising a first optical component, a second optical component and a third optical component, wherein relative position adjustment along the optical axis direction is realized between the first optical component and the second optical component and between the second optical component and the third optical component through threaded connection mechanisms respectively, the magnification of the beam expansion system can be changed due to relative position change between the first optical component and the second optical component, and the beam divergence angle of the beam expansion system can be changed due to relative position change between the second optical component and the third optical component.
2. The variable magnification beam expansion structure system of claim 1, wherein the threaded connection mechanism between the first optical component and the second optical component comprises a first threaded portion provided on the first optical component and a second threaded portion provided on the second optical component, the first threaded portion being threadedly engaged with the second threaded portion, and wherein the threaded connection mechanism between the second optical component and the third optical component comprises a third threaded portion provided on the second optical component and a fourth threaded portion provided on the third optical component, the third threaded portion being threadedly engaged with the fourth threaded portion.
3. The variable magnification beam expansion structure system according to claim 2, wherein the first screw thread portion is disposed at an exit end of the first optical component, the second screw thread portion is disposed at an entrance end of the second optical component, the third screw thread portion is disposed at an exit end of the second optical component, and the fourth screw thread portion is disposed at an entrance end of the third optical component.
4. The variable magnification beam expander structure system of claim 2, wherein the first optical component is movable in the optical axis direction within the second optical component by the screw engagement of the first screw portion and the second screw portion, and wherein the third optical component is movable in the optical axis direction within the second optical component by the screw engagement of the third screw portion and the fourth screw portion.
5. The variable magnification beam expansion structure system according to claim 1, wherein a first lens, a second lens and a third lens are respectively arranged in the first optical component, the second optical component and the third optical component, and the first lens, the second lens and the third lens are respectively coaxially fixed in the respective optical components through fixing mechanisms.
6. The beam expanding system according to claim 5, wherein the fixing mechanism is a pressing ring, and the first lens, the second lens and the third lens are respectively tightly attached to the respective optical components through the corresponding pressing rings.
7. The variable magnification beam expansion structure system of claim 5, wherein a distance is provided between the first lens and the second lens and between the second lens and the third lens.
8. The variable magnification beam expansion structure system according to claim 1, further comprising a first locking mechanism and a second locking mechanism, wherein the first locking mechanism is arranged at a connection part of the first optical assembly and the second optical assembly and is used for fixing the adjusted relative positions of the first optical assembly and the second optical assembly, and the second locking mechanism is arranged at a connection part of the second optical assembly and the third optical assembly and is used for fixing the adjusted relative positions of the second optical assembly and the third optical assembly.
9. The variable magnification beam expander structure system of claim 8, wherein the first locking mechanism and the second locking mechanism are set screws.
10. The variable magnification beam expansion structure system according to claim 1, wherein a magnification indicating mechanism is arranged on the second optical component, and the magnification indicating mechanism comprises a position mark arranged on the second optical component, wherein the position mark is used for indicating the magnification corresponding to the adjusting positions of the first optical component and the third optical component.

Description

Variable-magnification beam expansion structure system Technical Field The invention relates to the technical field of laser processing, in particular to a variable-magnification beam expanding structure system. Background Along with the rapid development of laser processing technology, the requirements on the quality of laser beams in the fields of precise punching, cutting, welding and the like are increasingly improved, and the requirements of a variable-magnification beam expander capable of flexibly adjusting the diameter and the divergence angle of the laser beams appear. In the prior art, a fixed-magnification beam expander is generally adopted or a complex multi-lens adjusting mechanism is driven by a motor to realize the adjustment of the parameters of the light beam, but the method relies on a precise driving assembly and a complex mechanical structure, so that the manufacturing cost is high, the assembly difficulty is high, parameter drift is easy to occur in a vibration environment, and the fixed-magnification scheme is difficult to adapt to various processing scenes and equipment needs to be frequently replaced. Therefore, a solution is needed to the problem of how to realize continuous variable-magnification beam expansion and ensure the stability of an optical system in a simple and reliable manner with low cost in the prior art. Disclosure of Invention The invention mainly aims to provide a variable-magnification beam expansion structure system, which aims to solve the technical problems of how to realize continuous variable-magnification beam expansion in a simple, reliable and low-cost mode and ensure the stability of an optical system in the prior art. In order to achieve the above object, a first aspect of the present invention provides a method for realizing continuous variable magnification beam expansion and ensuring stability of an optical system in a simple and reliable manner at low cost in the prior art, wherein the method comprises a first optical component, a second optical component and a third optical component, relative position adjustment between the first optical component and the second optical component and between the second optical component and the third optical component along the optical axis direction is realized through a threaded connection mechanism respectively, and relative position change between the first optical component and the second optical component can change the magnification of the beam expansion system and relative position change between the second optical component and the third optical component can change the beam divergence angle of the beam expansion system. Further, the threaded connection mechanism between the first optical component and the second optical component comprises a first threaded portion arranged on the first optical component and a second threaded portion arranged on the second optical component, the first threaded portion is in threaded fit with the second threaded portion, and the threaded connection mechanism between the second optical component and the third optical component comprises a third threaded portion arranged on the second optical component and a fourth threaded portion arranged on the third optical component, and the third threaded portion is in threaded fit with the fourth threaded portion. Further, the first thread part is arranged at the emergent end of the first optical component, the second thread part is arranged at the incident end of the second optical component, the third thread part is arranged at the emergent end of the second optical component, and the fourth thread part is arranged at the incident end of the third optical component. Further, the first optical component can move in the optical axis direction in the second optical component by the threaded engagement of the first threaded portion and the second threaded portion, and the third optical component can move in the optical axis direction in the second optical component by the threaded engagement of the third threaded portion and the fourth threaded portion. Further, a first lens, a second lens and a third lens are respectively arranged in the first optical assembly, the second optical assembly and the third optical assembly, and the first lens, the second lens and the third lens are respectively coaxially fixed in the respective optical assemblies through fixing mechanisms. The first lens, the second lens and the third lens are respectively tightly attached to respective optical components through corresponding pressing rings. Further, a certain interval is formed between the first lens and the second lens and between the second lens and the third lens. The optical system further comprises a first locking mechanism and a second locking mechanism, wherein the first locking mechanism is arranged at the connection part of the first optical assembly and the second optical assembly and used for fixing the adjusted relative positions of the first