Laser beam expander

Abstract

The utility model discloses a laser beam expander, and belongs to the technical field of laser beam expanding. The optical lens mainly comprises an optical lens frame, a light emitting opening used for emitting light beams is formed in the center in the optical lens frame, a rotating sleeve and a lens set are connected to the outer wall of the optical lens frame through bearings, the lens set is arranged at the bottom of the rotating sleeve, a focusing lens and a beam expanding mechanism are arranged at the bottom end of the lens set, and the beam expanding mechanism is arranged at the bottom end of the optical lens frame and comprises a connecting plate. The connecting plate is installed at the bottom end of the optical lens holder, the shading plate is installed at the bottom of the connecting plate in a sliding mode, the shading plate is suitable for getting close to or getting away from the center of the connecting plate, a guide shaft and an adjusting disc are arranged at the bottom of the shading plate, the adjusting disc is fixedly installed at the inner bottom of the rotating sleeve, and a driving groove matched with the guide shaft is formed in the adjusting disc. The laser beam expander solves the problem that the light beam of the laser beam expander is inconvenient to adjust.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser beam expander, in particular to a kind of laser beam expander. BACKGROUND

[0002] Laser beam expander is an optical device, mainly used to expand the diameter of laser beam, while reducing the divergence angle of light beam, so as to improve the collimation and energy distribution of laser;

[0003] At the same time, laser has many applications in manufacturing industry, such as laser cutting, laser welding, laser marking, etc.Laser technology can realize high precision, high efficiency processing, and is widely used in metal processing, automobile manufacturing, electronic device manufacturing and other fields.

[0004] In the actual application of existing laser beam expander, its main way is to rotate screw mechanism or linear slide to move lens, change lens spacing to adjust expansion ratio, but in the adjustment mode, multiple lens displacements need to be controlled synchronously, which causes the beam expander to need frequent calibration, therefore, a laser beam expander is needed to solve the above problems;

[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the present application, and therefore, it can contain information which does not constitute prior art. CONTENT OF THE UTILITY MODEL

[0006] Based on the above problems existing in the prior art, the present application solves the problem of inconvenient adjustment of laser beam expander.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a kind of laser beam expander, including optical lens holder, the optical lens holder is arranged with the light emitting port for emitting light beam in the center, the outer wall of the optical lens holder is connected with the rotating sleeve by bearing, lens group, the lens group is arranged at the bottom of the rotating sleeve, the bottom end of the lens group has focusing lens, expansion mechanism, the expansion mechanism is arranged at the bottom end of the optical lens holder, the expansion mechanism includes adapter plate, the adapter plate is installed at the bottom end of the optical lens holder, light shield plate, the light shield plate is slidably installed at the bottom of the adapter plate, the light shield plate is suitable for approaching or moving away from the center of the adapter plate, the bottom of the light shield plate is provided with guide shaft, adjusting disc, the adjusting disc is fixedly installed in the bottom of the rotating sleeve, the adjusting disc is provided with driving groove matched with the guide shaft.

[0008] Preferably, at least three groups of sliding grooves are formed in the bottom of the adapter plate, the top of the light shield plate is provided with guide block matched with the sliding groove, and the guide block and the sliding groove are slidably connected.

[0009] Preferably, the driving groove is arc-shaped.

[0010] Preferably, the light shielding plate is triangular in structure, and the central end of the light shielding plate is arc-shaped.

[0011] Preferably, the lens group comprises a fixed shaft connected to the bottom of the rotating sleeve, and a bottom shaft threadedly connected to the fixed shaft, and the focusing lens is mounted in the bottom shaft.

[0012] The laser beam expander provided by the application is capable of moving the light shielding plate towards or away from the center of the adapter by the sliding cooperation between the guide block on the light shielding plate and the sliding groove on the adapter, and the rotating sleeve drives the rotating of the driving groove on the adjusting disc, and the inner wall of the driving groove drives the movement of the guide shaft on the light shielding plate, and indirectly drives each group of light shielding plates to move towards or away from the center of the adapter, thereby achieving the purpose of controlling the size of the light beam and solving the problem of inconvenient adjustment of the light beam of the laser beam expander.

[0013] In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application, the exemplary embodiments of the application and their description serve to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0015] Figure 1 Fig. 1 is a schematic view of the overall structure of a laser beam expander in the application;

[0016] Figure 2 Fig. 2 is a schematic view of the cross-sectional structure of the laser beam expander in the application; Figure 1

[0017] Fig. 3 is a schematic view of the exploded structure of the beam expanding mechanism in the application; Figure 3 Figure 2

[0018] In the drawings, various reference signs represent:

[0019] 1, optical lens holder; 11, light emitting port; 2, rotating sleeve; 21, adjusting disc; 211, driving groove; 3, lens group; 31, fixed shaft; 32, bottom shaft; 33, focusing lens; 4, beam expanding mechanism; 41, adapter; 411, sliding groove; 42, light shielding plate; 421, guide block; 422, guide shaft. DETAILED DESCRIPTION

[0020] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0021] ​​In order to enable the person skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0022] As shown in Figures 1-2 The present application provides a laser beam expander, which comprises a light lens holder 1, a rotating sleeve 2 connected with the outer wall bearing at the bottom of the light lens holder 1, the rotating sleeve 2 is adapted to rotate on the light lens holder 1, and a light emitting port 11 for emitting light beams is arranged at the center of the light lens holder 1;

[0023] A lens group 3 is arranged at the bottom of the rotating sleeve 2, the lens group 3 is composed of a fixed shaft 31 fixedly connected with the bottom of the rotating sleeve 2 and a bottom shaft 32 threadedly connected with the fixed shaft 31, and a focusing lens 33 is fixedly installed at the bottom end port of the bottom shaft 32, the focusing lens 33 is adapted to focus the light beams emitted by the light emitting port 11, and the thread connection between the fixed shaft 31 and the bottom shaft 32 facilitates the maintenance and replacement of the focusing lens 33;

[0024] As shown in Figures 2-3 An expansion mechanism 4 is arranged at the bottom end of the light lens holder 1, the expansion mechanism 4 is used for adjusting the diameter of the light beams emitted into the lens group 3, the expansion mechanism 4 comprises a connecting plate 41 installed at the bottom end of the light lens holder 1, the connecting plate 41 is disc-shaped, at least three groups of ring-shaped sliding grooves 411 are arranged below the connecting plate 41, a light shielding plate 42 corresponding in number to the sliding grooves 411 is installed on the connecting plate 41, the light shielding plate 42 is provided with guide blocks 421 adapted to the sliding grooves 411 on the top surface of the light shielding plate 42, the guide blocks 421 are adapted to slide along the sliding grooves 411 and synchronously drive the light shielding plate 42 to move close to or away from the center of the connecting plate 41;

[0025] The light shielding plate 42 is in a triangular structure, so that the light shielding plate 42 is adapted to be arranged in a ring shape on the connecting plate 41, and the end of the light shielding plate 42 at the center of the connecting plate 41 is in an arc shape;

[0026] Meanwhile, an adjusting disc 21 is installed at the bottom of the rotating sleeve 2, at least three groups of driving grooves 211 are arranged on the adjusting disc 21, the driving grooves 211 are arranged in an arc shape, guide shafts 422 corresponding to the driving grooves 211 are arranged at the bottom of the light shielding plate 42, and the guide shafts 422 are in the driving grooves 211;

[0027] In the present application, the rotating sleeve 2 is mainly driven by an external motor, and the specific structure and principle thereof will not be described in detail here;

[0028] When the diameter of the light beam entering the lens group 3 needs to be adjusted, first rotate the rotating sleeve 2, so that the adjusting disc 21 is suitable for rotating under the driving of the rotating sleeve 2, and the driving groove 211 is rotated synchronously, and the inner wall of the driving groove 211 pushes the guide shaft 422, and under the cooperation of the guide block 421 and the sliding groove 411, each set of light shielding plate 42 is driven to move towards or away from the center of the connecting plate 41 synchronously;

[0029] In summary, through the sliding cooperation between the guide block 421 on the light shielding plate 42 and the sliding groove 411 on the connecting plate 41, the light shielding plate 42 is suitable for moving towards or away from the center of the connecting plate 41, and the rotating sleeve 2 drives the driving groove 211 on the adjusting disc 21 to rotate, and cooperates with the inner wall of the driving groove 211 to drive the guide shaft 422 on the light shielding plate 42 to move, and indirectly drives each set of light shielding plate 42 to move towards or away from the center of the connecting plate 41 synchronously, so as to realize the purpose of controlling the diameter of the light beam, and solve the problem of inconvenient adjustment of the laser beam expander.

[0030] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any improvement and modification within the spirit and principle of the present application without departing from the principle of the present application should be considered as within the protection scope of the present application.

Claims

1. A laser beam expander, comprising: a light lens holder (1) provided with a light emitting port (11) for emitting a light beam at the center of the light lens holder (1), and a rotating sleeve (2) bearing connected to the outer wall of the light lens holder (1); a lens group (3) provided at the bottom of the rotating sleeve (2), the lens group (3) having a focusing lens (33) at the bottom end; a beam expanding mechanism (4) provided at the bottom end of the light lens holder (1), characterized in that the beam expanding mechanism (4) comprises: a connecting plate (41) mounted at the bottom end of the light lens holder (1); a light shield plate (42) slidingly mounted at the bottom of the connecting plate (41), the light shield plate (42) being adapted to move towards or away from the center of the connecting plate (41), and the bottom of the light shield plate (42) being provided with a guide shaft (422); an adjusting disc (21) fixedly mounted at the inner bottom of the rotating sleeve (2), the adjusting disc (21) being provided with a driving groove (211) adapted to the guide shaft (422).

2. A laser beam expander according to claim 1, characterized in that: At least three groups of sliding grooves (411) are formed at the bottom of the connecting plate (41), and the light shield plate (42) is provided with guide blocks (421) adapted to the sliding grooves (411), the guide blocks (421) and the sliding grooves (411) being slidingly fitted.

3. A laser beam expander according to claim 2, wherein: The driving groove (211) is arc-shaped.

4. A laser beam expander according to claim 3, wherein: The light shield plate (42) is triangular in structure, and the center end of the light shield plate (42) is arc-shaped.

5. A laser beam expander according to claim 4, wherein: The lens group (3) comprises a fixed shaft (31) connected to the bottom of the rotating sleeve (2), and a bottom shaft (32) threadedly connected to the fixed shaft (31), and the focusing lens (33) is mounted in the bottom shaft (32).

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