CN219758592U - Beam expanding device - Google Patents
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- CN219758592U CN219758592U CN202321697624.4U CN202321697624U CN219758592U CN 219758592 U CN219758592 U CN 219758592U CN 202321697624 U CN202321697624 U CN 202321697624U CN 219758592 U CN219758592 U CN 219758592U
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- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 12
- 239000003292 glue Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
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- 238000002059 diagnostic imaging Methods 0.000 description 2
- 230000002301 combined effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model relates to a beam expanding device, which relates to the field of optics and comprises a fast axis beam expanding component for expanding a fast axis and a slow axis beam expanding component for expanding a slow axis, wherein the optical axis of the fast axis beam expanding component and the optical axis of the slow axis beam expanding component are on the same straight line, and the fast axis beam expanding component and the slow axis beam expanding component are sequentially arranged at intervals along the incidence direction of light, or the slow axis beam expanding component and the fast axis beam expanding component are sequentially arranged at intervals along the incidence direction of light. The beneficial effects of the utility model are as follows: the beam expander is a refraction type beam expander, uses the Galilean telescope principle to expand beams, adopts a mode of expanding beams respectively on a fast axis and a slow axis to expand beams, and can greatly reduce the volume of an optical system.
Description
Technical Field
The utility model relates to the field of optics, in particular to a beam expanding device.
Background
A beam expander is an optical element that focuses and concentrates a beam of light into a small area. The principle is based on a combination of fresnel lenses and mirrors. The beam expander consists of a convex lens and a convex reflecting mirror. Light enters the beam expander from the convex lens and is focused on one side of the lens. The mirror then concentrates the light into a smaller area by reflection. This focusing effect is due to the combined effect of the refraction of the convex lens and the reflection of the convex mirror. The convex lens focuses the light on the surface of the reflector, and the reflector reflects and gathers the light on the focus on the other side. The beam expander is widely applied to the fields of laser technology, optical communication, medical imaging and the like. The laser beam laser can make the energy density of the laser beam higher and the diameter of the laser beam smaller, thereby improving the precision and efficiency of laser processing and medical imaging.
The beam expanding device of Gaussian beams expands the Gaussian beams by adjusting the divergence angle of the Gaussian beams, is a common Gaussian beam shaping device in the market, and is mainly divided into two types of refraction and reflection, and the light path structure adopted by the two types of devices is an inverted light path structure of a telescope. The type of beam expansion of the inverted telescope is divided into a Galilean type and a Kepler type, and the Galilean principle optical path is more compact than the Kepler principle optical path. The traditional laser beam expanding principle adopts an integral beam expanding mode to expand beams, and the beam expanding device has large volume.
Disclosure of Invention
The utility model aims to solve the technical problem of reducing the volume of a beam expanding device.
The technical scheme for solving the technical problems is as follows: the utility model provides a beam expanding device, includes the fast axis beam expanding subassembly that expands the beam to the fast axis and the slow axis beam expanding subassembly that expands the beam to the slow axis, the optical axis of fast axis beam expanding subassembly with the optical axis of slow axis beam expanding subassembly is on same straight line, fast axis beam expanding subassembly with slow axis beam expanding subassembly sets up along the incident direction interval in proper order of light, perhaps slow axis beam expanding subassembly with fast axis beam expanding subassembly sets up along the incident direction interval in proper order of light.
The beneficial effects of the utility model are as follows: the beam expander is a refraction type beam expander, uses the Galilean telescope principle to expand beams, adopts a mode of expanding beams respectively on a fast axis and a slow axis to expand beams, and can greatly reduce the volume of an optical system.
On the basis of the technical scheme, the utility model can be improved as follows.
Further, the fast axis beam expanding assembly comprises a first lens and a second lens which are sequentially arranged at intervals along the incidence direction of light, the first lens is a biconcave cylindrical lens, the second lens is a plano-convex cylindrical lens, and the generatrix of the first lens and the generatrix of the second lens are parallel to each other.
The beneficial effects of adopting the further scheme are as follows: the first lens makes the divergence angle of the beam in the fast axis direction larger, the second lens makes the beam in the fast axis direction converged, and finally the beam is emitted in parallel.
Further, the first lens comprises a first plano-concave cylindrical mirror and a second plano-concave cylindrical mirror which are fixedly connected, the cylindrical surfaces of the first plano-concave cylindrical mirror and the cylindrical surfaces of the second plano-concave cylindrical mirror are arranged in a back-to-back mode, bus bars of the first plano-concave cylindrical mirror and the second plano-concave cylindrical mirror are parallel to each other, and the refractive index of the first plano-concave cylindrical mirror is smaller than that of the second plano-concave cylindrical mirror.
The second flat concave cylindrical mirror is made of ZF6, and the second lens is made of H-K9L.
Further, the distance between the first lens and the second lens is 10-20mm.
The beneficial effects of adopting the further scheme are as follows: the beam expansion times of the first lens and the second lens are 2-5 times.
Further, the slow-axis beam expanding assembly comprises a third lens and a fourth lens which are sequentially arranged at intervals along the incidence direction of light, the third lens is a plano-convex cylindrical lens, the fourth lens is a plano-concave cylindrical lens, and the generatrix of the third lens is parallel to the generatrix of the fourth lens.
The beneficial effects of adopting the further scheme are as follows: the third lens converges the beam in the slow axis direction, the fourth lens diverges the beam in the slow axis direction, and finally the beam is emitted in parallel.
Further, the refractive index of the third lens is smaller than the refractive index of the fourth lens.
Further, the material of the third lens is H-K9L, and the material of the fourth lens is ZF6.
Further, the distance between the third lens and the fourth lens is 10-20mm.
The beneficial effects of adopting the further scheme are as follows: the beam expansion times of the third lens and the fourth lens are 0.2-1 times.
Further, the beam expander comprises a beam expander shell and a beam expander upper cover, wherein the beam expander shell and the beam expander upper cover are detachably connected and form an installation cavity on the inner sides of the beam expander shell and the beam expander upper cover, the beam expander shell is provided with an installation groove, the fast axis beam expander assembly and the slow axis beam expander assembly are positioned in the installation cavity and are both fixed in the installation groove, and the two ends of the beam expander shell are provided with a light inlet hole and a light outlet hole.
The beneficial effects of adopting the further scheme are as follows: the beam expanding housing is configured to receive the fast axis beam expanding assembly and the slow axis beam expanding assembly.
Drawings
FIG. 1 is a three-dimensional view of a fast axis beam expanding assembly and a slow axis beam expanding assembly of the present utility model;
FIG. 2 is a front view of a fast axis beam expanding assembly and a slow axis beam expanding assembly;
FIG. 3 is a schematic diagram of the structure of the fast axis beam expanding assembly and the slow axis beam expanding assembly mounted on the beam expanding housing;
FIG. 4 is a three-dimensional view of the expanded beam housing;
FIG. 5 is a three-dimensional view of the expanded beam upper cover;
fig. 6 is an exploded view of the beam expander of the present utility model.
In the drawings, the list of components represented by the various numbers is as follows:
1. a first lens; 101. a first plano-concave cylindrical mirror; 102. a second plano-concave cylindrical mirror; 2. a second lens; 3. a third lens; 4. a fourth lens; 5. a beam expanding housing; 6. and a beam expanding upper cover.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
As shown in fig. 1 to 6, this embodiment provides a beam expanding device, including a fast axis beam expanding component for expanding a fast axis beam and a slow axis beam expanding component for expanding a slow axis beam, an optical axis of the fast axis beam expanding component and an optical axis of the slow axis beam expanding component are on the same straight line, and the fast axis beam expanding component and the slow axis beam expanding component are sequentially arranged at intervals along an incident direction of light, or the slow axis beam expanding component and the fast axis beam expanding component are sequentially arranged at intervals along the incident direction of light.
The beam expander is a refraction type beam expander, uses the Galilean telescope principle to expand beams, adopts a mode of expanding beams respectively on a fast axis and a slow axis to expand beams, and can greatly reduce the volume of an optical system.
Specifically, the fast axis beam expanding assembly and the slow axis beam expanding assembly are characterized in that the divergence angle of the collimated incident beam is changed, so that the diameter of a required light spot is changed, and the Gaussian beam is still Gaussian after being shaped by an optical system. The beam expanding device has the characteristics of compact structure, small volume and simple and convenient operation.
Wherein the slow axis is the direction of the light vector with slow propagation speed in the lens. The fast axis is the direction of the light vector with a fast propagation speed in the lens.
On the basis of the technical scheme, the fast axis beam expanding assembly comprises a first lens 1 and a second lens 2 which are sequentially arranged at intervals along the incidence direction of light, the first lens 1 is a biconcave cylindrical lens, the second lens 2 is a plano-convex cylindrical lens, and a generatrix of the first lens 1 and a generatrix of the second lens 2 are parallel to each other.
The first lens 1 enlarges the divergence angle of the beam in the fast axis direction, the second lens 2 converges the beam in the fast axis direction, and finally the beam is emitted in parallel.
Wherein, the generating line of the first lens 1 refers to: generating line of cylindrical surface of biconcave cylindrical lens; the generatrix of the second lens 2 means: generating line of cylindrical surface of plano-convex cylindrical lens.
Specifically, as shown in fig. 1 and 2, the cylindrical surface of the second lens 2 is disposed opposite to the direction of the first lens 1.
Alternatively, the first lens 1 is rectangular.
Optionally, the second lens 2 is rectangular.
On the basis of the above technical solution, the first lens 1 includes a first plano-concave cylindrical lens 101 and a second plano-concave cylindrical lens 102 that are fixedly connected, the cylindrical surfaces of the first plano-concave cylindrical lens 101 and the cylindrical surfaces of the second plano-concave cylindrical lens 102 are arranged in opposite directions, bus lines of the two are parallel to each other, and the refractive index of the first plano-concave cylindrical lens 101 is smaller than that of the second plano-concave cylindrical lens 102.
Specifically, the generatrix of the cylindrical surface of the first plano-concave cylindrical mirror 101 and the generatrix of the cylindrical surface of the second plano-concave cylindrical mirror 102 are parallel to each other.
On the basis of the above technical solution, the material of the first plano-concave cylindrical lens 101 is H-K9L, the material of the second plano-concave cylindrical lens 102 is ZF6, and the material of the second lens 2 is H-K9L.
On the basis of the technical scheme, the distance between the first lens 1 and the second lens 2 is 10-20mm.
The beam expansion times of the first lens 1 and the second lens 2 are 2-5 times.
On the basis of the technical scheme, the slow-axis beam expanding assembly comprises a third lens 3 and a fourth lens 4 which are sequentially arranged at intervals along the incidence direction of light, the third lens 3 is a plano-convex cylindrical lens, the fourth lens 4 is a plano-concave cylindrical lens, and the generatrix of the third lens 3 is parallel to the generatrix of the fourth lens 4.
The third lens 3 converges the slow axis direction beam, the fourth lens 4 diverges the slow axis direction beam, and finally the beam is emitted in parallel.
Specifically, the generatrix of the third lens 3 is perpendicular to the generatrix of the second lens 2 or the first lens 1, and the generatrix of the fourth lens 4 is perpendicular to the generatrix of the second lens 2 or the first lens 1. The generatrix of the first lens 1, the second lens 2, the third lens 3, and the fourth lens 4 is perpendicular to the incident direction of the light.
Optionally, the third lens 3 is rectangular.
Optionally, the fourth lens 4 is rectangular.
On the basis of the above technical solution, the refractive index of the third lens 3 is smaller than the refractive index of the fourth lens 4.
On the basis of the technical scheme, the material of the third lens 3 is H-K9L, and the material of the fourth lens 4 is ZF6.
On the basis of the technical scheme, the distance between the third lens 3 and the fourth lens 4 is 10-20mm.
The beam expansion times of the third lens 3 and the fourth lens 4 are 0.2-1 times.
On the basis of the technical scheme, the beam expander further comprises a beam expander shell 5 and a beam expander upper cover 6, the beam expander shell 5 and the beam expander upper cover 6 are detachably connected and form an installation cavity on the inner sides of the beam expander shell 5, the beam expander shell 5 is provided with an installation groove, the fast axis beam expander assembly and the slow axis beam expander assembly are located in the installation cavity and are both fixed in the installation groove, and two ends of the beam expander shell 5 are provided with light inlet holes and light outlet holes.
The beam expanding housing 5 is adapted to receive a fast axis beam expanding assembly and a slow axis beam expanding assembly.
Specifically, the light entrance hole and the light exit hole are coaxially arranged.
Specifically, as shown in fig. 3, 4 and 6, the left and right ends of the beam expanding housing 5 extend upward to form end walls, and the mounting groove is transversely formed between the two end walls, and the two end walls are respectively provided with a light inlet hole and a light outlet hole. The front and rear sides of the beam expanding upper cover 6 extend downwards and are matched with the shape of the beam expanding shell 5, the area between the two end walls of the beam expanding shell 5 is shielded, and the inside of the beam expanding shell 5 and the beam expanding upper cover 6 form a mounting cavity.
As shown in fig. 3, the beam expander is assembled in the following manner: firstly, fixing a first lens 1 at one end of an installation groove of a beam expanding shell 5 by using glue, then enabling a second lens 2 to linearly move along the installation groove (along the direction of an optical axis) to adjust, enabling the spot size of a light emergent hole to reach a target value, and fixing the second lens 2 by using the glue; the fourth lens 4 is fixed at the other end of the installation groove of the beam expanding shell 5 by using glue, the third lens 3 moves linearly along the installation groove (along the optical axis direction) to adjust, the spot size of the light emitting hole reaches the target value, and the third lens 3 is fixed by using glue.
The beam expanding device of the embodiment can be used for shaping Gaussian beams and can also be used for shaping other types of beams.
In one specific embodiment, the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 are sequentially arranged at intervals, the light beam is parallel to the light incident hole, and sequentially passes through the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4, the fast axis is firstly expanded, the slow axis is then expanded, and finally parallel light is formed to exit from the light exit hole.
In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. The utility model provides a beam expanding device, its characterized in that includes the fast axis beam expanding subassembly that expands the fast axis and carries out the slow axis beam expanding subassembly that expands the slow axis, the optical axis of fast axis beam expanding subassembly with the optical axis of slow axis beam expanding subassembly is on same straight line, fast axis beam expanding subassembly with slow axis beam expanding subassembly sets up along the incident direction of light interval in proper order, perhaps slow axis beam expanding subassembly with fast axis beam expanding subassembly sets up along the incident direction of light interval in proper order.
2. The beam expanding device according to claim 1, wherein the fast axis beam expanding assembly comprises a first lens (1) and a second lens (2) which are sequentially arranged at intervals along the incidence direction of light, the first lens (1) is a biconcave cylindrical lens, the second lens (2) is a plano-convex cylindrical lens, and a generatrix of the first lens (1) and a generatrix of the second lens (2) are parallel to each other.
3. The beam expanding device according to claim 2, wherein the first lens (1) comprises a first plano-concave cylindrical mirror (101) and a second plano-concave cylindrical mirror (102) which are fixedly connected, the cylindrical surfaces of the first plano-concave cylindrical mirror (101) and the cylindrical surfaces of the second plano-concave cylindrical mirror (102) are arranged in a back-to-back mode, bus bars of the first plano-concave cylindrical mirror and the second plano-concave cylindrical mirror are parallel to each other, and the refractive index of the first plano-concave cylindrical mirror (101) is smaller than that of the second plano-concave cylindrical mirror (102).
4. A beam expander according to claim 3, wherein the first plano-concave cylindrical mirror (101) is made of H-K9L, the second plano-concave cylindrical mirror (102) is made of ZF6, and the second lens (2) is made of H-K9L.
5. A beam expander as claimed in claim 2, wherein the first lens (1) and the second lens (2) are spaced apart by a distance of 10-20mm.
6. The beam expanding device according to claim 1, wherein the slow-axis beam expanding assembly comprises a third lens (3) and a fourth lens (4) which are sequentially arranged at intervals along the incidence direction of light, the third lens (3) is a plano-convex cylindrical lens, the fourth lens (4) is a plano-concave cylindrical lens, and a generatrix of the third lens (3) is parallel to a generatrix of the fourth lens (4).
7. A beam expander as claimed in claim 6, wherein the refractive index of the third lens (3) is smaller than the refractive index of the fourth lens (4).
8. A beam expander as claimed in claim 7, wherein the material of the third lens (3) is H-K9L and the material of the fourth lens (4) is ZF6.
9. A beam expander as claimed in claim 6, wherein the third lens (3) and the fourth lens (4) are spaced apart by a distance of 10-20mm.
10. A beam expander as claimed in any one of claims 1 to 9, and further comprising a beam expander housing (5) and a beam expander upper cover (6), wherein the beam expander housing (5) and the beam expander upper cover (6) are detachably connected and form a mounting cavity on the inner sides of the beam expander housing (5), the beam expander housing (5) is provided with a mounting groove, the fast axis beam expander assembly and the slow axis beam expander assembly are positioned in the mounting cavity and are both fixed in the mounting groove, and both ends of the beam expander housing (5) are provided with a light inlet hole and a light outlet hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321697624.4U CN219758592U (en) | 2023-06-30 | 2023-06-30 | Beam expanding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321697624.4U CN219758592U (en) | 2023-06-30 | 2023-06-30 | Beam expanding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219758592U true CN219758592U (en) | 2023-09-26 |
Family
ID=88081999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321697624.4U Active CN219758592U (en) | 2023-06-30 | 2023-06-30 | Beam expanding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219758592U (en) |
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2023
- 2023-06-30 CN CN202321697624.4U patent/CN219758592U/en active Active
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