CN116736553A - Optical module and optical shaping system - Google Patents
Optical module and optical shaping system Download PDFInfo
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- CN116736553A CN116736553A CN202310581179.3A CN202310581179A CN116736553A CN 116736553 A CN116736553 A CN 116736553A CN 202310581179 A CN202310581179 A CN 202310581179A CN 116736553 A CN116736553 A CN 116736553A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 150
- 238000007493 shaping process Methods 0.000 title claims abstract description 23
- 230000005499 meniscus Effects 0.000 claims description 46
- 239000013307 optical fiber Substances 0.000 claims description 26
- 238000000265 homogenisation Methods 0.000 claims description 19
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 230000008878 coupling Effects 0.000 claims description 15
- 230000004075 alteration Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
- G02B27/0961—Lens arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0994—Fibers, light pipes
Abstract
An optical module and an optical shaping system relate to the technical field of optics. The optical module comprises a beam expander, a collimating lens and a focusing lens group which are sequentially arranged along the direction of a main optical axis; the light beam is expanded by the beam expander and then enters the collimating lens, and the collimating lens collimates the light beam and then is focused by the focusing lens group and then is emitted. The optical path structure of the optical module has universality and can be compatible with the uniform shaping of the micro lens array group and the uniform shaping of the optical waveguide.
Description
Technical Field
The application relates to the technical field of optics, in particular to an optical module and an optical shaping system.
Background
In the fields of laser processing and reconstruction such as laser scanning, welding, polishing, cutting, marking, surface shaping, laser cladding processing and the like, high-power laser beam output is utilized, and corresponding processing treatment can be carried out on the surface of an object to be processed through optical treatment such as collimation, convergence and the like. The energy of the laser beam output by the current laser is generally Gaussian, the energy of a circular, rectangular or linear light spot formed by directly beating the laser beam to a processing surface after collimation and focusing is Gaussian, the energy of the light spot center is too high, the energy of the light spot periphery is low, and the energy utilization rate, uniformity and process effect are not ideal when the laser beam is processed (such as laser welding, mini-LED repairing and the like).
The improvement commonly used in the prior art is to perform beam homogenization shaping to change the laser energy distribution, and common homogenization methods include optical waveguides, microlens arrays, and the like. However, the existing optical module is difficult to be compatible with two homogenization modes, so that when different homogenization modes are adopted, different optical modules need to be correspondingly designed to be matched with the homogenization modes.
Disclosure of Invention
The application aims to provide an optical module and an optical shaping system, wherein the optical path structure of the optical module has universality and can be compatible with the uniform shaping of a micro lens array group and the uniform shaping of an optical waveguide.
Embodiments of the present application are implemented as follows:
in one aspect of the present application, an optical module is provided, where the optical module includes a beam expander, a collimator, and a focusing lens set sequentially disposed along a main optical axis direction; the light beam is expanded by the beam expander and then enters the collimating lens, and the collimating lens collimates the light beam and then is focused by the focusing lens group and then is emitted. The optical path structure of the optical module has universality and can be compatible with the uniform shaping of the micro lens array group and the uniform shaping of the optical waveguide.
Optionally, the beam expander is a plano-concave lens, and one side of the plane of the plano-concave lens faces the collimating lens, and one side of the concave surface of the plano-concave lens faces away from the collimating lens.
Optionally, the collimating lens is a first plano-convex lens, a plane of the first plano-convex lens faces the beam expander, and a convex surface of the first plano-convex lens faces the focusing lens group.
Optionally, the focusing lens group includes a first meniscus lens and a second meniscus lens which are sequentially arranged, the convex surface of the first meniscus lens faces the collimating lens, and the concave surface of the first meniscus lens faces the convex surface of the second meniscus lens.
Optionally, the optical module further includes a protection window disposed at the light emitting side of the focusing lens assembly, and the light beam emitted from the focusing lens assembly can be emitted through the protection window. The arrangement of the protection window can protect the optical element at the light inlet side of the protection window, so that the service life of the optical module is prolonged.
Optionally, the optical module further includes a first homogenizing group, and the first homogenizing group is disposed on the light incident side of the beam expander.
Optionally, the first homogenizing group includes an optical fiber output light source, a coupling lens group arranged at the light emitting side of the optical fiber output light source, and a polygonal optical waveguide arranged at the light emitting side of the coupling lens group; the light beam emitted by the optical fiber output light source is coupled into the polygonal optical waveguide through the coupling lens group, and the polygonal optical waveguide is used for homogenizing the light beam and then emitting the light beam.
Optionally, the coupling lens group comprises a second plano-convex lens, a third meniscus lens and a fourth meniscus lens which are sequentially arranged; the plane of the second plano-convex lens faces the optical fiber output light source, and the convex surface of the second plano-convex lens faces the convex surface of the third meniscus lens; the concave surface of the third meniscus lens faces the convex surface of the fourth meniscus lens.
Optionally, the optical module further includes a second homogenizing group, and the second homogenizing group is disposed between the collimating lens and the focusing lens group.
Optionally, the second homogenizing group includes a first microlens array group and a second microlens array group which are sequentially arranged, and the first microlens array group is located between the second microlens array group and the collimating lens.
Optionally, the first microlens array group includes a first surface for homogenizing the light beam in the fast axis direction and a second surface for homogenizing the light beam in the slow axis direction, and microstructures of the first surface and the second surface are orthogonally arranged; the second microlens array group includes a third surface for homogenizing the light beam in the fast axis direction and a fourth surface for homogenizing the light beam in the slow axis direction, and microstructures of the third surface and the fourth surface are orthogonally disposed.
In another aspect of the present application, an optical shaping system is provided, which includes the optical module described above.
The beneficial effects of the application include:
the optical module provided by the application comprises a beam expander, a collimating lens and a focusing lens group which are sequentially arranged along the direction of a main optical axis; the light beam is expanded by the beam expander and then enters the collimating lens, and the collimating lens collimates the light beam and then is focused by the focusing lens group and then is emitted. When the optical module provided by the application is adopted, when the optical waveguide is required to be adopted for homogenizing the light beam, the optical waveguide can be arranged on the light inlet side of the beam expander of the optical module, so that the optical waveguide can homogenize and shape the light beam, and after homogenization and plasticity, uniform focusing light spots can be obtained on the receiving surface after the beam expansion of the beam expander, the collimation of the collimation lens and the focusing of the focusing lens group; when the micro lens array is needed to homogenize the light beam, the micro lens array can be arranged between the collimating lens and the focusing lens group, so that the micro lens array can homogenize the light beam expanded by the beam expander, and a uniform focusing light spot is obtained on the receiving surface after focusing by the focusing lens group. Therefore, the optical module provided by the application can be used as a basic optical path structure of an optical waveguide and a basic optical path structure of a micro lens array, so that two homogenization modes can be applied to the optical module, and when a user adopts optical waveguide homogenization or micro lens array homogenization, the structure of the optical module can be applied, and the optical module has higher compatibility.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an optical module according to an embodiment of the present application;
FIG. 2 is a second schematic diagram of an optical module according to an embodiment of the application;
FIG. 3 is a schematic diagram of a first homogenizing group of the optical module provided in FIG. 2;
FIG. 4 is a third schematic diagram of an optical module according to an embodiment of the application;
FIG. 5 is a schematic diagram of the optical module in the fast axis direction of the optical module shown in FIG. 4;
FIG. 6 is a schematic diagram of the optical module in the slow axis direction of the optical module shown in FIG. 4;
FIG. 7 is a schematic diagram of an optical module according to an embodiment of the present application;
fig. 8 is a schematic diagram of an optical module according to an embodiment of the application.
Icon: 10-a beam expander; 20-a collimating mirror; 30-focusing lens group; 31-a first meniscus lens; 32-a second meniscus lens; 40-protecting window; 50-a first homogenization group; 51-an optical fiber output light source; 52-coupling a lens group; 521-a second plano-convex lens; 522-a third meniscus lens; 523-a fourth meniscus lens; 53-polygonal optical waveguide; 60-a second homogenization group; 61-a first microlens array set; 611-a first surface; 612-a second surface; 62-a second microlens array set; 621-a third surface; 622-fourth surface.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; 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 application will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, the present embodiment provides an optical module, which includes a beam expander 10, a collimator 20, and a focusing lens group 30 sequentially disposed along a main optical axis direction; the beam is expanded by the beam expander 10 and then enters the collimator lens 20, and the collimator lens 20 collimates the beam and then focuses the beam by the focusing lens group 30 and then exits. The optical path structure of the optical module has universality and can be compatible with the uniform shaping of the micro lens array group and the uniform shaping of the optical waveguide.
The beam expander 10, the collimator lens 20, and the focusing lens group 30 are sequentially disposed along the direction of the main optical axis, as shown in fig. 1. The beam expander 10 is used for expanding a beam emitted from a light source.
The collimator lens 20 is located at the light emitting side of the beam expander 10, and is used for collimating the beam expanded by the beam expander 10, as shown in fig. 1, so as to obtain a collimated beam.
The focusing lens group 30 is disposed on the light-emitting side of the collimator lens 20, and is configured to focus the collimated light beam collimated by the collimator lens 20, so that a focused light spot can be obtained on the receiving surface.
When the optical waveguide is used to perform the homogenization plasticity on the light beam, the optical waveguide may be disposed on the light incident side of the beam expander 10, so that the light beam homogenized by the optical waveguide can obtain homogenized light spots on the receiving surface under the action of the beam expander 10, the collimator 20 and the focusing lens group 30; when the microlens array is used to homogenize the light beam, the microlens array may be disposed on the light-emitting side of the collimator lens 20 and the light-entering side of the focusing lens group 30, so that the homogenizing and shaping effects on the light beam can be also achieved.
The beam expander 10 is arranged on the light emitting side of the light source, and the corresponding collimating lens 20 is arranged between the focusing lens group 30 and the beam expander 10, so that the optical path structure of the optical module can be matched with the optical waveguide, and the requirement of homogenizing and shaping by adopting the optical waveguide is met; but also can realize the matching with the micro lens array and meet the requirement of adopting the micro lens array for homogenizing and shaping. Therefore, compared with the prior art, for carrying out homogenizing shaping by adopting an optical waveguide, a basic optical path structure suitable for the optical waveguide is required to be designed independently, and for carrying out homogenizing shaping by adopting a micro lens array, the basic optical path structure suitable for the micro lens array is required to be designed independently, the optical module provided by the application can be used as the basic optical path structure for homogenizing the optical waveguide and also can be used as the basic optical path structure of the micro lens array, so that a user only needs to correspondingly replace a homogenizing component according to the requirement, the basic optical path structure does not need to be designed additionally, the production cost and the working efficiency can be greatly reduced, and the optical module has a better application prospect.
In summary, the optical module provided by the present application includes a beam expander 10, a collimator 20, and a focusing lens group 30 sequentially disposed along a main optical axis direction; the beam is expanded by the beam expander 10 and then enters the collimator lens 20, and the collimator lens 20 collimates the beam and then focuses the beam by the focusing lens group 30 and then exits. When the optical module provided by the application is adopted, when the optical waveguide is required to be adopted for homogenizing the light beam, the optical waveguide can be arranged on the light inlet side of the beam expander 10 of the optical module, so that the optical waveguide can homogenize and shape the light beam, and after homogenization and plasticity, uniform focusing light spots can be obtained on a receiving surface after the beam expander of the beam expander 10, the collimation of the collimating lens 20 and the focusing of the focusing lens group 30; when the micro lens array is required to homogenize the light beam, the micro lens array may be disposed between the collimating lens 20 and the focusing lens group 30, so that the micro lens array may homogenize the light beam expanded by the beam expander 10, and then focus the light beam by the focusing lens group 30 to obtain a uniform focused light spot on the receiving surface. Therefore, the optical module provided by the application can be used as a basic optical path structure of an optical waveguide and a basic optical path structure of a micro lens array, so that two homogenization modes can be applied to the optical module, and when a user adopts optical waveguide homogenization or micro lens array homogenization, the structure of the optical module can be applied, and the optical module has higher compatibility.
As shown in fig. 1, alternatively, the beam expander 10 is a plano-concave lens, and the plane side of the plano-concave lens faces the collimator 20, and the concave side of the plano-concave lens faces away from the collimator 20.
In addition, optionally, the collimator lens 20 is a first plano-convex lens, the plane of the first plano-convex lens faces the beam expander 10, and the convex surface of the first plano-convex lens faces the focusing lens group 30.
It should be understood that the types of beam expander 10 and collimator 20 are only examples, and are not limiting, and in other embodiments, those skilled in the art may select other types of optical elements as required for the beam expander 10 and collimator 20, so long as the beam expander and collimator functions.
Meanwhile, it should be noted that, in the present application, a plano-concave lens is selected as the beam expander 10, and a first plano-convex lens is adopted as the collimator 20, so that the plano-convex lens is adopted as the positive lens, the plano-concave lens is adopted as the negative lens, and the spherical aberration of the plano-concave lens are respectively the negative spherical aberration and the positive spherical aberration, so that the positive spherical aberration and the negative spherical aberration of the optical module are at least partially offset, and the spherical aberration and the benefit difference can be partially eliminated.
As shown in fig. 1, in the present embodiment, the focusing lens group 30 includes a first meniscus lens 31 and a second meniscus lens 32, which are disposed in this order, the convex surface of the first meniscus lens 31 faces the collimator lens 20, and the concave surface of the first meniscus lens 31 faces the convex surface of the second meniscus lens 32.
I.e. the convex surfaces of the first and second meniscus lenses 31, 32 are both facing the collimator lens 20, while the concave surfaces of the first and second meniscus lenses 31, 32 are both facing away from the collimator lens 20.
The application sets the focusing lens group 30 as two meniscus lenses, sets the beam expander 10 as a plano-concave lens and sets the collimating lens 20 as a plano-convex lens, thus, the spherical aberration and the benefit difference can be corrected by mutually matching a plurality of lenses and correspondingly adjusting the respective curvatures, the spherical aberration and the benefit difference of the optical module are reduced to lower values, and the uniform light spots with high focusing and almost no dispersion are obtained on the receiving surface.
In order to protect each optical element of the optical module, thereby improving the service life of the optical module, in this embodiment, optionally, the optical module further includes a protection window 40 disposed on the light emitting side of the focusing lens assembly 30, and the light beam emitted from the focusing lens assembly 30 can be emitted through the protection window 40.
The protective window 40 may be a light-transmitting glass. In particular, the specific material of the protection window 40 is not particularly limited in the present application, and a person skilled in the art can select a suitable material according to his/her needs.
To increase the light transmittance of the protection window 40, a light-transmitting film may be coated on the protection window 40. The light transmittance of the light-transmitting film can be selected by a person skilled in the art according to practical conditions, and the application is not limited.
In this embodiment, the optical module may be used in combination with different homogenizing elements, and the first homogenizing element 50 and the second homogenizing element 60 are exemplified below.
In the first case, referring to fig. 2 and 3 in combination, the optical module optionally further includes a first homogenizing group 50, where the first homogenizing group 50 is disposed on the light incident side of the beam expander 10.
In this embodiment, the first homogenizing group 50 includes an optical fiber output light source 51, a coupling lens group 52 disposed on the light emitting side of the optical fiber output light source 51, and a polygonal optical waveguide 53 disposed on the light emitting side of the coupling lens group 52; the light beam emitted from the optical fiber output light source 51 is coupled into the polygonal optical waveguide 53 through the coupling lens group 52, and the polygonal optical waveguide 53 homogenizes the light beam and emits the homogenized light beam.
The shape of the optical fiber output light source 51 is not limited to the present application, and may be any shape, such as a circular shape or a square shape.
The coupling lens group 52 is located at the light emitting side of the optical fiber output light source 51, and is used for coupling the light beam emitted from the optical fiber output light source 51 into the polygonal optical waveguide 53. The polygonal optical waveguide 53 is used for homogenizing the light beam entering therein.
Illustratively, the shape and size of the polygonal optical waveguide 53 may be set by one skilled in the art, and the present application is not limited thereto. For example, the polygonal optical waveguide 53 may have a quadrangular shape.
In addition, in this embodiment, the polygonal optical fiber may include a plurality of polygonal optical fibers, and the specifications of the plurality of polygonal optical fibers are different, so that a user may select a polygonal optical fiber with a suitable specification according to the size and shape of the light spot.
The specification may be a shape, a size, or a shape and a size.
The application can realize the conversion from the light source (namely the optical fiber output light source 51) outputting the light beam with any shape to the polygonal light spot through the combination of the optical fiber output light source 51, the coupling lens group 52, the polygonal optical waveguide 53, the beam expander 10, the collimating lens 20 and the focusing lens group 30; low spherical aberration and low-cost high-focus spot output, and low coherence and decoherence characteristics can also be realized.
Referring to fig. 3, optionally, the coupling lens group 52 includes a second plano-convex lens 521, a third meniscus lens 522, and a fourth meniscus lens 523, which are sequentially disposed; the plane of the second plano-convex lens 521 faces the optical fiber output light source 51, and the convex surface of the second plano-convex lens 521 faces the convex surface of the third meniscus lens 522; the concave surface of the third meniscus lens 522 faces the convex surface of the fourth meniscus lens 523.
The second plano-convex lens 521 is located between the optical fiber output light source 51 and the third meniscus lens 522, and the plane of the second plano-convex lens 521 faces the optical fiber output light source 51 and the convex surface faces the third meniscus lens 522; the convex surface of the third meniscus lens 522 faces the second plano-convex lens 521, and the concave surface faces the fourth meniscus lens 523; the convex surface of the fourth meniscus lens 523 faces the third meniscus lens 522, and the concave surface faces away from the third meniscus lens 522.
The second plano-convex lens 521 is used for collimating the light beam emitted from the optical fiber output light source 51, and the third meniscus lens 522 and the fourth meniscus lens 523 are used for focusing the light beam collimated by the second plano-convex lens 521 so that the focused light beam is coupled into the polygonal optical waveguide 53.
The polygonal optical waveguide 53 may be a polygonal optical fiber.
In the second case, referring to fig. 4 to 8, the optical module further includes a second homogenizing group 60, and the second homogenizing group 60 is disposed between the collimating lens 20 and the focusing lens group 30.
Illustratively, the second homogenizing group 60 includes a first microlens array group 61 and a second microlens array group 62 disposed in sequence, the first microlens array group 61 being located between the second microlens array group 62 and the collimator lens 20.
The first microlens array group 61 and the second microlens array group 62 are used for homogenizing the light beam collimated by the auto-collimator lens 20.
Alternatively, as shown in fig. 5 and 6 (or fig. 7 and 8), the first microlens array set 61 includes a first surface 611 for homogenizing a light beam in a fast axis direction and a second surface 612 for homogenizing a light beam in a slow axis direction, and microstructures of the first surface 611 and the second surface 612 are disposed orthogonally; the second microlens array set 62 includes a third surface 621 for homogenizing the light beam in the fast axis direction and a fourth surface 622 for homogenizing the light beam in the slow axis direction, and microstructures of the third surface 621 and the fourth surface 622 are disposed orthogonally.
In this way, the first surface 611 and the second surface 612 may achieve homogenization for the fast axis and the slow axis, respectively, and correspondingly, the third surface 621 and the fourth surface 622 may also achieve homogenization for the fast axis and the slow axis, respectively. The present application is not limited to the arrangement positions of the first surface 611 and the second surface 612, and the first surface 611 may be between the second surface 612 and the collimator lens 20, or the second surface 612 may be between the first surface 611 and the collimator lens 20. Likewise, the placement of the third surface 621 and the fourth surface 622 is not limiting in this application.
Illustratively, the first surface 611 may be used to homogenize the fast axis and the second surface 612 is used to homogenize the slow axis.
Also, the first surface 611 and the second surface 612 may belong to different optical elements, i.e. two optical elements are used, one having the first surface 611 and the other having the second surface 612, as shown in fig. 5 and 6. Alternatively, the first surface 611 and the second surface 612 belong to the same optical element, i.e., the first surface 611 and the second surface 612 belong to opposite surfaces of one optical element, as shown in fig. 7 and 8. In particular, the skilled person can select an appropriate manner as required, and the present application is not limited.
Similarly, the third surface 621 and the fourth surface 622 may be separated into different optical elements, i.e., two optical elements are used, one having the third surface 621 and the other having the fourth surface 622, as shown in fig. 5 and 6. Alternatively, the third surface 621 and the fourth surface 622 belong to the same optical element, i.e., the third surface 621 and the fourth surface 622 belong to opposite surfaces of one optical element, as shown in fig. 7 and 8.
In addition, when the first surface 611 and the second surface 612 belong to different optical elements, the first surface 611 and the second surface 612 may be disposed opposite or opposite to each other, and may even be disposed in the same direction (i.e., both the first surface 611 and the second surface 612 face the light source or both face away from the light source).
In another aspect of the present application, an optical shaping system is provided, which includes the optical module described above. The specific structure and the beneficial effects of the optical module are described and illustrated in detail in the foregoing, so that the disclosure is not repeated.
The above is only an alternative embodiment of the present application, and is not intended to limit the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Claims (11)
1. An optical module is characterized by comprising a beam expander, a collimating lens and a focusing lens group which are sequentially arranged along the direction of a main optical axis;
the light beam is incident to the collimating lens after being expanded by the beam expander, and the light beam is collimated by the collimating lens and then focused by the focusing lens group and then emitted.
2. The optical module of claim 1, wherein the beam expander is a plano-concave lens, and wherein a planar side of the plano-concave lens faces the collimating lens, and a concave side of the plano-concave lens faces away from the collimating lens.
3. The optical module according to claim 1 or 2, wherein the collimating lens is a first plano-convex lens, a plane of the first plano-convex lens faces the beam expander, and a convex surface of the first plano-convex lens faces the focusing lens group.
4. The optical module of claim 1, wherein the focusing lens group comprises a first meniscus lens and a second meniscus lens which are sequentially arranged, the convex surface of the first meniscus lens faces the collimating lens, and the concave surface of the first meniscus lens faces the convex surface of the second meniscus lens.
5. The optical module of claim 1, further comprising a first homogenizing group disposed on an incident side of the beam expander.
6. The optical module of claim 5, wherein the first homogenizing group comprises an optical fiber output light source, a coupling lens group arranged on the light emitting side of the optical fiber output light source, and a polygonal optical waveguide arranged on the light emitting side of the coupling lens group; and the light beam emitted by the optical fiber output light source is coupled into the polygonal optical waveguide through the coupling lens group, and the polygonal optical waveguide is used for homogenizing the light beam and then emitting the homogenized light beam.
7. The optical module of claim 6, wherein the coupling lens group comprises a second plano-convex lens, a third meniscus lens, and a fourth meniscus lens, all disposed in sequence; the plane of the second plano-convex lens faces the optical fiber output light source, and the convex surface of the second plano-convex lens faces the convex surface of the third meniscus lens; the concave surface of the third meniscus lens faces the convex surface of the fourth meniscus lens.
8. The optical module of claim 1, further comprising a second homogenization group disposed between the collimating lens and the focusing lens group.
9. The optical module of claim 8, wherein the second homogenizing group comprises a first microlens array group and a second microlens array group disposed in sequence, the first microlens array group being located between the second microlens array group and the collimator lens.
10. The optical module of claim 9, wherein the first microlens array set includes a first surface for homogenizing the light beam in the fast axis direction and a second surface for homogenizing the light beam in the slow axis direction, microstructures of the first surface and the second surface being disposed orthogonally; the second microlens array group comprises a third surface for homogenizing light beams in the fast axis direction and a fourth surface for homogenizing light beams in the slow axis direction, and microstructures of the third surface and the fourth surface are orthogonally arranged.
11. An optical shaping system comprising an optical module according to any one of claims 1 to 10.
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| CN202310581179.3A CN116736553A (en) | 2023-05-22 | 2023-05-22 | Optical module and optical shaping system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075356A (en) * | 2023-10-17 | 2023-11-17 | 深圳市镭硕光电科技有限公司 | Laser lighting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075356A (en) * | 2023-10-17 | 2023-11-17 | 深圳市镭硕光电科技有限公司 | Laser lighting device |
| CN117075356B (en) * | 2023-10-17 | 2024-02-06 | 深圳市镭硕光电科技有限公司 | Laser lighting device |
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