CN118567115A - Beam shaping assembly and laser device - Google Patents
Beam shaping assembly and laser device Download PDFInfo
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- CN118567115A CN118567115A CN202410793596.9A CN202410793596A CN118567115A CN 118567115 A CN118567115 A CN 118567115A CN 202410793596 A CN202410793596 A CN 202410793596A CN 118567115 A CN118567115 A CN 118567115A
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- 238000007493 shaping process Methods 0.000 title claims abstract description 74
- 230000003287 optical effect Effects 0.000 claims abstract description 31
- 241001270131 Agaricus moelleri Species 0.000 claims abstract description 30
- 238000000265 homogenisation Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
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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
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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
-
- 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
- G02B27/30—Collimators
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Abstract
The application discloses a beam shaping component and a laser device, which relate to the technical field of laser, the beam shaping component of the application comprises a first aspheric lens, a spherical lens and a second aspheric lens which are sequentially arranged along the optical axis direction, the Gaussian beam is converged and homogenized by the first aspheric lens, diverged by the spherical lens, and finally collimated and homogenized by the second aspheric lens to form a flat-top beam. The beam shaping component and the laser device provided by the application can realize collimation and homogenization of high-power laser within a preset working distance.
Description
Technical Field
The application relates to the technical field of lasers, in particular to a beam shaping assembly and a laser device.
Background
In laser impact processing, laser cleaning, laser holography, laser medical treatment, laser ranging, radar and other applications, it is desirable that the action beam is a flat-top beam with uniformly distributed light intensity in the cross section, so as to avoid uneven laser processing and local damage caused by too concentrated energy in the middle area of the beam, however, most of the beams emitted by the laser are Gaussian beams with non-uniformly distributed light intensity. The main means for converting Gaussian beams into flat-top beams is by means of a set of shaping systems, wherein the shaping systems mainly comprise an anti-Gaussian distribution absorption optical filter shaping system, a double-refractive index lens group shaping system, a micro-lens array shaping system, a diffraction optical element shaping system, a liquid crystal spatial light modulator shaping system, a holographic filter shaping system, an amplitude modulation grating shaping system and an aspheric lens group shaping system.
The double refraction diffraction element adopts a diffraction adjustment mode to realize the homogenization and shaping of Gaussian beams, but the collimation of flat top light can not be realized within a certain working distance due to the limited working distance; the micro lens array is formed by combining a plurality of tiny transparent micro lenses with the same curvature radius, and is not suitable for being applied to the field of high-power laser; the aspherical mirror group can realize flat-top light collimation output in a longer working distance, and the current aspherical shaping mirror group has two types of Galileo type and Kepler type, wherein the aspherical surface of the Galileo type structure is difficult to process, so that the production cost is high, and the large-scale application of the flat-top mirror group is limited. The kepler structure is provided with a real focusing point in the middle, when the incident laser power is too high, air near the focusing point is ionized to form a refractive index gradient, and the kepler structure is not suitable for the application field of high-power laser.
Disclosure of Invention
The application aims to provide a beam shaping component and a laser device, which can realize collimation and homogenization of high-power laser within a preset working distance.
In one aspect, an embodiment of the present application provides a beam shaping assembly, including a first aspheric lens, a spherical lens, and a second aspheric lens sequentially disposed along an optical axis, where a gaussian beam is converged and homogenized by the first aspheric lens, diverged by the spherical lens, and collimated and homogenized by the second aspheric lens to form a flat-top beam.
As an embodiment, a side of the first aspheric surface far from the spherical lens is set to be a plane, a side of the first aspheric surface near to the spherical lens is set to be a first aspheric surface, and the first aspheric surface is a cambered surface.
As an embodiment, a side of the second aspherical lens away from the spherical lens is provided as a plane, a side of the second aspherical lens close to the spherical lens is provided as a second aspherical surface, and the second aspherical surface is a cambered surface.
As an embodiment, the sagittal height of the first aspheric surface and the second aspheric surface in the optical axis direction satisfies the relation:
Wherein z is the sagittal height of the optical axis, c is the inverse of the radius of curvature, k is the conic coefficient, r is the radial coordinate of the coordinate axis, and a 1、a2、a3、a4、a5、a6、a7、a8 is the higher order coefficient.
As an embodiment, the radius of curvature of the first aspheric surface is between (-36 mm) - (-37.5 mm), and the radius of curvature of the second aspheric surface is between 34.5mm-35.5 mm.
As an embodiment, the spherical lens includes a first spherical surface and a second spherical surface disposed in order in the optical axis direction, the first spherical surface having a radius of (-3.8 mm) - (-4.0 mm), and the second spherical surface having a radius of 3.8mm-4.0 mm.
As an embodiment, the first aspheric lens has a central thickness of between 4.5 and 5.5mm, the spherical lens has a central thickness of between 2.5 and 3.5mm, and the second aspheric lens has a central thickness of between 4.5 and 5.5 mm.
As an embodiment, the distance between the first aspherical lens and the spherical lens in the optical axis direction is between 71.7mm and 72.7mm, and the distance between the spherical lens and the second aspherical lens in the optical axis direction is between 69mm and 70 mm.
As an embodiment, the working distance of the beam shaping assembly is 250mm.
Another aspect of the embodiments of the present application provides a laser device, which includes a laser emitting laser and the beam shaping component disposed on an emitting side of the laser, where a gaussian beam emitted from the laser is shaped by the beam shaping component to form a flat-top beam.
The beneficial effects of the embodiment of the application include:
The application provides a beam shaping component, which comprises a first aspheric lens, a spherical lens and a second aspheric lens which are sequentially arranged along the direction of an optical axis, wherein a Gaussian beam is converged and homogenized through the first aspheric lens, diverged through the spherical lens, and finally collimated and homogenized through the second aspheric lens to form a flat-top beam, so that the change of the laser beam from the Gaussian beam to the flat-top beam is realized; in addition, the outgoing light beam is a collimated light beam through the collimation of the second aspheric lens, so that the outgoing flat-top light beam keeps higher consistency within a preset working distance, and the light beam shaping assembly has a longer working distance; furthermore, the beam shaping component of the embodiment of the application adopts the first aspheric lens to converge, adopts the spherical lens to diverge, and finally adopts the second aspheric lens to collimate, so that the minimum position of the light spot in the light path is positioned at the light emitting side of the spherical lens, and no real focusing point exists, therefore, the beam shaping component can be applied to high-power laser. Therefore, the beam shaping assembly provided by the embodiment of the application can realize collimation and homogenization of high-power laser within a preset working distance.
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 structural diagram of a beam shaping component according to an embodiment of the present application;
Fig. 2 is a light path diagram of a beam shaping component according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of an input beam provided by an embodiment of the present application;
FIG. 4 is a two-dimensional energy distribution diagram of a beam shaping assembly of an embodiment of the present application outputting a flat-top beam at a working distance of 50 mm;
FIG. 5 is a cross-sectional view of a beam shaping assembly of an embodiment of the present application outputting a flat-top beam at a working distance of 250 mm;
FIG. 6 is a two-dimensional energy distribution diagram of a beam shaping assembly of an embodiment of the present application outputting a flat-top beam at a working distance of 250 mm;
FIG. 7 is a sagittal view of a first aspheric lens according to an embodiment of the present application;
fig. 8 is a sagittal view of a second aspheric lens according to an embodiment of the present application.
Icon: 100-a beam shaping component; 110-a first aspheric lens; 111-a first aspheric surface; 120-spherical lens; 121-a first sphere; 122-a second sphere; 130-a second aspheric lens; 131-a second aspheric 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.
The embodiment of the present application provides a beam shaping assembly 100, as shown in fig. 1 and 2, including a first aspheric lens 110, a spherical lens 120 and a second aspheric lens 130 sequentially arranged along the optical axis direction, wherein a gaussian beam is converged and homogenized by the first aspheric lens 110, diverged by the spherical lens 120, and collimated and homogenized by the second aspheric lens 130 to form a flat-top beam.
The beam shaping component 100 provided by the embodiment of the application is used for shaping and collimating the Gaussian beam emitted by the laser to form a flat-top beam so as to better utilize the laser beam. Specifically, the beam shaping assembly 100 provided in the embodiment of the present application includes a first aspheric lens 110, a spherical lens 120, and a second aspheric lens 130 sequentially disposed along the optical axis direction. The gaussian beam is incident to the beam shaping assembly 100 by the first aspheric lens 110, the first aspheric lens 110 can converge and homogenize the beam due to the aspheric refractive surface, the beam converged and homogenized by the first aspheric lens 110 is incident to the spherical lens 120, the spherical lens 120 diverges the beam and then enters the second aspheric lens 130, the second aspheric lens 130 collimates and homogenizes the beam and then emits the beam, and the gaussian beam is homogenized into a flat-top beam due to the homogenization of the first aspheric lens 110 and the second aspheric lens 130, and the emitted beam is a collimated beam due to the collimation of the second aspheric lens 130, so that the emitted flat-top beam maintains higher consistency within a preset working distance. Therefore, in the beam shaping module 100 according to the embodiment of the present application, the outgoing beam is a quasi-straight flat-top beam.
In addition, in the beam shaping assembly 100 according to the embodiment of the present application, the first aspheric lens 110 is adopted to converge, the spherical lens 120 is adopted to diverge, and the second aspheric lens 130 is adopted to collimate, so that the light spot minimum position in the light path is located at the light emitting side of the spherical lens 120, and no real focusing point exists, therefore, the beam shaping assembly can be applied to high-power laser.
Based on the above description, the beam shaping assembly 100 provided in the embodiment of the present application can achieve collimation and homogenization of high-power laser within a preset working distance.
In order to verify the beneficial effects of the embodiments of the present application, the incident beam and the outgoing beam of the beam shaping assembly 100 are measured, so as to obtain the cross-sectional view of the incident beam as shown in fig. 3 to 6, specifically, fig. 3 is a cross-sectional view of the incident beam; as can be seen from fig. 3, the incident beam is gaussian, the intensity is greatest at the center of the beam and the intensity at the edges of the beam is smaller, so that the light energy is concentrated at the center of the beam. After the beam shaping assembly 100 of the present application shapes the optical fiber beam, as shown in fig. 5, fig. 5 is a cross-sectional view of a flat-top beam at a working distance of 250mm, and as can be seen from fig. 5, the light intensity of the beam is not greatly different and has a relatively flat top within a predetermined range. Therefore, the beam shaping assembly 100 provided by the embodiment of the present application can shape the gaussian beam into the flat-top beam. In addition, fig. 4 and 6 are two-dimensional energy distribution diagrams of the beam shaping assembly 100 at 50mm light and 250mm working distance, respectively, and it can be seen from fig. 4 and 6 that the energy distribution of the light beam is relatively uniform within a predetermined working distance range.
In particular, the specific materials of the first aspheric lens 110, the spherical lens 120, and the second aspheric lens 130 are not limited in the embodiments of the present application, as long as they have a refractive index difference with air and can transmit light, and examples thereof include fused silica, calcium fluoride, or other light-transmitting materials.
The beam shaping assembly 100 provided by the application comprises a first aspheric lens 110, a spherical lens 120 and a second aspheric lens 130 which are sequentially arranged along the optical axis direction, wherein a Gaussian beam is converged and homogenized through the first aspheric lens 110, diverged through the spherical lens 120, and finally collimated and homogenized through the second aspheric lens 130 to form a flat-top beam, so that the laser beam is changed from the Gaussian beam to the flat-top beam; in addition, the outgoing beam is collimated by the second aspheric lens 130, so that the outgoing flat-top beam maintains higher consistency within a preset working distance, and the beam shaping assembly 100 has a longer working distance; further, the beam shaping assembly 100 according to the embodiment of the present application adopts the first aspheric lens 110 to converge, adopts the spherical lens 120 to diverge, and finally adopts the second aspheric lens 130 to collimate, so that the minimum position of the light spot in the light path is located at the light emitting side of the spherical lens 120, and no real focusing point exists, therefore, the beam shaping assembly can be applied to high-power laser. Therefore, the beam shaping assembly 100 provided by the embodiment of the application can realize collimation and homogenization of high-power laser within a preset working distance.
Alternatively, a side of the first aspherical surface 111 away from the spherical lens 120 is provided as a plane, a side of the first aspherical surface 111 close to the spherical lens 120 is provided as the first aspherical surface 111, and the first aspherical surface 111 is a cambered surface.
The first aspheric lens 110 is set to be a plane on one side and a first aspheric lens 111 on the other side, so that the first aspheric lens 110 has an aspheric cambered surface, the plane is well processed, and the first aspheric lens 111 realizes the convergence and homogenization of light beams, thereby simplifying the preparation process of the first aspheric lens 110.
In addition, in the embodiment of the present application, the first aspheric lens 110 is used to converge the light beam, and then the spherical lens 120 is used to diverge the light beam, so that the radius of curvature of the first aspheric lens 111 can be reduced, the surface of the first aspheric lens 111 is smoother, and the preparation process of the first aspheric lens 110 is further simplified.
In one implementation manner of the embodiment of the present application, a side of the second aspheric lens 130 away from the spherical lens 120 is configured as a plane, a side of the second aspheric lens 130 close to the spherical lens 120 is configured as a second aspheric lens 131, and the second aspheric lens 131 is a cambered surface.
The second aspheric lens 130 is set to be a plane on one side and a second aspheric lens 131 on the other side, so that the second aspheric lens 130 has an aspheric cambered surface, the plane is well processed, and the first aspheric lens 111 realizes the convergence and homogenization of the light beam, thereby simplifying the preparation process of the first aspheric lens 110.
Optionally, the sagittal height of the first aspheric surface 111 and the second aspheric surface 131 along the optical axis direction satisfies the relation:
Wherein z is the sagittal height of the optical axis, c is the inverse of the radius of curvature, k is the conic coefficient, r is the radial coordinate of the coordinate axis, and a 1、a2、a3、a4、a5、a6、a7、a8 is the higher order coefficient.
In the above-described relational expression, a point where the center of the optical axis passes through the first aspherical surface 111 or the second aspherical surface 131 is taken as an origin, and a distance between any point on the first aspherical surface 111 and the second aspherical surface 131 and the origin is r. When the curvature radius and the conical coefficient are fixed values, the rise and the r have a preset relation, so that the rise changes along with the change of the r.
The sagittal variation of the first aspheric surface 111 and the second aspheric surface 131 is uniform, the surface is smooth, and the processing is facilitated.
Specifically, the embodiment of the present application is not limited to the specific case, and those skilled in the art may set the high-order term coefficients according to actual situations, and examples are shown in table one.
The high order coefficients of the first aspheric surface 111 and the second aspheric surface 131 are shown
The sagittal height diagram of the first aspheric surface 111 formed by the high-order term coefficients in table one is shown in fig. 7, and the sagittal height change of the first aspheric surface 111 is relatively uniform and relatively convenient to process, and can be suitable for mass production as shown in fig. 7. Similarly, the sagittal height of the second aspheric surface 131 formed by the high-order coefficients in table one is shown in fig. 8, and as can be seen from fig. 8, the sagittal height of the second aspheric surface 131 is relatively uniform, and the processing is relatively convenient, so that the method is suitable for mass production.
In one implementation of the embodiment of the present application, as shown in fig. 1 and 2, the radius of curvature of the first aspheric surface 111 is between (-36 mm) - (-37.5 mm), and the radius of curvature of the second aspheric surface 131 is between 34.5mm and 35.5 mm.
The radius of curvature of the first aspheric surface 111 can be reduced as much as possible on the basis of achieving convergence and homogenization, thereby reducing the difficulty in manufacturing the first aspheric surface 111. Similarly, the radius of curvature is reduced as much as possible, thereby reducing the difficulty in preparing the second aspherical surface 131.
Specifically, the curvature radius of the first aspheric surface 111 is not limited in the embodiment of the present application, and may be, for example, -36mm, -36.5mm, -36.9mm, -37.5mm, and those skilled in the art may set according to practical situations. The radius of curvature of the second aspherical surface 131 may be 34.5mm, 35mm, 35.5mm, for example.
Alternatively, the spherical lens 120 includes a first spherical surface 121 and a second spherical surface 122 sequentially disposed in the optical axis direction, the radius of the first spherical surface 121 being between (-3.8 mm) - (-4.0 mm), and the radius of the second spherical surface 122 being between 3.8mm-4.0 mm.
By way of example, the radius of the first sphere 121 may be-3.8 mm, -3.98mm, -4.0mm; the radius of the second sphere 122 may be 3.8mm, 3.98mm, 4.0mm. The first and second spherical surfaces 121 and 122 are symmetrical about the center line of the spherical lens 120, facilitate processing, and facilitate divergence of the light beam.
In one implementation of the embodiment of the present application, the center thickness of the first aspheric lens 110 is between 4.5mm and 5.5mm, the center thickness of the spherical lens 120 is between 2.5mm and 3.5mm, and the center thickness of the second aspheric lens 130 is between 4.5mm and 5.5 mm.
Wherein the center thickness refers to a distance travelled by the center of the optical axis in the lens, and specifically, the center thickness of the first aspherical lens 110 refers to a distance travelled by the center of the optical axis in the first aspherical lens 110; the center thickness of the spherical lens 120 refers to the distance travelled by the center of the optical axis in the spherical lens 120; the center thickness of the second aspherical lens 130 refers to the distance travelled by the center of the optical axis in the second aspherical lens 130.
Specifically, the center thickness of the first aspherical lens 110 may be 4.5mm, 5mm, 5.5mm; the center thickness of the spherical lens 120 may be 2.5mm, 3mm, 3.5mm.
Alternatively, the distance between the first aspherical lens 110 and the spherical lens 120 in the optical axis direction is between 71.7mm and 72.7mm, and the distance between the spherical lens 120 and the second aspherical lens 130 in the optical axis direction is between 69mm and 70 mm.
The distance between the individual lenses affects the volume occupied by the beam shaping assembly 100, and therefore, the distance between the individual lenses should be as small as possible without affecting the beam shaping by the beam shaping assembly 100. Specifically, the distance between the first aspheric lens 110 and the spherical lens 120 along the optical axis direction may be 71.7mm, 72.1mm, 72.7mm; the distance of the spherical lens 120 in the optical axis direction from the second aspherical lens 130 may be 69mm, 69.5mm, 70mm.
In one possible implementation of an embodiment of the present application, the working distance of the beam shaping assembly 100 is 250mm.
In the embodiment of the application, the first aspheric lens 110 is adopted to converge and homogenize the light beam, then the light beam is diverged by the spherical lens 120, and finally the light beam is collimated and homogenized by the second aspheric lens 130, so that the light beam is a collimated flat-top light beam, and the light beam has higher consistency in a longer working distance, so that the light beam shaping assembly 100 has a longer working distance, and when the working distance of the light beam shaping assembly 100 is 250mm, the two-dimensional energy distribution diagram of the light beam is more uniform, and the flat-top light beam is formed.
The embodiment of the application also discloses a laser device which comprises a laser for emitting laser and the beam shaping assembly 100 arranged on the light emitting side of the laser, wherein Gaussian beams emitted by the laser form flat-top beams after being shaped by the beam shaping assembly 100. The laser device includes the same structure and advantages as the beam shaping assembly 100 of the previous embodiment. The structure and the advantages of the beam shaping assembly 100 are described in detail in the foregoing embodiments, and are not described herein.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by 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.
Claims (10)
1. The beam shaping assembly is characterized by comprising a first aspheric lens, a spherical lens and a second aspheric lens which are sequentially arranged along the optical axis direction, wherein Gaussian beams are converged and homogenized through the first aspheric lens, diverged through the spherical lens and finally collimated and homogenized through the second aspheric lens to form flat-top beams.
2. The beam shaping assembly according to claim 1, wherein a side of the first aspheric surface remote from the spherical lens is provided as a plane, a side of the first aspheric surface near the spherical lens is provided as a first aspheric surface, and the first aspheric surface is a cambered surface.
3. The beam shaping assembly according to claim 2, wherein a side of the second aspherical lens remote from the spherical lens is provided as a plane, and a side of the second aspherical lens close to the spherical lens is provided as a second aspherical surface, the second aspherical surface being a cambered surface.
4. A beam shaping assembly according to claim 3, wherein the sagittal height of the first and second aspheres in the optical axis direction satisfies the relationship:
Wherein z is the sagittal height of the optical axis, c is the inverse of the radius of curvature, k is the conic coefficient, r is the radial coordinate of the coordinate axis, and a 1、a2、a3、a4、a5、a6、a7、a8 is the higher order coefficient.
5. A beam shaping assembly according to claim 3, wherein the radius of curvature of the first aspheric surface is between (-36 mm) - (-37.5 mm) and the radius of curvature of the second aspheric surface is between 34.5mm-35.5 mm.
6. The beam shaping assembly according to claim 1, wherein the spherical lens comprises a first spherical surface and a second spherical surface arranged in sequence in the direction of the optical axis, the first spherical surface having a radius between (-3.8 mm) - (-4.0 mm), and the second spherical surface having a radius between 3.8mm-4.0 mm.
7. The beam shaping assembly according to claim 1, wherein the first aspheric lens has a central thickness of between 4.5 and 5.5mm, the spherical lens has a central thickness of between 2.5 and 3.5mm, and the second aspheric lens has a central thickness of between 4.5 and 5.5 mm.
8. The beam shaping assembly according to claim 7, wherein the first aspheric lens is between 71.7mm-72.7mm from the spherical lens in the direction of the optical axis, and the spherical lens is between 69mm-70mm from the second aspheric lens in the direction of the optical axis.
9. The beam shaping assembly according to claim 8, wherein the working distance of the beam shaping assembly is 250mm.
10. A laser device, comprising a laser emitting laser and a beam shaping assembly according to any one of claims 1 to 9 disposed on an emitting side of the laser, wherein a gaussian beam emitted from the laser is shaped by the beam shaping assembly to form a flat-top beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410793596.9A CN118567115A (en) | 2024-06-19 | 2024-06-19 | Beam shaping assembly and laser device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410793596.9A CN118567115A (en) | 2024-06-19 | 2024-06-19 | Beam shaping assembly and laser device |
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| CN118567115A true CN118567115A (en) | 2024-08-30 |
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| CN202410793596.9A Pending CN118567115A (en) | 2024-06-19 | 2024-06-19 | Beam shaping assembly and laser device |
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