CN116265998A - Optical lens, optical lens array, optical shaping device and laser system - Google Patents
Optical lens, optical lens array, optical shaping device and laser system Download PDFInfo
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- CN116265998A CN116265998A CN202111549002.2A CN202111549002A CN116265998A CN 116265998 A CN116265998 A CN 116265998A CN 202111549002 A CN202111549002 A CN 202111549002A CN 116265998 A CN116265998 A CN 116265998A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 280
- 238000007493 shaping process Methods 0.000 title claims abstract description 78
- 239000004065 semiconductor Substances 0.000 claims description 21
- 238000003491 array Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 7
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 6
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound 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
- G02B27/0916—Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers
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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
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/005—Arrays characterized by the distribution or form of lenses arranged along a single direction only, e.g. lenticular sheets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0057—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for temporal shaping, e.g. pulse compression, frequency chirping
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- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Semiconductor Lasers (AREA)
Abstract
An optical lens, an optical lens array, an optical shaping device and a laser system relate to the technical field of optics. The optical lens includes an entrance face configured to fast-axis collimate a light beam incident to the optical lens and an exit face configured to slow-axis collimate a light beam incident to the optical lens. The optical lens provided by the invention is applied to the optical shaping device and the laser system, can greatly reduce the volume of the optical shaping device and the laser system, has a compact structure, reduces the number of lenses in the optical shaping device and the laser system, and improves the assembly efficiency. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Description
Technical Field
The invention relates to the technical field of optics, in particular to an optical lens, an optical lens array, an optical shaping device and a laser system.
Background
The high-power semiconductor laser is one of the most important devices in the current industrial laser field, and can be used for pumping, illumination, a high-power semiconductor direct processing system, a laser radar, optical communication application and the like. In the conventional semiconductor laser light source, it is generally necessary to use a fast axis collimator lens and a slow axis collimator lens for each light emitting point to achieve collimation in the fast axis and slow axis directions. With the increase of power requirements of applications on semiconductor laser products, the more light emitting points are needed, the more lenses are needed, so that the lower the assembly efficiency is, the larger the product volume is.
Disclosure of Invention
The invention aims to provide an optical lens, an optical lens array, an optical shaping device and a laser system. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Embodiments of the present invention are implemented as follows:
in one aspect of the invention, an optical lens is provided that includes an entrance face configured to fast-axis collimate a light beam incident to the optical lens and an exit face configured to slow-axis collimate a light beam incident to the optical lens.
Optionally, the incident surface is configured as a curved surface along a first direction, and the exit surface is configured as a curved surface along a second direction, where the first direction and the second direction are orthogonal to each other.
In one aspect of the present invention, an optical lens array is provided, where the optical lens array is configured to include at least two integrally formed one-dimensional arrays or two-dimensional arrays of optical lenses, and an incident plane and an exit plane of each of the optical lenses are aligned respectively.
In one aspect of the present invention, an optical shaping device is provided, where the optical shaping device includes a single-point laser light source and an optical lens as set forth in claim 1 or 2 disposed in an outgoing direction of the single-point laser light source, the single-point laser light source is configured to emit a laser beam, and the optical lens is configured to perform fast axis collimation and slow axis pre-collimation on the laser beam, and to output the shaped beam.
Optionally, the laser light source comprises a semiconductor laser chip and a heat sink for carrying the laser chip.
Optionally, the optical shaping device further includes a slow axis collimating lens disposed on an optical axis of the optical lens, and the slow axis collimating lens is configured to perform slow axis collimation again on the light beam emitted from the optical lens.
In another aspect of the present invention, there is provided an optical shaping device comprising a multi-point laser light source and the optical lenses of claim 1 or 2 matched to the number and positions of light emitting points within the multi-point laser light source, each of the optical lenses being disposed on an optical axis of a corresponding light emitting point within the multi-point laser light source, each of the optical lenses being configured to perform fast axis collimation and slow axis pre-collimation of a laser beam emitted by the corresponding light emitting point and to emit shaped beams, respectively, the multi-point laser light source being configured to include at least two light emitting points.
Optionally, the optical shaping device further comprises slow axis collimating lenses matched to the number and positions of the light emitting points in the multi-point laser light source, each slow axis collimating lens being configured to perform slow axis collimation again on the light beam emitted by the corresponding optical lens.
Optionally, the optical shaping device further comprises a slow axis collimating lens array matched with the number and positions of the luminous points in the multi-point laser light source, and the slow axis collimating lens array is configured to perform slow axis collimation again on the light beams emitted by the corresponding optical lenses.
Optionally, the number and positions of the slow axis collimating sub-lenses in the slow axis collimating lens array are matched with the number and positions of the light emitting points in the multi-point laser light source, and each light emitting point in the multi-point laser light source, the corresponding slow axis collimating sub-lens in the slow axis collimating lens array and the corresponding optical lens are arranged on the same optical path in a one-to-one correspondence mode, and the optical axes are coincident.
In another aspect of the present invention, an optical shaping device is provided, the optical shaping device comprising a multi-point laser light source and an optical lens array according to claim 3 matched to the number and position of light emitting points in the multi-point laser light source, each optical sub-lens in the optical lens array being arranged on an optical axis of a corresponding light emitting point in the multi-point laser light source, each optical sub-lens being configured to perform fast axis collimation and slow axis pre-collimation on a laser beam emitted by the corresponding light emitting point and to emit shaped beams respectively, the multi-point laser light source comprising at least two light emitting points.
Optionally, the optical shaping device further comprises slow axis collimating lenses matched to the number and positions of the light emitting points within the multi-point laser light source, each slow axis collimating lens being configured to slow axis collimate the light beam exiting the corresponding optical sub-lens again.
Optionally, the number of the optical sub-lenses in the optical lens array is matched with the number and the positions of the luminous points in the multi-point laser light source, and each luminous point in the multi-point laser light source, the corresponding optical sub-lens in the optical lens array and the corresponding slow axis collimating lens are arranged on the same optical path in a one-to-one correspondence mode and the optical axes are coincident.
Optionally, the optical shaping device further comprises a slow axis collimating lens array matched with the number and positions of the luminous points in the multi-point laser light source, and the slow axis collimating lens array is configured to perform slow axis collimation again on the light beams emitted by the corresponding optical lenses.
Optionally, the number of the optical sub-lenses in the optical lens array is matched with the number and the positions of the light-emitting points in the multi-point laser light source, the number of the slow-axis collimating sub-lenses in the slow-axis collimating lens array is matched with the number and the positions of the light-emitting points in the multi-point laser light source, and each light-emitting point in the multi-point laser light source, the corresponding optical sub-lenses in the optical lens array and the corresponding slow-axis collimating sub-lenses in the slow-axis collimating lens array are arranged on the same optical path in a one-to-one correspondence manner, and the optical axes are coincident.
Optionally, the multi-point laser light source is configured as one or more of a bar comprising at least two light emitting points, an array of bars, a one-dimensional array of single point laser light sources, and a two-dimensional array of single point laser light sources.
In another aspect of the present invention, a laser system is provided, comprising the optical shaping device described above.
The beneficial effects of the invention include: the optical lens provided by the invention integrates the fast axis collimation function and the slow axis collimation function on the same lens, and simultaneously has the fast axis collimation function and the slow axis collimation function. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention 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 view of an optical lens according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first embodiment of an optical lens array according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a second embodiment of an optical lens array according to an embodiment of the present invention.
FIG. 4 is a schematic view of a first embodiment of an optical shaping device according to the present invention;
FIG. 5 is a schematic view of a second embodiment of an optical shaping device according to the present invention;
FIG. 6 is a schematic diagram of a prior art optical shaping device;
FIG. 7 is a schematic view of a third embodiment of an optical shaping device according to the present invention;
FIG. 8 is a schematic view of a fourth embodiment of an optical shaping device according to the present invention;
FIG. 9 is a schematic diagram of a fifth embodiment of an optical shaping device according to the present invention;
FIG. 10 is a schematic view of a sixth embodiment of an optical shaping device according to the present invention;
FIG. 11 is a schematic view of a seventh embodiment of an optical shaping device according to the present invention;
fig. 12 is a schematic view of an eighth embodiment of an optical shaping device according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention 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 invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
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 invention, 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 invention 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 invention. 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 invention, 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 invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, an embodiment of the present invention provides an optical lens 21, where the optical lens 21 includes an incident surface 2110 and an exit surface 2111, and in particular, the incident surface 2110 is configured to perform fast axis collimation on a light beam incident on the optical lens 21, and the exit surface 2111 is configured to perform slow axis pre-collimation on the light beam incident on the optical lens 21.
Further, the incident surface 2110 is provided as a curved surface along a first direction, and the exit surface 2111 is provided as a curved surface along a second direction, the first direction and the second direction being orthogonal to each other. It will be appreciated that when the first direction is the fast axis direction, the second direction is the slow axis direction. The incident surface 2110 is configured in a hyperboloid structure.
The optical lens 21 provided by the embodiment of the invention integrates the fast axis collimation function and the slow axis collimation function on the same lens, and simultaneously has the functions of fast axis collimation and slow axis collimation. In practical application, when the laser beam emitted by the single-point light source is required to be subjected to fast axis collimation and slow axis collimation simultaneously, the laser beam can be realized by only one lens; when the laser beams emitted by the laser light sources with a plurality of luminous points are required to be collimated in a fast axis and a slow axis, the volumes and the structures of the optical shaping device and the laser system can be greatly reduced, the number of lenses in the optical shaping device and the laser system is reduced, and the assembly efficiency is improved. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Referring to fig. 2 and 3, an optical lens array according to an embodiment of the present invention is shown. The optical lens array 210 is configured as an integrally formed one-dimensional array or two-dimensional array including at least two optical lenses, and the incident surface and the exit surface of each optical lens are aligned respectively, that is, all the incident surfaces are on the same surface, the surface patterns of the incident surfaces are aligned, all the exit surfaces are on the same surface, and the surface patterns of the exit surfaces are aligned. Here, we refer to each optical lens in the integrally formed optical lens array as an optical sub-lens 211. Specifically, the optical lens array 210 may be a one-dimensional matrix (as shown in fig. 2) or a two-dimensional matrix (as shown in fig. 3) according to the number and positions of the light emitting points of the laser light source. It is understood that the optical lens array according to the embodiments of the present invention may be applied to an optical shaping device of a multi-point laser light source including at least two light emitting points. For example, when the multi-point laser light source is a bar including 5 light emitting points or 5 COC coupled arrays, the optical lens array 210 is a 5x1 one-dimensional array (as shown in fig. 2); when the multi-point laser light source is a coupled array comprising 5 bars, and each bar comprises 5 light emitting points, the optical lens array 210 is a 5x5 two-dimensional array (as shown in fig. 2); when the multi-point laser light source is a 5x5 COC coupled array, the optical lens is correspondingly a 5x5 two-dimensional array. Thus, with the increase of the power requirements of the semiconductor laser product, the more light emitting points are required, the embodiment of the invention can be completed by using one optical lens array 210 when performing fast axis collimation and slow axis collimation, the number of lenses is further reduced, and meanwhile, the assembly efficiency is further increased and the product volume is further reduced due to the reduction of the number of lenses. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Referring to fig. 4, a first embodiment of the optical shaping device provided by the present invention is shown, where the optical shaping device includes a single-point laser light source 20 and an optical lens 21 disposed in a light emitting direction of the single-point laser light source 20, the single-point laser light source 20 is configured to emit a laser beam, and the optical lens 21 is configured to perform fast axis collimation and slow axis pre-collimation on the laser beam, and emit the shaped beam. The single-point laser light source 20 in the embodiment of the invention can realize the simultaneous fast axis collimation and slow axis pre-collimation of the laser beam emitted by the single-point laser light source through one optical lens 21, thereby reducing the number of collimating lenses, reducing the volume of the optical shaping device, and further improving the assembly efficiency due to the reduction of the number of the collimating lenses. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Further, in the embodiment of the present invention, the single-point laser light source 20 is COC (Chip On Carrier), and includes a semiconductor laser chip and a heat sink for carrying the laser chip. The semiconductor laser chip is a single-tube semiconductor laser chip, and the single-tube semiconductor laser chip can be a single quantum well semiconductor laser chip or a multiple quantum well semiconductor laser chip.
Referring to fig. 5, a second embodiment of the optical shaping device according to the present invention is shown. In this embodiment of the present invention, according to the first embodiment of the present invention, the optical shaping device further includes a slow axis collimating lens 23 disposed on the optical axis of the optical lens 21, and the slow axis collimating lens 23 is configured to perform slow axis collimation on the light beam emitted from the optical lens 21 again.
Referring to fig. 6, fig. 6 is a schematic diagram of a prior art optical shaping device. Compared with fig. 4 and fig. 5, in the prior art, since the fast axis collimation of the laser beam emitted from the single-point laser source 20 is completed through the fast axis collimation lens 211' and the slow axis collimation lens 212', and the fast axis collimation of the laser beam is completed through the fast axis collimation lens 211', the slow axis collimation lens 212' needs to be set at a position far from the fast axis collimation lens 211' to well complete the collimation of the slow axis of the laser beam, so that the volume of the optical shaping device is increased, which is unfavorable for some applications requiring small volume of the optical shaping device. According to the embodiment of the invention, the optical lens 21 is used for simultaneously carrying out fast axis collimation and slow axis pre-collimation on the laser beam emitted by the single-point laser light source 20, namely, besides carrying out fast axis collimation, the laser beam is simultaneously subjected to slow axis pre-collimation, and the slow axis divergence angle is compressed, so that the distance between the slow axis collimation lens 22 arranged on the optical axis of the optical lens 21 and the optical lens 21 can be shortened, the volume of the optical shaping device is reduced, and meanwhile, the assembly efficiency can be improved. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Referring to fig. 7, fig. 7 is a schematic diagram of a third embodiment of an optical shaping device according to the present invention. The optical shaping device comprises a multi-point laser light source 200 and optical lenses 21 matched with the number and positions of the light emitting points 201 in the multi-point laser light source, each optical lens 21 is arranged on an optical axis corresponding to the corresponding light emitting point 201 in the multi-point laser light source 200, and each optical lens 21 is configured to perform fast axis collimation and slow axis pre-collimation on laser beams emitted by the corresponding light emitting point 201 and emit shaped beams respectively.
In the embodiment of the present invention, the multi-point laser light source 200 is illustratively a multi-point laser light source having 5 light emitting points 201. In the following embodiments, a multi-point laser light source including 5 light emitting points is also illustrated as an example, it may be understood that the multi-point laser light source 200 may be one or more of a bar with multiple light emitting points, a bar coupling array, a one-dimensional coupling array of single-point laser light sources, and a two-dimensional coupling array of single-point laser light sources, and those skilled in the art may obtain other technical solutions of multi-point laser light sources according to the embodiment of the multi-point laser light source including 5 light emitting points and specific language descriptions, which are not repeated in the embodiments of the present invention. Alternatively, the multi-point laser light source 200 may be a bar with multiple light emitting points, a bar array composed of bars, a one-dimensional array of COCs or a two-dimensional array of COCs composed of COCs as described in the first embodiment of the present invention, or a combination of light sources including multiple light emitting points. The number and position of the optical lenses 21 are matched with the number and position of the light emitting points 201 of the multi-point laser light source 200, and it is understood that each light emitting point 201 in the multi-point laser light source 200 and the corresponding optical lens 21 are arranged on the same optical path in a one-to-one correspondence manner and the optical axes are coincident. The laser beam emitted from each light emitting point 201 in the multi-point laser light source 200 is incident to the corresponding optical lens 21, and is subjected to fast axis collimation and slow axis pre-collimation by the optical lens 21, and the beam shaped by the corresponding light emitting point 201 is output. Referring to fig. 6, in the prior art, since the laser beam emitted from each light emitting point 201 is collimated by the fast axis collimating lens 211' and the slow axis collimating lens 212' respectively, after the laser beam is collimated by the fast axis collimating lens 211' and the slow axis collimating lens is completed, the slow axis of the laser beam has a divergence angle of 8 ° -12 °, and the slow axis collimating lens 212' needs to be set at a position far from the fast axis collimating lens 211' to well complete the collimation of the slow axis of the laser beam, which is not only unfavorable for application in some occasions with small volume requirements on the optical shaping device, but also because each light emitting point 201 needs to assemble the corresponding fast axis collimating lens 211' and slow axis collimating lens 212', as the power requirements of the semiconductor laser product are increased, the required light emitting points are increased, the number of lenses is increased, and the assembly efficiency is reduced, and the product volume is increased. According to the embodiment of the invention, the corresponding number and positions of the optical lenses 21 are arranged to perform fast axis collimation and slow axis pre-collimation on the laser beams emitted by the corresponding luminous points 201 in the multi-point laser light source 200 at the same time, and as the power requirement of the application on a semiconductor laser product is improved, the more the required luminous points are, compared with the prior art, the number of lenses used in the embodiment of the invention is obviously reduced, meanwhile, the assembly efficiency is obviously improved and the product volume is obviously reduced due to the reduction of the number of lenses. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Referring to fig. 8, fig. 8 is a schematic diagram of a fourth embodiment of an optical shaping device according to the present invention. In an embodiment of the present invention, according to the third embodiment of the present invention, the optical shaping device further includes a plurality of slow axis collimating lenses 22 matched to the number and positions of the light emitting points 201 in the multi-point laser light source 200, and the plurality of slow axis collimating lenses 22 are configured to perform slow axis collimation again on the light beams emitted from the corresponding optical lenses.
In particular, in some cases where there is a higher requirement for fast and slow axis beam collimation, a further slow axis collimation is required for the beam passing through the optical lens 21 to achieve fast and slow axis pre-collimation. In the embodiment of the present invention, a plurality of optical lenses 21 matching the number and positions of the light-emitting points 201 in the multi-point laser light source 200 and a plurality of slow-axis collimating lenses 22 matching the number and positions of the light-emitting points 201 in the multi-point laser light source 200 are provided, and compared with the prior art, the number of lenses used in performing fast-axis collimation and slow-axis collimation is greatly reduced due to the optical lenses 21, so that the volume of the optical shaping device can be reduced, and the assembly efficiency can be improved. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Referring to fig. 9, fig. 9 is a schematic diagram of a fifth embodiment of an optical shaping device according to the present invention. In an embodiment of the present invention, according to the third embodiment of the present invention, the optical shaping device further includes a slow axis collimating lens array 220, and the slow axis collimating lens array 220 is configured to perform slow axis collimation again on the light beam emitted from each of the optical lenses 21.
In particular, in some cases where there is a higher requirement for fast and slow axis beam collimation, a further slow axis collimation is required for the beam passing through the optical lens 21 to achieve fast and slow axis pre-collimation. In an embodiment of the present invention, for the multi-point laser light source 200, a slow axis collimating lens array 220 is provided after a plurality of the optical lenses 21. It will be appreciated that the number and positions of the slow axis collimating sub-lenses 221 in the slow axis collimating lens array 220 are matched with the number and positions of the light emitting points 201 of the multi-point laser light source, and each light emitting point 201 in the multi-point laser light source 200, the corresponding optical lens 21 and the corresponding slow axis collimating sub-lens 221 in the slow axis collimating lens array 220 are disposed on the same optical path in a one-to-one correspondence manner, and the optical axes are coincident, and each slow axis collimating sub-lens 221 in the slow axis collimating lens array 220 is configured to perform slow axis collimation again on the light beam emitted by the corresponding optical lens 21. Referring to fig. 6, in the prior art, since the laser beam emitted from each light emitting point 201 is collimated by the fast axis collimating lens 211' and the slow axis collimating lens 212' respectively, after the laser beam is collimated by the fast axis collimating lens 211' and the slow axis collimating lens is completed, the slow axis of the laser beam has a divergence angle of 8 ° -12 °, and the slow axis collimating lens 212' needs to be set at a position far from the fast axis collimating lens 211' to well complete the collimation of the slow axis of the laser beam, which is not only unfavorable for application in some occasions with small volume requirements on the optical shaping device, but also because each light emitting point 201 needs to assemble the corresponding fast axis collimating lens 211' and slow axis collimating lens 212', as the power requirements of the semiconductor laser product are increased, the required light emitting points are increased, the number of lenses is increased, and the assembly efficiency is reduced, and the product volume is increased. According to the embodiment of the invention, the optical lens 21 is arranged on the optical path corresponding to each luminous point 201 in the multi-point laser light source 200 to perform fast axis collimation and slow axis collimation on the laser beam emitted by each luminous point 201 of the multi-point laser light source 200 at the same time, namely, besides performing fast axis collimation, the laser beam is simultaneously subjected to slow axis pre-collimation, so that the slow axis divergence angle is greatly compressed, and the distance between the slow axis collimating lens array 220 arranged on the optical axis of the optical lens 21 and the optical lens 21 is shortened, and the volume of the optical shaping device is reduced. With the improvement of the power requirement of the semiconductor laser product, the more the required luminous points are, compared with the prior art, the embodiment of the invention not only greatly reduces the number of lenses used in the process of performing fast axis collimation and slow axis collimation, but also shortens the distance between the slow axis collimation lens array 220 and the optical lens 21 in the process of performing slow axis collimation again, and only one slow axis collimation lens array 220 is needed to complete slow axis collimation again, meanwhile, the assembly efficiency is obviously improved due to the reduction of the number of lenses, and the product volume is also obviously reduced. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Referring to fig. 10, fig. 10 is a schematic diagram of a sixth embodiment of an optical shaping device according to the present invention. The optical shaping device comprises a multi-point laser light source 200 and the optical lens array 210 matched with the number and the positions of the light emitting points 201 in the multi-point laser light source, each optical sub-lens 211 in the optical lens array 210 is arranged on the optical axis of the corresponding light emitting point 201 in the multi-point laser light source 200, and each optical sub-lens 211 is configured to perform fast axis collimation and slow axis pre-collimation on the laser beam emitted by the corresponding light emitting point 201 and emit shaped beams respectively. The multi-spot laser light source 200 comprises at least two light emitting spots.
In the embodiment of the present invention, the multi-point laser light source 200 is illustratively a multi-point laser light source including 5 light emitting points 201. In the following embodiments, a multi-point laser light source including 5 light emitting points is also illustrated as an example, it may be understood that the multi-point laser light source 200 may be one or more of a bar with multiple light emitting points, a bar coupling array, a one-dimensional coupling array of single-point laser light sources, and a two-dimensional coupling array of single-point laser light sources, and those skilled in the art may obtain other technical solutions of multi-point laser light sources according to the embodiment of the multi-point laser light source including 5 light emitting points and specific language descriptions, which are not repeated in the embodiments of the present invention. Alternatively, the multi-point laser light source 200 may be a bar with multiple light emitting points, a bar array composed of bars, a one-dimensional array of COCs or a two-dimensional array of COCs composed of COCs as described in the first embodiment of the present invention, or a combination of light sources including multiple light emitting points. The number and positions of the optical sub-lenses 211 in the optical lens array 210 are matched with the number and positions of the light-emitting points 201 of the multi-point laser light source 200, and it is understood that each light-emitting point 201 in the multi-point laser light source 200 and the corresponding optical sub-lens 211 are arranged on the same optical path in a one-to-one correspondence manner and the optical axes are coincident. The laser beam emitted from each light emitting point 201 in the multi-point laser light source 200 is incident to the corresponding optical sub-lens 211, and is subjected to fast axis collimation and slow axis pre-collimation by the optical sub-lens 211, and the beam shaped by the corresponding light emitting point 201 is output. Referring to fig. 6, in the prior art, since the laser beam emitted from each light emitting point 201 is collimated by the fast axis collimating lens 211' and the slow axis collimating lens 212' respectively, after the laser beam is collimated by the fast axis collimating lens 211' and the slow axis collimating lens is completed, the slow axis of the laser beam has a divergence angle of 8 ° -12 °, and the slow axis collimating lens 212' needs to be set at a position far from the fast axis collimating lens 211' to well complete the collimation of the slow axis of the laser beam, which is not only unfavorable for application in some occasions with small volume requirements on the optical shaping device, but also because each light emitting point 201 needs to assemble the corresponding fast axis collimating lens 211' and slow axis collimating lens 212', as the power requirements of the semiconductor laser product are increased, the required light emitting points are increased, the number of lenses is increased, and the assembly efficiency is reduced, and the product volume is increased. According to the embodiment of the invention, through the arrangement of the optical sub-lenses 21 with the corresponding number and positions in the optical lens array 210, the laser beams emitted from the corresponding luminous points 201 in the multi-point laser light source 200 are simultaneously subjected to fast axis collimation and slow axis pre-collimation, and as the power requirements of the semiconductor laser product are improved due to application, the number of the required luminous points is increased, compared with the prior art, the number of the lenses used in the embodiment of the invention is obviously reduced, meanwhile, the assembly efficiency is obviously improved, and the product volume is also obviously reduced due to the reduction of the number of the lenses. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Referring to fig. 8, fig. 8 is a schematic diagram of a seventh embodiment of an optical shaping device according to the present invention. In an embodiment of the present invention, according to the sixth embodiment of the present invention, the optical shaping device further includes a plurality of slow axis collimating lenses 22 matched to the number and positions of the light emitting points 201 in the multi-point laser light source 200, and the plurality of slow axis collimating lenses 22 are configured to perform slow axis collimation again on the light beams emitted from the corresponding optical lenses.
In particular, in some cases where there is a higher requirement for fast and slow axis beam collimation, a further slow axis collimation is required for the beam passing through the optical lens 21 to achieve fast and slow axis pre-collimation. In the embodiment of the present invention, a plurality of optical lenses 21 matching the number and positions of the light-emitting points 201 in the multi-point laser light source 200 and a plurality of slow-axis collimating lenses 22 matching the number and positions of the light-emitting points 201 in the multi-point laser light source 200 are provided, and compared with the prior art, the number of lenses used in performing fast-axis collimation and slow-axis collimation is greatly reduced due to the optical lens array 210, so that the volume of the optical shaping device can be reduced, and the assembly efficiency can be improved. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
Referring to fig. 12, fig. 12 is a schematic view of an eighth embodiment of an optical shaping device according to the present invention. In an embodiment of the present invention, according to the sixth embodiment of the present invention, the optical shaping device further includes a slow axis collimating lens array 220, and the slow axis collimating lens array 220 is configured to perform slow axis collimation again on the light beam emitted from each of the optical lenses 21.
In particular, in some cases where there is a higher requirement for fast and slow axis beam collimation, a further slow axis collimation is required for the beam passing through the optical lens 21 to achieve fast and slow axis pre-collimation. In an embodiment of the present invention, for the multi-point laser light source 200, a slow axis collimating lens array 220 is disposed behind the optical lens array 210. It will be appreciated that the number and positions of the slow axis collimating sub-lenses 221 in the slow axis collimating lens array 220 are matched with the number and positions of the light emitting points 201 of the multi-point laser light source, and each light emitting point 201 in the multi-point laser light source 200, the corresponding optical sub-lens 211 in the optical lens array 210, and the corresponding slow axis collimating sub-lens 221 in the slow axis collimating lens array 220 are disposed on the same optical path in a one-to-one correspondence manner, and the optical axes are coincident, and each slow axis collimating sub-lens 221 in the slow axis collimating lens array 220 is configured to perform slow axis collimation again on the light beam emitted by the corresponding optical sub-lens 211. Referring to fig. 6, in the prior art, since the laser beam emitted from each light emitting point 201 is collimated by the fast axis collimating lens 211' and the slow axis collimating lens 212' respectively, after the laser beam is collimated by the fast axis collimating lens 211' and the slow axis collimating lens is completed, the slow axis of the laser beam has a divergence angle of 8 ° -12 °, and the slow axis collimating lens 212' needs to be set at a position far from the fast axis collimating lens 211' to well complete the collimation of the slow axis of the laser beam, which is not only unfavorable for application in some occasions with small volume requirements on the optical shaping device, but also because each light emitting point 201 needs to assemble the corresponding fast axis collimating lens 211' and slow axis collimating lens 212', as the power requirements of the semiconductor laser product are increased, the required light emitting points are increased, the number of lenses is increased, and the assembly efficiency is reduced, and the product volume is increased. According to the embodiment of the invention, the optical sub-lens 211 in the optical lens array 210 is arranged on the optical path corresponding to each light-emitting point 201 in the multi-point laser light source 200 to perform fast axis collimation and slow axis collimation on the laser beam emitted by each light-emitting point 201 of the multi-point laser light source 200 at the same time, so that the slow axis divergence angle is greatly compressed, the distance between the slow axis collimating lens array 220 arranged on the optical axis of the optical lens array 210 and the optical lens array 210 can be shortened, and the volume of the optical shaping device is reduced. With the improvement of the power requirement of the semiconductor laser product, the more the required luminous points are, compared with the prior art, the embodiment of the invention not only greatly reduces the number of lenses used in the process of performing fast axis collimation and slow axis collimation, but also shortens the distance between the slow axis collimation lens array 220 and the optical lens array 210 in the process of performing slow axis collimation again, and only one slow axis collimation lens array 220 is needed to complete slow axis collimation again, meanwhile, the assembly efficiency is obviously improved due to the reduction of the number of lenses, and the product volume is also obviously reduced. The number of lenses is reduced, and meanwhile, the optical power loss caused by the fact that light beams pass through a plurality of lenses in the transmission process is reduced, so that the power of a product is improved.
In another aspect of the present invention, a laser system is provided, comprising the optical shaping device described above. The structure and the beneficial effects of the optical shaping device are described in detail above, so that the detailed description is omitted.
In practical applications, the optical shaping device may further include a reflective element configured to change the direction of the shaped light beam and/or a converging element configured to converge the shaped light beam together for use in a laser system. When the laser light source is a single-point laser light source, the reflecting element is a reflecting mirror, and the converging element is a converging lens; when the laser light source is a multi-point laser light source, the reflecting element is a mirror array and the converging element is a converging lens array. The reflector array and the converging lens array can be integrally formed according to the number and the positions of the luminous points of the multi-point laser light source, and can also be respectively arranged according to the number and the positions of the luminous points of the multi-point laser light source.
The above is only an alternative embodiment of the present invention, and is not intended to limit the present invention, 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 invention should be included in the protection scope of the present invention.
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 (17)
1. An optical lens comprising an entrance face configured to fast-axis collimate a light beam incident on the optical lens and an exit face configured to slow-axis collimate a light beam incident on the optical lens.
2. The optical lens of claim 1, wherein the entrance surface is configured as a curved surface along a first direction and the exit surface is configured as a curved surface along a second direction, the first direction and the second direction being orthogonal to each other.
3. An optical lens array, characterized in that the optical lens array is configured to comprise at least two integrally formed one-dimensional arrays or two-dimensional arrays of optical lenses according to claim 1 or 2, the entrance face and the exit face of each of the optical lenses being respectively aligned.
4. An optical shaping device, comprising a single-point laser light source configured to emit a laser beam and an optical lens according to claim 1 or 2 disposed in an outgoing direction of the single-point laser light source, the optical lens configured to perform fast axis collimation and slow axis pre-collimation on the laser beam, and to output the shaped beam.
5. The optical shaping device of claim 4 wherein the single point laser light source comprises a semiconductor laser chip and a heat sink for carrying the laser chip.
6. The optical shaping device according to claim 4 or 5, further comprising a slow axis collimating lens disposed on the optical axis of the optical lens, the slow axis collimating lens being configured to re-slow axis collimate the light beam exiting the optical lens.
7. An optical shaping device, characterized in that the optical shaping device comprises a multi-point laser light source and the optical lenses according to claim 1 or 2, which are matched with the number and positions of the light emitting points in the multi-point laser light source, each of the optical lenses being arranged on the optical axis of the corresponding light emitting point in the multi-point laser light source, each of the optical lenses being configured to perform fast axis collimation and slow axis pre-collimation on the laser beam emitted by the corresponding light emitting point and to emit shaped beams respectively, the multi-point laser light source being configured to comprise at least two light emitting points.
8. The optical shaping device of claim 7 further comprising slow axis collimating lenses matching the number and location of light emitting points within the multi-point laser light source, each slow axis collimating lens configured to re-slow axis collimate the light beam exiting the corresponding optical lens.
9. The optical shaping device of claim 7 further comprising a slow axis collimating lens array matching the number and location of light emitting points within the multi-point laser light source, the slow axis collimating lens array configured to re-slow axis collimate the light beam exiting the corresponding optical lens.
10. The optical shaping device according to claim 9, wherein the number and positions of slow axis collimating sub-lenses in the slow axis collimating lens array are matched to the number and positions of light emitting points in the multi-point laser light source, and each light emitting point in the multi-point laser light source, a corresponding slow axis collimating sub-lens in the slow axis collimating lens array, and a corresponding optical lens are arranged on the same optical path in a one-to-one correspondence, and optical axes are coincident.
11. An optical shaping device comprising a multi-point laser light source and an optical lens array according to claim 3 matched to the number and position of light emitting points in the multi-point laser light source, each optical sub-lens in the optical lens array being arranged on the optical axis of a corresponding light emitting point in the multi-point laser light source, each optical sub-lens being configured to perform fast axis collimation and slow axis pre-collimation of a laser beam emitted by the corresponding light emitting point and to emit shaped beams respectively, the multi-point laser light source comprising at least two light emitting points.
12. The optical shaping device of claim 11 further comprising slow axis collimating lenses matching the number and location of light emitting points within the multi-point laser light source, each slow axis collimating lens configured to re-slow axis collimate the light beam exiting the corresponding optical sub-lens.
13. The optical shaping device according to claim 12, wherein the number of optical sub-lenses in the optical lens array matches the number and position of the light emitting points in the multi-point laser light source, each light emitting point in the multi-point laser light source, the corresponding optical sub-lens in the optical lens array, and the corresponding slow axis collimating lens are arranged on the same optical path in a one-to-one correspondence and have optical axes coincident.
14. The optical shaping device of claim 11 further comprising a slow axis collimating lens array matching the number and location of light emitting points within the multi-point laser light source, the slow axis collimating lens array configured to re-slow axis collimate the light beam exiting the corresponding optical lens.
15. The optical shaping device according to claim 14, wherein the number of optical sub-lenses in the optical lens array matches the number and position of light emitting points in the multi-point laser light source, the number of slow axis collimating sub-lenses in the slow axis collimating lens array matches the number and position of light emitting points in the multi-point laser light source, and each light emitting point in the multi-point laser light source, a corresponding optical sub-lens in the optical lens array, and a corresponding slow axis collimating sub-lens in the slow axis collimating lens array are disposed on the same optical path in a one-to-one correspondence and have optical axes coincident.
16. The optical shaping device according to any one of claims 7 to 15, wherein the multi-point laser light source is configured as one or more of a bar comprising at least two light emitting points, an array of bars, a one-dimensional array of single point laser light sources, and a two-dimensional array of single point laser light sources.
17. A laser system comprising an optical shaping device as claimed in any one of claims 4 to 16.
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