CN113409228B - Method, device and system for shaping light beam, storage medium and electronic device - Google Patents
Method, device and system for shaping light beam, storage medium and electronic device Download PDFInfo
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- CN113409228B CN113409228B CN202110957492.3A CN202110957492A CN113409228B CN 113409228 B CN113409228 B CN 113409228B CN 202110957492 A CN202110957492 A CN 202110957492A CN 113409228 B CN113409228 B CN 113409228B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
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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
- G02B27/0944—Diffractive optical elements, e.g. gratings, holograms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformation in the plane of the image
- G06T3/40—Scaling the whole image or part thereof
Abstract
The embodiment of the invention provides a method, a device, a system, a storage medium and an electronic device for shaping a light beam, wherein the method comprises the following steps: acquiring a holographic image of a target shape, wherein the holographic image is used for indicating light wave information of a light beam to be shaped; performing wavefront reconstruction processing on the holographic image to obtain a flat-top beam corresponding to the beam to be shaped, wherein the shape of a light spot of the flat-top beam is a target shape; and carrying out magnification scaling on the spot size of the flat-top beam to obtain a target beam with the spot size being the target size, wherein the beam energy of the target beam is equal to that of the beam to be shaped. The invention solves the problem of larger energy loss of the light beam in the light beam shaping process in the related technology, thereby achieving the effect of reducing the energy loss of the light beam in the light beam shaping process.
Description
Technical Field
The embodiment of the invention relates to the field of optics, in particular to a method, a device, a system, a storage medium and an electronic device for shaping a light beam.
Background
With the rapid development of optical communication technology, the precision requirement of industrial precision machining technology is higher and higher, the laser display and laser imaging technologies and the like enter thousands of households, and the fiber laser technology plays an increasingly important role in various industries. Meanwhile, the spatial shape distribution of the laser beam output by the laser is more demanding. In general, the energy of the laser beam output by the laser is approximately gaussian in spatial form, which is called gaussian distribution. However, the gaussian beam cannot meet some special requirements in practical applications, for example, in some practical applications, the energy of the laser beam output by the laser is required to be specifically distributed in a spatial form, and the light spot is required to be specifically distributed in a size and a shape, such as a circular, annular, square, linear, flat-top, and other specific forms, which derives from the laser beam shaping technology.
Since lasers are widely applied, laser shaping technology is widely concerned by engineering technicians, in related technologies, laser beams are shaped through an aperture method and a filter filtering method, the principle of aperture method shaping is that after laser beams emitted by the lasers are collimated and expanded, one or more apertures with specific hole shapes are used for intercepting the laser beams, and therefore laser beams with required spatial shape distribution are obtained, the principle of filter filtering method shaping is that a filter filters laser energy distribution outside a set radius along with the increase of laser spot radius to achieve the purpose of shaping output laser beams, and although the method can shape the spatial shape of the laser beams and the size and shape of the spots, the energy of the laser beams shaped through the method is greatly reduced.
Aiming at the problem of large energy loss of light beams in the light beam shaping process in the related technology, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method, a device, a system, a storage medium and an electronic device for shaping a light beam, which are used for at least solving the problem of large energy loss of the light beam in the light beam shaping process in the related art.
According to an embodiment of the present invention, there is provided a method of shaping a light beam, including: acquiring a holographic image of a target shape, wherein the holographic image is used for indicating beam information of a beam to be shaped; performing wavefront reconstruction processing on the holographic image to obtain a flat-top beam corresponding to the beam to be shaped, wherein the shape of a light spot of the flat-top beam is the target shape; and carrying out magnification scaling on the spot size of the flat-topped beam to obtain a target beam with the spot size being a target size, wherein the beam energy of the target beam is equal to that of the beam to be shaped.
Optionally, acquiring the holographic image of the target shape comprises: acquiring the light beam to be shaped and the auxiliary light beam; and simultaneously irradiating the holographic negative film with the target shape by using the beam to be shaped and the auxiliary beam to obtain the holographic image.
Optionally, the performing the wavefront reconstruction processing on the holographic image to obtain the flat-topped beam corresponding to the beam to be shaped includes: acquiring a reference beam with the same beam information as the beam to be shaped; and irradiating the holographic image of the target shape by using the reference beam to obtain the flat-topped beam.
Optionally, the scaling factor scaling the spot size of the flat-topped beam to obtain the target beam with the spot size as the target size includes: after the flat-top light beam is obtained, carrying out aberration-free transmission on the flat-top light beam; and carrying out magnification scaling on the spot size of the flat-topped beam after aberration-free transmission to obtain the target beam with the spot size being the target size.
There is also provided, in accordance with yet another embodiment of the present invention, a system for shaping a light beam, including: the holographic device is used for acquiring a holographic image of a target shape and performing wavefront reconstruction processing on the holographic image to obtain a flat-top beam corresponding to a beam to be shaped, wherein the holographic image is used for indicating beam information of the beam to be shaped, and the shape of a light spot of the flat-top beam is the target shape; the beam imaging device is used for carrying out magnification scaling on the spot size of the flat-topped beam to obtain a target beam with the spot size being a target size, wherein the beam energy of the target beam is equal to the beam energy of the beam to be shaped.
Optionally, the holographic device further comprises: a holographic negative for generating the holographic image of the beam to be shaped; and the holographic device is used for generating the flat-top light beam corresponding to the light beam to be shaped according to a reference light beam and the holographic image, wherein the beam information of the reference light beam is the same as that of the light beam to be shaped.
Optionally, the light beam imaging apparatus includes a first optical device group, and the first optical device group is configured to perform the magnification scaling on the spot size of the flat-topped light beam, so as to obtain the target light beam with the spot size equal to the target size.
Optionally, the beam shaping system further comprises a beam transmission device for transmitting the flat-topped beam generated by the holographic device to the beam imaging device without aberration, and the beam transmission device is respectively connected with the holographic device and the beam imaging device.
Optionally, the beam delivery device comprises a second optics group with curvature, the second optics group being used for aberration-free delivery of the flat-topped beam.
According to still another embodiment of the present invention, there is also provided a beam shaping apparatus including: the device comprises an acquisition module, a shaping module and a control module, wherein the acquisition module is used for acquiring a holographic image of a target shape, and the holographic image is used for indicating beam information of a beam to be shaped; the processing module is used for performing wave-front reconstruction processing on the holographic image to obtain a flat-top beam corresponding to the beam to be shaped, wherein the shape of a light spot of the flat-top beam is the target shape; and the scaling module is used for scaling the light spot size of the flat-topped light beam in a multiplying factor manner to obtain a target light beam with the light spot size being a target size, wherein the beam energy of the target light beam is equal to the beam energy of the light beam to be shaped.
According to a further embodiment of the present invention, there is also provided a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
By the method, the holographic image of the target shape is obtained, wherein the holographic image is used for indicating the light wave information of the light beam to be shaped; performing wavefront reconstruction processing on the holographic image to obtain a flat-top beam corresponding to the beam to be shaped, wherein the shape of a light spot of the flat-top beam is a target shape; multiplying power scaling is carried out on the spot size of the flat-top light beam to obtain a target light beam with the spot size being a target size, wherein the light beam energy of the target light beam is equal to the light beam energy of the light beam to be shaped, namely the holographic image is used for indicating the light wave information of the light beam to be shaped, the flat-top light beam corresponding to the light beam to be shaped can be obtained by carrying out wave front reconstruction processing on the holographic image of the target shape, the energy density of the light beam is adjusted, the spot shape of the flat-top light beam is the same as the shape of the holographic image and is also the target shape, the target light beam is obtained by multiplying power scaling the spot size of the flat-top light beam, shaping of the light beam to be shaped is completed, the target light beam of the target size and the target shape is obtained, and the energy of the light beam is not influenced, namely the light beam energy of the shaped target light beam is equal to the light beam energy of the target light beam to be shaped, therefore, the light beam is shaped under the condition of not losing the light beam energy, the problem that the light beam energy loss in the light beam shaping process is large in the related technology is solved, and the effect of reducing the light beam energy loss in the light beam shaping process is achieved.
Drawings
Fig. 1 is a block diagram of a hardware structure of a mobile terminal of a method for shaping a beam according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of shaping a light beam according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a beam shaping process according to an embodiment of the present invention;
FIG. 4 is a block diagram of a beam shaping system according to an embodiment of the present invention;
fig. 5 is a block diagram of a beam shaping apparatus according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The method embodiments provided in the embodiments of the present invention may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking the example of the method operating on a mobile terminal, fig. 1 is a block diagram of a hardware structure of the mobile terminal of the method for shaping a light beam according to the embodiment of the present invention. As shown in fig. 1, the mobile terminal may include one or more (only one shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 104 for storing data, wherein the mobile terminal may further include a transmission device 106 for communication functions and an input-output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 can be used for storing computer programs, for example, software programs and modules of application software, such as computer programs corresponding to the method for shaping a light beam in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer programs stored in the memory 104, so as to implement the method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
In the present embodiment, a method for shaping a light beam is provided, and fig. 2 is a flowchart of a method for shaping a light beam according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202, acquiring a holographic image of a target shape, wherein the holographic image is used for indicating beam information of a beam to be shaped;
step S204, performing wave-front reconstruction processing on the holographic image to obtain a flat-top beam corresponding to the beam to be shaped, wherein the shape of a light spot of the flat-top beam is the target shape;
and S206, multiplying power scaling is carried out on the spot size of the flat-topped beam to obtain a target beam with the spot size being a target size, wherein the beam energy of the target beam is equal to the beam energy of the beam to be shaped.
Through the steps, the holographic image is used for indicating the light wave information of the light beam to be shaped, the flat-top light beam corresponding to the light beam to be shaped can be obtained by performing wavefront reconstruction processing on the holographic image with the target shape, the energy density of the light beam is adjusted, the shape of a light spot of the flat-top light beam is the same as that of the holographic image and is the target shape, the target light beam is obtained by scaling the multiplying power of the light spot size of the flat-top light beam, the shaping of the light beam to be shaped is completed, the target light beam with the target size and the target shape of the light spot is obtained, and the energy of the light beam is not influenced, namely the light beam energy of the shaped target light beam is equal to that of the target light beam to be shaped, so that the light beam is shaped under the condition of not losing the light beam energy, and therefore, the problem that the light beam energy loss in the light beam shaping process in the related technology is large is solved, the effect of reducing the energy loss of the light beam in the light beam shaping process is achieved.
In the technical solution provided in step S202, the light beam to be shaped may be a light beam in any mode, for example, the light beam to be shaped may include one or more of a fundamental mode, a low-order mode, and a high-order mode, and this solution is not limited thereto.
Optionally, in this embodiment, the holographic image may be a holographic image of any shape generated by other devices, or may be generated on a holographic negative film of any shape according to the light beam to be shaped, that is, the shape of the holographic negative film or the holographic image may be a target shape or may not be a target shape, for example, when the holographic negative film or the holographic image is not a target shape, the holographic negative film or the holographic image may be cut into a target shape, so that the holographic image is a target shape.
Optionally, in this embodiment, the light beam to be shaped may be a light beam with any energy distribution, for example, the light beam to be shaped may be a light beam with a gaussian distribution or a light beam with a flat-top distribution, which is not limited in this disclosure.
Alternatively, in the present embodiment, the light beam information may include, but is not limited to, amplitude information, phase information, light beam energy information, wavelength information, transmission direction, and the like of the light wave in the light beam, and the present embodiment is not limited thereto.
In the technical solution provided in step S204, the transmission direction of the flat-topped beam may be the same as the transmission direction of the beam to be shaped, or may be different from the transmission direction of the beam to be shaped, and this solution is not limited thereto.
In the technical solution provided in step S206, the magnification scaling may be to enlarge or reduce the spot size of the light beam by any factor, for example, enlarge or reduce the spot size by 1.01, 1.001, 1.0001, and the like, which is not limited in this embodiment.
As an optional implementation, acquiring the holographic image of the target shape includes:
acquiring the light beam to be shaped and the auxiliary light beam;
and simultaneously irradiating the holographic negative film with the target shape by using the beam to be shaped and the auxiliary beam to obtain the holographic image.
Optionally, in this embodiment, the hologram negative film may be a negative film with any size, for example, the size of the hologram negative film may be larger than the target size, may be smaller than the target size, and may also be equal to the target size, which is not limited in this embodiment.
Alternatively, in this embodiment, the auxiliary beam may be a beam having the same beam information as that of the beam to be shaped, for example, the amplitude and phase of the auxiliary beam are the same as those of the beam to be shaped, and the auxiliary beam may be a beam different from the beam information of the beam to be shaped, which is determined according to the beam information of the beam to be shaped.
Optionally, in this embodiment, the light beam to be shaped and the auxiliary light beam may illuminate the hologram negative according to a target angle when illuminating the hologram negative, where the target angle may be a fixed value, or may be an angle value determined according to beam information of the light beam to be shaped, for example, an angle value determined when the light beam to be shaped and the auxiliary light beam illuminate the hologram negative according to the amplitude, phase, and wavelength of the light beam to be shaped.
As an optional implementation manner, the performing the wavefront reconstruction processing on the holographic image to obtain the flat-topped beam corresponding to the beam to be shaped includes:
acquiring a reference beam with the same beam information as the beam to be shaped;
and irradiating the holographic image of the target shape by using the reference beam to obtain the flat-topped beam.
Optionally, in this embodiment, the reference light beam may be obtained by splitting the light beam to be shaped by using a splitting device, or may be emitted by other light beam emitting devices, which is not limited in this embodiment.
Optionally, in this embodiment, the transmission direction of the reference beam and the transmission direction of the auxiliary beam are the same.
As an optional embodiment, performing magnification scaling on the spot size of the flat-topped beam to obtain the target beam with the spot size of the target size includes:
after the flat-top light beam is obtained, carrying out aberration-free transmission on the flat-top light beam;
and carrying out magnification scaling on the spot size of the flat-topped beam after aberration-free transmission to obtain the target beam with the spot size being the target size.
Optionally, in this embodiment, the energy density on the spot does not change before and after aberration-free transmission.
Optionally, in this embodiment, aberration-free transmission may be, but is not limited to, transmission through a set of optical devices with curvature.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention.
Fig. 3 is a schematic diagram of a beam shaping process according to an embodiment of the present invention, which may include, but is not limited to, the following steps, as shown in fig. 3:
step S301, the laser beam output by the fiber laser with the single-mode output average power of 2000W is a laser source, the specific light spot mode is an output fundamental mode, the diameter of the light spot is 7mm, and the beam quality is M21.4, the spatial energy distribution of the output beam is Gaussian distribution, namely, the output beam is in a 'sharp-top' parabola shape, in the mode, most of the energy of the laser beam is concentrated at the position of the 'sharp top' distributed to the cross section space of the beam, the power density at the peak position is higher, and the laser output beam of the Gaussian beam distribution is more suitable for marking, punching and the like of substancesThe reason for the deep processing. However, in other laser applications, such as the fine processing of brittle substances, thin film materials, semiconductor chips, etc., the processing process requires uniform energy density, and does not require the energy density of the laser beam to be concentrated on some points, but the laser spot to be output has uniform energy density, however, for the fiber laser, since the optical path is the structure of the fiber and the output is the characteristic of the fiber, the beam quality, the divergence angle, etc. are much better than those of other lasers, the spot is also significantly smaller than that of other lasers, i.e., the fiber laser outputting the same average power, and the energy density of the spot is significantly greater than that of other lasers, which results in the need of shaping the output beam of the fiber laser in some special applications, and the purpose of shaping the laser beam into a "flat-top" shape of the spatial distribution of the beam energy is achieved.
Step S302, after a laser beam emitted by a fiber laser is incident to a holographic device, a required light spot shape is generated, namely a flat-top-shaped uniform light beam energy space distribution shape is generated, the principle is that the first step of the holographic device is to divide the incident laser into two beams of consistent laser, the original light wave information is recorded by utilizing the interference principle, namely the shooting process, and the outline of the shot laser beam forms a diffusion type object beam under the irradiation of the laser; and secondly, using the other part of laser as a reference beam to irradiate the holographic film, forming a required shape of a flat-top beam by modulating a holographic device, and superposing the laser beam with an object beam to generate interference, in other words, forming a conjugate image of an image formed by the object beam formed in the first step and an image formed in the second step, converting phase and amplitude information of each point on the original laser beam light wave into intensity which is changed on a flat-top space, and recording and outputting all information of light spots of the laser beam output by the original fiber laser by using contrast and intervals among interference fringes. It can also be seen that the spatial field distribution of the laser beam shaped by this method depends on the shape of the holographic image, so the final beam output spatial field distribution can be of any type.
Step S303, using a light beam transmission device to perform aberration-free transmission on the laser beam with the "flat-top" uniform light spot obtained in step S302, and transmitting the light beam to an optical imaging device, where the light beam transmission system is an aberration-free optical system to avoid quality degradation of energy density of the light spot during light beam transmission, the optical transmission device may be a transmission type and is composed of a set of optical devices with curvature, and the combination of the optical devices performs targeted modulation according to the amplitude phase of the hologram to eliminate aberration, so as to ensure that the root mean square value of the change of the transmitted wavefront after the light beam passing through the hologram passes through the light beam transmission device is less than 1/10 wavelengths, the maximum and minimum value of the influence on the energy density of the uniformity of the flat-top uniform light spot is less than 1%, and ensure that the entire content of the hologram is effectively transmitted.
Step S304, the beam imaging device is an optical device which finally images the hologram on an image surface according to the actual application requirement, namely the surface of the object to be processed, or any position, and is provided with an optical device for amplifying or reducing the magnification of the spot size of the laser spot, and the optical device can be a transmission type structure or a reflection type structure, mainly reproduces the image of the hologram, and can uniformly amplify or reduce the spot according to the actual requirement, namely, the formed uniform flat-top-shaped spot beam is incident on the object to be processed in a shape with proper size; for example, the optical imaging device can be a projection optical device for low-power fiber laser output, and can realize image output with special shapes.
And step S305, outputting the laser beam with the shape, the size and the energy distribution of the light spot meeting the requirements.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, a system for shaping a light beam is further provided, and fig. 4 is a block diagram of a structure of the system for shaping a light beam according to an embodiment of the present invention, as shown in fig. 4, the system includes:
the holographic device 402 is configured to perform wavefront reconstruction processing on an acquired holographic image of a target shape to obtain a flat-top beam corresponding to a beam to be shaped, where the holographic image is used to indicate beam information of the beam to be shaped, and a spot shape of the flat-top beam is the target shape;
the beam imaging device 404 is configured to perform magnification scaling on the spot size of the flat-topped beam to obtain a target beam with a target spot size, where the beam energy of the target beam is equal to the beam energy of the beam to be shaped.
As an optional embodiment, the holographic device further comprises:
a holographic negative for generating the holographic image of the beam to be shaped;
and the holographic device is used for generating the flat-top light beam corresponding to the light beam to be shaped according to a reference light beam and the holographic image, wherein the beam information of the reference light beam is the same as that of the light beam to be shaped.
Alternatively, in the present embodiment, the holographic device may be, but is not limited to, a plurality of optical devices, and the optical devices are arranged in a specific arrangement manner.
As an optional embodiment, the light beam imaging apparatus includes a first optical device group, and the first optical device group is configured to perform the magnification scaling on the spot size of the flat-topped light beam, so as to obtain the target light beam with a spot size equal to the target size.
Alternatively, in the present embodiment, the first optical device group may be, but is not limited to, one in which a plurality of optical devices with curvature are arranged in a certain manner.
Optionally, in this embodiment, the first optical device group may be a transmissive optical device group, and may also be a reflective optical device group, and this embodiment is not limited in comparison.
As an optional embodiment, the beam shaping system further comprises a beam transmission device, the beam transmission device is configured to transmit the flat-topped beam generated by the holographic device to the beam imaging device without aberration, and the beam transmission device is respectively connected to the holographic device and the beam imaging device.
Optionally, in this embodiment, the light beam transmission device may be a transmissive type or a reflective type, and this scheme is not limited to this.
As an alternative embodiment, the beam delivery device comprises a second optics group with curvature for aberration-free delivery of the flat-topped beam.
Alternatively, in the present embodiment, the second optical device group may be, but is not limited to, one in which a plurality of optical devices with curvature are arranged in a certain manner.
Alternatively, in this embodiment, the second optics group may be based on amplitude and phase information in the holographic image.
In this embodiment, there is further provided a beam shaping apparatus, and fig. 5 is a block diagram of a structure of the beam shaping apparatus according to the embodiment of the present invention, as shown in fig. 5, the apparatus includes:
an obtaining module 502, configured to obtain a holographic image of a target shape, where the holographic image is used to indicate beam information of a beam to be shaped;
a processing module 504, configured to perform wavefront reconstruction processing on the holographic image to obtain a flat-top beam corresponding to the beam to be shaped, where a spot shape of the flat-top beam is the target shape;
a scaling module 506, configured to perform magnification scaling on the spot size of the flat-topped beam to obtain a target beam with a target spot size, where beam energy of the target beam is equal to beam energy of the beam to be shaped.
Optionally, the obtaining module includes: the first acquisition unit is used for acquiring the beam to be shaped and the auxiliary beam; and the first processing unit is used for simultaneously irradiating the holographic negative film with the target shape by using the beam to be shaped and the auxiliary beam to obtain the holographic image.
Optionally, the processing module includes: the second acquisition unit is used for acquiring the reference beam which is the same as the beam information of the beam to be shaped; and the second processing unit is used for irradiating the holographic image of the target shape by using the reference beam to obtain the flat-topped beam.
Optionally, the scaling module comprises: the transmission unit is used for carrying out aberration-free transmission on the flat-top beam after the flat-top beam is obtained; and the scaling unit is used for carrying out magnification scaling on the spot size of the flat-topped beam after aberration-free transmission to obtain the target beam with the spot size being the target size.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above-mentioned method embodiments when executed.
In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
In an exemplary embodiment, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary embodiments, and details of this embodiment are not repeated herein.
It will be apparent to those skilled in the art that the various modules or steps of the invention described above may be implemented using a general purpose computing device, they may be centralized on a single computing device or distributed across a network of computing devices, and they may be implemented using program code executable by the computing devices, such that they may be stored in a memory device and executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into various integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method of shaping a light beam, comprising:
acquiring a holographic image of a target shape, wherein the holographic image is used for indicating beam information of a beam to be shaped;
performing wavefront reconstruction processing on the holographic image to obtain a flat-top beam corresponding to the beam to be shaped, wherein the shape of a light spot of the flat-top beam is the target shape;
multiplying power scaling is carried out on the spot size of the flat-topped beam to obtain a target beam with the spot size being a target size, wherein the beam energy of the target beam is equal to that of the beam to be shaped;
wherein acquiring the holographic image of the target shape comprises: acquiring the light beam to be shaped and the auxiliary light beam; using the beam to be shaped and the auxiliary beam to simultaneously irradiate a holographic negative film with a target shape to obtain the holographic image;
performing the wavefront reconstruction processing on the holographic image to obtain the flat-topped beam corresponding to the beam to be shaped comprises: acquiring a reference beam with the same beam information as the beam to be shaped; and irradiating the holographic image of the target shape by using the reference beam to obtain the flat-topped beam.
2. The method of claim 1, wherein said scaling said spot size of said flat-topped beam by said factor to obtain said target beam having a spot size of said target size comprises:
after the flat-top light beam is obtained, carrying out aberration-free transmission on the flat-top light beam;
and carrying out magnification scaling on the spot size of the flat-topped beam after aberration-free transmission to obtain the target beam with the spot size being the target size.
3. A beam shaping system, comprising a holographic device and a beam imaging device,
the holographic device is used for acquiring a holographic image of a target shape and performing wavefront reconstruction processing on the holographic image to obtain a flat-top beam corresponding to a beam to be shaped, wherein the holographic image is used for indicating beam information of the beam to be shaped, and the shape of a light spot of the flat-top beam is the target shape;
the beam imaging device is used for carrying out magnification scaling on the spot size of the flat-topped beam to obtain a target beam with the spot size being a target size, wherein the beam energy of the target beam is equal to the beam energy of the beam to be shaped;
wherein the holographic device further comprises: a holographic negative for generating the holographic image of the beam to be shaped; and the holographic device is used for generating the flat-top light beam corresponding to the light beam to be shaped according to a reference light beam and the holographic image, wherein the beam information of the reference light beam is the same as that of the light beam to be shaped.
4. The system of claim 3, wherein said beam imaging device comprises a first optics group, said first optics group being configured to perform said magnification scaling on a spot size of said flat-topped beam to obtain said target beam having a spot size of said target size.
5. The system of claim 3, wherein the beam shaping system further comprises a beam delivery device for aberration-free delivery of the flat-topped beam generated by the holographic device to the beam imaging device, the beam delivery device being connected to the holographic device and the beam imaging device, respectively.
6. The system of claim 5, wherein the beam delivery device comprises a second optics group with curvature, the second optics group for aberration-free delivery of the flat-topped beam.
7. A device for shaping a light beam, comprising:
the device comprises an acquisition module, a shaping module and a control module, wherein the acquisition module is used for acquiring a holographic image of a target shape, and the holographic image is used for indicating beam information of a beam to be shaped;
the processing module is used for performing wave-front reconstruction processing on the holographic image to obtain a flat-top beam corresponding to the beam to be shaped, wherein the shape of a light spot of the flat-top beam is the target shape;
the scaling module is used for scaling the light spot size of the flat-topped light beam in a multiplying factor manner to obtain a target light beam with the light spot size being a target size, wherein the beam energy of the target light beam is equal to the beam energy of the light beam to be shaped;
wherein the acquisition module comprises: the first acquisition unit is used for acquiring the beam to be shaped and the auxiliary beam; the first processing unit is used for simultaneously irradiating a holographic negative film with a target shape by using the beam to be shaped and the auxiliary beam to obtain the holographic image;
the processing module comprises: the second acquisition unit is used for acquiring the reference beam which is the same as the beam information of the beam to be shaped; and the second processing unit is used for irradiating the holographic image of the target shape by using the reference beam to obtain the flat-topped beam.
8. A computer-readable storage medium, in which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 2.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method as claimed in any of claims 1 to 2 are implemented when the computer program is executed by the processor.
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