Polarization laser beam splitting device and use method thereof

Abstract

The invention relates to the field of laser regulation and control, in particular to a polarization laser beam splitting device and a use method thereof, and the device comprises a shell, a light beam modulation assembly, a photoelectric dual-drive assembly and a light beam separation transmission lens group; the light beam modulation assembly comprises a liquid crystal wave plate and a light addressing liquid crystal light valve; the photoelectric dual-drive assembly comprises an optical driver and an electric driver. The light beam separation transmission mirror group comprises a dichroscope, a polarizing beam splitter and a reflector; complex adjustment or reconfiguration is not needed in an existing optical path system, the optical addressing liquid crystal light valve is controlled through the electric driver and the optical driver, and complex optical combination and a tedious adjustment process in a traditional method are avoided. The energy proportion, the energy distribution, the laser pattern and the light field can be accurately controlled through a computer, and various complex application requirements are met.

Description

Technical Field

[0001] The present invention relates to the field of laser regulation, and in particular to a polarized laser beam splitting device and a use method thereof. Background Art

[0002] Laser beam splitting technology refers to the process of splitting a single incident laser beam into multiple laser beams, which is widely used in scientific research, industrial processing, medical treatment and other fields. At present, commonly used optical components such as beam splitters, polarization beam splitters, and beam splitters can achieve a certain degree of laser beam splitting. However, these traditional optical components have many limitations in the beam splitting process. For example, they usually cannot meet the user's customized requirements for beam energy ratio, energy distribution, laser pattern and light field.

[0003] With the rapid development of laser technology, especially in the field of new laser manufacturing, the control requirements for laser beams are becoming increasingly higher. Not only does it need to transform the laser from a single point to multi-point parallel operation, but it also requires the energy distribution of the laser beam to be precisely controlled. In addition, the pattern and shape of the laser also need to be adjusted according to the specific application scenario.

[0004] Traditional laser beam splitting methods are unable to cope with these complex requirements. They require complex optical combinations and cumbersome adjustment processes, which are not only inefficient but also difficult to ensure the adjustment accuracy. Therefore, a device is needed that can easily and quickly realize customized laser beam splitting, avoid building a complex optical system, and can be applied to high-energy laser systems to meet application requirements in different scenarios. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing laser beam splitting devices cannot meet the user's customized requirements for beam energy ratio, energy distribution, laser pattern and light field, and the adjustment process is complicated and inefficient. The purpose of the present invention is to provide a polarized laser beam splitting device and a method of using it, which can realize convenient and fast customized splitting of the laser beam, avoid the construction of a complex optical system, and can be applied to high-energy laser systems to meet application needs in different scenarios.

[0006] The present invention is achieved through the following technical solutions: A polarized laser beam splitting device comprises: a housing, a beam modulation component, an optoelectronic dual drive component and a beam separation transmission mirror group; The light beam modulation component comprises: a liquid crystal wave plate and a light-addressable liquid crystal light valve, wherein the liquid crystal wave plate and the light-addressable liquid crystal light valve are arranged in close contact with each other and a light beam transmission liquid is inserted in between; The optoelectronic dual drive assembly includes: an optical driver and an electric driver; The beam separation transmission mirror group includes: a dichroic mirror, a polarization beam splitter and a reflector; The housing is provided with an incident light window, a first exit light window, and a second exit light window, the incident light window and the first exit light window are relatively arranged on two opposite surfaces of the housing, and the second exit light window is arranged below the first exit light window; The liquid crystal wave plate, the light-addressable liquid crystal light valve, the dichroic mirror and the polarization beam splitter are sequentially arranged between the incident light window and the first exit light window; the reflector is arranged below the polarization beam splitter; Furthermore, the device also includes a pattern monitoring component, which is a detector. The detector is arranged below the reflector and is used to receive light with information that is leaked by the reflector, and monitor and feed back to the computer in real time.

[0007] The liquid crystal wave plate and the light-addressable liquid crystal light valve are perpendicular to the incident light, the first part of the laser light in the incident light is modulated into a horizontal or vertical polarization direction by the beam modulation component, and the second part of the laser light in the incident light is modulated into a vertical or horizontal polarization direction by the beam modulation component; The first portion of laser light is any specified portion of laser light or any specified energy laser light, and the second portion of laser light is the remaining portion of laser light in the incident light except the first portion of laser light.

[0008] Optionally, the polarization beam splitter is obliquely arranged between the first light exit window and the dichroic mirror, and the reflector is arranged below the polarization beam splitter; The first portion of laser light or the second portion of laser light passing through the polarization beam splitter is emitted from the first light exit window; The second portion of laser light or the first portion of laser light that has not passed through the polarization beam splitter is reflected by the reflector and then emitted from the second light exit window after being reflected by the reflector.

[0009] Optionally, the outgoing light of the first outgoing light window and the outgoing light of the second outgoing light window are arranged in parallel, and the outgoing light of the first outgoing light window coincides with the incident light of the incident light window.

[0010] Optionally, the angle between the polarization beam splitter and the incident light is 45 degrees, and the reflector is arranged in parallel and directly below the polarization beam splitter.

[0011] A method for using a polarization laser beam splitting device, based on the polarization laser beam splitting device as described above, the method for using includes: The device is placed in the optical path, and the incident light enters the incident light window vertically, and the outgoing light of the first outgoing light window is overlapped with the light of the original optical path; the liquid crystal wave plate is adjusted by the electric driver so that no laser is emitted from the second outgoing light window; The optical driver and the electric driver are turned on and adjusted so that no laser is emitted from the first light exit window; the laser is emitted from the second light exit window.

[0012] Selecting to perform laser beam splitting operations, the laser beam splitting operations include: energy ratio beam splitting, pattern beam splitting, energy distribution beam splitting and laser shaping; Control the optical driver to emit addressing light of specific wavelength and energy to the dichroic mirror, the dichroic mirror reflects the addressing light to the optically addressed liquid crystal light valve, and the electrical driver applies a voltage signal to control the state of the optically addressed liquid crystal light valve to modulate the incident light; The modulated incident light is emitted through the first light exit window and the second light exit window.

[0013] Specifically, the specific method of performing energy ratio beam splitting includes: Energy ratio setting: determine the energy ratio required for input; Modulate the optical drive information: control the optical driver to emit the addressing light with uniform energy distribution to the dichroic mirror; Adjust the light valve: The electric driver adjusts the state of the light-addressable liquid crystal light valve according to the set energy ratio, and performs polarization modulation on the incident light according to the energy ratio; Beam splitting result: a part of the laser light is emitted through the first light exit window, and another part of the laser light is emitted through the second light exit window.

[0014] Specifically, the specific method of performing pattern beam splitting includes: Pattern setting: determine the desired laser pattern; Modulating the optical drive information: controlling the optical driver to emit patterned addressing light to the dichroic mirror; Beam splitting result: the target pattern is emitted through the first light exit window, and its complementary pattern is emitted through the second light exit window.

[0015] Specifically, the specific method of performing energy distribution beam splitting includes: Energy distribution settings: determine the desired energy distribution pattern; Modulating the optical drive information: controlling the optical driver to emit addressing light with an energy distribution pattern to the dichroic mirror; Beam splitting result: the energy distribution pattern is emitted through the first light exit window, and its complementary energy distribution is emitted through the second light exit window.

[0016] Specifically, the specific methods for laser shaping include: Shaping settings: Input the required laser shaping parameters through the computer interface.

[0017] Modulating the optical drive information: controlling the optical driver to emit the addressing light with shaping parameter information to the dichroic mirror; Shaping result: the shaped laser is emitted through the first light exit window, and the unshaped laser is emitted through the second light exit window.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention sets a beam splitting device including a liquid crystal wave plate, a light-addressable liquid crystal light valve, a dichroic mirror, a polarization beam splitter and a reflector, so that the device can be directly placed in the target light path without changing the propagation direction of the light beam, thereby achieving the goal of eliminating the need for complex adjustments or reconfigurations in the existing light path system, and controlling the light-addressable liquid crystal light valve through an electric driver and an optical driver, thus avoiding the complex optical combination and cumbersome adjustment process in the traditional method, and being able to accurately control the energy ratio, energy distribution, laser pattern and light field through a computer to meet various complex application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0020] Figure 1 It is a schematic structural diagram of a polarization laser beam splitting device according to the present invention.

[0021] Figure 2 It is a schematic diagram of the principle of a polarization laser beam splitting device according to the present invention.

[0022] Figure numerals: 1-liquid crystal wave plate, 2-light-addressable liquid crystal light valve, 3-dichroic mirror, 4-polarization beam splitter, 5-reflector, 6-electric driver, 7-optical driver, 8-incident light window, 9-first exit light window, 10-second exit light window, 11-housing, 12-detector. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific implementation methods described herein are only used to explain the relevant content, rather than to limit the present invention.

[0024] It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0025] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the absence of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] Embodiment 1, as Figure 1 and Figure 2 As shown, a polarized laser beam splitting device includes: a housing 11, a beam modulation component, a pattern monitoring component, an optoelectronic dual drive component and a beam separation transmission mirror group.

[0029] The light beam modulation component comprises: a liquid crystal wave plate 1 and a light-addressable liquid crystal light valve 2 are arranged in a close relationship and perpendicular to the incident light, and a light beam transmission liquid mainly composed of alicyclic hydrocarbons and hydrogenated triphenyl is inserted in the middle to eliminate the interface interference and reflection at the interface between the two. The liquid crystal wave plate 1 changes the polarization direction of the light beam by introducing a phase difference, and the light beam transmission liquid can fine-tune the composition according to the wavelength of the incident light. The optoelectronic dual drive component includes: an optical driver 7 and an electric driver 6. The light-addressable liquid crystal light valve 2 and the liquid crystal wave plate 1 are driven by the electric driver 6. The optical driver 7 is arranged under the dichroic mirror. The optical driver 7 emits blue addressing light with grayscale information toward the dichroic mirror 3, and is reflected by the dichroic mirror 3 to the light-addressable liquid crystal light valve 2.

[0030] The beam separation transmission mirror group includes: a dichroic mirror 3, a polarization beam splitter 4 and a reflector 5; a housing 11 is provided with an incident light window 8, a first exit light window 9 and a second exit light window 10, the incident light window 8 and the first exit light window 9 are relatively arranged on two opposite surfaces of the housing 11, and the second exit light window 10 is arranged below the first exit light window 9; a liquid crystal wave plate 1, a light-addressable liquid crystal light valve 2, a dichroic mirror 3 and a polarization beam splitter 4 are sequentially arranged between the incident light window 8 and the first exit light window 9 to form an optical path.

[0031] The reflector 5 is disposed below the polarization beam splitter 4 , and part of the light can be reflected by the polarization beam splitter 4 to form another optical path.

[0032] The light-addressable liquid crystal light valve 2 and the liquid crystal wave plate 1 are driven by an electric driver 6. An optical driver 7 is arranged under the dichroic mirror 3. The optical driver 7 emits blue addressing light with grayscale information toward the dichroic mirror 3, and is reflected by the dichroic mirror 3 to the light-addressable liquid crystal light valve 2.

[0033] The liquid crystal wave plate 1 is used to change the polarization state of light passing through it. The liquid crystal wave plate 1 changes the polarization direction of the light beam by changing the phase difference of the light.

[0034] The light-addressable liquid crystal light valve 2 is a controllable optical modulator, whose optical properties can be changed by applying electric field and optical field, thereby modulating the light beam passing through it. It is controlled by electric driver 6 and optical driver 7.

[0035] The dichroic mirror 3 is used to reflect the laser light emitted by the optical driver 7 onto the light-addressable liquid crystal light valve 2 .

[0036] The polarization beam splitter 4 is an optical element capable of separating a light beam according to the polarization state of the light. The polarization beam splitter 4 is used to separate the modulated light beam according to the polarization state and emit the light beam through the first light exit window 9 and the second light exit window 10 respectively.

[0037] The reflector 5 is used to reflect the light beam to change its direction. The reflector 5 is arranged below the polarization beam splitter 4 and is used to reflect the light beam that has not passed through the polarization beam splitter 4 to make it emerge from the second light exit window 10 .

[0038] The electric driver 6 can output square waves and sine waves of any proportion and frequency, with a maximum output voltage of 20V and a maximum number of simultaneous outputs of 6. The electric driver 6 applies a voltage signal to control the state of the light-addressable liquid crystal light valve 2, changing the phase, amplitude or polarization state of the light beam passing through the light valve.

[0039] The optical driver 7 is located below the dichroic mirror 3, and the blue addressing light with grayscale information is emitted toward the dichroic mirror 3, in order to realize the dynamic regulation and control of the optical path. The optical driver 7 can adjust the optically addressable liquid crystal light valve by emitting blue addressing light with grayscale information. The optical driver 7 can output signals in real time through HDMI, etc., or directly run according to a predetermined program through Type-C, etc. The optical driver 7 can independently control each pixel unit and generate light information with arbitrary energy distribution and arbitrary grayscale distribution. The minimum size of the generating unit can be 5 microns, and the maximum number of units in a single row / column can be 4K.

[0040] By emitting laser light of a specific wavelength and energy to the dichroic mirror 3, the excitation state of the light-addressable liquid crystal light valve 2 can be controlled, thereby modulating the laser pattern passing through the light valve. For example, different beam patterns and energy distributions can be generated to achieve complex optical pattern modulation.

[0041] The function of the electric driver 6 is to control and drive the state of the light-addressable liquid crystal light valve 2 to achieve modulation and control of the incident laser. The light-addressable liquid crystal light valve 2 is essentially a controllable optical modulator that changes its optical properties by applying voltage, thereby adjusting the phase, amplitude or polarization state of the incident laser. The electric driver 6 provides the necessary voltage and signal to activate and control the working state of the liquid crystal light valve.

[0042] The electric driver 6 controls the response speed and modulation effect of the liquid crystal light valve by adjusting the parameters of the voltage and signal (such as frequency and amplitude). When working in conjunction with the optical driver 7, the electric driver 6 controls the state of the liquid crystal light valve so that it can modulate the incident laser according to a preset pattern and energy distribution. By changing the drive signal, the electric driver 6 can adjust the transmission or reflection characteristics of the liquid crystal light valve to generate the desired laser pattern and energy distribution.

[0043] When the system is in the initial state, the electric driver 6 is not activated, the light-addressable liquid crystal light valve 2 is in the default state, and the incident laser is not modulated and is directly transmitted through the optical path. When the laser needs to be modulated, the electric driver 6 applies a voltage signal to the liquid crystal light valve to change its optical properties. The blue addressing light with grayscale information emitted by the optical driver 7 works together with the electrical signal of the electric driver 6 to make the liquid crystal light valve modulate the incident laser according to the set pattern and energy distribution, thereby realizing complex beam control.

[0044] The working principle is as follows: the laser beam enters the device from the incident light window 8, and first passes through the liquid crystal wave plate 1, which changes the polarization state of the light beam. The light beam with changed polarization state enters the light-addressable liquid crystal light valve 2, which modulates the light beam according to the set parameters under the control of the electric driver 6 and the optical driver 7. The modulated light beam passes through the dichroic mirror 3 and the polarization beam splitter 4, and the polarization beam splitter 4 separates the light beam into two light beams according to the polarization state of the light beam. One part of the light beam is emitted through the first exit light window 9, and the other part of the light beam is reflected by the reflector 5 and emitted through the second exit light window 10.

[0045] The device also includes a pattern monitoring component, which is a detector. The detector is arranged below the reflector and is used to receive the light with information that is leaked by the reflector, and monitor and feed back to the computer in real time.

[0046] The driving information of the electric driver 6 and the blue addressing light information with grayscale information emitted by the optical driver 7 are generated by corresponding algorithms, and the light intensity distribution through the reflector 5 can be collected by the detector 12 and fed back to the computer to correct the driving information in combination with the requirements of separating the light beams.

[0047] In the second embodiment, the first part of the laser light in the incident light is modulated into a horizontal or vertical polarization direction by a modulation component, and the second part of the laser light in the incident light is modulated into a vertical or horizontal polarization direction by a modulation component; the first part of the laser light is any specified part of the laser light or any specified energy laser light, and the second part of the laser light is the remaining part of the laser light in the incident light except the first part of the laser light.

[0048] The polarization beam splitter 4 is tilted between the first exit light window 9 and the dichroic mirror 3, and the reflector 5 is arranged below the polarization beam splitter 4; the first part of the laser light or the second part of the laser light that passes through the polarization beam splitter 4 is emitted from the first exit light window 9; the second part of the laser light or the first part of the laser light that does not pass through the polarization beam splitter 4 is reflected to the reflector 5, and then is reflected by the reflector 5 and emitted from the second exit light window 10.

[0049] The polarization beam splitter 4 is tiltedly arranged between the first exit light window 9 and the dichroic mirror 3, and is used to separate the modulated light beam according to the polarization state. A part of the light beam passes through the polarization beam splitter 4 and is emitted from the first exit light window 9; the other part of the light beam does not pass through the polarization beam splitter 4, but is reflected to the reflector 5 below, and the reflector 5 reflects the light beam that does not pass through the polarization beam splitter 4, so that it changes direction and is emitted from the second exit light window 10.

[0050] In order not to affect the original light path, the outgoing light of the first outgoing light window 9 and the outgoing light of the second outgoing light window 10 are set in parallel, and the outgoing light of the first outgoing light window 9 coincides with the incident light of the incident light window 8.

[0051] As a preference, the angle between the polarization beam splitter 4 and the incident light is 45 degrees, and the reflector 5 is arranged in parallel and directly below the polarization beam splitter 4 .

[0052] Embodiment 3, a method for using a polarization laser beam splitting device, based on the above polarization laser beam splitting device, the method for using includes: Step 1, device installation: place the device in the optical path, and make the incident light enter the incident light window 8 vertically, and make the outgoing light of the first exit light window 9 coincide with the light of the original optical path; Step 2, device adjustment: turn on and adjust the optical driver 7 and the electric driver 6, so that there is no laser output from the first exit light window 9; the laser is emitted through the second exit light window 10.

[0053] Step 3: Select to perform laser beam splitting operation: Laser beam splitting operations include: energy ratio beam splitting, pattern beam splitting, energy distribution beam splitting and laser shaping.

[0054] Energy ratio beam splitting: According to the set energy ratio, the laser beam is divided into two beams with different energy ratios.

[0055] Patterned beam splitting: Splits the laser beam into two beams with specific patterns according to the set pattern.

[0056] Energy distribution beam splitting: According to the set energy distribution, the laser beam is divided into two beams with different energy distributions.

[0057] Laser shaping: The laser beam is shaped into two beams of specific shapes according to the set shape.

[0058] Step 4, controlling the optical driver 7: controlling the optical driver 7 to emit addressing light with specific control information to the dichroic mirror 3 , and the dichroic mirror 3 reflects the addressing light to the optically addressed liquid crystal light valve 2 .

[0059] Step 5, light output: the modulated incident light is emitted through the first light exit window 9 and the second light exit window 10 .

[0060] By controlling the coordinated work of the optical driver 7 and the electrical driver 6, the state of the light-addressable liquid crystal light valve 2 is precisely adjusted so that the incident light is modulated and then split in a preset manner, thereby realizing operations such as energy proportional splitting, pattern splitting, energy distribution splitting and laser shaping.

[0061] Operation 1: The specific method of performing energy proportional beam splitting includes: Energy ratio setting: determine the energy ratio required for input; for example, it is set that 70% of the energy of the incident laser beam needs to pass through the first exit light window 9, and 30% of the energy needs to pass through the second exit light window 10.

[0062] Modulate the optical drive information: control the optical driver to emit the addressing light with uniform energy distribution to the dichroic mirror, and reflect it to the specified position of the optical addressing light valve; Adjust the light valve: the electric driver 6 adjusts the state of the light-addressable liquid crystal light valve 2 according to the set energy ratio, and polarization-modulates the incident light according to the energy ratio; under the control of the electric driver 6, the liquid crystal light valve modulates the polarization state of the incident light by changing the arrangement state of the liquid crystal molecules, thereby achieving proportional adjustment of the light beam energy.

[0063] Beam splitting result: a part of the laser light is emitted through the first exit light window 9, and the other part of the laser light is emitted through the second exit light window 10. The modulated incident laser beam is separated according to the set energy ratio. A part of the laser light is emitted through the first exit light window 9, and the other part of the laser light is emitted through the second exit light window 10, corresponding to the set energy ratios. For example, if the set ratio is 70% and 30%, 70% of the laser light passes through the first exit light window 9, and 30% of the laser light passes through the second exit light window 10.

[0064] Operation 2: The specific method of pattern beam splitting includes: Pattern Setting: Determine the desired laser pattern; for example, the laser beam can be set to form specific stripes, dots, or other complex patterns.

[0065] Modulate the optical drive information: control the optical driver to emit the patterned addressing light to the dichroic mirror, and reflect it to the specified position of the optical addressing light valve; Adjust the light valve: the electric driver 6 adjusts the state of the light-addressable liquid crystal light valve 2 according to the set pattern, and polarization-modulates the incident light according to the image; under the control of the electric driver 6, the liquid crystal light valve modulates the polarization state of the incident light by changing the arrangement state of the liquid crystal molecules, so that the light beam is modulated according to the set pattern.

[0066] Beam splitting result: the target pattern is emitted through the first light exit window 9, and its complementary pattern is emitted through the second light exit window. For example, if the set pattern is a stripe, the laser beam of the stripe pattern will be emitted from the first light exit window 9, and its complementary part will be emitted from the second light exit window 10.

[0067] Operation three, the specific method of performing energy distribution beam splitting includes: Energy distribution settings: Determine the desired energy distribution pattern; for example, the laser beam can be set to form a Gaussian distribution, uniform distribution, or other complex energy distribution patterns.

[0068] Modulate the optical drive information: control the optical driver to emit the addressing light with the energy distribution pattern to the dichroic mirror, and reflect it to the specified position of the optical addressing light valve; Adjust the light valve: the electric driver 6 adjusts the state of the light-addressable liquid crystal light valve 2 according to the set energy distribution, and polarization-modulates the incident light according to the energy distribution; the polarization state of the incident light is modulated by changing the arrangement state of the liquid crystal molecules, so that the light beam is modulated according to the set energy distribution.

[0069] Beam splitting result: the energy distribution pattern is emitted through the first exit light window 9, and its complementary energy distribution is emitted through the second exit light window. For example, if the set energy distribution is Gaussian distribution, the laser beam with Gaussian distribution will be emitted from the first exit light window 9, and its complementary part will be emitted from the second exit light window 10.

[0070] Operation 4: The specific methods for laser plastic surgery include: Shaping settings: Input the required laser shaping parameters through the computer interface. For example, the laser beam can be set to form a flat-top beam, Gaussian beam or other specific shapes.

[0071] Modulate the optical drive information: control the optical driver to emit the addressing light with shaping parameter information to the dichroic mirror, and reflect it to the specified position of the optical addressing light valve; Adjust the light valve: the electric driver 6 adjusts the state of the light-addressable liquid crystal light valve 2 according to the set shaping parameters, so that the laser is modulated according to the set shaping effect; the polarization state of the incident light is modulated by changing the arrangement state of the liquid crystal molecules, so that the light beam is modulated according to the set shaping effect.

[0072] Shaping result: The shaped laser is emitted through the first light exit window 9, and the unshaped laser is emitted through the second light exit window. For example, if the shaping effect is set to be a flat top beam, the flat top beam will be emitted from the first light exit window 9, and the unshaped part will be emitted from the second light exit window 10.

[0073] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A polarization laser beam splitting device, characterized in that: include: A housing (11), a beam modulation component, an optoelectronic dual drive component, and a beam separation transmission mirror assembly; The light beam modulation component comprises: a liquid crystal wave plate (1) and a light-addressable liquid crystal light valve (2), wherein the liquid crystal wave plate (1) and the light-addressable liquid crystal light valve (2) are arranged in close contact with each other and a light beam transmission liquid is inserted between them; The optoelectronic dual drive assembly comprises: an optical driver (7) and an electrical driver (6); The light beam separation transmission mirror group comprises: a dichroic mirror (3), a polarization beam splitter (4) and a reflector (5); The housing (11) is provided with an incident light window (8), a first exit light window (9) and a second exit light window (10); the incident light window (8) and the first exit light window (9) are arranged on two opposite surfaces of the housing (11), and the second exit light window (10) is arranged below the first exit light window (9); The liquid crystal wave plate (1), the light-addressable liquid crystal light valve (2), the dichroic mirror (3) and the polarization beam splitter (4) are arranged in sequence between the incident light window (8) and the first exit light window (9); the reflector (5) is arranged below the polarization beam splitter (4); The light-addressable liquid crystal light valve (2) and the liquid crystal wave plate (1) are driven by the electric driver (6); the light driver (7) is arranged below the dichroic mirror (3); the light driver (7) emits blue addressing light with grayscale information toward the dichroic mirror (3), and is reflected by the dichroic mirror (3) to the light-addressable liquid crystal light valve (2).

2. A polarization laser beam splitting device according to claim 1, characterized in that: It also comprises a pattern monitoring component, which is a detector (12). The detector (12) is arranged below the reflector (5) and is used to receive light with information leaked by the reflector (5), and monitor and feed back to a computer in real time.

3. A polarization laser beam splitting device according to claim 1, characterized in that: The liquid crystal wave plate (1) and the light-addressable liquid crystal light valve (2) are perpendicular to the incident light, the first part of the laser light in the incident light is modulated into a horizontal or vertical polarization direction by the light beam modulation component, and the second part of the laser light in the incident light is modulated into a vertical or horizontal polarization direction by the light beam modulation component; The first portion of laser light is any specified portion of laser light or any specified energy laser light, and the second portion of laser light is the remaining portion of laser light in the incident light except the first portion of laser light.

4. A polarization laser beam splitting device according to claim 3, characterized in that: The polarization beam splitter (4) is arranged obliquely between the first exit light window (9) and the dichroic mirror (3), and the reflector (5) is arranged below the polarization beam splitter (4); The first portion of laser light or the second portion of laser light that passes through the polarization beam splitter (4) is emitted from the first light exit window (9); After the second portion of laser light or the first portion of laser light that has not passed through the polarization beam splitter (4) is reflected to the reflector (5), it is reflected by the reflector (5) and then emitted from the second light exit window (10).

5. A polarization laser beam splitting device according to claim 4, characterized in that: The outgoing light of the first outgoing light window (9) and the outgoing light of the second outgoing light window (10) are arranged in parallel, and the outgoing light of the first outgoing light window (9) coincides with the incident light of the incident light window (8); The angle between the polarization beam splitter (4) and the incident light is 45 degrees, and the reflector (5) is arranged in parallel and directly below the polarization beam splitter (4).

6. A method for using a polarization laser beam splitting device, characterized in that: Based on a polarization laser beam splitting device as described in any one of claims 1 to 5, the method of using comprises: The device is placed in the optical path, and the incident light enters the incident light window (8) vertically, and the outgoing light from the first outgoing light window (9) is made to coincide with the light of the original optical path; the liquid crystal wave plate (1) is adjusted by the electric driver (6) so that no laser is emitted from the second outgoing light window (10); Turning on and adjusting the optical driver (7) and the electrical driver (6) so that no laser light is emitted from the first light exit window (9); and the laser light is emitted from the second light exit window (10); Selecting to perform laser beam splitting operations, the laser beam splitting operations include: energy ratio beam splitting, pattern beam splitting, energy distribution beam splitting and laser shaping; Controlling the optical driver (7) to emit addressing light of specific wavelength and energy to the dichroic mirror (3), the dichroic mirror (3) reflects the addressing light to the optically addressed liquid crystal light valve (2), and the electrical driver (6) applies a voltage signal to control the state of the optically addressed liquid crystal light valve (2), thereby modulating the incident light; The modulated incident light is emitted through the first light exit window (9) and the second light exit window (10).

7. The method for using the polarization laser beam splitting device according to claim 6, characterized in that: Specific methods for performing energy proportional beam splitting include: Energy ratio setting: determine the energy ratio required for input; Modulating the optical drive information: controlling the optical driver (7) to emit the addressing light with uniform energy distribution to the dichroic mirror (3); Adjusting the light valve: the electric driver (6) adjusts the state of the light-addressable liquid crystal light valve (2) according to the set energy ratio, and performs polarization modulation on the incident light according to the energy ratio; Beam splitting result: a portion of the laser light is emitted through the first light exit window (9), and another portion of the laser light is emitted through the second light exit window (10).

8. The method for using a polarization laser beam splitting device according to claim 6, characterized in that: Specific methods for pattern beam splitting include: Pattern setting: determine the desired laser pattern; Modulating the optical drive information: controlling the optical driver (7) to emit the addressing light with the pattern to the dichroic mirror (3); Beam splitting result: the target pattern is emitted through the first exit light window (9), and its complementary pattern is emitted through the second exit light window (10).

9. The method for using a polarization laser beam splitting device according to claim 6, characterized in that: Specific methods for performing energy distribution beam splitting include: Energy distribution settings: determine the desired energy distribution pattern; Modulating the optical drive information: controlling the optical driver (7) to emit addressing light with an energy distribution pattern to the dichroic mirror (3); Beam splitting result: the energy distribution pattern is emitted through the first exit light window (9), and its complementary energy distribution is emitted through the second exit light window (10).

10. The method for using a polarization laser beam splitting device according to claim 6, characterized in that: Specific methods of laser plastic surgery include: Shaping settings: Input the required laser shaping parameters through the computer interface; Modulating the optical drive information: controlling the optical driver (7) to emit the addressing light with the shaping parameter information to the dichroic mirror (3); Shaping result: the shaped laser light is emitted through the first light exit window (9), and the unshaped laser light is emitted through the second light exit window (10).

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