Mechanical optical pulse modulator and modulation method

Abstract

The invention provides a mechanical optical pulse modulator and a modulation method. The mechanical optical pulse modulator includes: a light source; a motor flywheel; the wedge-shaped mirror is arranged on the outer edge of the motor flywheel, and the wedge-shaped mirror is configured to reflect light emitted by the light source under the condition that the wedge-shaped mirror rotates to be located on the same straight line with the circle center of the motor flywheel and the light source and faces the light source; the micro reflecting mirror is located in the emergent direction of the reflected light of the wedge-shaped mirror and used for reflecting the light reflected by the wedge-shaped mirror, the micro reflecting mirror comprises a light reflecting part and a light absorbing part, and the light absorbing part is used for absorbing the light around the light reflecting part. According to the mechanical optical pulse modulator provided by the invention, the problems of high cost and complicated adjustment method of optical pulse modulation equipment in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the field of pulse laser modulation, and in particular to a mechanical optical pulse modulator and a modulation method. Background Art

[0002] Laser pulse sources can be used to measure the time constant of photodetectors. For detectors with larger time constants (milliseconds), a mechanical chopper with a smaller modulation frequency can be used for measurement. For fast-response photovoltaic infrared detectors (nanoseconds), a nanosecond laser pulse source is required for measurement.

[0003] Existing laser pulse sources usually use photoelectric modulation to generate ultrashort light pulses. However, the principle is relatively complicated, the modulation method is not flexible and convenient enough, and the equipment is usually very expensive, which is not suitable for routine testing of infrared detectors. Summary of the invention

[0004] In view of this, the embodiments of the present application are directed to providing a mechanical optical pulse modulator and a modulation method to solve the problems of high cost and complex modulation process of optical pulse modulation devices in the prior art.

[0005] On the one hand, the present application provides a mechanical optical pulse modulator, comprising: a light source; a motor flywheel; at least one wedge-shaped mirror, which is arranged on the outer edge of the motor flywheel, and the wedge-shaped mirror is configured to reflect the light emitted by the light source when the wedge-shaped mirror is rotated to be located in the same straight line as the center of the motor flywheel and the light source and faces the light source; a micro-reflector, which is located in the reflected light emission direction of the wedge-shaped mirror and is used to reflect the light reflected by the wedge-shaped mirror, wherein the micro-reflector includes a light reflecting component and a light absorbing component, and the light absorbing component is used to absorb the light around the light reflecting component.

[0006] In combination with the first aspect, in certain implementations of the first aspect, the mechanical optical pulse modulator provided in this embodiment further includes: a first movable control device, fixedly connected to the micro-reflector, for controlling the movement of the micro-reflector in a direction perpendicular to the horizontal plane.

[0007] In combination with the first aspect, in some implementations of the first aspect, the first movable control device includes: a first piezoelectric ceramic fixedly connected to the micro-reflector and used to adjust the movement of the micro-reflector in a direction perpendicular to the horizontal plane.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the repetition frequency of the optical pulses of the mechanical pulse modulator is determined based on at least one of the following: a periodic movement frequency of the first movable control device; and the number of wedge mirrors.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the pulse width of the light pulse of the mechanical pulse modulator is determined based on at least one of the following: the distance from the axis of the motor flywheel to the micro-reflector; the rotational angular velocity of the motor flywheel; the width of the light reflecting component.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the mechanical optical pulse modulator provided in this embodiment also includes: at least one second movable control device, which is arranged on the outer edge of the motor flywheel and is used to adjust the angle of at least one wedge-shaped mirror and the position relative to the motor flywheel, wherein the wedge-shaped mirror is arranged on the second movable control device, and the at least one second movable control device corresponds to the at least one wedge-shaped mirror one by one.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the second movable control device includes: a second piezoelectric ceramic fixedly connected to the wedge mirror and used to adjust the angle of the wedge mirror and the position relative to the motor flywheel.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the mechanical optical pulse modulator provided in this embodiment also includes: a first converging lens, aligned with the center of the light source, located between the light source and the motor flywheel, and used to converge the light from the light source; an optical path control device, located in the light emitting direction of the micro-reflector, and used to change the propagation direction of the light emitted by the micro-reflector; a second converging lens, located in the light emitting direction of the optical path control device, and used to collect and output the light emitted by the optical path control device.

[0013] In a second aspect, the present application also provides a mechanical optical pulse modulation method, which is applied to the mechanical optical pulse modulator provided in the above embodiment, and the method includes: generating a light to be modulated by a light source; reflecting the light to be modulated to a micro-reflector by at least one wedge-shaped mirror arranged on a motor flywheel to form a first output light, so that the first output light is reflected by the micro-reflector to form a light pulse.

[0014] In combination with the second aspect, in certain implementations of the first aspect, the mechanical optical pulse modulation method provided in this embodiment also includes at least one of the following steps: adjusting the rotational angular velocity of the motor flywheel to adjust the width of the light pulse; adjusting the distance from the axis of the motor flywheel to the micro-reflector to adjust the width of the light pulse; adjusting the periodic movement frequency of the micro-reflector to adjust the repetition frequency of the light pulse; adjusting the number of wedge-shaped mirrors to adjust the repetition frequency of the light pulse.

[0015] The mechanical optical pulse modulator and modulation method provided in the embodiment of the present application can achieve a sub-microsecond optical pulse width. It is easy to operate, has a simple structure and is easy to build, and is easy to replace any parts to facilitate the maintenance of the equipment. At the same time, it is highly practical and can replace the expensive sub-microsecond laser pulse equipment on the market for related experiments or tests. It solves the problems of high cost and complex modulation process of optical pulse modulation equipment in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The embodiments of the present application will be described in more detail below in conjunction with the accompanying drawings, and the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0017] Figure 1 Shown is a schematic structural diagram of a single wedge-shaped mirror mechanical optical pulse modulator provided in an embodiment of the present application.

[0018] Figure 2 Shown Figure 1 Schematic diagram of the structure of the micro-mirror in the single wedge-shaped mirror mechanical optical pulse modulator shown in FIG.

[0019] Figure 3 Shown is a schematic structural diagram of a multi-wedge mirror mechanical optical pulse modulator provided in one embodiment of the present application.

[0020] Figure 4 Shown Figure 1 Schematic diagram of the structure of the motor flywheel assembly in the single wedge mirror mechanical optical pulse modulator shown.

[0021] Figure 5 FIG. 1 is a flow chart of a mechanical optical pulse modulation method provided in an embodiment of the present application.

[0022] Figure 6 FIG. 4 is a flow chart of a mechanical optical pulse modulation method provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Application Overview

[0025] The basic concept of the present application is to propose a mechanical optical pulse modulator and a modulation method to solve the problems of high cost and complex modulation process of optical pulse modulation devices in the prior art.

[0026] The mechanical optical pulse modulator provided by the present application includes: a light source; a motor flywheel; at least one wedge-shaped mirror, which is arranged on the outer edge of the motor flywheel, and the wedge-shaped mirror is configured to reflect the light emitted by the light source when the wedge-shaped mirror is rotated to be located in the same straight line as the center of the motor flywheel and the light source and faces the light source; a micro-reflector, which is located in the reflected light emission direction of the wedge-shaped mirror and is used to reflect the light reflected by the wedge-shaped mirror, wherein the micro-reflector includes a light reflecting component and a light absorbing component, and the light absorbing component is used to absorb the light around the light reflecting component.

[0027] The mechanical optical pulse modulation method provided in the present application includes: generating light to be modulated by a light source; reflecting the light to be modulated to a micro-reflector by at least one wedge-shaped mirror arranged on a motor flywheel to form a first output light, so that the first output light is reflected by the micro-reflector to form a light pulse.

[0028] Various non-limiting embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described herein.

[0029] Exemplary Devices

[0030] Figure 1 Shown is a schematic structural diagram of a single wedge-shaped mirror mechanical optical pulse modulator provided in an embodiment of the present application. Figure 2 Shown Figure 1 Schematic diagram of the structure of the micro-mirror in the single wedge-shaped mirror mechanical optical pulse modulator shown in FIG.

[0031] like Figure 1 and Figure 2 As shown, the single wedge-shaped mirror mechanical optical pulse modulator provided in this embodiment includes: a light source 13; a motor flywheel 1; a wedge-shaped mirror 5, which is arranged on the outer edge of the motor flywheel 1, and the wedge-shaped mirror 5 is configured to reflect the light emitted by the light source 13 when the wedge-shaped mirror 5 is rotated to be located in the same straight line with the center of the motor flywheel 1 and the light source 13 and facing the light source 13; a micro-reflector 9, which is located in the reflected light emission direction of the wedge-shaped mirror 5, and is used to reflect the light reflected by the wedge-shaped mirror 5, wherein the micro-reflector 9 includes a light reflecting component 92 and a light absorbing component 91, and the light absorbing component 91 is used to absorb the light around the light reflecting component 92.

[0032] Preferably, the single wedge-shaped mirror mechanical optical pulse modulator provided in this embodiment further includes: a shielding box 12 for isolating the device from possible interference caused by external ambient light.

[0033] like Figure 1 As shown, a power button battery pack is also installed at the axis of the upper surface of the cylindrical motor flywheel 1 to power the electric flywheel. It is understandable that other types of battery components, mobile power supplies or fixed power supplies can also be used to power the electric flywheel 1, and this application does not limit this.

[0034] According to the single wedge mirror mechanical optical pulse modulator provided in this embodiment, specifically, the distance from the axis of the motor flywheel 1 to the micro-reflector 9 is R, the rotation speed of the motor flywheel 1 is n, the corresponding rotation angular velocity is ω, the number of wedge mirrors 5 is N=1, and the width of the light reflecting part of the micro-reflector 9 is d; when the motor flywheel 1 is started, the light emitted by the light source 13 is reflected by the wedge mirror 5 and the micro-reflector 9, and the duration of the light pulse generated is:

[0035] Δt=d / ωR (1)

[0036] It can be seen from formula (1) that the pulse width of the light pulse, i.e., Δt, is determined by the distance R from the axis of the motor flywheel 1 to the micro-reflector 9, the rotational angular velocity ω of the motor flywheel 1, and the width d of the light reflecting component of the micro-reflector 9, and the light pulse width can be adjusted by adjusting any one of them.

[0037] The repetition frequency of the light pulse is:

[0038] F=Nω / 2π (2)

[0039] It can be seen from formula (2) that the repetition frequency of the light pulse, i.e., F, is determined by the rotational angular velocity ω of the motor flywheel 1 and the number N of the wedge mirrors 5. By changing the number of wedge mirrors 5, the repetition frequency of the light pulse can be controlled to increase by multiples. Alternatively, by changing the rotational angular velocity ω of the motor flywheel 1, the repetition frequency of the light pulse can also be adjusted.

[0040] Exemplarily, the light reflecting part 92 of the micro-reflector 9 is a Cr / Au rectangular coating with a width d of 31.4 μm, and the light absorbing part 91 is a black paint absorbing coating around the coating. When light is directed to the light absorbing part 91, no reflected light is generated. Therefore, when light passes over the micro-reflector 9, reflected light is formed only when it passes over the light reflecting part 92, thereby forming a light pulse. It is understood that the light absorbing part 91 can be made of any material that can completely absorb light directed to its surface, and the present application does not limit this.

[0041] Exemplarily, when the distance from the axis of the motor flywheel 1 to the micro-reflector 9 is R = 10 cm, the rotation speed of the motor flywheel 1 is n = 1r / s, that is, the angular velocity of rotation is ω = 2πrad / s, the number of wedge mirrors 5 is N = 1, and the width of the light reflecting part of the micro-reflector 9 is d = 31.4μm; the duration of the light pulse is: Δt = 50μs, and the repetition frequency of the light pulse is: F = 1Hz.

[0042] By adjusting the distance R from the axis of the motor flywheel 1 to the micro-reflector 9 in the single wedge-shaped mirror mechanical optical pulse modulator, the rotation speed n of the motor flywheel 1, and the width d of the light reflecting part of the micro-reflector 9, the pulse width of the optical pulse can be adjusted. As can be seen from the above, when the rotation speed of the motor flywheel 1 is low, the duration of the corresponding optical pulse is in the microsecond level, that is, an optical pulse with a pulse width of the microsecond level can be formed, and the repetition frequency is also low. This working mode is suitable for the determination of the time constant of a photothermal detector with a slow response speed (time constant of the order of ms).

[0043] Figure 3 FIG. 1 is a schematic diagram of the structure of a multi-wedge mirror mechanical optical pulse modulator provided by an embodiment of the present application. Figure 3 As shown, the number N of wedge mirrors in the structure of the multi-wedge mirror mechanical optical pulse modulator provided by the present application is greater than or equal to 2. The multi-wedge mirror mechanical optical pulse modulator provided by this embodiment includes: a light source 13; a motor flywheel 1; 16 wedge mirrors 5, which are evenly spaced and arranged on the outer edge of the motor flywheel, and the wedge mirrors 5 are configured to reflect the light emitted by the light source 13 when the wedge mirrors 5 are rotated to be in the same straight line with the center of the motor flywheel 1 and the light source 13 and facing the light source 13; a micro-reflector 9, which is located in the reflected light emitting direction of the wedge mirror 5, and is used to reflect the light reflected by the wedge mirror 5, wherein the micro-reflector 9 includes a light reflecting component 92 and a light absorbing component 91, and the light absorbing component 91 is used to absorb the light around the light reflecting component 92.

[0044] For example, when the distance from the axis of the motor flywheel 1 to the micro-reflector 9 is R=10 cm, the rotation speed of the motor flywheel 1 is n=160 r / s, that is, the angular velocity is ω=320πrad / s, the number of wedge mirrors 5 is N=16, and the width of the light reflecting part of the micro-reflector 9 is d=31.4 μm, according to formula (1) and formula (2), the duration of the light pulse is Δt=312.5 ns, and the repetition frequency of the light pulse is: F=2560 Hz.

[0045] From the above, it can be seen that when the speed of the motor flywheel 1 is high, the duration of the corresponding light pulse is sub-microsecond, that is, a light pulse with a pulse width of sub-microsecond can be formed, and the repetition frequency can reach thousands of hertz. This working mode is suitable for the measurement of the time constant of photoelectric detectors with a faster response speed (time constant of microsecond order).

[0046] The mechanical optical pulse modulator provided in the embodiment of the present application can quickly change the pulse width of the optical pulse by single or combined adjustment, that is, by adjusting the rotation speed of the motor flywheel, the distance from the axis of the motor flywheel to the micro-reflector, and the width of the optical reflective component. It is easy to operate, simple in structure, easy to build, and easy to replace any parts to facilitate the maintenance of the equipment. At the same time, it is highly practical and can replace the expensive sub-microsecond laser pulse equipment on the market for related experiments or tests.

[0047] In addition, the mechanical optical pulse modulator provided in the embodiment of the present application can also adjust the repetition frequency of the optical pulse through a single type of adjustment or a combined type of adjustment, that is, by adjusting the speed of the motor flywheel and / or controlling the number of wedge mirrors, so as to adapt to different types of tests and experimental requirements.

[0048] Preferably, the mechanical optical pulse modulator provided in an embodiment of the present application further includes: a first movable control device 6, which is fixedly connected to the micro-reflector 9 and is used to control the movement of the micro-reflector 9 in a direction perpendicular to the horizontal plane.

[0049] Specifically, when the speed of the motor flywheel 1 is n, correspondingly, when the angular velocity of rotation is ω, and the number of wedge mirrors 5 is N, at this time, the repetition frequency of the light pulse generated by the mechanical optical pulse modulator provided by the present application is F=Nω / 2π, and the period is T=1 / F, that is, T=2π / Nω. It can be seen that the number of times the light scans the micro-mirror in one second is F times. In the first period, after the reflected light just scans the micro-mirror 9, the micro-mirror 9 is controlled to move downward so that the reflected light spot cannot irradiate the light reflecting part of the micro-mirror 9; in the Mth period, the micro-mirror 9 is controlled to move back to the original position, and the repetition frequency of the light pulse at this time will become F / M, that is, F=Nω / M2π, where M is a positive integer.

[0050] Exemplarily, when the speed of the motor flywheel 1 is n=1, correspondingly, the angular velocity of rotation is ω=2πrad / s, and when the number of wedge mirrors 5 is N=1, the repetition frequency of the light pulse is F=1Hz. When M=10, that is, in the first cycle, after the reflected light just passes over the micro-reflector 9, the micro-reflector 9 is controlled to move downward so that the reflected light spot cannot irradiate the light reflecting component of the micro-reflector 9; in the Mth cycle, that is, the 10th cycle, the micro-reflector 9 is controlled to move back to the original position. The repetition frequency at this time will become F / M, that is, F=0.1Hz. In other words, by controlling the periodic movement frequency of the first movable control device 6, the repetition frequency of the light pulse of the mechanical pulse modulator can be adjusted.

[0051] Preferably, the first movable control device 6 includes a first piezoelectric ceramic, and the displacement of the first piezoelectric ceramic can be changed by controlling the voltage of the first piezoelectric ceramic, thereby controlling the movement of the micro-reflector 9 in a direction perpendicular to the horizontal direction.

[0052] Preferably, if Figure 2 As shown, the micro-reflector 9 is mounted on the side surface of the right-angle frame 11 and then mounted on the first movable control device 6.

[0053] The mechanical optical pulse modulator provided in the embodiment of the present application can adjust the repetition frequency of the optical pulse to an integer multiple by controlling the movement of the micro-reflector in a direction perpendicular to the horizontal plane.

[0054] Figure 4 Shown Figure 1 The schematic diagram of the structure of the motor flywheel assembly in the single wedge mirror mechanical optical pulse modulator is shown in FIG. Figure 4 As shown, in one embodiment, the mechanical optical pulse modulator provided by the present application also includes: at least one second movable control device 15, which is arranged on the outer edge of the motor flywheel, and is used to adjust the angle of at least one wedge-shaped mirror 5 and the position relative to the motor flywheel 1, wherein the wedge-shaped mirror 5 is arranged on the second movable control device 15, and at least one second movable control device 15 corresponds to at least one wedge-shaped mirror 5 one by one.

[0055] The mechanical optical pulse modulator provided in the embodiment of the present application can fine-tune the position of the corresponding wedge-shaped mirror by adjusting the second movable control device to ensure the consistency of the optical pulses formed by the multiple wedge-shaped mirrors when the mechanical optical pulse modulator is configured with multiple wedge-shaped mirrors.

[0056] Preferably, the second movable control device 15 comprises a second piezoelectric ceramic, which is fixedly connected to the wedge mirror 5 and is used to adjust the angle of the wedge mirror 5 and the position relative to the motor flywheel 1 .

[0057] For example, Figure 4 As shown, adjustable resistors 3 and level control chips 4 for controlling piezoelectric ceramics are symmetrically installed on both sides of the motor flywheel 1; the combination of the wedge mirror 5 and the second piezoelectric ceramic is on the side surface of the flywheel, and the counterweight 7 is on the other side of the axis. The level control chip 4 is used to adjust the voltage of the second piezoelectric ceramic, and then control the extension and contraction degree of the second piezoelectric ceramic to fine-tune the position of each wedge mirror 5. It can be understood that the voltage of the second piezoelectric ceramic can also be adjusted by other types of electronic devices, and this application does not limit this.

[0058] Preferably, if Figure 1As shown, in one embodiment, the mechanical optical pulse modulator provided by the present application also includes: a first converging lens 8, aligned with the center of the light source 13, located between the light source 13 and the motor flywheel 1, and used to converge the light from the light source 13; an optical path control device 10, located in the light emission direction of the micro-reflector 9, and used to change the propagation direction of the light emitted by the micro-reflector 9; a second converging lens 14, located in the light emission direction of the optical path control device 10, and used to collect and output the light emitted by the optical path control device 10.

[0059] Specifically, the first focusing lens 8 converges the light, the combination consisting of the first movable control device 6, the right-angle frame 11, and the micro-reflector 9 reflects the light reflected by the wedge mirror 5 to the optical path control device 10, and the second focusing lens 14 collects the modulated light for output.

[0060] The mechanical optical pulse modulator provided in the embodiment of the present application can further converge the optical pulse light through a converging lens, and change the propagation direction of the light through an optical path control device, thereby saving the space occupied by the equipment.

[0061] Exemplary Methods

[0062] Figure 5 FIG. 1 is a mechanical optical pulse modulation method provided in an embodiment of the present application, which is applied to the mechanical optical pulse modulator provided in the above embodiment. Figure 5 As shown, the modulation method of mechanical optical pulses includes the following steps:

[0063] S100: Generate light to be modulated by a light source.

[0064] S200: Reflecting the light to be modulated to the micro-reflector through at least one wedge-shaped mirror arranged on the motor flywheel to form a first output light, so that the first output light is reflected by the micro-reflector to form a light pulse.

[0065] The mechanical optical pulse modulation method provided in the embodiment of the present application forms an optical path that is easy to adjust, and the pulse width of the optical pulse can be modulated by adjusting the rotation speed of the motor flywheel and the relative positions of each component. Therefore, the modulation method is easy to operate and the pulse width of the optical pulse can be modulated quickly.

[0066] Figure 6 FIG. 1 is a flow chart of a mechanical optical pulse modulation method provided in another embodiment of the present application, which is applied to the mechanical optical pulse modulator provided in the above embodiment. Figure 5 Based on the embodiment shown, Figure 6 The embodiment shown is described below in detail. Figure 6 The embodiment shown and Figure 5 The differences and similarities of the illustrated embodiments are not described in detail.

[0067] like Figure 6 As shown, the modulation method of mechanical optical pulses also includes at least one of the following steps:

[0068] S300: Adjust the rotational angular velocity of the motor flywheel to adjust the width of the light pulse.

[0069] S400: Adjust the distance from the axis of the motor flywheel to the micro-reflector to adjust the width of the light pulse.

[0070] S500: Adjusting the periodic movement frequency of the micro-mirror to adjust the repetition frequency of the light pulse.

[0071] S600: Adjust the number of wedge mirrors to adjust the repetition frequency of the light pulse.

[0072] Specifically, when the distance from the motor flywheel axis to the micro-reflector is R, the motor flywheel speed is n, the corresponding rotational angular velocity is ω, the number of wedge mirrors N=1, and the width of the light reflecting part of the micro-reflector is d; when the motor flywheel is started, the light emitted by the light source is reflected by the wedge mirror and the micro-reflector, and the duration of the light pulse generated is: Δt=d / ωR. The repetition frequency of the light pulse is: F=Nω / 2π.

[0073] As can be seen from the above, the pulse width of the light pulse, Δt, is determined by the distance R from the motor flywheel axis to the micro-reflector, the rotational angular velocity ω of the motor flywheel, and the width of the light reflecting component of the micro-reflector, and the light pulse width can be adjusted by adjusting any one of them. The repetition frequency of the light pulse, F, is determined by the rotational angular velocity ω of the motor flywheel and the number of wedge mirrors N. By changing the number of wedge mirrors, the repetition frequency of the light pulse can be controlled to increase by multiples.

[0074] The mechanical optical pulse modulation method provided in the embodiment of the present application can quickly change the pulse width of the optical pulse by single or combined adjustment, that is, by adjusting the rotation speed of the motor flywheel, the distance from the axis of the motor flywheel to the micro-reflector, and the width of the optical reflective component. It is easy to operate, simple in structure, easy to build, and easy to replace any parts to facilitate the maintenance of the equipment. At the same time, it can replace the expensive sub-microsecond laser pulse equipment on the market for related experiments or tests.

[0075] It can be understood that in the various implementations of this specification, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation methods of this specification.

[0076] It should be understood that the specific examples herein are only intended to help those skilled in the art to better understand the embodiments of the present specification, rather than to limit the scope of the present invention.

[0077] It can be understood that the various embodiments described in this specification can be implemented individually or in combination, and the embodiments of this specification are not limited to this.

[0078] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method implementation methods and will not be repeated here.

[0079] In the several embodiments provided in this specification, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device implementation described above is only schematic. For example, the division of the components is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The units described as separate components may or may not be physically separated, and some or all of the units may be selected according to actual needs to achieve the purpose of this implementation scheme.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical optical pulse modulator, characterized in that: include: light source; Motor flywheel; At least one wedge-shaped mirror is disposed on the outer edge of the motor flywheel, and the wedge-shaped mirror is configured to reflect the light emitted by the light source when the wedge-shaped mirror is rotated to be located on the same straight line as the center of the motor flywheel and the light source and faces the light source; The micro-reflector is located in the reflected light emission direction of the wedge-shaped mirror and is used to reflect the light reflected by the wedge-shaped mirror. The micro-reflector includes a light reflecting component and a light absorbing component, and the light absorbing component is used to absorb the light around the light reflecting component.

2. The mechanical optical pulse modulator according to claim 1, characterized in that: Also includes: The first movable control device is fixedly connected to the micro-reflector and is used for controlling the movement of the micro-reflector in a direction perpendicular to the horizontal plane.

3. The mechanical optical pulse modulator according to claim 2, characterized in that: The first movable control device comprises: The first piezoelectric ceramic is fixedly connected to the micro-reflector and is used to adjust the movement of the micro-reflector in a direction perpendicular to the horizontal plane.

4. The mechanical optical pulse modulator according to claim 2, characterized in that: The repetition frequency of the optical pulses of the mechanical pulse modulator is determined based on at least one of the following: a periodic movement frequency of the first movable control device; The number of the wedge-shaped mirrors.

5. The mechanical optical pulse modulator according to claim 1, wherein: The pulse width of the optical pulse of the mechanical pulse modulator is determined based on at least one of the following: The distance from the axis of the motor flywheel to the micro-reflector; The rotational angular velocity of the motor flywheel; The width of the light reflecting member.

6. The mechanical optical pulse modulator according to claim 1, characterized in that: Also includes: At least one second movable control device is arranged on the outer edge of the motor flywheel, and is used to adjust the angle of the at least one wedge-shaped mirror and the position relative to the motor flywheel, wherein the wedge-shaped mirror is arranged on the second movable control device, and the at least one second movable control device corresponds to the at least one wedge-shaped mirror one by one.

7. The mechanical optical pulse modulator according to claim 6, characterized in that: The second movable control device comprises: The second piezoelectric ceramic is fixedly connected to the wedge-shaped mirror and is used to adjust the angle of the wedge-shaped mirror and the position relative to the motor flywheel.

8. The mechanical optical pulse modulator according to claim 1, characterized in that: Also includes: A first converging lens, aligned with the center of the light source, located between the light source and the motor flywheel, for converging the light from the light source; An optical path control device, located in the light emission direction of the micro-reflector, and used to change the propagation direction of the light emitted by the micro-reflector; The second converging lens is located in the light emitting direction of the light path control device, and is used for collecting and outputting the light emitted by the light path control device.

9. A method for modulating a mechanical optical pulse, characterized in that: A mechanical optical pulse modulator as claimed in claims 1 to 8; Wherein, the method comprises: generating light to be modulated by a light source; The light to be modulated is reflected to a micro-reflector by at least one wedge-shaped mirror arranged on the motor flywheel to form a first output light, so that the first output light is reflected by the micro-reflector to form a light pulse.

10. The mechanical optical pulse modulation method according to claim 9, further comprising at least one of the following steps: Adjusting the rotational angular velocity of the motor flywheel to adjust the width of the light pulse; Adjusting the distance from the axis of the motor flywheel to the micro-reflector to adjust the width of the light pulse; Adjusting the periodic movement frequency of the micro-reflector to adjust the repetition frequency of the light pulse; The number of the wedge-shaped mirrors is adjusted to adjust the repetition frequency of the light pulses.

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