Anti-shake testing device and anti-shake testing method of optical image stabilizer

Abstract

The application provides a device and method for testing the anti-shake of an optical image stabilizer, wherein the device for testing the anti-shake of the optical image stabilizer comprises a clamp, a motor fixed on the clamp, a lens simulator installed on the motor, an optical image stabilizer connected with the motor and driving the motor to push the lens simulator to move, and at least one laser range finder capable of measuring the distance between the lens simulator by laser. Compared with the prior art, the application uses laser ranging instead of the original image judgment mode, does not need to wait for the debugging of the image sensor, and does not need to build the whole photographing system, thereby saving a large amount of resources. In addition, the restriction of the vibration table is removed, and the application can test the compensation rate of any angle combination of two axes.

Description

[0001] The present application relates to the technical field of anti-shake testing of optical image stabilizers, and particularly relates to an anti-shake testing device and an anti-shake testing method of an optical image stabilizer.

[0002] The function of optical anti-shake technology is to avoid picture blur caused by hand shaking and other factors during shooting, thereby improving the clarity of imaging. The main principle is to add a movable part driven by magnetic force in the lens group. When shaking occurs, the shaking angle is detected by a gyroscope, which is converted into the stroke that needs to be compensated by the lens. The current is changed to drive the lens to the corresponding position, so as to minimize the deflection of the light path, thereby achieving the purpose of compensation. In most cases, the compensation position generally requires the center of the lens to be pushed to the center position near the undisturbed center to ensure the final imaging effect. The existing detection scheme generally installs the shooting system on a vibration table, sets the amplitude and frequency of shaking, and takes pictures before and after the anti-shake system is turned on. The compensation ratio of the anti-shake system is judged by comparing the pictures before and after the anti-shake system is turned on. This scheme requires the motor to wait for the image sensor to be debugged before the entire shooting system can be built and debugged. The construction and debugging of the shooting system require a large amount of resources, and the image sensor debugging also requires time and cooperation with other manufacturers.

[0003] In addition, since the shooting system is installed on the vibration table, the position of the shooting system relative to the vibration table is relatively constant, so that only a single axis or a specific angle of two axes can be tested in one test, and the compensation ratio of two axes at any angle cannot be tested.

[0004] Therefore, there is an urgent need to propose a new technical solution to solve the above problems.

[0005] One of the purposes of the present application is to provide an anti-shake testing device and an anti-shake testing method of an optical image stabilizer, which removes the vibration table, uses simulated shaking data and laser ranging to measure the actual displacement of the lens, and then calculates the compensation ratio of the anti-shake, without the need for a shooting system and an image sensor, thereby saving a large amount of resources and improving the efficiency of the entire system debugging. In addition, after removing the vibration table, the present application can test the compensation ratio of two axes at any angle without limitation.

[0006] According to one aspect of the present application, the present application provides an anti-shake testing device of an optical image stabilizer, which comprises: a clamp; a motor fixed on the clamp; a lens simulator installed on the motor; an optical image stabilizer connected with the motor and driving the motor to push the lens simulator to move; and at least one laser range finder capable of measuring the distance between the laser range finder and the lens simulator by laser.​​​

[0007] According to another aspect of the present application, the present application provides a method for testing the anti-shake of an optical image stabilizer, comprising: installing a lens simulator into a motor, fixing the motor on a clamp; inputting simulated shake data to the optical image stabilizer, the optical image stabilizer calculating compensation data according to the simulated shake data, driving the motor to push the lens simulator to move based on the compensation data to compensate for shake; at least one laser range finder collecting the distance between the lens simulator within a predetermined time period to generate shake measurement data; calculating the error rate and / or compensation ratio of the optical image stabilizer according to the shake measurement data and the theoretical shake compensation data.

[0008] Compared with the prior art, the present application uses laser ranging instead of the original image judgment method, without the need to wait for the debugging of the image sensor and the need to build the entire photographing system, thereby saving a large amount of resources. In addition, the restriction of the vibration table is removed, and the present application can test the compensation ratio of any angle combination of two axes. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0010] Figure 1 Front view of the motor in an embodiment of the present application;

[0011] Figure 2 Side view of the motor in an embodiment of the present application;

[0012] Figure 3 Front view of the lens simulator in an embodiment of the present application;

[0013] Figure 4 Side view of the lens simulator in an embodiment of the present application;

[0014] Figure 5 Rear view of the lens simulator in an embodiment of the present application;

[0015] Figure 6 Front view of the lens simulator and the motor assembled together in an embodiment of the present application;

[0016] Figure 7 Side view of the lens simulator and the motor assembled together in an embodiment of the present application;

[0017] Figure 8 This is a front view of the relative positions of the laser rangefinder 30 and the lens simulator 20 in one embodiment of the present invention.

[0018] Figure 9 This is a side view of the relative positions of the laser rangefinder 30 and the lens simulator 20 in one embodiment of the present invention;

[0019] Figure 10 This is a flowchart of the image stabilization test method of the image stabilization test device for an optical image stabilizer in one embodiment of the present invention;

[0020] Figure 11 This is a schematic diagram of the state of an optical image stabilizer performing an anti-shake test method in one embodiment of the present invention;

[0021] Figure 12 This is a waveform diagram of the ideal lens travel in one embodiment of the present invention;

[0022] Figure 13 This is a waveform diagram of the actual lens travel in one embodiment of the present invention;

[0023] Figure 14 This is a waveform diagram of lens travel error in one embodiment of the present invention.

Detailed Implementation Methods

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Unless otherwise specified, the terms "connected," "linked," and "connected" used herein to indicate electrical connection refer to direct or indirect electrical connection.

[0026] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "coupling" and the like should be understood in a broad sense; for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0028] In order to start testing the effect of OIS in the motor phase only, the present application provides a device and method for testing the anti-shake of an optical image stabilizer.

[0029] The device for testing the anti-shake of an optical image stabilizer provided by the present application comprises a clamp (not shown), a motor 10, a lens simulator (or a dummy lens) 20, an optical image stabilizer (not shown) and at least one laser range finder 30, wherein the motor 10 is fixed on the clamp (not shown); the lens simulator (or the dummy lens) 20 is installed on the motor 10; the optical image stabilizer (not shown) is connected with the motor 10 and drives the motor 10 to push the lens simulator (or the dummy lens) 20 to move; the laser range finder 30 can measure the distance between it and the lens simulator 20 by laser.

[0030] Please refer to Figure 1 Fig. 1 shows the front view of the motor 10 in an embodiment of the present application; please refer to Figure 2 Fig. 2 shows the side view of the motor 10 in an embodiment of the present application. Figure 1 and Figure 2 The motor 10 shown in the figure is provided with a hollow structure 12.

[0031] Please refer to Figure 3 Fig. 3 shows the front view of the lens simulator (or the dummy lens) 20 in an embodiment of the present application; please refer to Figure 4 Fig. 4 shows the side view of the lens simulator (or the dummy lens) 20 in an embodiment of the present application; please refer to Figure 5 Fig. 5 shows the back view of the lens simulator (or the dummy lens) 20 in an embodiment of the present application. Figures 3-5 The lens simulator 20 shown in the figure comprises a lens part 22 and a mounting part 24 protruding from the bottom surface of the lens part 22.

[0032] Please refer to Figure 6 Fig. 6 shows the front view of the lens simulator (or the dummy lens) 20 and the motor 10 assembled together in an embodiment of the present application; please refer to Figure 7As shown in FIG. 1, it is a side view of the lens simulator (or dummy lens) 20 and the motor 10 assembled together in an embodiment of the present application. In Figure 6 and Figure 7 In the embodiment shown in FIG. 1, the mounting portion 24 of the lens simulator 20 is mounted in the hollow structure 12 of the motor 10, and the lens portion 22 is located above the motor 10. Therefore, the lens simulator 20 needs to be separately molded to ensure its installation accuracy and surface smoothness. Figures 3-7 In the specific embodiment shown in FIG. 1, the mounting portion 24 of the lens simulator (or dummy lens) 20 is a cylinder.

[0033] The anti-shake testing device of the optical image stabilizer provided by the present application needs to perform the following operations during the anti-shake testing process.

[0034] The simulated shake data is input to the optical image stabilizer (not shown), the optical image stabilizer (not shown) calculates compensation data according to the simulated shake data, and drives the motor 10 to push the lens simulator (or dummy lens) 20 to move based on the compensation data to perform shake compensation; the laser range finder 30 collects the distance between the laser range finder 30 and the lens simulator (or dummy lens) 20 through laser measurement within a predetermined time period to generate shake measurement data (or laser data); and the error rate and / or compensation ratio of the optical image stabilizer (not shown) are calculated according to the shake measurement data and the theoretical shake compensation data.

[0035] In an embodiment, the simulated shake data is obtained by converting the predetermined rotation angle and frequency into the output of the corresponding gyroscope.

[0036] In an embodiment, the shake measurement data is synchronized with the corresponding simulated shake data. For example, the shake measurement data (or laser data) is saved while the lens simulator (or dummy lens) 20 is moving, and the shake measurement data is synchronized with the corresponding simulated shake data through time stamping; the predetermined rotation angle and frequency are synchronized with the corresponding simulated shake data.

[0037] In an embodiment, the shake measurement data is the difference between the maximum distance value or the minimum distance value measured by the laser range finder 30 and the reference distance value, and the distance between the laser range finder 30 and the lens simulator (or dummy lens) 20 measured by the laser range finder 30 in the case where the motor 10 is not started is the reference distance value; and the theoretical shake compensation data is calculated according to the simulated shake data.

[0038] Please refer to Figure 8 As shown in FIG. 2, it is a front view of the relative position of the laser range finder 30 and the lens simulator (or dummy lens) 20 in an embodiment of the present application; and please refer to Figure 9Fig. 1 shows a side view of the relative position of the laser range finder 30 and the lens simulator (or dummy lens) 20 in an embodiment of the present application. In Figure 8 and Figure 9 In the embodiment shown, there are two laser range finders 30, a first laser range finder 30 and a second laser range finder 30. The first laser range finder 30 measures the distance between the first laser range finder 30 and the lens simulator (or dummy lens) 20 along the first axis of the lens simulator (or dummy lens) 20 by laser. The second laser range finder 30 measures the distance between the second laser range finder 30 and the lens simulator (or dummy lens) 20 along the second axis of the lens simulator (or dummy lens) 20 by laser. The first axis and the second axis of the lens simulator (or dummy lens) 20 are perpendicular to each other. The first laser range finder 30 and the second laser range finder 30 work (or measure) simultaneously.

[0039] According to another aspect of the present application, the present application provides a method for testing the anti-shake performance of an optical image stabilizer, please refer to Figure 10 Fig. 2 shows a flow chart of the method for testing the anti-shake performance of an optical image stabilizer in an embodiment of the present application. Figure 10 The method for testing the anti-shake performance includes the following steps.

[0040] Step 110, install the lens simulator (or dummy lens) 20 into the motor 10, and fix the motor 10 on a clamp (not shown).

[0041] Step 120, input the simulated shake data to the optical image stabilizer (not shown), and the optical image stabilizer (not shown) calculates compensation data according to the simulated shake data, and drives the motor 10 to push the lens simulator (or dummy lens) 20 to move based on the compensation data to perform shake compensation.

[0042] Step 130, at least one laser range finder 30 measures the distance between the laser range finder 30 and the lens simulator (or dummy lens) 20 by laser within a predetermined time period to generate shake measurement data (or laser data).

[0043] Step 140, calculate the error rate and / or compensation ratio of the optical image stabilizer (not shown) according to the shake measurement data and the theoretical shake compensation data.

[0044] In an embodiment, the simulated shake data is converted from the predetermined rotation angle and frequency to the corresponding output of the gyroscope.

[0045] In one embodiment, the jitter measurement data is synchronized with the corresponding simulated jitter data. For example, when the lens simulator (or dummy lens) 20 is in action while the jitter measurement data (or laser data) is being saved, the jitter measurement data is synchronized with the corresponding simulated jitter data by time stamping; the predetermined rotation angle and frequency are synchronized with the corresponding simulated jitter data.

[0046] In one embodiment, the jitter measurement data is the difference between the maximum distance value or the minimum distance value measured by the laser range finder 30 and the reference distance value, the distance between the laser range finder 30 and the lens simulator (or dummy lens) 20 measured by the laser range finder 30 when the motor 10 is not started is the reference distance value; the theoretical jitter compensation data is calculated according to the simulated jitter data.

[0047] Please refer to Figure 8 , which is a front view of the relative position of the laser range finder 30 and the lens simulator (or dummy lens) 20 in one embodiment of the present application; please refer to Figure 9 , which is a side view of the relative position of the laser range finder 30 and the lens simulator (or dummy lens) 20 in one embodiment of the present application. In Figure 8 and Figure 9 , in the embodiment shown, there are two laser range finders 30, which are the first laser range finder 30 and the second laser range finder 30; the first laser range finder 30 measures the distance between it and the lens simulator (or dummy lens) 20 along the direction of the first axis of the lens simulator (or dummy lens) 20; the second laser range finder 30 measures the distance between it and the lens simulator (or dummy lens) 20 along the direction of the second axis of the lens simulator (or dummy lens) 20; wherein the first axis and the second axis of the lens simulator (or dummy lens) 20 are perpendicular to each other; the first laser range finder 30 and the second laser range finder 30 work (or measure) at the same time.

[0048] Please refer to Figure 11 , which is a state diagram of the optical image stabilizer for performing the anti-shake test method in one embodiment of the present application. In Figure 11 , it can be seen that the laser range finder 30 shoots laser from the side to the lens simulator (or dummy lens) 20; under the condition that the laser position (or laser path) remains unchanged, as the simulated jitter data changes, the laser ranging result obtained by the laser range finder 30 will also change significantly.

[0049] Please refer to Figure 12 , which is a waveform diagram of the ideal lens stroke in one embodiment of the present application; please refer to Figure 13 , which is a waveform diagram of the actual lens stroke in one embodiment of the present application; please refer to Figure 14As shown, it is a waveform diagram of lens travel error in one embodiment of the present application.

[0050] In summary, the present application provides a kind of optical image stabilizer anti-shake testing device and anti-shake testing method, it removes vibration table, using analog jitter data and laser ranging method measures the actual displacement of lens, and then calculates the compensation ratio of anti-shake, it does not need to take photograph system and image sensor, so as to save a lot of resources, also improve the efficiency of the whole system debugging.In addition, after removing the vibration table, the present application can not be limited to test the compensation rate under the condition of two axes at any angle.

[0051] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example.Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the person skilled in the art can combine and combine different embodiments or examples described in the present application.

[0052] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present application.

Claims

1. A device for testing the anti-shake of an optical image stabilizer, characterized in that, It comprises: a clamp; a motor fixed on the clamp; a lens simulator installed on the motor; an optical image stabilizer connected with the motor and driving the motor to push the lens simulator to move; at least one laser range finder capable of measuring the distance between it and the lens simulator by laser, The anti-shake test device performs the following operations during the anti-shake test process: inputting simulated jitter data to the optical image stabilizer, the optical image stabilizer calculating compensation data according to the simulated jitter data, and driving the motor to push the lens simulator to move based on the compensation data to perform jitter compensation; The laser range finder collects the distance between it and the lens simulator within a predetermined time period to generate jitter measurement data; According to the jitter measurement data and the theoretical jitter compensation data, the error rate and / or compensation ratio of the optical image stabilizer are calculated, The simulated jitter data is obtained by converting the corresponding gyroscope output from the predetermined rotation angle and frequency; The jitter measurement data is synchronized with the corresponding simulated jitter data; The predetermined rotation angle and frequency are synchronized with the corresponding simulated jitter data; The jitter measurement data is the difference between the maximum or minimum distance value measured by the laser range finder and the reference distance value, and the distance between the laser range finder and the lens simulator measured by the laser range finder in the case where the motor is not started is the reference distance value; The theoretical jitter compensation data is calculated according to the simulated jitter data, The laser range finder is two, respectively first laser range finder and second laser range finder; The first laser range finder measures the distance between it and the lens simulator along the direction of the first axis of the lens simulator by laser; The second laser range finder measures the distance between it and the lens simulator along the direction of the second axis of the lens simulator by laser; Wherein, the first axis and the second axis of the lens simulator are perpendicular to each other; The first laser range finder and the second laser range finder work simultaneously.

2. The anti-shake test device for optical image stabilizer according to claim 1, wherein, The motor is provided with a hollow structure; The lens simulator comprises a lens part and a mounting part protruding from the bottom surface of the lens part; The mounting part of the lens simulator is installed in the hollow structure of the motor, and the lens part is located above the motor.

3. A method of shake correction testing of a shake correction testing apparatus of an optical image stabilizer, characterized by, It comprises: installing a lens simulator into a motor, and fixing the motor on a clamp; inputting simulated jitter data to the optical image stabilizer, the optical image stabilizer calculating compensation data according to the simulated jitter data, and driving the motor to push the lens simulator to move based on the compensation data to perform jitter compensation; at least one laser range finder collects the distance between it and the lens simulator within a predetermined time period to generate jitter measurement data; According to the jitter measurement data and the theoretical jitter compensation data, the error rate and / or compensation ratio of the optical image stabilizer are calculated, The simulation jitter data is obtained by converting a predetermined rotation angle and frequency into corresponding gyro output; The jitter measurement data is synchronized with corresponding simulation jitter data; The predetermined rotation angle and frequency are synchronized with corresponding simulation jitter data; The jitter measurement data is a difference between a maximum or minimum distance value measured by the laser range finder and a reference distance value, wherein the distance between the laser range finder and the lens simulator is the reference distance value when the motor is not started; The theoretical jitter compensation data is calculated according to the simulation jitter data, The laser range finder is two, which are a first laser range finder and a second laser range finder; The first laser range finder measures the distance between the first laser range finder and the lens simulator along a first axis of the lens simulator by laser; The second laser range finder measures the distance between the second laser range finder and the lens simulator along a second axis of the lens simulator by laser; The first axis and the second axis of the lens simulator are perpendicular to each other; The first laser range finder and the second laser range finder work simultaneously.

4. The anti-shake testing method of the anti-shake testing device of the optical image stabilizer according to claim 3, wherein, The motor is provided with a hollow structure; The lens simulator comprises a lens part and a mounting part protruding from the bottom surface of the lens part; The mounting part of the lens simulator is installed in the hollow structure of the motor, and the lens part is located above the motor.

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