CN115914620A - Anti-shake testing device and anti-shake testing method for optical image stabilizer - Google Patents
Anti-shake testing device and anti-shake testing method for optical image stabilizer Download PDFInfo
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Abstract
The invention provides an anti-shake testing device and an anti-shake testing method of an optical image stabilizer, wherein the anti-shake testing device of the optical image stabilizer comprises the following components: a turntable; a motor mounted on said turntable, said turntable being capable of providing rotation of a predetermined frequency and amplitude to said motor; a lens simulator mounted on the motor; an optical image stabilizer connected with the motor and driving the motor to push the lens simulator to move; a gyroscope capable of measuring a rotation angle of the motor; a laser range finder capable of measuring a distance between the laser range finder and the lens simulator by laser. Compared with the prior art, the invention adopts laser ranging to replace the original image judgment mode under the condition that the camera module is not integrated in the earlier stage of research and development and the image sensor is not integrated, and corrects the compensation quantity by analyzing the relation between the laser measurement value and the equipment installation variable, thereby improving the accuracy of laser measurement.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of anti-shake testing of an optical image stabilizer, in particular to an anti-shake testing device and an anti-shake testing method of the optical image stabilizer.
[ background of the invention ]
In OIS (Optical Image Stabilizer) applications, the anti-shake effect is generally evaluated by calculating the compression ratio of the Image, and this method is suitable for the module or the whole machine debugging phase. In the early development stage of the module, only a voice coil motor and an OIS driving chip are provided, an image sensor is not integrated, and images cannot be acquired and the compression ratio cannot be calculated.
Therefore, a new technical solution is needed to solve the above problems.
[ summary of the invention ]
An objective of the present invention is to provide an anti-shake testing apparatus and an anti-shake testing method for an optical image stabilizer, which evaluate an anti-shake effect by measuring a lens position with laser and correct a displacement compensation value to improve an accuracy of laser measurement in an early stage of a camera module development without integrating an image sensor.
According to an aspect of the present invention, there is provided an anti-shake test apparatus of an optical image stabilizer, including: a turntable; a motor mounted on said turntable, said turntable being capable of providing rotation of a predetermined frequency and amplitude to said motor; a lens simulator mounted on the motor; an optical image stabilizer connected with the motor and driving the motor to push the lens simulator to move; a gyroscope capable of measuring a rotation angle of the motor; a laser range finder capable of measuring a distance between the laser range finder and the lens simulator by laser.
According to another aspect of the present invention, there is provided an anti-shake testing method of an anti-shake testing apparatus of an optical image stabilizer, comprising: installing a lens simulator into a motor, installing the motor on a turntable, and setting the preset frequency and amplitude of the turntable; closing the optical image stabilizer, starting the rotary table to rotate at a preset frequency and amplitude, and collecting the distance between the laser range finder and the laser range finder within a preset time length to generate first jitter measurement data; calculating a true value of a coordinate of a point B based on the first jitter measurement data and the rotation angle measured by the gyroscope, wherein the point B is a position where a laser beam emitted by the laser range finder irradiates on the lens simulator 20 when the turntable is not stationary, and the rotation angle measured by the gyroscope is the rotation angle of the motor measured by the gyroscope; writing the real value of the coordinate of the point B obtained by calculation into an optical image stabilization algorithm of the optical image stabilizer as a correction parameter; starting the optical image stabilizer, starting the turntable to rotate at a preset frequency and amplitude, calculating compensation data by the optical image stabilizer based on a corrected optical image stabilization algorithm and a rotation angle measured by the gyroscope, and driving the motor to perform rotation compensation based on the compensation data so as to push the lens simulator to move, wherein at the moment, the laser range finder collects the distance between the laser range finder and the lens simulator within a preset time length so as to generate second jitter measurement data; and calculating the compensation stroke of the lens simulator according to the first jitter measurement data, the second jitter measurement data, the rotation angle obtained by the measurement of the gyroscope and the coordinates of the point B, which are acquired by the laser range finder, and calculating the compensation proportion of the optical image stabilizer according to the compensation stroke.
Compared with the prior art, the invention adopts laser ranging to replace the original image judgment mode under the condition that the camera module is not integrated in the earlier stage of research and development and the image sensor is not integrated, and corrects the compensation quantity by analyzing the relation between the laser measurement value and the equipment installation variable, thereby improving the accuracy of laser measurement.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a front view of a motor in one embodiment of the present invention;
FIG. 2 is a side view of a motor in one embodiment of the present invention;
FIG. 3 is a front view of a lens simulator in one embodiment of the invention;
FIG. 4 is a side view of a lens simulator in one embodiment of the invention;
FIG. 5 is a rear view of a lens simulator in one embodiment of the invention;
FIG. 6 is a front view of a lens simulator and motor assembled together in one embodiment of the invention;
FIG. 7 is a side view of a lens simulator and motor assembled together in one embodiment of the invention;
FIG. 8 is a top view of an anti-shake test apparatus for an optical image stabilizer in an embodiment of the present invention;
fig. 9 is a flowchart illustrating an anti-shake testing method of an anti-shake testing apparatus for an optical image stabilizer according to an embodiment of the invention.
[ detailed description ] embodiments
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Unless otherwise specified, the terms connected, and connected as used herein mean electrically connected, directly or indirectly.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," "coupled," and the like are to be construed broadly; for example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be in communication within two elements or in interactive relationship between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In Optical Image Stabilization (OIS) applications, the lens needs to be kept unchanged to improve the imaging stability of the image sensor and reduce the imaging blur. The anti-shake effect is generally evaluated by calculating the compression ratio of the image, and the method is suitable for the module or the whole machine debugging stage. In the early stage of module development, only a voice coil motor and an OIS driving chip are used, an image sensor is not integrated, images cannot be acquired, and a compression ratio cannot be calculated, so that an anti-shake effect needs to be evaluated in other ways, and the measurement of the lens displacement through laser is a feasible means. The current mainstream OIS test platform jitter source is the turntable, and the angle change is generated so as to simulate the shaking caused by the hand-held equipment of people in the real use scene. In a general evaluation process, a device to be tested is placed on a turntable, and a lens is driven to move through the rotation of the turntable, so that the lens does not move in a simple translation manner but rotates, and a plurality of factors such as an incident position, an installation angle, a lens rotation angle and the like can be introduced into a laser output result. It is therefore necessary to extract a variable related to the laser measurement value and correct the amount to be compensated to improve the evaluation accuracy of the laser measurement. Accordingly, the invention provides an anti-shake testing device and an anti-shake testing method for an optical image stabilizer.
The anti-shake test device of the optical image stabilizer provided by the invention comprises a rotary table (not shown), a motor 10, a lens simulator (or a false lens) 20, an optical image stabilizer (not shown), a gyroscope (not shown) and a laser range finder 30, wherein the motor 10 is arranged on the rotary table (not shown), and the rotary table (not shown) can provide rotation (or rotation) with preset frequency and amplitude for the motor 10; a lens simulator (or dummy lens) 20 is mounted on the motor 10; an optical image stabilizer (not shown) is connected to the motor 10 and drives the motor 10 to move the lens simulator (or dummy lens) 20; a gyroscope (not shown) capable of measuring the rotation angle of the motor 10; the laser range finder 30 can measure its distance from the lens simulator 20 by laser.
Referring to fig. 1, a front view of a motor 10 according to an embodiment of the present invention is shown; please refer to fig. 2, which is a side view of the motor 10 according to an embodiment of the present invention. A hollow structure 12 is provided in the motor 10 shown in fig. 1 and 2.
Referring to fig. 3, a front view of a lens simulator (or false lens) 20 according to an embodiment of the invention is shown; please refer to fig. 4, which is a side view of a lens simulator (or dummy lens) 20 according to an embodiment of the present invention; fig. 5 is a rear view of a lens simulator (or false lens) 20 according to an embodiment of the invention. The lens simulator 20 shown in fig. 3-5 includes a lens portion 22 and a mounting portion 24 protruding from a bottom surface of the lens portion 22.
Please refer to fig. 6, which is a front view of the lens simulator (or dummy lens) 20 and the motor 10 assembled together according to an embodiment of the present invention; fig. 7 is a side view of the lens simulator (or dummy lens) 20 and the motor 10 assembled together according to an embodiment of the present invention. In the embodiment shown in fig. 6 and 7, the mount 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, and the lens simulator (or dummy lens) 20 needs to be separately opened to secure its mounting accuracy and surface smoothness. In the particular embodiment shown in fig. 3-7, the mount 24 of the lens simulator (or false lens) 20 is a cylinder.
Please refer to fig. 8, which is a top view of an anti-shake testing apparatus for an optical image stabilizer according to an embodiment of the present invention. Where Lens is the Lens simulator 20 and O is the rotation axis of Lens (i.e., lens simulator 20); laser is the laser beam emitted by the laser range finder 30. In fig. 7, a rectangular coordinate system is established, and coordinates of a rotation axis O of Lens (i.e., the Lens simulator 20) are set to (0, 0); the direction of a laser beam laser emitted by the laser range finder 30 is parallel to the y-axis direction.
When the turntable is at rest (or closed), the laser irradiates a point B on Lens, or when the turntable is not rotated, the laser beam emitted by the laser range finder 30 irradiates the Lens (i.e. the Lens simulator 20), and the coordinates of the point B are (-db, -da'); l is the edge of Lens simulator 20; point a is the distance from the rotation axis O of Lens (i.e., lens simulator 20) to the edge L of Lens (i.e., lens simulator 20), and the coordinates of point a are (0, -da).
When the turret is rotated (or turned on) and the optical image stabilizer is turned off, lens (i.e., the Lens simulator 20) is rotated by θ degrees (long dashed line) around the rotation axis O, and at this time, the edge of Lens (i.e., the Lens simulator 20) is L'; the intersection point of the laser beams laser and lens (i.e., the lens simulator 20) emitted from the laser range finder 30 changes to the point B' (uncompensated).
Theoretically, when the turntable is rotated (or turned on) and the OIS algorithm of the optical image stabilizer is turned on, the gyroscope senses the angle change of the motor 10, the OIS algorithm of the optical image stabilizer drives the motor 10 to perform displacement compensation based on the rotation angle of the motor 10 (which is equal to the rotation angle θ of Lens) measured by the gyroscope, and Lens (i.e., the Lens simulator 20) moves by Δ d (short dashed line); after compensation, the intersection point of laser beam laser and lens (i.e. lens simulator 20) returns to point B in space, and the output of laser range finder 30 returns to its original value.
As can be seen from the above analysis of fig. 7, the required compensation amounts Δ d and B, a point a (focal length), θ angle are all related: Δ d = f (da, db, θ). Since the coordinates of the point B are (-db, -da), the required compensation amount Δ d is related to the position of the point B and the angle θ. The compensation quantity Δ d can be calculated by using da and db as correction parameters and θ as an input quantity in the OIS algorithm of the optical image stabilizer.
The following describes in detail the extraction and evaluation process of the variables related to the laser measurement value of the laser range finder 30.
When the turret is rotated (or turned on) and the optical image stabilizer is turned off, let L' be the edge of Lens (i.e., the Lens simulator 20) after the turret is rotated, and the expression:
y＝k'*x+b'
when the distance from the rotation axis O to the Lens edge L ' of Lens simulator 20 becomes a point a ' with coordinates (da × sin θ, -da × cos θ), an expression of L ' can be obtained:
the intersection point of the Lens (i.e., the Lens simulator 20) edge L 'of Lens and the laser beam laser emitted from the laser range finder 30 becomes a B' point having coordinates (-db, -db tan θ -da cos θ -da sin θ tan θ).
By the relative positional relationship dis = By-By 'of the B point and the B' point, the laser measurement value of the laser range finder 30 can be obtained:
dis＝-da+db*tanθ+da*cosθ+da*sinθ*tanθ≈θ*db+θ 2 *da (1)
since θ is a small value in the formula, a trigonometric function including θ is approximated to reduce the amount of computation. From this, the variable information contained in the laser measurement dis can be obtained.
When the turntable is rotated (or turned on) and the optical image stabilizer is turned off, the actual values of da and db can be calculated by substituting the laser measurement values of the laser range finder 30 into equation (1).
For example, taking dis as the laser measurement value of the laser range finder 30 and θ as the angle value integrated by the gyroscope (or the rotation angle measured by the gyroscope), after obtaining several sets of laser measurement values and angle values, we can obtain:
wherein d = [ db da ] is the correction parameter.
And (4) substituting the actual values of the correction parameters da and db into the OIS algorithm of the optical image stabilizer, so that the OIS algorithm of the optical image stabilizer can be corrected. The compensation amount Δ d can be calculated by using θ as the input amount of the OIS algorithm of the corrected optical image stabilizer. Thus, after the OIS algorithm of the optical image stabilizer is turned on, the range of variation of the laser measurement value of the laser range finder 30 is greatly reduced when the jitter occurs, and the suppression ratio is calculated based on the range of variation.
Based on the above analysis, the anti-shake testing apparatus for an optical image stabilizer provided in the present invention needs to perform the following operations during the anti-shake testing process.
The optical image stabilizer (not shown) is turned off, the turret (not shown) is started to rotate at a predetermined frequency and amplitude, and the laser rangefinder 30 collects the distance between it and the lens simulator (or dummy lens) 20 for a predetermined time period to generate first jitter measurement data (or first laser measurement value).
The actual value (or specific numerical value) of the coordinates of the point B is calculated based on the first jitter measurement data and the rotation angle measured by the gyroscope (not shown), where the point B (not shown) is the position where the Lens (i.e. the Lens simulator 20) is irradiated by the laser beam laser emitted by the laser range finder 30 when the turntable is at rest (or closed).
And writing the real value of the coordinate of the point B obtained by calculation into an optical image stabilization algorithm (namely an OIS algorithm) of the optical image stabilizer as a correction parameter.
Turning on an optical image stabilizer (not shown), and starting a turntable (not shown) to rotate at a predetermined frequency and amplitude; the optical image stabilizer (not shown) calculates compensation data (or compensation amount) based on the corrected optical image stabilization algorithm and the rotation angle measured by the gyroscope, and drives the motor 10 to perform rotation compensation (or shake compensation) based on the compensation data to push the lens simulator 20 to move, at which time the laser range finder 30 collects a distance between itself and the lens simulator 20 for a predetermined time period to generate second shake measurement data (or second laser measurement value).
The compensation stroke of the lens simulator 20 is calculated from the first jitter measurement data and the second jitter measurement data acquired by the laser range finder 30, the rotation angle measured by the gyroscope (not shown), and the coordinates of the point B, and the compensation ratio of the optical image stabilizer (not shown) is calculated from the compensation stroke.
As can be seen from the foregoing analysis of fig. 8, the true value of the coordinates (-db, -da) of the point B can be calculated according to the following formula,
dis＝-da+db*tanθ+da*cosθ+da*sinθ*tanθ≈θ*db+θ 2 *da
where dis = By-B' y, where By is the distance between the laser range finder 30 and the lens simulator 20 measured when the turntable is stationary (or closed); b' y is the maximum or minimum distance between the laser range finder 30 and the lens simulator 20 measured when the turret is rotated (or started) and the optical image stabilizer is turned off. Dis can also be said to be the first jitter measurement data measured by the laser rangefinder 30. Theta is measured by the gyroscope when the turntable is rotated (or turned on) and the optical image stabilizer is turned off.
As can be seen from the foregoing analysis of fig. 8, in the rectangular coordinate system in which the anti-shake test apparatus for an optical image stabilizer shown in fig. 7 is located, the coordinates of the rotation axis O of Lens (i.e., the Lens simulator 20) are set to (0, 0); the direction of a laser beam laser emitted by the laser range finder 30 is parallel to the y-axis direction.
As can be seen from the foregoing analysis of fig. 8, in a preferred embodiment, when the turntable is rotated (or turned on) and the optical image stabilizer is turned off, after acquiring several sets of the first shake measurement data dis and the corresponding rotation angle θ measured by the gyroscope (not shown), it can be obtained:
wherein d = [ db da ] is the correction parameter.
It should be noted that the jitter measurement data (e.g., the first jitter measurement data, the second jitter measurement data) is a difference between the maximum distance or the minimum distance measured by the laser range finder 30 from the lens simulator 20 and a reference distance value, where the reference distance value is a distance measured by the laser range finder 30 from the lens simulator 20 when the turntable is stationary.
Referring to fig. 9, a flowchart of an anti-shake testing method for an anti-shake testing apparatus of an optical image stabilizer according to an embodiment of the invention is shown. The anti-shake test method shown in fig. 9 includes the following steps.
And step 940, writing the real value of the calculated coordinates of the point B into an optical image stabilization algorithm (namely an OIS algorithm) of the optical image stabilizer as a correction parameter.
In step 960, a compensation stroke of the lens simulator 20 is calculated according to the first jitter measurement data and the second jitter measurement data collected by the laser range finder 30, the rotation angle measured by the gyroscope (not shown) and the coordinates of the point B, and a compensation ratio of the optical image stabilizer (not shown) is calculated according to the compensation stroke.
As can be seen from the foregoing analysis of fig. 8, the true value of the coordinates (-db, -da) of the point B can be calculated according to the following formula,
dis＝-da+db*tanθ+da*cosθ+da*sinθ*tanθ≈θ*db+θ 2 *da
where dis = By-B' y, where By is the distance between the laser range finder 30 and the lens simulator 20 measured when the turntable is stationary (or closed); b' y is the maximum or minimum distance between the laser range finder 30 and the lens simulator 20 measured when the turret is rotated (or started) and the optical image stabilizer is turned off. Dis can also be said to be the first jitter measurement data measured by the laser rangefinder 30. Theta is measured by the gyroscope when the turntable is rotated (or turned on) and the optical image stabilizer is turned off.
As can be seen from the foregoing analysis of fig. 8, in the rectangular coordinate system in which the anti-shake test apparatus for an optical image stabilizer shown in fig. 7 is located, the coordinates of the rotation axis O of Lens (i.e., the Lens simulator 20) are set to (0, 0); the laser beam laser emitted by the laser range finder 30 is parallel to the y-axis direction.
As can be seen from the foregoing analysis of fig. 8, in a preferred embodiment, when the turntable is rotated (or turned on) and the optical image stabilizer is turned off, after several sets of first jitter measurement data dis and corresponding rotation angles θ measured by a gyroscope (not shown) are acquired, it is possible to obtain:
wherein d = [ db da ] is the correction parameter.
It should be noted that the jitter measurement data (e.g., the first jitter measurement data, the second jitter measurement data) is a difference between the maximum distance or the minimum distance measured by the laser range finder 30 from the lens simulator 20 and a reference distance value, where the reference distance value is a distance measured by the laser range finder 30 from the lens simulator 20 when the turntable is stationary.
In summary, the present invention provides an anti-shake testing apparatus and an anti-shake testing method for an optical image stabilizer, which derive a relationship between a laser measurement value and each variable according to an installation condition of the anti-shake testing apparatus; under the condition of closing the OIS algorithm, calculating a variable value to be compensated according to the first jitter measurement data (or the first laser measurement value); and writing the variable value as a correction parameter into the OIS algorithm, starting the OIS algorithm, recording second jitter measurement data (or a second laser measurement value) and evaluating the anti-jitter effect, thereby improving the accuracy of laser measurement.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention and that variations, modifications, and alterations to the above embodiments may occur to those of ordinary skill in the art and are within the scope of the present invention.
Claims (13)
1. An anti-shake test apparatus for an optical image stabilizer, comprising:
a turntable;
a motor mounted on said turntable, said turntable being capable of providing rotation of a predetermined frequency and amplitude to said motor;
a lens simulator mounted on the motor;
an optical image stabilizer connected with the motor and driving the motor to push the lens simulator to move;
a gyroscope capable of measuring a rotation angle of the motor;
a laser range finder capable of measuring a distance between the laser range finder and the lens simulator by laser.
2. The anti-shake test apparatus for an optical image stabilizer according to claim 1,
during the anti-shake test, the following operations are executed:
closing the optical image stabilizer, starting the rotary table to rotate at a preset frequency and amplitude, and collecting the distance between the laser range finder and the laser range finder within a preset time length to generate first jitter measurement data;
calculating a true value of a coordinate of a point B based on the first jitter measurement data and a rotation angle measured by the gyroscope, wherein the point B is a position where a laser beam emitted by the laser range finder irradiates on the lens simulator when the turntable is not static;
writing the real value of the coordinate of the point B obtained by calculation into an optical image stabilizing algorithm of the optical image stabilizer as a correction parameter;
starting the optical image stabilizer, starting the turntable to rotate at a preset frequency and amplitude, calculating compensation data by the optical image stabilizer based on a corrected optical image stabilization algorithm and a rotation angle measured by the gyroscope, and driving the motor to perform rotation compensation based on the compensation data so as to push the lens simulator to move, wherein at the moment, the laser range finder collects the distance between the laser range finder and the lens simulator within a preset time length so as to generate second jitter measurement data;
and calculating the compensation stroke of the lens simulator according to the first jitter measurement data and the second jitter measurement data acquired by the laser range finder, the rotation angle measured by the gyroscope and the coordinates of the point B, and calculating the compensation proportion of the optical image stabilizer according to the compensation stroke.
3. The anti-shake test apparatus for an optical image stabilizer according to claim 2,
the true value of the coordinates (-db, -da) of the point B is calculated according to the following formula,
dis＝-da+db*tanθ+da*cos+θda*sinθ*tanθ
≈θ*db+θ 2 *da
the distance between the laser range finder and the lens simulator is measured By the laser range finder when the rotary table is static; b' y is the maximum distance or the minimum distance between the optical image stabilizer and the lens simulator, which is measured by the laser range finder when the turntable rotates and the optical image stabilizer is closed; dis is the first jitter measurement data measured by the laser range finder; and theta is measured by the gyroscope when the turntable rotates and the optical image stabilizer is closed.
4. The anti-shake test apparatus for an optical image stabilizer according to claim 3,
in a rectangular coordinate system where the anti-shake test device of the optical image stabilizer is located,
the coordinates of the rotation axis O of the lens simulator are set to (0, 0);
the direction of the laser beam emitted by the laser range finder is parallel to the y-axis direction.
5. The anti-shake test apparatus for an optical image stabilizer according to claim 3,
when the turntable rotates and the optical image stabilizer is closed, after a plurality of groups of first jitter measurement data and corresponding rotation angles theta obtained by the measurement of the gyroscope are obtained, the following results are obtained:
wherein d = [ db da ] is the correction parameter.
6. The anti-shake test apparatus for an optical image stabilizer according to claim 1,
a hollow structure is arranged in the motor;
the lens simulator comprises a lens part and a mounting part protruding out of the bottom surface of the lens part;
the installation department of camera lens simulator install in the hollow structure of motor, just the camera lens portion is located the top of motor.
7. The anti-shake test apparatus for an optical image stabilizer according to any one of claims 2 to 5,
the jitter measurement data is the difference between the maximum distance or the minimum distance between the jitter measurement data and the lens simulator measured by the laser range finder and a reference distance value;
the reference distance value is the distance between the laser range finder and the lens simulator measured by the laser range finder under the condition that the rotary table is static.
8. An anti-shake test method of an anti-shake test apparatus of an optical image stabilizer, comprising:
mounting a lens simulator in a motor, mounting said motor on a turret, setting a predetermined frequency and amplitude of said turret,
closing the optical image stabilizer, starting the rotary table to rotate at a preset frequency and amplitude, and collecting the distance between the laser range finder and the laser range finder within a preset time length to generate first jitter measurement data;
calculating a true value of a coordinate of a point B based on the first jitter measurement data and the rotation angle measured by the gyroscope, wherein the point B is a position where a laser beam emitted by the laser range finder irradiates on the lens simulator 20 when the turntable is not stationary, and the rotation angle measured by the gyroscope is the rotation angle of the motor measured by the gyroscope;
writing the real value of the coordinate of the point B obtained by calculation into an optical image stabilizing algorithm of the optical image stabilizer as a correction parameter;
starting the optical image stabilizer, starting the turntable to rotate at a preset frequency and amplitude, calculating compensation data by the optical image stabilizer based on a corrected optical image stabilization algorithm and a rotation angle measured by the gyroscope, and driving the motor to perform rotation compensation based on the compensation data so as to push the lens simulator to move, wherein at the moment, the laser range finder collects the distance between the laser range finder and the lens simulator within a preset time length so as to generate second jitter measurement data;
and calculating the compensation stroke of the lens simulator according to the first jitter measurement data and the second jitter measurement data acquired by the laser range finder, the rotation angle measured by the gyroscope and the coordinates of the point B, and calculating the compensation proportion of the optical image stabilizer according to the compensation stroke.
9. The anti-shake test method of an anti-shake test apparatus of an optical image stabilizer according to claim 8,
the true value of the coordinates (-db, -da) of the point B is calculated according to the following formula,
dis＝-da+db*tanθ+da*cosθ+da*sinθ*tanθ
≈θ*db+θ 2 *da
the distance between the laser range finder and the lens simulator is measured By the laser range finder when the rotary table is static; b' y is the maximum distance or the minimum distance between the optical image stabilizer and the lens simulator, which is obtained by the measurement of the laser range finder when the turntable rotates and the optical image stabilizer is closed; dis is the first jitter measurement data measured by the laser rangefinder; and theta is measured by the gyroscope when the turntable rotates and the optical image stabilizer is closed.
10. The anti-shake test method of an anti-shake test apparatus of an optical image stabilizer according to claim 9,
in a rectangular coordinate system where the anti-shake test device of the optical image stabilizer is located,
the coordinates of the rotation axis O of the lens simulator are set to (0, 0);
the direction of the laser beam emitted by the laser range finder is parallel to the y-axis direction.
11. The anti-shake test method of an anti-shake test apparatus of an optical image stabilizer according to claim 9,
when the turntable rotates and the optical image stabilizer is closed, after a plurality of groups of first jitter measurement data and corresponding rotation angles theta obtained by the measurement of the gyroscope are obtained, the following results are obtained:
wherein d = [ db da ] is the correction parameter.
12. The anti-shake test method of an anti-shake test apparatus of an optical image stabilizer according to claim 8,
a hollow structure is arranged in the motor;
the lens simulator comprises a lens part and a mounting part protruding out of the bottom surface of the lens part;
the installation department of camera lens simulator install in the hollow structure of motor, just the camera lens portion is located the top of motor.
13. The anti-shake test method of the anti-shake test apparatus for an optical image stabilizer according to any one of claims 8 to 11,
the jitter measurement data is the difference between the maximum distance or the minimum distance between the jitter measurement data and the lens simulator measured by the laser range finder and a reference distance value;
the reference distance value is the distance between the laser range finder and the lens simulator measured by the laser range finder under the condition that the rotary table is not started.
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