KR101835801B1 - Inspecting device and inspecting method of optical image stabilizer - Google Patents

Abstract

The present invention relates to an inspection apparatus and an inspection method of an optical image stabilization unit which can reduce the amount of a sensor required in comparison with the prior art, can quickly perform inspection of an optical image stabilization unit, and simplify the entire algorithm.
To this end, at least three markers are displayed on the optical image stabilization unit, and the optical image stabilizer is moved in the first direction and in the second direction perpendicular to the first direction, And a third direction perpendicular to the imaginary plane included in the optical image stabilizing unit, and an actuator that is inclined in the first direction, the second direction, and the third direction, A first camera unit for photographing the marked markers; a second camera unit disposed at an angle to the first direction, the second direction and the third direction in a state in which the first camera unit is spaced apart from the first camera unit, A second camera unit for photographing, and a control unit for calculating an actual displacement of the optical image stabilization unit based on the first marker displacement and the second marker displacement All.

Description

Technical Field [0001] The present invention relates to an inspection apparatus and an inspection method of an optical image stabilization unit,

The present invention relates to an inspection apparatus and an inspection method for an optical image stabilization unit, and more particularly, to an inspection apparatus and an inspection method for an optical image stabilization unit, which include two camera units arranged in a space formed by three axes orthogonal to each other, The present invention relates to an inspection apparatus and an inspection method of an optical camera shake correction unit which can simplify the entire algorithm and inspect the optical camera shake correction unit in inspecting the optical camera shake correction unit.

In general, the adoption of a camera device in a mobile communication terminal is becoming commonplace. Since a lot of photographing using a mobile communication terminal is performed on the move, in order to obtain a high quality image, a camera device of a mobile communication terminal essentially requires a camera shake correction device for correcting vibration such as camera shake.

In particular, since the camera device includes the image stabilization device, it is possible to acquire a clear image in an environment having a slow shutter speed due to lack of light as in a dark room or at night.

The optical image stabilizer (OIS) in the camera shake correction unit changes the position of the optical lens or the image sensor through the driving unit so that the image of the subject formed on the image sensor is corrected .

However, since the inspection apparatus of the camera shake correction unit according to the related art includes three displacement sensors and one tilt sensor corresponding to three axes or a five-axis complex sensor, the total amount of the sensor is large, the entire algorithm is complicated, And it takes a lot of time to do so.

Korean Patent Registration No. 10-1075710 (entitled " Optical Image Stabilizer and Manufacturing Method Thereof, "

It is an object of the present invention to solve the conventional problems, and it is possible to reduce the required amount of the sensor by using two camera units arranged in a space formed by three axes orthogonal to each other, The present invention provides an inspection apparatus and an inspection method of an optical image stabilization unit that can simplify the entire algorithm and quickly perform inspection of the optical image stabilization unit.

According to a preferred embodiment of the present invention for achieving the object of the present invention, in the inspection apparatus for an optical image stabilization unit according to the present invention, at least three markers are displayed on the optical image stabilization unit, An actuator for moving at least one of a first direction, a second direction perpendicular to the first direction, and a third direction perpendicular to a virtual plane including the first direction and the second direction; A first camera unit disposed obliquely both in the first direction, the second direction, and the third direction to photograph at least two of the markers displayed on the optical image stabilization unit in accordance with the operation of the actuator; And a second camera unit that is disposed at an angle to the first direction, the second direction, and the third direction in a state of being spaced apart from the first camera unit, wherein, in accordance with an operation of the actuator, A second camera unit for photographing at least two of the at least one of the plurality of markers; And an actual image of the optical image stabilization unit based on a first marker displacement extracted from the first image information captured by the first camera unit and a second marker displacement extracted from the second image information captured by the second camera unit, And a control unit for calculating the displacement.

Here, each of the first camera unit and the second camera unit includes: a microscope lens unit for enlarging an incident image; A relay lens unit for imaging the image magnified by the microscope lens unit; And a camera unit for acquiring the image formed by the relay lens unit.

Here, each of the first camera unit and the second camera unit may include at least one of the microscope lens unit, the relay lens unit, and the camera unit so that the camera unit recognizes only an area where the marker is displayed, And a section setting section for moving the display section.

Here, each of the first camera unit and the second camera unit has a magnification of 1: 1, a depth of focus of 1 to 2 mm, and a frame rate of 100 Hz to 10 kHz .

Here, the control unit may include: a shake reproducing unit for applying an operation signal to the actuator; A first information extracting unit for extracting the first marker displacement from first image information photographed by the first camera unit; A second information extracting unit for extracting the second marker displacement from second image information captured by the second camera unit; A data collector for storing the first image information, the second image information, the first marker displacement and the second marker displacement in association with each other; And an information comparator for calculating an actual displacement of the optical image stabilization unit based on the first marker displacement and the second marker displacement.

The apparatus for inspecting an optical image stabilization unit according to the present invention further includes a drive amount measurement unit for measuring a drive amount of the optical image stabilization unit operated by the actuator, And stores the second image information, the first marker displacement, the second marker displacement, and the drive amount in association with each other.

Here, the control unit may further include an image correcting unit for calculating a unit movement amount of the marker with the unit driving amount of the optical image stabilization unit according to the operation of the actuator.

Here, the control unit further compares the actual displacement with a predetermined limit displacement.

Here, the first camera unit and the second camera unit are arranged so as to cross each other with respect to the third direction and not face each other.

At least one of the first camera unit and the second camera unit may adjust the height of the camera unit so as to adjust the resolution for calculating the actual displacement of the optical camera shake correction unit, do.

In the inspection method for an optical image stabilization unit according to the present invention, at least three markers are displayed on the optical image stabilization unit, and the optical image stabilization unit is moved in a first direction, in a second direction perpendicular to the first direction, Moving in at least one of a first direction and a third direction perpendicular to a virtual plane including the second direction; A first camera unit for photographing at least two of the markers displayed on the optical image stabilization unit through a first camera unit inclined in both the first direction, the second direction and the third direction, 1 image detecting step; The first camera unit and the second camera unit are arranged in the first direction, the second direction and the third direction in a state of being separated from the first camera unit, A second image detecting step of photographing at least two of the plurality of markers and detecting second image information; An information extraction step of extracting a first marker displacement according to the movement of the marker in the first image information and a second marker displacement according to the movement of the marker in the second image information; And an information comparing step of calculating an actual displacement of the optical image stabilization unit based on the first marker displacement and the second marker displacement.

The inspection method of the optical camera shake correction unit according to the present invention further includes an image correction step of calculating a unit movement amount of the marker with the unit driving amount of the optical camera shake correction unit through the shake correction step.

The inspection method of the optical shake correction unit according to the present invention further includes an operation characteristic detection step of detecting an operation characteristic of the optical shake correction unit through the shake correction step.

Here, the information comparing step further compares the actual displacement with a predetermined limit displacement.

According to the inspection apparatus and the inspection method of the optical image stabilization unit according to the present invention, since the two camera units are arranged in a space formed by three axes orthogonal to each other, the required amount of the sensor can be reduced, In examining the optical camera shake correction unit, the entire algorithm is simplified, and the inspection of the optical camera shake correction unit can be performed quickly.

In addition, the use of two camera units significantly reduces the cost of core components and greatly reduces the manufacturing and maintenance cost of the inspection apparatus, and does not deteriorate inspection accuracy.

Further, the present invention can simplify the structure of the camera unit and acquire images quickly at the camera unit.

In addition, the present invention can adjust the recognition range for acquiring an image in the camera unit, and increase the frame rate while reducing the number of pixels of the image.

In addition, according to the present invention, since the depth of focus (Focus) and the frame rate are limited, it is possible to acquire images accurately and rapidly, and to acquire image information without converting images acquired due to a 1: It is easy to acquire.

In addition, the present invention can reduce the required amount of input channels in the data collecting unit.

Further, the present invention can monitor the operation state of the optical image stabilization unit and can be a basis for calculating the movement of the marker.

Further, the present invention can simplify the inspection algorithm by utilizing the unit movement amount of the marker, and shorten the inspection time as a whole.

The present invention can also check the operation characteristics of the optical image stabilization unit such as the performance of auto focus, the resonance frequency of auto focus, the performance of optical image stabilization, and the frequency response characteristic of optical image stabilization for the optical image stabilization unit.

1 is a front view showing an inspection apparatus of an optical image stabilization unit according to an embodiment of the present invention.
2 is a side view showing an inspection apparatus for an optical image stabilization unit according to an embodiment of the present invention.
3 is a plan view showing an inspection apparatus of an optical image stabilization unit according to an embodiment of the present invention.
FIG. 4 is a diagram showing the photographing state of a marker in the inspection apparatus of the optical image stabilization unit according to the embodiment of the present invention. FIG.
5 is a block diagram showing a control unit in an inspection apparatus of an optical image stabilization unit according to an embodiment of the present invention.
6 is a diagram showing a method of inspecting an optical image stabilization unit according to an embodiment of the present invention.

Hereinafter, an embodiment of an inspection apparatus and an inspection method of an optical image stabilization unit according to the present invention will be described with reference to the accompanying drawings. Here, the present invention is not limited or limited by the examples. Further, in describing the present invention, a detailed description of well-known functions or constructions may be omitted for clarity of the present invention.

FIG. 1 is a front view showing an inspection apparatus of an optical image stabilization unit according to an embodiment of the present invention, FIG. 2 is a side view showing an inspection apparatus of an optical image stabilization unit according to an embodiment of the present invention, FIG. 4 is a view showing a photographing state of a marker in an inspection apparatus of an optical image stabilization unit according to an embodiment of the present invention, and FIG. 5 is a block diagram showing the control unit in the inspection apparatus of the optical image stabilization unit according to the embodiment of the present invention.

1 to 5, an inspection apparatus for an optical image stabilization unit according to an embodiment of the present invention is an apparatus for inspecting whether or not a completed optical image stabilization unit 100 is defective.

Here, the optical image stabilization unit 100 performs a function of correcting the shape of the subject image formed on the image sensor so as not to fluctuate by changing the position of the optical lens or the image sensor through the driving unit in response to the external shake .

An inspection apparatus of an optical image stabilization unit according to an embodiment of the present invention includes an actuator 1, a first camera unit 2, and a second camera unit 3.

The actuator 1 moves the optical image stabilization unit 100 in at least one of three mutually orthogonal axial directions corresponding to the shake applied to the optical image stabilization unit 100. [

At this time, in the embodiment of the present invention, as the first camera unit 2 and the second camera unit 3 are applied, at least three markers M are displayed in the optical camera shake correction unit 100. The marker M may be displayed through a marker display step S9 described later. At least three of the parts of the optical image stabilization unit 100 can be utilized as the marker M. [

Here, the three axial directions orthogonal to each other include a first direction X, a second direction Y perpendicular to the first direction X, and a second direction Y perpendicular to the first direction X and the second direction Y And a third direction Z perpendicular to the imaginary plane including the Y-axis.

Accordingly, the actuator 1 is configured to move the optical image stabilization unit 100 in the first direction X, in the second direction Y perpendicular to the first direction X, in the first direction X, X) and the third direction (Z) perpendicular to the imaginary plane including the second direction (Y). In addition, the actuator 1 is provided with a mounting portion (not shown) to fix the optical image stabilization unit 100 in a fixed position.

The actuator 1 can be moved in at least one of the first direction X, the second direction Y and the third direction Z through various known driving means. have.

Here, the reference numeral 11 denotes a socket to which the actuator 1 is mounted, the reference numeral 12 denotes a stage in which the socket 11 is supported, and reference numeral 13 denotes a stage in which the stage 12, It is the base to be installed.

The first camera unit 2 is inclined in the first direction X, the second direction Y and the third direction Z so that the optical camera shake correction is performed in accordance with the operation of the actuator 1, (M1, M2) among the markers (M) displayed on the unit (100).

The second camera unit 3 is inclined in the first direction X, the second direction Y and the third direction Z in a state of being separated from the first camera unit 2 And at least one of the markers M1 and M2 picked up by the first camera unit 2 among the markers M displayed on the optical image stabilization unit 100 in accordance with the operation of the actuator 1 (M1, M3).

By constructing a dual camera through the first camera unit 2 and the second camera unit 3, stereovision is performed, and various types of image processing techniques are applied to simplify the calculation of the three-dimensional displacement .

In particular, the first camera unit 2 and the second camera unit 3 are disposed so as to cross each other with respect to the third direction Z and not face each other. If the first camera unit 2 and the second camera unit 3 are arranged symmetrically with respect to each other in the third direction Z to face each other, When the actual displacement is obtained, the matrix A, A1 and A2, which are experimental constants, form a singular matrix, so that the inverse matrix of the matrix A can not be obtained.

However, by making the direction in which the first camera unit 2 looks in the third direction Z and the direction in which the second camera unit 3 looks in the third direction Z mutually intersect, It is possible to prevent the matrix A, A1, A2 from being singularized, and accurately extract the actual displacement. In one embodiment of the present invention, the direction in which the first camera unit 2 looks in the third direction Z and the direction in which the second camera unit 3 looks in the third direction Z are shown in FIG. 3 They may be orthogonal to each other as illustrated.

Further, by adjusting the height of at least one of the first camera unit 2 and the second camera unit 3 to be small or large, the resolution for the actual displacement calculation of the optical camera shake correction unit 100 is adjusted , The amount of displacement of the marker M can be adjusted.

For example, when the height of the camera unit increases, the amount of displacement of the marker M with respect to the x-axis direction and the y-axis direction becomes large, and the amount of displacement of the marker M with respect to the z-axis direction becomes small. As another example, when the height of the camera unit is lowered, the amount of displacement of the marker M with respect to the x-axis direction and the y-axis direction becomes smaller and the amount of displacement of the marker M with respect to the z-axis direction becomes larger.

Further, by adjusting the angle of view of at least one of the first camera unit 2 and the second camera unit 3 to be small or large, it is possible to adjust the resolution for the actual displacement calculation of the optical camera shake correction unit 100 And the amount of displacement of the marker M can be adjusted.

For example, when the viewing angle of the camera unit becomes large, the amount of displacement of the marker M with respect to the x-axis direction and the y-axis direction becomes large, and the amount of displacement of the marker M with respect to the z- As another example, when the viewing angle of the camera unit becomes small, the amount of displacement of the marker M with respect to the x-axis direction and the y-axis direction becomes small and the amount of displacement of the marker M with respect to the z-axis direction becomes large.

In other words, by adjusting the angle of view of at least one of the first camera unit (2) and the second camera unit (3) to be small or large, And the crosstalk in either the second direction (Y) or the third direction (Z). Wherein the viewing angle is set such that the first camera unit (2) or the second camera unit (3) is positioned in the first direction (X), the second direction (Y) M represents the angle at which the first camera unit 2 or the second camera unit 3 is tilted with respect to the stage 12 when photographing the optical image stabilization unit 100 including the camera shake correcting unit 100, Since the viewing angle of the camera unit is from 30 degrees to 60 degrees, the amount of displacement of the marker M can be extracted stably. At this time, if the visual angle is smaller than 30 degrees or larger than 60 degrees, the displacement amount of the marker M is too small or the displacement amount of the marker M can not be extracted. In one embodiment of the present disclosure, the viewing angle of the camera unit may be 45 degrees.

The first camera unit 2 and the second camera unit 3 each have a magnification of 1: 1, a depth of focus of 1 to 2 mm, and a frame rate of It is possible to improve the image accuracy of the marker M obtained by being made to be 100 Hz to 10 KHz. In particular, the frame rate may be 300 Hz or more.

Particularly, when the magnification is not 1: 1, there is a disadvantage in that the additional formula according to the magnification is required when calculating the movement amount of the marker M. However, when the magnification is 1: 1, The calculation of the movement amount of the marker M can be smoothly performed by utilizing the state shown in the image.

It is also difficult to extract the shape of the marker M from the obtained image when the depth of focus is out of the allowable range (1 to 2 mm). When calculating the movement amount of the marker M, However, if the Depth Of Focus is adjusted to the allowable range (1 to 2 mm), the extraction of the shape of the marker (M) from the acquired image is easy When the amount of movement of the marker M is calculated, it is possible to prevent the error range from being increased, thereby improving the inspection accuracy.

In addition, when the frame rate is out of the allowable range (100 Hz to 10 KHz), the position of the marker M may be missed in the operation of the actuator 1 corresponding to the camera shake, Is maintained at 100 Hz to 10 KHz, it is possible to prevent the position of the marker M from being missed in the operation of the actuator 1 corresponding to the camera-shake due to high-speed shooting.

The first camera unit 2 and the second camera unit 3 include a microscope lens unit, a relay lens unit, and a camera unit, respectively.

The microscope lens unit magnifies the incident image. Here, the microscope lens unit includes a first microscope lens unit 21 for enlarging an image to be incident on the first camera unit 2, a second microscope lens unit 21 for enlarging an image to be incident on the second camera unit 3, (31). Then, the image input to the microscope lens unit can be represented by the shape of the optical image stabilization unit 100 including the marker M. In addition, the image input to the microscope lens unit can display only the area where the marker M is displayed in the shape of the optical image stabilization unit 100 according to the operation of the section setting unit, which will be described later.

The relay lens unit images the image magnified by the microscope lens unit. The relay lens unit includes a first relay lens unit 22 for imaging the image magnified by the first microscope lens unit 21 in the first camera unit 2 and a second relay lens unit 22 for imaging the second camera unit 3 And a second relay lens unit 32 for imaging the image magnified by the second microscope lens unit 31 at a predetermined angle.

The camera unit acquires the image formed by the relay lens unit. The camera unit may be constituted by the image sensor described above. Here, the camera unit includes a first camera unit 23 for acquiring the image formed by the first release lens unit 22, a second camera unit 23 for acquiring the image formed by the second release lens unit 32, And a camera unit 33.

The first camera unit 2 and the second camera unit 3 may further include a section setting unit.

The section setting unit moves at least one of the microscope lens unit, the relay lens unit, and the camera unit so that the camera recognizes only the area where the marker M is displayed among the images. Here, the interval setting unit may set the interval between the first microscope lens unit 21 and the first relay lens unit 22 so that the first camera unit 23 recognizes only the area where the marker M is displayed, A first section setting section 24 for moving at least one of the first camera section 23 and a second camera setting section 24 for allowing the second camera section 33 to recognize only an area in which the marker M is displayed, And a second section setting section 34 for moving at least one of the second microscope lens section 31, the second relay lens section 32, and the second camera section 33. Since the size of the image can be reduced while the magnification is maintained in the final acquired image, the frame rate can be improved by reducing the time required to acquire the image by the camera unit 33. [

The inspection apparatus of the optical image stabilization unit according to an embodiment of the present invention may further include a position adjustment unit.

The position adjustment unit may be configured to position the first camera unit 2 and the second camera unit 3 in the first direction (the first direction) so that the first camera unit 2 and the second camera unit 3 are positioned, respectively, X) in the second direction (Y) and the third direction (Z). The position adjusting unit adjusts the first camera unit 2 in the first direction X, the second direction Y, and the third direction Z so that the first camera unit 2 is correctly positioned. And a second position adjusting unit which moves the second camera unit in the first direction and the second direction so that the second camera unit is correctly positioned, And a second position adjustment unit 35 for moving the second position adjustment unit 35 in the third direction Z. [ The position adjustment unit adjusts the installation positions of the first camera unit 2 and the second camera unit 3 through the three-axis control so that the first camera unit 2 and the second camera unit 3, Respectively.

The inspection apparatus of the optical image stabilization unit according to an embodiment of the present invention may further include a control unit 5. [

Wherein the control unit (5) has a first marker displacement which is extracted from the first image information photographed by the first camera unit (2) and a second marker displacement which is extracted from the second image information photographed by the second camera unit The actual displacement of the optical image stabilization unit 100 is calculated based on the marker displacement.

Here, the first marker displacement may be represented by the movement of the marker M extracted from the image acquired by the first camera unit 23. [ In this case, the first marker displacement may be defined as a coordinate value of the marker M extracted from the image acquired by the first camera unit 23. Here, the image acquired by the first camera unit 23 may be represented by the first image information.

The second marker displacement may be represented by the movement of the marker M extracted from the image acquired by the second camera unit 33. In this case, the second marker displacement may be defined as a coordinate value of the marker M extracted from the image acquired by the second camera unit 33. The image acquired by the second camera unit 33 may be represented by the second image information.

The control unit 5 is provided with four input channels. Here, signals measured by the first camera unit 2 and the second camera unit 3 are input to two input channels among the four input channels. The operating characteristics of the optical image stabilization unit 100 and signals to be measured by the driving amount measuring unit 4, which will be described later, are input to the remaining two input channels of the four input channels.

The control unit 5 includes a camera shake reproducing unit 51 for applying an operation signal to the actuator 1 and a camera shake reproducing unit 51 for extracting the first marker displacement from the first image information photographed by the first camera unit 2 A second information extracting unit (57) for extracting the second marker displacement from the second image information photographed by the second camera unit (3), a second information extracting unit A data acquisition unit (54) in which the second image information, the first marker displacement and the second marker displacement are stored in association with each other; and a data acquisition unit (54) for acquiring the first marker displacement and the second marker displacement, And an information comparator 55 for calculating an actual displacement of the shake correction unit.

The first marker M1 and the second marker M2 are displayed in the first image information on the photographing area 2a of the first camera unit 2. [ The first marker M1 and the third marker M3 are displayed in the second image information of the photographing area 3a of the second camera unit 3. [

The fourth marker M4 may be additionally used depending on the arrangement structure of the first camera unit 2 and the second camera unit 3.

For the matrix P1 according to the first marker displacement obtained through the first image information,

이다.

to be.

Here, P1x1 is the x direction displacement of the first marker M1 in the first image information, P1y1 is the y direction displacement of the first marker M1 in the first image information, P1x2 is the displacement in the y direction of the first marker M1, Direction displacement of the second marker M2, and P1y2 is the y-directional displacement of the second marker M2 in the first image information

이다.Further, for the matrix X according to the actual displacement,

to be.

Here, Xr is the x direction displacement, Yr is the y direction displacement, Zr is the z direction displacement, Rpi is the tilt displacement with respect to the x axis, Rtheta is the tilt displacement with respect to the y axis, .

Then, a relation between (P1) = (A1) (X) is established between the matrix P1 and the matrix X. [

로 정의할 수 있다.Here, the matrix A1 is an experimental constant,

.

이다.Similarly, for the matrix P2 according to the second marker displacement obtained through the second image information,

to be.

Here, P2x1 is the x direction displacement of the first marker M1 in the second image information, P2y1 is the y direction displacement of the first marker M1 in the second image information, P2x3 is the displacement in the second image information of the third marker M1, Direction displacement of the third marker M3, and P2y3 is the y-direction displacement of the third marker M3 in the second image information

Then, a relation between (P2) = (A2) (X) is established between the matrix P2 and the matrix X. [

로 정의할 수 있다.Here, the matrix A2 is an experimental constant,

.

The matrix P according to the first marker displacement and the second marker displacement represents the 8 rows and 1 column by arranging the matrix P1 and the matrix P2 in the column direction. Also, matrix A, which is an experimental constant, represents matrix 8 and matrix 6 by arranging matrix A1 and matrix A2 in the column direction. Also, the matrix X according to the actual displacement represents 6 rows and 1 column.

Then, a relation of (P) = (A) (X) holds between the matrix P and the matrix X. [

을 계산함으로써, 실제변위를 계산할 수 있다.Thus, for matrix X

The actual displacement can be calculated.

The control unit 5 or the information comparator 55 may further compare the actual displacement and the predetermined limit displacement.

As a result of the comparison performed by the information comparator 55, when the actual displacement is within the range of the predetermined limit displacement, the optical camera shake correction unit 100 can be judged as normal.

When the actual displacement is out of the range of the predetermined limit displacement as a result of the comparison performed by the information comparator 55, the optical shake correction unit 100 can determine that the optical shake correction unit 100 is defective.

The control unit 5 further includes an image correction unit 56 for calculating a unit movement amount of the marker M with a unit driving amount of the optical image stabilization unit 100 according to the operation of the actuator 1 . The unit driving amount of the optical image stabilization unit 100 according to the operation of the actuator 1 is a distance that the actuator 1 moves the optical image stabilization unit 100 by a unit length in each axial direction, The unit movement amount of the marker M indicates a distance of movement of the marker M on the image.

Then, the camera shake regenerating unit 51 moves the optical camera shake correction unit 100 by a unit length instead of the operation of the actuator 1 corresponding to the shaking motion. At this time, when the optical image stabilization unit 100 is photographed through the camera unit 3, the initial position of the marker M and the image position of the optical image stabilization unit 100 are displayed on the image according to a magnification of 1: The position at which the marker M is moved corresponding to the moving distance is displayed. Accordingly, the image correcting unit 56 calculates the unit movement amount of the marker M by the unit driving amount of the actuator 1, thereby calculating the distance traveled mechanically by the actuator 1, Wherein when the first marker displacement and the second marker displacement are compared with an actual displacement based on the first marker displacement and the second marker displacement, the first marker displacement and the second marker displacement And the predetermined limit displacement, and it is possible to conveniently calculate the displacement of each information.

The inspection apparatus of the optical camera shake correction unit according to an embodiment of the present invention may further include a drive amount measurement unit 4. [

The drive amount measurement unit 4 measures the drive amount of the optical image stabilization unit 100 operated by the actuator 1. [ The driving amount measuring unit 4 is provided on the actuator 1 side and can measure the driving amount of the optical image stabilization unit 100. [ The drive amount measuring unit 4 can measure the distance that the optical lens of the optical image stabilization unit 100 or the image sensor moves. The driving amount measuring unit 4 can measure the unit driving amount of the actuator 1. [ The drive amount measuring unit 4 may be constituted by a hall sensor. At this time, the data collection unit 54 stores the first image information, the second image information, the first marker displacement, the second marker displacement, and the drive amount in association with each other.

Here, the control unit 5 may further include a signal amplifying unit 52 for amplifying a signal obtained by the driving amount measuring unit 4. The signal amplifying unit 52 removes the noise included in the signal obtained by the driving amount measuring unit 4, prevents noise generated when the signal is transmitted, and improves the reliability of the operating characteristic .

Now, an inspection method of the optical image stabilization unit according to an embodiment of the present invention will be described. 6 is a diagram showing a method of inspecting an optical image stabilization unit according to an embodiment of the present invention.

1 to 6, an inspection method of an optical image stabilization unit according to an embodiment of the present invention is performed by using the optical image stabilization unit inspection apparatus according to an embodiment of the present invention, ) Is described.

The method of inspecting an optical image stabilization unit according to an embodiment of the present invention includes an image stabilization step S1, a first image detection step S3, a second image detection step S4, an information extraction step S5, And an information comparison step S6.

At this time, in the embodiment of the present invention, as the first camera unit 2 and the second camera unit 3 are applied, at least three markers M are displayed in the optical camera shake correction unit 100. The marker M may be displayed through a marker display step S9 described later. At least three of the parts of the optical image stabilization unit 100 can be utilized as the markers.

The camera shake correction step S1 is a step of correcting the optical shake correction unit 100 in a first direction X and in a second direction Y perpendicular to the first direction X and in the first direction X, Is moved in at least one of a third direction (Z) perpendicular to a virtual plane including the second direction (Y). The shaking motion reproducing step S1 may be performed by operating the actuator 1 in accordance with an operation signal of the shaking motion reproducing section 51. [

The first image detecting step S3 is a step of detecting the optical image shake through the first camera unit 2 which is inclined in both the first direction X, the second direction Y and the third direction Z, At least two (M1, M2) of the markers M displayed on the correction unit 100 are photographed to detect the first image information.

When the actuator 1 is operated according to an operation signal of the camera shake regenerating unit 51, the first camera unit 2 detects the first camera unit 2 including the marker M The first image information can be detected by photographing the optical image stabilization unit 100 at 100 Hz to 10 kHz.

The second image detecting step S4 may detect the second camera unit 3 through the second camera unit 3 which is inclined in the first direction X, the second direction Y and the third direction Z, (M1, M3) including at least one (M1) of the markers (M1, M2) taken on the first camera unit (2) among the markers (M) displayed on the correction unit And detects the second image information.

When the actuator 1 is operated in accordance with an operation signal of the camera shake regenerating unit 51, the second camera unit 3 detects the second image including the marker M The second image information can be detected by photographing the optical image stabilization unit 100 at 100 Hz to 10 kHz.

The information extracting step (S5) extracts a first marker displacement according to the movement of the marker in the first image information and a second marker displacement according to the movement of the marker in the second image information. The information extracting step S5 may be performed according to the operation of the information extracting unit 57. [ The information extracting step S5 may detect coordinate values of the marker M through various types of image processing.

The information comparing step (S6) calculates the actual displacement of the optical image stabilization unit based on the first marker displacement and the second marker displacement. The information comparison step S6 may be performed according to the operation of the information comparison unit 55. [

The information comparison step S6 may further compare the actual displacement with a predetermined limit displacement.

As a result of the comparison in the information comparison step S6, when the actual displacement is within the range of the predetermined limit displacement, the optical camera shake correcting unit 100 can judge to be normal.

In addition, when the actual displacement is out of the range of the predetermined limit displacement as a result of the comparison in the information comparing step S6, the optical camera shake correction unit 100 can judge to be defective.

The inspection method of the optical image stabilization unit according to an embodiment of the present invention may further include an operation characteristic detection step (S2).

The operation characteristic detection step (S2) detects the operation characteristic of the optical camera shake correction unit (100) through the shake correction step (S1). The operation characteristic detection step S2 can detect the operation characteristic by using the operation state of the optical camera shake correction unit 100 when the actuator 1 is operated under the control of the control unit 5 . For example, the control unit 5 detects a signal according to the operation of the optical lens or the image sensor in the optical image stabilization unit 100, and can utilize the signal as the operation characteristic.

When the actuator 1 is operated under the control of the control unit 5, the control unit 5 may be provided with a control unit 5 for controlling the operation of the optical image stabilization unit 100, The signal is collected. For example, the operation state of the optical image stabilization unit 100 is stored in the data collection unit 54. [ Therefore, the operation characteristic can be detected based on the signal collected in the control unit 9. [

The inspection method of the optical image stabilization unit according to an embodiment of the present invention may further include an image correction step (S8).

The image correction step S8 calculates a unit movement amount of the marker M with the unit driving amount of the optical image stabilization unit 100 through the shake reproducing step S1. The unit driving amount of the optical image stabilization unit 100 is a distance that the actuator 1 moves the optical image stabilization unit 100 by a unit length in each axial direction and the unit movement amount of the marker M is Represents the distance the marker M moves on the image.

In the image correction step S8, the camera shake regenerating unit 51 moves the optical camera shake correction unit 100 by the unit length instead of the operation of the actuator 1 corresponding to the shaking motion. At this time, when the optical image stabilization unit 100 is photographed through the camera unit 3, the initial position of the marker M on the image and the initial position of the optical image stabilization unit 100 The position at which the marker M is moved corresponding to the moving distance is displayed. Accordingly, the image correcting unit 56 calculates the unit movement amount of the marker M by the unit driving amount of the actuator 1, thereby calculating the distance traveled mechanically by the actuator 1, When the actual displacement of the optical image stabilization unit is extracted based on the first marker displacement and the second marker displacement and is compared with a predetermined limit displacement, And provides the basis of the displacement, the second marker displacement, and the predetermined limit displacement, and it is possible to conveniently calculate the displacement of each information.

The inspection method of the optical image stabilization unit according to an embodiment of the present invention may further include a marker display step (S9).

The marker display step S9 displays at least two markers on the optical image stabilization unit 100 prior to the image correction step S8. The marker display step S9 may be displayed either by the user or by another display means (not shown).

The inspection method of the optical image stabilization unit according to an embodiment of the present invention may further include a failure determination step (S7). The failure determination step S7 determines whether or not the optical image stabilization unit 100 is defective after the information comparison step S6. The failure judgment step S7 may be carried out under the control of the control unit 5. [

For example, the failure determination step S7 can determine whether or not the optical image stabilization unit 100 is defective based on the predetermined limit displacement. When the actual displacement is within the range of the predetermined limit displacement as a result of the failure determination step S7, it is possible to determine that the optical image stabilization unit 100 is normal. In addition, when the actual displacement is out of the range of the predetermined limit displacement as a result of the failure determination step S7, the optical camera shake correction unit 100 can determine that it is defective.

As another example, the failure determination step S7 can determine whether or not the optical image stabilization unit 100 is defective based on the variation amount for each piece of detected information. If the variation amount is not found through the failure determination step S7, it is possible to determine that the optical image stabilization unit 100 is normal. In addition, when the variation amount is generated through the failure determination step S7, it is possible to determine that the optical image stabilization unit 100 is defective.

 As another example, the failure determination step S7 can determine whether or not the optical image stabilization unit 100 is defective based on the variation amount for each detected information and the predetermined limit displacement. It is possible to judge that the optical image stabilization unit 100 is normal when the variation amount is within the range of the predetermined limit displacement as a result of the failure determination step S7. In addition, when the variation amount exceeds the predetermined limit displacement range as the defect determination step S7 is performed, it is possible to determine that the optical image stabilization unit 100 is defective.

After the information comparison step S6 or the failure determination step S7 has been performed, the power applied to the optical image stabilization unit 100 and the actuator 1 is cut off, The camera shake correcting unit 100 is disconnected.

Then, after the new optical image stabilization unit 100 is fixed in position to the actuator 1, the above-described inspection method can be repeated by applying power to the optical image stabilization unit 100 and the actuator 1 have.

According to the inspection apparatus and the inspection method of the optical image stabilization unit described above, since the first camera unit 2 and the second camera unit 3, which are disposed in the space formed by three axes orthogonal to each other, It is possible to reduce the required amount of the sensor and to check the optical image stabilization unit 100 to simplify the entire algorithm and to perform the inspection of the optical image stabilization unit 100 quickly. Further, by using the first camera unit 2 and the second camera unit 3, it is possible to greatly reduce the cost of the core parts compared with the prior art, greatly reduce manufacturing and maintenance costs for the inspection apparatus, It does not deteriorate.

It is also possible to simplify the structure of the first camera unit 2 and the second camera unit 3 and acquire images quickly from the first camera unit 2 and the second camera unit 3 . In addition, the first camera unit 2 and the second camera unit 3 can adjust a recognition range for acquiring an image, thereby reducing a pixel of an image and increasing a frame rate. In addition, by limiting the depth of focus (Focus) and the frame rate, it is possible to acquire images accurately and quickly, while easily acquiring image information without converting an acquired image due to a 1: 1 magnification ratio .

Also, the data collection unit 54 can reduce the required amount of the input channel. Further, it is possible to monitor the operation state of the optical image stabilization unit 100, and can be a basis for calculating the movement of the marker M. [ Further, the inspection algorithm can be simplified by utilizing the unit movement amount of the marker M, and the whole inspection time can be shortened.

In addition, even the operating characteristics of the optical image stabilization unit 100 such as the performance of auto focus, the resonance frequency of auto focus, the performance of optical image stabilization correction, the frequency response characteristic of optical image stabilization, Can be inspected.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Modify or modify the Software.

X: first direction Y: second direction Z: third direction
1: actuator 2: first camera unit 21: first microscope lens unit
22: first relay lens unit 23: first camera unit 24: first interval setting unit
3: second camera unit 31: second microscope lens unit 32: second relay lens unit
33: second camera section 34: second section setting section 4:
5: control unit 51: camera shake reconstruction unit 52: signal amplification unit
53: first information extracting unit 54: data collecting unit 55: information comparing unit
56: Image correction unit 57: Second information extraction unit 100: Optical image stabilization unit
S1: camera-shake reproducing step S2: operation characteristic detecting step S3: first image detecting step
S4: second image detection step S5: information extraction step S6: information comparison step
S7: Bad determination step S8: Image correction step S9: Marker display step

Claims (14)

An inspection apparatus for inspecting an optical image stabilization unit,
At least three markers are displayed on the optical image stabilization unit,
The optical image stabilization unit is moved in a direction of at least one of a first direction, a second direction perpendicular to the first direction, and a third direction perpendicular to the imaginary plane including the first direction and the second direction An actuator for moving the actuator;
A first camera unit disposed obliquely both in the first direction, the second direction, and the third direction to photograph at least two of the markers displayed on the optical image stabilization unit in accordance with the operation of the actuator;
And a second camera unit that is disposed at an angle to the first direction, the second direction, and the third direction in a state of being spaced apart from the first camera unit, wherein, in accordance with an operation of the actuator, A second camera unit for photographing at least two of the at least one of the plurality of markers; And
The actual displacement of the optical image stabilization unit based on the first marker displacement extracted from the first image information captured by the first camera unit and the second marker displacement extracted from the second image information captured by the second camera unit And a control unit,
Wherein the first camera unit and the second camera unit are arranged so as to cross each other with respect to the third direction so as not to face each other. The method according to claim 1,
Each of said first camera unit and said second camera unit comprising:
A microscope lens unit for enlarging an incident image;
A relay lens unit for imaging the image magnified by the microscope lens unit; And
And a camera unit for acquiring the image formed by the relay lens unit. 3. The method of claim 2,
Each of said first camera unit and said second camera unit comprising:
And a section setting unit for moving at least one of the microscope lens unit, the relay lens unit, and the camera unit so that the camera recognizes only the area of the image in which the marker is displayed. Inspection device of the unit. The method according to claim 1,
Each of said first camera unit and said second camera unit comprising:
A magnification of 1: 1,
The depth of focus (depth of focus) is 1 to 2 mm,
Wherein the frame rate is in a range of 100Hz to 10KHZ. The method according to claim 1,
Wherein the control unit comprises:
A shake reproducing portion for applying an operation signal to the actuator;
A first information extracting unit for extracting the first marker displacement from first image information photographed by the first camera unit;
A second information extracting unit for extracting the second marker displacement from second image information captured by the second camera unit;
A data collector for storing the first image information, the second image information, the first marker displacement and the second marker displacement in association with each other; And
And an information comparator for calculating an actual displacement of the optical image stabilization unit based on the first marker displacement and the second marker displacement. 6. The method of claim 5,
And a drive amount measuring unit for measuring a drive amount of the optical image stabilization unit operated by the actuator,
Wherein the data collecting unit comprises:
And stores the first image information, the second image information, the first marker displacement, the second marker displacement, and the drive amount in association with each other. The method according to claim 6,
Wherein the control unit comprises:
And an image correction unit for calculating a unit movement amount of the marker with a unit driving amount of the optical image stabilization unit according to the operation of the actuator. 8. The method according to any one of claims 1 to 7,
Wherein the control unit comprises:
And further compares the actual displacement with a predetermined limit displacement. delete 8. The method according to any one of claims 1 to 7,
Wherein at least one of the first camera unit and the second camera unit comprises:
Wherein the height of the camera unit is adjusted or the viewing angle of the camera unit is adjusted so as to adjust the resolution for the calculation of the actual displacement of the optical camera shake correction unit. An inspection method for inspecting an optical image stabilization unit,
At least three markers are displayed on the optical image stabilization unit,
The optical image stabilization unit is moved in a direction of at least one of a first direction, a second direction perpendicular to the first direction, and a third direction perpendicular to the imaginary plane including the first direction and the second direction A shaking motion reproducing step;
A first camera unit for photographing at least two of the markers displayed on the optical image stabilization unit through a first camera unit inclined in both the first direction, the second direction and the third direction, 1 image detecting step;
The first camera unit and the second camera unit are arranged in the first direction, the second direction and the third direction in a state of being separated from the first camera unit, A second image detecting step of photographing at least two of the plurality of markers and detecting second image information;
An information extraction step of extracting a first marker displacement according to the movement of the marker in the first image information and a second marker displacement according to the movement of the marker in the second image information; And
And an information comparing step of calculating an actual displacement of the optical image stabilization unit based on the first marker displacement and the second marker displacement,
Wherein the first camera unit and the second camera unit are arranged so that they do not face each other in the first direction and the second direction in the first image detection step and the second image detection step, method of inspection. 12. The method of claim 11,
And an image correction step of calculating a unit movement amount of the marker with the unit driving amount of the optical image stabilization unit through the shaking motion reproduction step. 12. The method of claim 11,
And an operation characteristic detection step of detecting an operation characteristic of the optical camera shake correction unit through the shake correction step. 14. The method according to any one of claims 11 to 13,
The information comparison step may include:
Further comprising the step of comparing the actual displacement with a predetermined limit displacement.

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