CN112543321B - Position compensation detection and correction method, camera module and manufacturing method thereof - Google Patents
Position compensation detection and correction method, camera module and manufacturing method thereof Download PDFInfo
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- CN112543321B CN112543321B CN201910897691.2A CN201910897691A CN112543321B CN 112543321 B CN112543321 B CN 112543321B CN 201910897691 A CN201910897691 A CN 201910897691A CN 112543321 B CN112543321 B CN 112543321B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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Abstract
The application provides a method for detecting a position compensation amount of an optical lens, a method for correcting the optical lens, a camera module and a method for manufacturing the camera module. The detection method comprises the following steps: determining a first position of an optical lens of the camera module relative to an image sensor of the camera module based on a first reference image shot by the horizontally placed camera module; determining a second position of the optical lens relative to the image sensor based on a second reference image shot by the vertically-placed camera module; and determining a position compensation amount of the optical lens based on a deviation between the first position and the second position.
Description
Technical Field
The present invention relates to the field of optical devices, and more particularly, to a method for detecting a position compensation amount of an optical lens, a method for correcting an optical lens, a camera module, and a method for manufacturing a camera module.
Background
In recent years, camera modules are used as essential components of terminal devices such as mobile phones, and are used for meeting the requirements of users on photographing and the like. On one hand, the requirement of the client on the shooting performance of the camera module of the mobile phone is higher and higher; on the other hand, customers want the mobile phones to be light and thin, which makes the space for accommodating the camera module in the mobile phones smaller and smaller.
A typical mobile phone with an auto-focus function is provided with a Voice Coil Motor (VCM), which includes a Coil disposed in a permanent magnetic field, wherein the Coil is fixed by a spring plate, and the position of a lens carried by the spring plate is changed by changing the direct current intensity of the Coil to control the stretching position of the spring plate. The VCM can control the distance between the lens and the image sensor in the camera module. In order to solve the problem of Image shift due to gravity, shaking, or the like when a handheld mobile phone captures an Image, an Optical Image Stabilization (OIS) motor is generally provided. A common OIS motor includes a VCM, a gyroscope for measuring the degree of hand trembling, and a plurality of hall elements for measuring the relative position between the optical lens and the image sensor.
Because of the existence of a plurality of Hall elements, a plurality of pins need to be led out, so that the OIS motor has the advantages of complex structure, larger volume, high production process difficulty, low yield and high cost.
Disclosure of Invention
In one aspect, the present application provides a method for detecting a position compensation amount of an optical lens, including: determining a first position of an optical lens of the camera module relative to an image sensor of the camera module based on a first reference image shot by the horizontally placed camera module; determining a second position of an optical lens of the camera module relative to the image sensor based on a second reference image shot by the vertically placed camera module; and determining a position compensation amount of an optical lens of the camera module based on the deviation between the first position and the second position.
In one embodiment, the horizontal placement refers to a placement direction in which the surface of the image sensor is substantially parallel to the ground. In this case, the optical axis of the optical lens of the image pickup module extends substantially in the vertical direction. Likewise, the vertical placement refers to a placement direction in which the surface of the image sensor is approximately perpendicular to the ground. In this case, the optical axis of the optical lens of the image pickup module extends substantially in the horizontal direction.
In one embodiment, determining a first position of an optical lens of a camera module relative to an image sensor of the camera module comprises: determining a usable area in a first reference image; determining at least one circle having a uniform brightness distribution based on a portion of the first reference image in the usable area; determining a position of a brightness center based on at least one circle having a uniform brightness distribution; a first position of the optical lens relative to the image sensor is determined based on the position of the center of brightness.
In one embodiment, determining the amount of position compensation for the optical lens comprises: the opposite of the deviation is determined as the position compensation amount.
In one embodiment, the first position is a position where an optical axis of the optical lens coincides with a geometric center of a photosensitive area of the image sensor.
In one embodiment, the second position is a position where the optical axis of the optical lens is offset from a geometric center of a photosensitive region of the image sensor.
In one embodiment, the method for detecting the position compensation amount of the optical lens further includes: before the module of making a video recording shoots, set up the range extender between the module of making a video recording and the target of being shot.
In one embodiment, the method for detecting the position compensation amount of the optical lens further includes: before the module of making a video recording shoots, adjust the module of making a video recording and the distance between the target of being shot.
In one embodiment, the imaging module is fixed to the rotating mechanism, and the method for detecting the position compensation amount of the optical lens before shooting by the vertically placed imaging module further includes: the camera shooting module placed horizontally is rotated to be a vertically placed camera shooting module through the rotating mechanism.
In a second aspect, the present application provides a method for correcting an optical lens. The correction method comprises the following steps: detecting the inclination of the optical lens; the position of the optical lens is adjusted based on the detected inclination and the position compensation amount of the optical lens determined according to the detection method of the position compensation amount of the optical lens.
In one embodiment, detecting the tilt of the optical lens comprises: the inclination of the optical lens is detected by a gyroscope.
In one embodiment, the camera module includes a translational suspension system for suspending the optical lens, and adjusting the position of the optical lens includes: and adjusting the position of the optical lens suspended on the translational suspension system by controlling the translational suspension system based on the position compensation amount.
The third aspect, the present application provides a camera module, which includes: a memory for storing the position compensation amount of the optical lens determined according to the detection method of the position compensation amount of the optical lens; a lens base; an optical lens; and a translational suspension system that suspends the optical lens on the lens base and adjusts a position of the optical lens based on a position compensation amount of the optical lens.
In one embodiment, the translational suspension system adjusts the position of the optical lens based on the amount of position compensation of the optical lens and the tilt of the optical lens.
In one embodiment, the camera module further comprises: an auto-focus motor by which the optical lens is coupled to the translational suspension system; the automatic focusing motor is used for driving the optical lens to move along the optical axis direction of the optical lens.
In a fourth aspect, the present application provides a method for manufacturing a camera module, including: assembling a module to be detected; detecting the module to be detected according to the detection method; and storing the position compensation quantity to a module to be detected to obtain a camera module.
The method for detecting the position compensation quantity of the optical lens can accurately detect the position compensation quantity of the optical lens, is used for manufacturing the camera module with higher imaging quality and simpler structure, and provides a good basis for better correcting the position of the optical lens.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view showing a state in which a camera module is horizontally placed according to an embodiment of the present application;
fig. 2 is a schematic structural view showing a state in which a camera module according to an embodiment of the present application is vertically placed;
fig. 3 shows a schematic flowchart of a method of detecting a position compensation amount of an optical lens according to an embodiment of the present application;
FIG. 4 shows a schematic flow chart of step S1210 in FIG. 3;
FIG. 5 shows a schematic flow chart of step S1220 in FIG. 3;
fig. 6 shows a schematic flow chart of a method of correcting an optical lens according to an embodiment of the present application;
fig. 7 shows a block diagram of a photographing apparatus according to an embodiment of the present application; and
FIG. 8 shows a block diagram of an electronic device according to an embodiment of the application.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that the expressions first, second, etc. in this specification are used only to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, a first position discussed below may also be referred to as a second position without departing from the teachings of the present application. And vice versa.
In the drawings, the thickness, size and shape of the components have been slightly adjusted for convenience of explanation. The figures are purely diagrammatic and not drawn to scale. For example, the offset distance of the optical lens is not the offset distance in the actual correction process. As used herein, the terms "approximately," "about," and the like are used as table approximation terms, not as table degree terms, and are intended to account for inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including engineering and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. In addition, unless explicitly defined or contradicted by context, the specific steps included in the methods described herein are not necessarily limited to the order described, but can be performed in any order or in parallel.
The following describes a method for detecting a position compensation amount of an optical lens provided in the present application in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, the camera module 2 of the present application includes a lens base 21. The lens base 21 includes a base plate 213, a lens fixing part 212, and a housing 211 fixedly connected. The lens holder 212 includes an opening for transmitting light and a filter covering the opening.
An image sensor 23 is fixed to the inner side of the bottom plate 213, and the image sensor 23 has a photosensitive area. The image sensor 23 may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), and the photosensitive region may be rectangular or may have other shapes.
The camera module 2 further comprises a translational suspension system 22, an autofocus motor 25, a lens carrier 28 and an optical lens 24. The optical lens 24 may comprise a multi-piece lens, and the optical lens 24 may be glued or otherwise fixedly attached to the lens carrier 28. The optical lens 24 may also include an aperture or the like. The autofocus motor 25 includes a stator coupled to the translational suspension system 22 and a mover. An autofocus motor 25 may be used to drive the mover in a linear motion. The optical lens 24 is fixedly connected to the mover, and an optical axis a of the optical imaging lens 24 may substantially coincide with a moving direction of the mover.
The translational suspension system 22 is used to move the autofocus motor 25, the lens carrier 28, and the optical lens 24 in a plane parallel to the photosensitive area to achieve an anti-shake function. In particular, the motion region may be a circle with a radius of 100 μm. And an autofocus motor 25 is used to implement the autofocus function of the optical lens 24.
Illustratively, the translational suspension system 22 includes a plurality of suspension wires, a first end of which is fixedly connected to the housing 211 of the lens base 21, and a second end of which is fixedly connected to the autofocus motor 25. The optical lens 24 is fixedly connected to an auto-focus motor 25, and both are suspended by a suspension wire with respect to the lens base 21.
The camera module 2 has the advantages of simple structure, small size, small manufacturing difficulty, low cost and the like.
In the using process, the optical lens 24 and the auto-focus motor 25 of the present application may shift under the action of gravity, so that when the camera module 2 works in different postures, the optical lens 24 may shift differently relative to the image sensor 23. For example, it may be translated in a plane parallel to the photosensitive area of the image sensor 23. The following provides a corresponding position compensation amount detection method and position correction method for correction of the translation.
Referring to fig. 1 to 5, a method S1200 for detecting a position compensation amount of an optical lens provided by the present application includes the following steps:
s1210, a first position of the optical lens 24 of the camera module 2 relative to the image sensor 23 of the camera module 2 is determined based on a first reference image taken by the horizontally placed camera module 2.
S1220, a second position of the optical lens 24 of the camera module 2 with respect to the image sensor 23 is determined based on a second reference image taken by the vertically-placed camera module 2.
S1230, based on the deviation between the first position and the second position, the position compensation amount of the optical lens 24 of the camera module 2 is determined.
The horizontal placement referred to in this application refers to a placement position as shown in fig. 1, in which the optical axis a of the optical lens 24 is substantially parallel to the vertical direction. The camera module 2 can capture the target 1 at the object side of the optical lens 24, so as to obtain a first reference image. The vertical placement referred to in this application refers to a placement position as shown in fig. 2, in which the optical axis a of the optical lens 24 is substantially perpendicular to the vertical line. The camera module 2 can capture the target 3 at the object side of the optical lens 24, so as to obtain a second reference image.
Specifically, referring to fig. 3 to 5, S1210 includes the following steps.
S1211, the camera module 2 is horizontally placed and the target 1 is photographed. In this case, the light-sensing area of the image sensor 23 is placed substantially in the horizontal direction, while the normal line of the light-sensing area and the optical axis a of the optical lens 24 are substantially parallel to the vertical direction. The optical axis a of the optical lens 24 substantially coincides with a normal B passing through the geometric center of the photosensitive region. The light beam irradiates a photosensitive area of the image sensor 23 through the optical lens 24 of the camera module 2, and the image sensor 23 senses the received light in the photosensitive area, so as to generate a first reference image.
Specifically, the brightness in the first reference image is approximately centered on the brightness center and diffused around in the form of a circular wave. In the first reference image, the luminance value closer to the luminance center is larger, the luminance value farther from the luminance center is smaller, and positions equally distant from the luminance center have substantially the same luminance. Thus, a circle may be formed substantially at the same brightness value, and a plurality of circles formed at the same brightness value may be concentric circles.
S1212, a first position of the optical lens 24 with respect to the image sensor 23 is predicted by calculating a position of the luminance center of the first reference image.
Specifically, a usable region having a substantially uniform luminance distribution can be selected in the first reference image. Then, at least one circle with a uniform brightness distribution can be determined in the selected region. The position of the center of brightness is then predicted from the determined circle. Finally, the first position of the optical lens 24 with respect to the image sensor 23 is predicted based on the position of the luminance center.
Selecting a region having a substantially uniform brightness distribution avoids regions of brightness deviation that may be caused by factors such as the light path being blocked. The arrangement can also ensure that when a shielding object is found to shield the light path in the shooting process, a detector does not need to stop operating and remove the shielding object, and the detection is completed in a time-saving and labor-saving manner. In addition, such region selection may not necessarily perform an overall analysis of the luminance values of the entire first reference image, but may perform sampling in a predetermined local region of the first reference image, thereby also shortening the time to detect the amount of position compensation of the optical lens 24. In addition, the circle with the uniform brightness distribution is determined, so that the calculation amount is reduced, and the detection is completed in a time-saving and labor-saving mode.
After selecting an available area with approximately uniform brightness distribution in the first reference image, extracting a brightness set in the data set of the first reference image in the available area; obtaining a plurality of groups of brightness data which obey circular distribution from the extracted brightness set; then, performing circle fitting on the groups of brightness data subjected to circle distribution to obtain a plurality of fitting circles, and solving position data of the center of each fitting circle; further, an average value of the position data of the centers of the circles, that is, position data of the center of brightness, is calculated.
In addition, since each pixel point of the first reference image has a fixed corresponding position in the photosensitive area of the image sensor 23, the determined brightness center of the first reference image also has a corresponding position in the photosensitive area of the image sensor 23. And the position corresponding to the center of brightness has a certain relative positional relationship with the center point of the photosensitive area of the image sensor 23. Also, since the center of brightness of the first reference image corresponds to the optical axis a of the optical lens 24, the relative position of the optical axis a of the optical lens 24 and the center point of the photosensitive region of the image sensor 23 can be determined. Illustratively, the optical axis a of the optical lens 24 coincides with the center point of the photosensitive area of the image sensor 23.
By calculating multiple groups of brightness data, the deviation of the brightness data and errors brought by the fitting calculation process can be better eliminated, and the brightness center position determined based on the circle centers of multiple fitting circles is more accurate and credible.
As corresponding to the above-described method of obtaining the first location, S1220 of obtaining the second location includes the following steps.
S1221, the camera module 2 is placed in the vertical direction, and the target 3 is shot. In this case, the light-sensing area of the image sensor 23 is placed substantially in the vertical direction while the normal line of the light-sensing area and the optical axis a of the optical lens 24 are substantially parallel to the horizontal direction. The light beam passes through the optical lens 24 of the camera module 2 and irradiates on the photosensitive area of the image sensor 23, and the image sensor 23 senses the received light in the photosensitive area, so as to generate a second reference image.
S1222, predicting a second position of the optical lens 24 with respect to the image sensor 23 by calculating a position of the center of brightness of the second reference image. Specifically, the aforementioned method of calculating the position of the center of brightness of the first reference image may be referenced to predict the first position of the optical lens 24 with respect to the image sensor 23. Illustratively, the optical axis a of the optical lens 24 is offset downward with respect to the center point of the photosensitive area of the image sensor 23.
The order of steps S1210 and S1220 may be reversed, depending on the application. The position compensation amount of the optical lens 24 is derived based on the deviation value between the first position and the second position.
Illustratively, the first reference image and the second reference image have minimum pixel points, and the deviation of the second position from the first position is larger than one minimum pixel point. The amount of positional compensation of the optical lens 24 can be obtained at this time.
Based on the method for detecting the position compensation amount of the optical lens 24, the position deviation of the optical lens 24 relative to the image sensor 23 is predicted based on the brightness data of the first reference image and the brightness data of the second reference image, and time and labor are saved. The detection method provided by the application can effectively detect the position compensation amount required by the camera module 2 for adjusting the optical lens 24 when the camera module 2 works in different postures, so that the camera module 2 can be ensured to work circularly under the condition that the Hall element is lacked for positioning the optical lens 24.
In an exemplary embodiment, determining the position compensation amount of the optical lens 24 of the camera module 2 based on the deviation between the first position and the second position in step S1230 includes: the opposite number of the deviation is determined as the position compensation amount of the optical lens 24. Generally, the sign of the position compensation amount can be understood as the direction of compensation. Illustratively, if the deviation is in the form of a vector, the amount of position compensation may be a vector modulo the same but positioned opposite the vector representing the deviation.
In an exemplary embodiment, a planar rectangular coordinate system xoy is established at the photosensitive area of the image sensor 23, and the brightness center corresponding to the first position has coordinates (X) in the first reference image1,Y1) The brightness center corresponding to the second position has a coordinate (X) in the second reference image2,Y2) And the first position and the second position have an x-axis compensation value deltax and a y-axis compensation value deltay between them.
In the exemplary embodiment, the position where the projection of the optical center of the optical lens 24 on the image sensor 23 is located at the geometric center of the photosensitive area of the image sensor 23 is the first position. The camera module 2 that so sets up can make the image position of shooing accurate to the formation of image quality of visual field in the middle of promoting.
In an exemplary embodiment, the camera module 2 may be fixed to the rotation mechanism. S1200 further includes: the camera module is rotated to be vertically placed through the rotating mechanism. By rotating the camera module through the rotating mechanism, S1210 and S1220 can be smoothly performed, and the time spent on detection is reduced.
In an exemplary embodiment, the camera module 2 may be placed at other angles, for example, the normal of the light sensing area of the image sensor 23 is at an angle of 45 degrees with the vertical direction. It is possible to measure a third position between the optical lens 24 and the image sensor 23 and detect a position compensation amount of the third position. Illustratively, a function may be used to fit the amount of position compensation for each position between the first position and the second position.
In an exemplary embodiment, S1200 further includes: before the first reference image and the second reference image are shot, a distance-increasing lens is arranged between the camera module 2 and the shot target. The distance-increasing lens can simulate a long-distance light path test environment, and further is favorable for eliminating the influence of deviation between the optical axis A of the optical lens 24 of the camera module 2 to be tested and the center of the calibration pattern on the shot target.
In an exemplary embodiment, S1200 further includes: before the mark board is shot to the module 2 of making a video recording and obtaining first reference image to and before the module 2 of making a video recording is used to shoot the mark board and obtaining second reference image, adjust the module 2 of making a video recording and the distance between the mark board of being shot. The position compensation amount of the optical lens 24 of the camera module 2 of different types, different focal lengths, and the like can be adapted to the position of the camera module 2 by adjusting the position of the photographed target relative to the camera module 2.
An embodiment of the present application also provides an apparatus for detecting a position compensation amount of an optical lens, including: the device comprises a rotating mechanism, a horizontal target, a horizontal support, a vertical target, a vertical support, a light source assembly and a controller. The rotating mechanism clamps the camera module and drives the camera module to rotate. The rotation mechanism may include a horizontal state and a vertical state. When slewing mechanism was located the horizontality, the module of making a video recording was in horizontal position to the normal of the image sensor of the module of making a video recording is along vertical direction. When slewing mechanism is located vertical state, the module of making a video recording is in vertical position to the normal line of the image sensor of the module of making a video recording is along the horizontal direction.
The horizontal bracket is connected with the horizontal target and enables the horizontal target to translate in the vertical plane. The vertical frame is connected with the vertical target and enables the vertical target to translate in the horizontal plane. The light source component is used for illuminating the horizontal target and the vertical target. The target may take a variety of forms, such as an SFR target or an MTF target, among others.
The controller can communicate with the image sensor of the camera module, and respectively acquire the image of the horizontal target and the image of the vertical target through the image sensor.
The controller may calculate a first position and a second position based on the photographed image, and determine a position compensation amount based on a deviation between the first position and the second position.
The application also provides a manufacturing method of the camera module, which comprises the following steps: assembling a semi-finished product, namely a module to be detected, from the lens base, the optical lens, the translation suspension system and the memory; detecting the module to be detected according to the detection method to obtain the position compensation quantity; and storing the position compensation quantity into a memory of the module to be detected to obtain the camera module.
The camera module obtained by the manufacturing method can compensate the offset of the optical lens caused by the influence of gravity based on the pre-stored position compensation amount, so that the camera module can realize high-quality imaging in an open-loop state.
When the open-loop camera module is used, no matter the open-loop camera module is in a horizontal state or a vertical state, namely, no matter the normal of the image sensor 23 and the optical axis a of the optical lens 24 are both placed along the vertical direction or the horizontal direction, the position of the optical lens 24 relative to the image sensor 23 is not changed obviously, and therefore the stable imaging quality of the camera module is ensured.
For example, the amount of the position compensation can be stored in a permanent burning way or a rewritable way.
Referring to fig. 2 and 6, the present application provides a method 1000 for correcting an optical lens, which includes the following steps.
And S1100, detecting the inclination of the optical lens 24.
S1300, the position of the optical lens 24 is adjusted based on the detected tilt and the amount of position compensation of the optical lens 24 determined by the aforementioned detection method S1200.
The camera module 2 may have different attitudes when used for photographing. The optical lens 24 suspended by the translational suspension system 22 in the camera module 2 is displaced under the influence of gravity. The inclination of the camera module 2 is detected before shooting. Then, the position of the optical lens 24 may be adjusted based on the detected inclination and the above-described amount of position compensation. In this process, a threshold inclination can be preset. For example, the position of the optical lens 24 may be adjusted when the detected tilt exceeds a preset tilt threshold.
In an exemplary embodiment, adjusting the position of the optical lens 24 includes: the translational suspension system 22 of the camera module is adjusted based on the amount of position compensation to adjust the position of an optical lens 24 attached to the translational suspension system 22.
In an exemplary embodiment, the detecting the inclination of the optical lens 24 in step S1100 includes: the inclination of the optical lens 24 is detected by a gyroscope.
In an exemplary embodiment, when the optical lens 24 has different inclinations, the position of the optical lens 24 may be adjusted corresponding to invoking different amounts of position compensation.
Based on the correction method 1000 for the optical lens 24 provided by the application, the optical lens 24 can be corrected quickly and accurately by using a simple structure.
Referring to fig. 1 and 7, the present application further provides a camera module, including: a memory 26, the memory 26 storing the position compensation amount determined according to the aforementioned detection method S1200; a lens base 21; an optical lens 24; and a translational suspension system 22, the translational suspension system 22 suspending the optical lens 24 on the lens base 21 and adjusting the position of the optical lens 24 based on the amount of position compensation and the inclination of the optical lens 24.
The camera module 2 provided by the present application can correct the position of the optical lens 24 relative to the image sensor 23 by using the correction method 1000. The application provides a module 2 of making a video recording has stable position's optical lens 24, and then has higher image quality.
In an exemplary embodiment, the camera module 2 may further include an auto focus motor 25. The optical lens 24 is coupled to the translational suspension system 22 by an autofocus motor 25. In this case, the translational suspension system 22 suspends the autofocus motor 25 on the lens base 21 together with the optical lens 24. The autofocus motor 25 is used to drive the optical lens 24 to move in a direction parallel to the optical axis a of the optical lens 24.
Illustratively, the camera module 2 may be in data connection with the processor 4. Specifically, processor 4 is in communication with gyroscope 27, memory 26, autofocus motor 25, image sensor 23, and translational suspension system 22. Processor 4 may receive signals from each of gyroscope 27, memory 26, autofocus motor 25, and image sensor 23, and may also send signals to autofocus motor 25 and translational suspension system 22, respectively. The camera module described above can be adapted to a mobile terminal device such as a mobile phone.
Referring to fig. 8, an embodiment of the present application further provides an electronic device 500 including the camera module. The electronic device 500 may be a mobile terminal, a Personal Computer (PC), a tablet, a server, etc.
As shown in fig. 8, the electronic device 500 includes one or more processors, communication sections, and the like, for example: one or more Central Processing Units (CPUs) 501, and/or one or more image processors (GPUs) 513, etc., which may perform various appropriate actions and processes according to executable instructions stored in a Read Only Memory (ROM)502 or loaded from a storage section 508 into a Random Access Memory (RAM) 503. Communications portion 512 may include, but is not limited to, a network card, which may include, but is not limited to, an ib (infiniband) network card.
The processor may communicate with the read only memory 502 and/or the random access memory 630 to execute executable instructions, communicate with the communication section 512 through the bus 504, and communicate with other target devices through the communication section 512 to accomplish various operations. For example: detecting the inclination of the optical lens through a gyroscope of the camera module 2; the position of the optical lens suspended on the translational suspension system is adjusted by controlling the translational suspension system of the camera module 2 based on the detected inclination and the amount of positional compensation of the optical lens stored in the memory of the camera module 2. According to the technical scheme of this application, can realize correcting optical lens.
In addition, in the RAM 503, various programs and data necessary for the operation of the apparatus can also be stored. The CPU 501, ROM 502, and RAM 503 are connected to each other via a bus 504. The ROM 502 is an optional module in case of the RAM 503. The RAM 503 stores executable instructions or writes executable instructions into the ROM 502 at runtime, and the executable instructions cause the processor 501 to execute operations corresponding to the communication method described above. An input/output (I/O) interface 505 is also connected to bus 504. The communication unit 512 may be integrated, or may be provided with a plurality of sub-modules (e.g., a plurality of IB network cards) and connected to the bus link.
The following components are connected to the I/O interface 505: an input portion 506 including a keyboard, a mouse, and the like; an output portion 507 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage portion 508 including a hard disk and the like; and a communication section 509 including a network interface card such as a LAN card, a modem, or the like. The communication section 509 performs communication processing via a network such as the internet. A drive 510 is also connected to the I/O interface 505 as needed. A removable medium 511 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 510 as necessary, so that a computer program read out therefrom is mounted into the storage section 508 as necessary. The camera module 2 is also connected to the I/O interface.
It should be noted that the architecture shown in fig. 8 is only an optional implementation manner, and in a specific practical process, the number and types of the components in fig. 8 may be selected, deleted, added or replaced according to actual needs; in different functional component settings, separate settings or integrated settings may also be used, for example, the GPU and the CPU may be separately set or the GPU may be integrated on the CPU, the communication part may be separately set or integrated on the CPU or the GPU, and so on. These alternative embodiments are all within the scope of the present disclosure.
The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by this application is not limited to the embodiments with a specific combination of features described above, but also covers other embodiments with any combination of features described above or their equivalents without departing from the technical idea described. For example, the above features and (but not limited to) features having similar functions in this application are mutually replaced to form the technical solution.
Claims (13)
1. A method for detecting a position compensation amount of an optical lens suspended from a lens mount by a translational suspension system, the method comprising:
determining a first position of an optical lens of a camera module relative to an image sensor of the camera module based on a first reference image obtained by shooting a target through the camera module which is horizontally placed;
determining a second position of the optical lens relative to the image sensor based on a second reference image obtained by shooting a target through a vertically-placed camera module; and
determining a position compensation amount of the optical lens based on a deviation between the first position and the second position,
the first position is a position where an optical axis of the optical lens coincides with a geometric center of a photosensitive area of the image sensor, and the second position is a position where the optical axis of the optical lens deviates from the geometric center of the photosensitive area of the image sensor.
2. The inspection method of claim 1, wherein determining the first position of the optical lens of the camera module relative to the image sensor of the camera module comprises:
determining a usable region in the first reference image;
determining at least one circle with a uniform brightness distribution based on a portion of the first reference image in the usable area;
determining a position of a brightness center based on the at least one circle having a uniform brightness distribution;
a first position of the optical lens relative to the image sensor is determined based on the position of the brightness center.
3. The detection method according to claim 1, wherein determining the position compensation amount of the optical lens comprises:
and determining the opposite number of the deviation as the position compensation quantity.
4. The detection method according to claim 1, further comprising: before the camera module shoots, a distance-increasing lens is arranged between the camera module and a shot target.
5. The detection method according to claim 4, further comprising: before the camera module shoots, the distance between the camera module and the shot target is adjusted.
6. The inspection method according to claim 1, wherein the camera module is fixed to a rotating mechanism, and before photographing by the vertically placed camera module, the inspection method further comprises:
the horizontally placed camera shooting module is rotated into a vertically placed camera shooting module through the rotating mechanism.
7. A method of correcting an optical lens, the method comprising:
detecting the inclination of the optical lens;
adjusting the position of the optical lens based on the detected inclination and the amount of position compensation of the optical lens determined according to the detection method of any one of claims 1-6.
8. The correction method according to claim 7, wherein detecting the inclination of the optical lens comprises: and detecting the inclination of the optical lens through a gyroscope.
9. The corrective method of claim 7, wherein adjusting the position of the optical lens comprises: adjusting a position of the optical lens suspended on the translational suspension system by controlling the translational suspension system based on the position compensation amount.
10. The utility model provides a module of making a video recording, its characterized in that, the module of making a video recording includes:
a memory storing a position compensation amount determined according to the detection method of any one of claims 1 to 6;
a lens base;
an optical lens; and
a translational suspension system that suspends the optical lens on the lens mount and adjusts a position of the optical lens based on a position compensation amount of the optical lens.
11. The camera module of claim 10, wherein the translational suspension system adjusts the position of the optical lens based on an amount of position compensation of the optical lens and a tilt of the optical lens.
12. The camera module of claim 11, further comprising: an autofocus motor through which the optical lens is coupled to the translational suspension system;
the automatic focusing motor is used for driving the optical lens to move along the optical axis direction of the optical lens.
13. A method for manufacturing a camera module is characterized by comprising the following steps:
assembling a module to be detected;
detecting the module to be detected according to the detection method of any one of claims 1 to 6;
and storing the position compensation quantity to the module to be detected to obtain the camera module.
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| TWI780676B (en) * | 2021-04-23 | 2022-10-11 | 梭特科技股份有限公司 | Compensating method of varying-focus image deviation of an image capturing device |
| CN114125433A (en) * | 2021-11-23 | 2022-03-01 | 珠海广浩捷科技股份有限公司 | OIS (optical information system) testing machine for mobile phone |
| CN114222115A (en) * | 2021-12-16 | 2022-03-22 | 昆山丘钛微电子科技股份有限公司 | Optical anti-shake calibration method, device, equipment and medium |
| CN114745490B (en) * | 2022-02-24 | 2024-05-28 | Oppo广东移动通信有限公司 | Camera module, electronic device, optical anti-shake method, and storage medium |
| CN117395483B (en) * | 2023-12-07 | 2024-05-14 | 荣耀终端有限公司 | Assembling method and equipment for camera module |
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