WO2017088601A1 - 摄像头模组和移动终端 - Google Patents

摄像头模组和移动终端 Download PDF

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Publication number
WO2017088601A1
WO2017088601A1 PCT/CN2016/102050 CN2016102050W WO2017088601A1 WO 2017088601 A1 WO2017088601 A1 WO 2017088601A1 CN 2016102050 W CN2016102050 W CN 2016102050W WO 2017088601 A1 WO2017088601 A1 WO 2017088601A1
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WIPO (PCT)
Prior art keywords
polarizing plate
angle
transmission
camera module
polarizer
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PCT/CN2016/102050
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English (en)
French (fr)
Inventor
庞飞龙
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努比亚技术有限公司
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Application filed by 努比亚技术有限公司 filed Critical 努比亚技术有限公司
Publication of WO2017088601A1 publication Critical patent/WO2017088601A1/zh

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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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B11/00—Filters or other obturators specially adapted for photographic purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components

Definitions

  • the present invention relates to the field of lenses, and in particular, to a camera module and a mobile terminal.
  • a digital camera uses a dimming circle, an ND (Neutral Density) filter, or a combination of the two. Reducing the aperture reduces the amount of light entering, but it increases the depth of field, and the aperture of the current mobile phone camera module is fixed and not adjustable. Adding ND filters of different densities in front of the lens is not only cumbersome but also requires carrying a variety of density ND filters, which brings a lot of inconvenience to the shooting leisure.
  • the smooth surface is often too bright, resulting in missing details in the dark, and the contrast is reduced.
  • Embodiments of the present invention are directed to a camera module and a mobile terminal, which are directed to solving the problem of strong reflection of a smooth surface by a camera.
  • the embodiment of the present invention provides a camera module, including a lens group, and the camera module further includes:
  • Two polarizing plates coaxially disposed in front of the lens group, the polarizing plate only allowing a vibration component of the incident light parallel to its polarization direction to pass;
  • Two driving motors each of which drives a polarizing plate to rotate about an axis to adjust an angle of polarization of the two polarizing plates;
  • a controller configured to control a drive output of the drive motor.
  • the driving motor is disposed at a rear side of the lens group, and the driving motor
  • the rotating shaft is disposed in parallel with the axis of the lens group, and the front end of the rotating shaft is provided with a transmission device that cooperates with a side surface of the polarizing plate to drive the polarizing plate to rotate.
  • the transmission and the side of the polarizer are engaged by a spur gear.
  • the driving motor is disposed at a side of the polarizing plate, the rotating shaft of the driving motor is perpendicular to an axis of the lens group, and a front end of the rotating shaft is provided with a transmission device, the transmission device and the polarization The sides of the sheet cooperate to drive the polarizer to rotate.
  • the transmission device is mated with the side surface of the polarizing plate by a twill gear.
  • the gear on the transmission has a first angle with the rotating shaft
  • the gear on the polarizing plate has a second angle with the axis
  • the sum of the first angle and the second angle is 90°.
  • the first angle and the second angle are both 45 degrees.
  • the transmission and the side of the polarizer are frictionally driven.
  • the polarizing plate is made of a polarizing property crystal having an orientation effect.
  • the polarizing plate comprises an optical glass and a polymer coating coated on the optical glass;
  • the polymer coating is used to create a fence-like structure.
  • the embodiment of the present invention further provides a mobile terminal, including a lens group, where the mobile terminal further includes:
  • Two polarizing plates coaxially disposed in front of the lens group, the polarizing plate only allowing a vibration component of the incident light parallel to its polarization direction to pass;
  • Two driving motors each of which drives a polarizing plate to rotate about an axis to adjust an angle of polarization of the two polarizing plates;
  • a controller configured to control a drive output of the drive motor.
  • the driving motor is disposed at a rear side of the lens group, the rotating shaft of the driving motor is disposed in parallel with an axis of the lens group, and a front end of the rotating shaft is provided with a transmission device, and the transmission device is configured The sides of the polarizer cooperate to drive the polarizer to rotate.
  • the transmission and the side of the polarizer are engaged by a spur gear.
  • the driving motor is disposed at a side of the polarizing plate, the rotating shaft of the driving motor is perpendicular to an axis of the lens group, and a front end of the rotating shaft is provided with a transmission device, the transmission device and the polarization The sides of the sheet cooperate to drive the polarizer to rotate.
  • the transmission device is mated with the side surface of the polarizing plate by a twill gear.
  • the gear on the transmission has a first angle with the rotating shaft
  • the gear on the polarizing plate has a second angle with the axis
  • the sum of the first angle and the second angle is 90°.
  • the first angle and the second angle are both 45 degrees.
  • the transmission and the side of the polarizer are frictionally driven.
  • the polarizing plate is made of a polarizing property crystal having an orientation effect.
  • the polarizing plate comprises an optical glass and a polymer coating coated on the optical glass; wherein the polymer coating is used to create a fence-like structure.
  • the camera module and the mobile terminal provided by the embodiments of the present invention provide two rotatable polarizing plates in front of the lens group, and adjust the angle of the polarization direction by rotating the two polarizing plates to adjust the incident light intensity and filter the harmful polarization.
  • Light reduces the light transmission intensity of the strong reflective surface of the smooth surface, and enhances the detailed imaging effect of the scene in the dark.
  • FIG. 1A is an exploded perspective view of a first embodiment of a camera module according to an embodiment of the present invention
  • FIG. 1B is an exploded view of a first embodiment of a camera module according to a specific embodiment of the present invention
  • FIG. 1C is an overall structural diagram of a first embodiment of a camera module according to an embodiment of the present invention.
  • FIG. 1D is a first embodiment of a camera module according to an embodiment of the present invention. Top view
  • FIG. 2A is a schematic overall structural view of a second embodiment of a camera module according to an embodiment of the present invention.
  • Figure 2B is a schematic cross-sectional view taken along line A-A of Figure 2A;
  • FIG. 2C is a top view of the camera module of FIG. 2A;
  • Figure 2D is a partial enlarged view of B in Figure 2C;
  • 3A is a schematic view showing a propagation direction of natural light
  • 3B is a schematic diagram of a polarizing plate filtering light waves
  • 3C is a schematic diagram of adjusting the light transmission intensity of the polarizing plate in the present embodiment
  • FIG. 3D is a schematic view showing decomposition of incident light by a polarizing plate in the present embodiment.
  • FIG. 1A to FIG. 1D are respectively an exploded perspective view, an exploded view, an overall structural view and a top view of a first embodiment of a camera module provided in an embodiment of the present invention.
  • the front side described in this embodiment refers to the direction in which the light source is located
  • the plan view refers to the plan view shown in FIG. 1C, which corresponds to the direction in which the camera module 10 can be seen along the incident direction of the light. view.
  • the camera module 10, including the lens group further includes:
  • the polarizing plate 20 is coaxially disposed in front of the lens group, and the polarizing plate 20 is only allowed Passing a vibration component parallel to its polarization direction in the incident light;
  • a controller configured to control a drive output of the drive motor 22.
  • the polarizing plate 20 may be made of a micro-polarized crystal having orientation (such as mica); or a polyethylene film or a crystal of polyvinyl cyanide may be applied to the optical glass, and the polymer coating may be extremely fine.
  • the fence-like structure seems to be a fine fence, allowing only the same direction of vibration as the vibration.
  • the control of the incident light intensity is performed by the two polarizing plates 20.
  • the side portion of the polarizing plate 20 is mounted in the loop, and an endless belt is disposed outside the loop to be driven by force.
  • the driving motor 22 has a small volume, and only needs to drive the polarizing plate 20 to rotate, and since the two polarizing plates 20 each have a driving motor 22, the two driving motors 22 can respectively drive the two polarizing plates 20 to rotate in opposite directions.
  • the rapid adjustment of the angle of polarization of the polarizing plate 20 is achieved, and the rotating shaft 21 of the driving motor 22 is driven to rotate the polarizing plate 20 through the transmission device 211 at the front end.
  • the diameter ratio of the polarizing plate 20 to the actuator 211 can be adjusted to be relatively large, achieving more precise control of the rotational speed of the polarizing plate 20.
  • the controller is used to control the driving output of the driving motor 22, mainly for the magnitude of the rotation angle, and the controller is manually controlled by the user according to the imaging effect that needs to be realized.
  • the desired light intensity input is achieved, that is, by the controller stopping the rotation of the drive motor 22, the current angle of the polarization directions of the two polarizing plates 20 is retained, and a photograph is generated.
  • the driving motor 22 is disposed on the rear side of the lens group, and the rotating shaft 21 of the driving motor 22 is disposed in parallel with the axis of the lens group.
  • the front end of the rotating shaft 21 is provided with a transmission device 211, and the transmission device 211
  • the side surface of the polarizing plate 20 is fitted to drive the polarizing plate 20 to rotate.
  • the transmission device 211 and the side surface of the polarizing plate 20 are engaged by a spur gear.
  • the teeth on the transmission 211 are parallel to the rotating shaft 21, and the teeth on the polarizing plate 20 are parallel to the axis, and the engagement between the mutually parallel teeth enables the transmission between the mutually parallel rotating shafts. That is, the transmission of the transmission 211 to the polarizing plate 20.
  • the gear transmission control is precise, and the adjustment of the angle of polarization of the polarizing plate 20 can be achieved.
  • the side surfaces of the transmission device 211 and the polarizing plate 20 are frictionally driven, and the friction transmission has low requirements on the manufacturing precision of the transmission device 211 and the polarizing plate 20, which is advantageous for controlling the product cost.
  • FIG. 2A to FIG. 2D are respectively an overall structural diagram of a second embodiment of a camera module provided in a specific embodiment of the present invention, a cross-sectional view taken along line AA of FIG. 2A , and a camera module of FIG. 2A .
  • the driving motor 22 is disposed on the side of the polarizing plate 20, and the rotating shaft 21 of the driving motor 22 is perpendicularly directed to the axis of the lens group, and the rotating shaft 21 is The front end is provided with a transmission 211 that cooperates with the side of the polarizing plate 20 to drive the polarizing plate 20 to rotate.
  • the transmission 211 and the side of the polarizing plate 20 are fitted by a twill gear.
  • the teeth on the transmission device 211 are at an angle with the rotating shaft 21; the teeth on the polarizing plate 20 are also at an angle with the axis, and the sum of the two angles is 90°, which are perpendicular to each other.
  • the rotation shaft 21 of the drive motor 22 and the axis of the polarizing plate 20, the teeth having the above-described angular relationship can realize the transmission between the two rotation axes perpendicular to each other.
  • the gear transmission control is precise, and the adjustment of the angle of polarization of the polarizing plate 20 can be achieved. Optimally, both angles are 45°, and the same tooth structure can be set for the bite.
  • An angle between the gear on the transmission 211 and the rotating shaft 21 is a first angle; an angle between the gear and the axis on the polarizing plate 20 is a second angle.
  • the side surfaces of the transmission device 211 and the polarizing plate 20 are frictionally driven, and the friction transmission has low requirements on the manufacturing precision of the transmission device 211 and the polarizing plate 20, which is advantageous for controlling the product cost.
  • FIG. 3A to FIG. 3D are respectively a schematic diagram of the propagation direction of natural light and a schematic diagram of filtering light waves of the polarizing plate.
  • the schematic diagram of the polarizing plate adjusting the light transmission intensity in the present embodiment and the schematic diagram of the polarizing plate decomposing the incident light in the present embodiment.
  • the light wave belongs to the electromagnetic wave, and the vibration direction of the electromagnetic wave is perpendicular to the direction of its propagation, so it is called a transverse wave.
  • the natural light that is repeatedly diffused and reflected by the light source through the surface of the uneven object belongs to unpolarized light, and the natural light has the characteristics of axis symmetry, uniform distribution, and the same amplitude of vibration in all directions, as shown in FIG. 3A.
  • the polarizing plate 20 can pass the light having the same direction of the vibration of the light wave and the direction of the polarization thereof without any hindrance, and the light having a direction perpendicular to the polarization direction of the light wave can be filtered, and the light having a certain angle between the direction of the vibration of the light wave and the direction of the polarization can be
  • the light wave is decomposed into the same component as its polarization direction and a component perpendicular to its polarization direction, wherein the same component as its polarization direction can pass without hindrance, and a component perpendicular to its polarization direction is filtered out, as shown in FIG. 3B.
  • the polarizing plate 20 By the principle of the polarizing plate 20, after the natural light passes through the first polarizing plate 20, the light wave becomes linearly polarized light, and then passes through the second polarizing plate 20, and the angle between the polarization directions of the two polarizing plates 20 is adjusted. It acts to adjust the intensity of transmitted light, as shown in Figure 3C.
  • the reflection coefficient is:
  • the reflection coefficient is:
  • the reflectance of the s-wave component of the incident light and the reflectance of the p-wave component are generally not equal.
  • the reflectance of the s-wave component of the incident light and the reflectance of the p-wave component are generally not equal.
  • two rotatable polarizing plates are disposed in front of the lens group, and the angles of the polarization directions are adjusted by rotating the two polarizing plates, thereby adjusting the incident light intensity and filtering out the harmful polarized light;
  • the light transmission intensity of the strong reflective surface of the smooth surface is lowered, and the detailed imaging effect of the scene in the dark is improved.
  • the mobile terminal can be understood as a specific application of the foregoing camera module in the mobile terminal.
  • the mobile terminal includes a lens group, and further includes:
  • the polarizing plate 20 is coaxially disposed in front of the lens group, and the polarizing plate 20 only allows the vibration component of the incident light parallel to the polarization direction thereof to pass;
  • a controller configured to control a drive output of the drive motor 22.
  • the driving motor 22 is disposed on the rear side of the lens group, and the rotating shaft 21 of the driving motor 22 is disposed in parallel with the axis of the lens group.
  • the front end of the rotating shaft 21 is provided with a transmission device 211, and the transmission device 211 is matched with the side surface of the polarizing plate 20.
  • the polarizing plate 20 is driven to rotate.
  • the transmission 211 is mated with the side of the polarizing plate 20 by a spur gear.
  • the driving motor 22 is disposed on the side of the polarizing plate 20, the rotating shaft 21 of the driving motor 22 is perpendicularly directed to the axis of the lens group, and the front end of the rotating shaft 21 is provided with a transmission device 211, the side of the transmission device 211 and the polarizing plate 20 Cooperate to drive the polarizer 20 to rotate.
  • the transmission 211 is mated with the side of the polarizing plate 20 by a twill gear.
  • the mobile terminal can be implemented in various forms.
  • the mobile terminal described in the present invention may include, for example, a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Tablet), a PMP (Portable Multimedia Player), a navigation device, etc.
  • Mobile terminals such as fixed terminals such as digital TVs, desktop computers, and the like. In the following, it is assumed that the terminal is a mobile terminal.
  • PDA Personal Digital Assistant
  • PAD Tablett
  • PMP Portable Multimedia Player

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Polarising Elements (AREA)
  • Blocking Light For Cameras (AREA)

Abstract

本发明公开了一种摄像头模组和移动终端。该摄像头模组，包括镜头组，所述摄像头模组，还包括：两个偏振片，所述偏振片同轴设置于所述镜头组的前方，所述偏振片仅允许入射光中与其偏振方向平行的振动分量通过；两个驱动电机，两个所述驱动电机分别驱动一个偏振片绕轴线旋转以调节两个偏振片的偏振方向的夹角；控制器，配置为控制所述驱动电机的驱动输出。

Description

摄像头模组和移动终端 技术领域
本发明涉及镜头领域，尤其涉及一种摄像头模组和移动终端。
背景技术
在光照强度较强的环境下，如果需要以慢速快门拍摄出特殊效果的照片(如：虚化的水流等)，就必须减少镜头的进光量。通常数码相机会采用调光圈、加ND(Neutral Density，减光)滤镜或两者的组合方法实现。减小光圈可降低进光量，但却增加了景深，且目前的手机摄像头模组中光圈均是固定不可调的。而在镜头前添加不同密度的ND滤镜不仅繁琐而且需要携带多种密度的ND滤镜，给拍摄休闲带来了诸多不便。
在拍摄场景中具有光滑表面的物体时(如：玻璃、水面等)，常会出现光滑表面反光过强，导致暗处景物细节缺失，对比度下降等现象。
发明内容
本发明实施例期望提出一种摄像头模组和移动终端，旨在解决摄像头拍摄光滑表面强反光的问题。
本发明实施例提出一种摄像头模组，包括镜头组，所述摄像头模组，还包括：
两个偏振片，所述偏振片同轴设置于所述镜头组的前方，所述偏振片仅允许入射光中与其偏振方向平行的振动分量通过；
两个驱动电机，两个所述驱动电机分别驱动一个偏振片绕轴线旋转以调节两个偏振片的偏振方向的夹角；
控制器，配置为控制所述驱动电机的驱动输出。
基于上述方案，所述驱动电机设置于镜头组的后侧方，所述驱动电机 的转轴与所述镜头组的轴线平行设置，所述转轴的前端设置有传动装置，所述传动装置与所述偏振片的侧面配合以驱动所述偏振片旋转。
基于上述方案，所述传动装置与所述偏振片的侧面通过直纹齿轮配合。
基于上述方案，所述驱动电机设置于所述偏振片的侧面，所述驱动电机的转轴垂直朝向所述镜头组的轴线，所述转轴的前端设置有传动装置，所述传动装置与所述偏振片的侧面配合以驱动所述偏振片旋转。
基于上述方案，所述传动装置与所述偏振片的侧面通过斜纹齿轮配合。
基于上述方案，所述传动装置上的齿轮与所述转轴呈第一夹角；
所述偏振片上的齿轮与轴线呈第二夹角；
所述第一夹角和所述第二夹角之和为90°。
基于上述方案，所述第一夹角和所述第二夹角均为45°。
基于上述方案，所述传动装置与所述偏振片的侧面通过摩擦传动。
基于上述方案，所述偏振片由有定向作用的偏光性质晶体制成。
基于上述方案，所述偏振片包括光学玻璃及涂在所述光学玻璃上的聚合物涂层构成；
其中，所述聚合物涂层用于产生栅栏状的结构。
本发明实施例还提出一种移动终端，包括镜头组，所述移动终端，还包括：
两个偏振片，所述偏振片同轴设置于所述镜头组的前方，所述偏振片仅允许入射光中与其偏振方向平行的振动分量通过；
两个驱动电机，两个所述驱动电机分别驱动一个偏振片绕轴线旋转以调节两个偏振片的偏振方向的夹角；
控制器，配置为控制所述驱动电机的驱动输出。
基于上述方案，所述驱动电机设置于镜头组的后侧方，所述驱动电机的转轴与所述镜头组的轴线平行设置，所述转轴的前端设置有传动装置，所述传动装置与所述偏振片的侧面配合以驱动所述偏振片旋转。
基于上述方案，所述传动装置与所述偏振片的侧面通过直纹齿轮配合。
基于上述方案，所述驱动电机设置于所述偏振片的侧面，所述驱动电机的转轴垂直朝向所述镜头组的轴线，所述转轴的前端设置有传动装置，所述传动装置与所述偏振片的侧面配合以驱动所述偏振片旋转。
基于上述方案，所述传动装置与所述偏振片的侧面通过斜纹齿轮配合。
基于上述方案，所述传动装置上的齿轮与所述转轴呈第一夹角；
所述偏振片上的齿轮与轴线呈第二夹角；
所述第一夹角和所述第二夹角之和为90°。
基于上述方案，所述第一夹角和所述第二夹角均为45°。
基于上述方案，所述传动装置与所述偏振片的侧面通过摩擦传动。
基于上述方案，所述偏振片由有定向作用的偏光性质晶体制成。
基于上述方案，所述偏振片包括光学玻璃及涂在所述光学玻璃上的聚合物涂层构成；其中，所述聚合物涂层用于产生栅栏状的结构。
本发明实施例提供的摄像头模组和移动终端，在镜头组前方设置两个可旋转的偏振片，通过旋转两个偏振片调整其偏振方向的夹角，从而调节入射光强度，滤除有害偏振光；降低了光滑表面强反光的透光强度，提升了暗处景物细节成像效果。
附图说明
图1A为本发明具体实施方案中提供的一种摄像头模组的第一实施例的爆炸透视图；
图1B为本发明具体实施方案中提供的一种摄像头模组的第一实施例的爆炸图；
图1C为本发明具体实施方式中提供的一种摄像头模组的第一实施例的整体结构图；
图1D为本发明具体实施方式中提供的一种摄像头模组的第一实施例的 俯视图；
图2A为本发明具体实施方案中提供的一种摄像头模组的第二实施例的整体结构图；
图2B为图2A中A-A向的截面示意图；
图2C为图2A中摄像头模组的俯视图；
图2D为图2C中B处的局部放大图；
图3A为自然光的传播方向示意图；
图3B为偏振片过滤光波的原理图；
图3C为本方案中偏振片调节透光强度的原理图；
图3D为本方案中偏振片对入射光分解的示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
以下结合附图对本发明的优选实施例进行详细说明，应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
现在将参考附图描述实现本发明各个实施例的移动终端。在后续的描述中，使用用于表示元件的诸如“模块”、“部件”或“单元”的后缀仅为了有利于本发明的说明，其本身并没有特定的意义。因此，"模块"与"部件"可以混合地使用。
请参考图1A至1D，其分别是本发明具体实施方式中提供的摄像头模组第一实施例的爆炸透视图、爆炸图、整体结构图和俯视图。在本实施例中所描述的前方是指光源所在的方向，俯视指在图1C所示的作图视角下的俯视，对应于摄像头模组10而言为顺着光线入射方向所能看到的视图。如图所示，该摄像头模组10，包括镜头组，还包括：
两个偏振片20，偏振片20同轴设置于镜头组的前方，偏振片20仅允 许入射光中与其偏振方向平行的振动分量通过；
两个驱动电机22，两个驱动电机22分别驱动一个偏振片20绕轴线旋转以调节两个偏振片20的偏振方向的夹角；
控制器，配置为控制驱动电机22的驱动输出。
偏振片20可以由有定向作用的微小偏光性质晶体(如云母)制成；或者在光学玻璃上涂聚乙烯膜或聚乙烯氰一类的结晶物，这一聚合物涂层可产生极细的栅栏状的结构，好像是一道细密的栅栏，只允许振动方向与缝隙相同的光通过。在本方案中通过两个偏振片20进行入射光强度的控制。
偏振片20的侧面部分安装于环圈中，在环圈以外的地方设置一环形带以与受力实现驱动。
驱动电机22的体积很小，仅仅需要驱动偏振片20转动即可，并且因为两个偏振片20各有一个驱动电机22，两个驱动电机22可以分别驱动两个偏振片20做反向转动，实现偏振片20的偏振方向的夹角的快速调整，驱动电机22的转轴21通过前端的传动装置211实现带动偏振片20旋转。如果有必要的话可以将偏振片20与传动装置211的直径比调整得比较大，实现偏振片20的旋转速度的更精确控制。
控制器用于控制驱动电机22的驱动输出，主要为旋转角度的大小，控制器由用户根据需要实现的成像效果手动控制。当实现想要的光强度输入，即通过控制器停止驱动电机22的转动，保留两个偏振片20的偏振方向的当前夹角，生成照片。
在本实施例中，如图所示，驱动电机22设置于镜头组的后侧方，驱动电机22的转轴21与镜头组的轴线平行设置，转轴21的前端设置有传动装置211，传动装置211与偏振片20的侧面配合以驱动偏振片20旋转。
其中，传动装置211与偏振片20的侧面通过直纹齿轮配合。
传动装置211上的轮齿与转轴21平行，偏振片20上的轮齿与轴线平行，相互平行的轮齿之间的咬合能够实现相互平行的旋转轴之间的传动， 即传动装置211到偏振片20的传动。齿轮传动控制精确，能够实现良好的偏振片20的偏振方向夹角的调节。
或者，传动装置211和偏振片20的侧面通过摩擦传动，摩擦传动对传动装置211与偏振片20的制作精度要求低，有利于控制产品成本。
请参考图2A至图2D，其分别是本发明具体实施方案中提供的一种摄像头模组的第二实施例的整体结构图、图2A中A-A向的截面示意图、图2A中摄像头模组的俯视图和图2C中B处的局部放大图，在本实施例中，如图所示，驱动电机22设置于偏振片20的侧面，驱动电机22的转轴21垂直朝向镜头组的轴线，转轴21的前端设置有传动装置211，传动装置211与偏振片20的侧面配合以驱动偏振片20旋转。
传动装置211与偏振片20的侧面通过斜纹齿轮配合。
在本实施例中，传动装置211上的轮齿与转轴21呈一定夹角；偏振片20上的轮齿也与轴线呈一定夹角，两个夹角之和为90°，对于相互垂直的驱动电机22的转轴21与偏振片20的轴线而言，存在上述角度关系的轮齿能够实现相互垂直的两个旋转轴之间的传动。齿轮传动控制精确，能够实现良好的偏振片20的偏振方向夹角的调节。最优的，两个夹角均为45°，可以设置完全相同的齿形结构进行咬合。
所述传动装置211上的齿轮与所述转轴21之间的夹角为第一夹角；所述偏振片20上的齿轮与轴线之间的夹角为第二夹角。
或者，传动装置211和偏振片20的侧面通过摩擦传动，摩擦传动对传动装置211与偏振片20的制作精度要求低，有利于控制产品成本。
对于前述两个实施例，虽然采用了不同的产品结构，但是其实现设计目标的基本光学原理相同，请参考图3A至图3D，其分别为自然光的传播方向示意图、偏振片过滤光波的原理图、本方案中偏振片调节透光强度的原理图和本方案中偏振片对入射光分解的示意图。
光波属于电磁波，电磁波的振动方向与其传播方向垂直，故称为横波。 由光源发出经过凹凸不平的物体表面多次漫反射的自然光属于非偏振光，自然光具有轴对称性、均匀分布、各方向振动的振幅相同的特点，如图3A所示。
偏振片20对于光波振动方向与其偏振方向相同的光可无阻碍地通过，对于光波振动方向与其偏振方向垂直的光可起滤除作用，对于光波振动方向与其偏振方向成一定夹角的光，可将光波分解为与其偏振方向相同的分量以及与其偏振方向垂直的分量，其中与其偏振方向相同的分量可无阻碍通过，与其偏振方向垂直的分量被滤除，如图3B所示。
利用偏振片20的原理，自然光经过第一个偏振片20后，光波变成线偏振光，然后再使其经过第二个偏振片20，通过调节两个偏振片20偏振方向的夹角，可起到调节透射光强度的作用，如图3C所示。
无论入射光波的振幅在垂直于传播方向的平面内取何方向，总是可以将其振幅分解为垂直于入射面(入射面：入射光线与法线决定的平面)的s波分量以及平行于入射面的p波分量，如图3D所示。
对于s波分量其反射系数为：
Figure PCTCN2016102050-appb-000001
对于p波分量其反射系数为：
Figure PCTCN2016102050-appb-000002
由s波分量及p波分量的反射系数可知，通常情况下入射光的s波分量的反射率与p波分量的反射率是不等的。对于均匀分布、各方向振幅相同的自然光，其经入射至光滑表面，经光滑表面反射后，即变成具有一定偏振性的部分偏振光。
综上所述，在镜头组前方设置两个可旋转的偏振片，通过旋转两个偏振片调整其偏振方向的夹角，从而调节入射光强度，滤除有害偏振光；降 低了光滑表面强反光的透光强度，提升了暗处景物细节成像效果。
以下是本发明具体实施方式中提供的一种移动终端的实施例，该移动终端可以理解为前述摄像头模组在移动终端的具体应用。具体而言，该移动终端包括镜头组，还包括：
两个偏振片20，偏振片20同轴设置于镜头组的前方，偏振片20仅允许入射光中与其偏振方向平行的振动分量通过；
两个驱动电机22，两个驱动电机22分别驱动一个偏振片20绕轴线旋转以调节两个偏振片20的偏振方向的夹角；
控制器，配置为控制驱动电机22的驱动输出。
可选地，驱动电机22设置于镜头组的后侧方，驱动电机22的转轴21与镜头组的轴线平行设置，转轴21的前端设置有传动装置211，传动装置211与偏振片20的侧面配合以驱动偏振片20旋转。
可选地，传动装置211与偏振片20的侧面通过直纹齿轮配合。
另一种可选地，驱动电机22设置于偏振片20的侧面，驱动电机22的转轴21垂直朝向镜头组的轴线，转轴21的前端设置有传动装置211，传动装置211与偏振片20的侧面配合以驱动偏振片20旋转。
可选地，传动装置211与偏振片20的侧面通过斜纹齿轮配合。
在实际实现过程中，移动终端可以以各种形式来实施。例如，本发明中描述的移动终端可以包括诸如移动电话、智能电话、笔记本电脑、数字广播接收器、PDA(个人数字助理)、PAD(平板电脑)、PMP(便携式多媒体播放器)、导航装置等等的移动终端以及诸如数字TV、台式计算机等等的固定终端。下面，假设终端是移动终端。然而，本领域技术人员将理解的是，除了特别用于移动目的的元件之外，根据本发明的实施方式的构造也能够应用于固定类型的终端。需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列 出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡按照本发明原理所作的修改，都应当理解为落入本发明的保护范围。

Claims (20)

  1. 一种摄像头模组，包括镜头组，所述摄像头模组，还包括：
    两个偏振片，所述偏振片同轴设置于所述镜头组的前方，所述偏振片仅允许入射光中与其偏振方向平行的振动分量通过；
    两个驱动电机，两个所述驱动电机分别驱动一个偏振片绕轴线旋转以调节两个偏振片的偏振方向的夹角；
    控制器，配置为控制所述驱动电机的驱动输出。
  2. 根据权利要求1所述的摄像头模组，其中，所述驱动电机设置于镜头组的后侧方，所述驱动电机的转轴与所述镜头组的轴线平行设置，所述转轴的前端设置有传动装置，所述传动装置与所述偏振片的侧面配合以驱动所述偏振片旋转。
  3. 根据权利要求2所述的摄像头模组，其中，所述传动装置与所述偏振片的侧面通过直纹齿轮配合。
  4. 根据权利要求1所述的摄像头模组，其中，所述驱动电机设置于所述偏振片的侧面，所述驱动电机的转轴垂直朝向所述镜头组的轴线，所述转轴的前端设置有传动装置，所述传动装置与所述偏振片的侧面配合以驱动所述偏振片旋转。
  5. 根据权利要求4所述的摄像头模组，其中，所述传动装置与所述偏振片的侧面通过斜纹齿轮配合。
  6. 根据权利要求5所述的摄像头模组，其中，
    所述传动装置上的齿轮与所述转轴呈第一夹角；
    所述偏振片上的齿轮与轴线呈第二夹角；
    所述第一夹角和所述第二夹角之和为90°。
  7. 根据权利要求6所述的摄像头模组，其中，
    所述第一夹角和所述第二夹角均为45°。
  8. 根据权利要求1所述的摄像头模组，其中，
    所述传动装置与所述偏振片的侧面通过摩擦传动。
  9. 根据权利要求1所述的摄像头模组，其中，
    所述偏振片由有定向作用的偏光性质晶体制成。
  10. 根据权利要求1所述的摄像头模组，其中，
    所述偏振片包括光学玻璃及涂在所述光学玻璃上的聚合物涂层构成；
    其中，所述聚合物涂层用于产生栅栏状的结构。
  11. 一种移动终端，包括镜头组，所述移动终端，还包括：
    两个偏振片，所述偏振片同轴设置于所述镜头组的前方，所述偏振片仅允许入射光中与其偏振方向平行的振动分量通过；
    两个驱动电机，两个所述驱动电机分别驱动一个偏振片绕轴线旋转以调节两个偏振片的偏振方向的夹角；
    控制器，配置为控制所述驱动电机的驱动输出。
  12. 根据权利要求11所述的移动终端，其中，所述驱动电机设置于镜头组的后侧方，所述驱动电机的转轴与所述镜头组的轴线平行设置，所述转轴的前端设置有传动装置，所述传动装置与所述偏振片的侧面配合以驱动所述偏振片旋转。
  13. 根据权利要求12所述的移动终端，其中，所述传动装置与所述偏振片的侧面通过直纹齿轮配合。
  14. 根据权利要求11所述的移动终端，其中，所述驱动电机设置于所述偏振片的侧面，所述驱动电机的转轴垂直朝向所述镜头组的轴线，所述转轴的前端设置有传动装置，所述传动装置与所述偏振片的侧面配合以驱动所述偏振片旋转。
  15. 根据权利要求14所述的移动终端，其中，所述传动装置与所述偏振片的侧面通过斜纹齿轮配合。
  16. 根据权利要求15所述的移动终端，其中，
    所述传动装置上的齿轮与所述转轴呈第一夹角；
    所述偏振片上的齿轮与轴线呈第二夹角；
    所述第一夹角和所述第二夹角之和为90°。
  17. 根据权利要求16所述的移动终端，其中，
    所述第一夹角和所述第二夹角均为45°。
  18. 根据权利要求11所述的移动终端，其中，
    所述传动装置与所述偏振片的侧面通过摩擦传动。
  19. 根据权利要求11所述的移动终端，其中，
    所述偏振片由有定向作用的偏光性质晶体制成。
  20. 根据权利要求11所述的移动终端，其中，
    所述偏振片包括光学玻璃及涂在所述光学玻璃上的聚合物涂层构成；
    其中，所述聚合物涂层用于产生栅栏状的结构。
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