WO2017202065A1 - 摄像装置以及利用其拍摄图像的方法 - Google Patents

摄像装置以及利用其拍摄图像的方法 Download PDF

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Publication number
WO2017202065A1
WO2017202065A1 PCT/CN2017/073660 CN2017073660W WO2017202065A1 WO 2017202065 A1 WO2017202065 A1 WO 2017202065A1 CN 2017073660 W CN2017073660 W CN 2017073660W WO 2017202065 A1 WO2017202065 A1 WO 2017202065A1
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WIPO (PCT)
Prior art keywords
liquid crystal
sub
crystal lens
pickup apparatus
transparent electrode
Prior art date
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PCT/CN2017/073660
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English (en)
French (fr)
Inventor
王慧娟
董学
王丹
邱云
孙晓
杨照坤
王瑞勇
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BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
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BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
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Priority to US15/542,374 priority Critical patent/US10594919B2/en
Publication of WO2017202065A1 publication Critical patent/WO2017202065A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H04N23/676—Bracketing for image capture at varying focusing conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/95—Computational photography systems, e.g. light-field imaging systems
    • H04N23/957—Light-field or plenoptic cameras or camera modules
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/95—Computational photography systems, e.g. light-field imaging systems
    • H04N23/958—Computational photography systems, e.g. light-field imaging systems for extended depth of field imaging
    • H04N23/959—Computational photography systems, e.g. light-field imaging systems for extended depth of field imaging by adjusting depth of field during image capture, e.g. maximising or setting range based on scene characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/61—Noise processing, e.g. detecting, correcting, reducing or removing noise the noise originating only from the lens unit, e.g. flare, shading, vignetting or "cos4"

Definitions

  • the present disclosure relates to the field of imaging technology, and in particular to an imaging apparatus and a method of capturing an image therewith.
  • the current stage is generally solved by taking a photo field camera to take pictures.
  • multiple photos of the same scene, different focus can be manually taken, and then synthesized into a panoramic deep photo using image processing software.
  • the imaging portion of the light field camera generally consists of a microlens array and an image sensor array.
  • Such lens arrays typically consist of thousands of miniature lenses.
  • the miniature lens array of the light field camera is arranged by conventional microlenses.
  • conventional lenses cannot achieve a fast and flexible zoom function. Therefore, the technical solution of obtaining images with different focuses by the light field camera needs to be realized by means of complicated physical and mathematical knowledge.
  • the method of synthesizing the panoramic deep photograph by combining the image processing software by manual photographing is complicated, and the photographing technique of the photographer is required to be high. Specifically, the photographer may need to manually control the uniformity of exposure to ensure the best Aperture, even with a tripod to ensure the stability of the camera.
  • Embodiments of the present disclosure provide an image pickup apparatus and a method of capturing an image using the same.
  • Such a photographing device has the advantages of simple structure, fast shooting speed, convenient operation, and the like, and can be used for panoramic deep image shooting.
  • an image pickup apparatus includes: a liquid crystal lens array composed of a plurality of sub liquid crystal lenses, an image sensor, and a driving module. Specifically, there is a preset distance between the liquid crystal lens array and the image sensor, and the driving module is electrically connected to the liquid crystal lens array. Further specifically, the driving module is configured to adjust a focal length of each of the sub liquid crystal lenses according to a distance between the object to be photographed and the corresponding sub liquid crystal lens during photographing, so that the light rays from the respective objects are respectively focused after passing through the corresponding sub liquid crystal lens In the plane where the image sensor is located.
  • the liquid crystal lens array includes: a first substrate and a second substrate which are oppositely disposed.
  • each of the sub liquid crystal lenses includes: a first transparent electrode disposed on a side of the first substrate facing the second substrate, a second transparent electrode disposed on a side of the second substrate facing the first substrate, and located at a liquid crystal layer between the first transparent electrode and the second transparent electrode.
  • the first transparent electrode is a planar electrode
  • the second transparent electrode includes a plurality of sub-electrodes arranged side by side.
  • the second transparent electrode is a planar electrode
  • the first transparent electrode includes a plurality of sub-electrodes arranged side by side.
  • the sub-electrode includes a linear sub-electrode or a dot-shaped sub-electrode.
  • the first transparent electrode and the second transparent electrode are both indium tin oxide semiconductor transparent electrodes.
  • each sub liquid crystal lens has the same occupied area in the liquid crystal lens array.
  • the image sensor includes an image sensor array composed of a plurality of sub sensors, and each of the sub liquid crystal lenses corresponds to at least one sub sensor.
  • the foregoing camera device provided by the embodiment of the present disclosure also included is an aberration correcting optical system disposed on an optical path from the liquid crystal lens array to the image sensor.
  • the aberration correction optical system includes a Fresnel lens group.
  • the photographing method includes: during shooting, the driving module adjusts a focal length of each sub liquid crystal lens according to a distance between the object to be photographed and the corresponding sub liquid crystal lens, so that the light from each object passes through the corresponding sub liquid crystal lens. , respectively, focus on the plane where the image sensor is located.
  • FIG. 1 is a block diagram showing the structure of an image pickup apparatus according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural view of a liquid crystal lens array in an image pickup apparatus according to an embodiment of the present disclosure
  • FIG. 3 illustrates a schematic diagram of a positional relationship of a sub liquid crystal lens and an image sensor array in an image pickup apparatus according to an embodiment of the present disclosure
  • FIG. 4 shows a schematic structural view of an image pickup apparatus according to another embodiment of the present disclosure.
  • an image pickup apparatus may include a liquid crystal lens array 11, a image sensor 12, and a drive module 13 composed of a plurality of sub liquid crystal lenses 111.
  • a liquid crystal lens array 11 there may be a preset distance between the liquid crystal lens array 11 and the image sensor 12.
  • the drive module 13 and the liquid crystal lens array 11 can be electrically connected.
  • the driving module 13 may be configured to adjust the focal length of each sub liquid crystal lens 111 according to the distance between the object to be photographed and the corresponding sub liquid crystal lens 111 when acquiring an image. In this manner, light rays from the respective objects can be focused in the plane in which the image sensor 12 is located after passing through the corresponding sub-liquid crystal lens 111.
  • the liquid crystal lens array 11 and the plane in which the image sensor 12 is placed can generally be arranged in parallel so that the imaging optical path of the liquid crystal lens can be simplified.
  • the liquid crystal lens array 11 and the image sensor 12 may be placed as needed.
  • the plane is set to have a preset angle.
  • the driving module can adjust the focal length of each sub liquid crystal lens based on the distance between the object to be photographed and each sub liquid crystal lens array, thereby causing different portions of the liquid crystal lens array to have different focal lengths. In this way, objects to be photographed at different distances can be clearly focused on the image sensor, thereby obtaining a panoramic deep image.
  • the image pickup device has the advantages of simple structure, fast response speed, no post-processing, and simple operation.
  • the liquid crystal lens array 11 may include a first substrate 112 and a second substrate 113 which are oppositely disposed. Further, each of the sub-liquid crystal lenses 111 may further include: a first transparent electrode 114 disposed on a side of the first substrate 112 facing the second substrate 113, and a first transparent electrode 114 disposed on a side of the second substrate 113 facing the first substrate 112 The second transparent electrode 115 and the liquid crystal layer 116 between the first transparent electrode 114 and the second transparent electrode 115.
  • the first substrate 112 and the second substrate 113 of the liquid crystal lens array 11 can be made of a light-transmitting material.
  • the first substrate 112 and the second substrate 113 may be a glass substrate.
  • the first substrate 112 and the second substrate 113 may be formed by using other light-transmitting materials, which are not limited herein.
  • the liquid crystal lens array 11 may be composed of the sub liquid crystal lens 111.
  • each of the sub liquid crystal lenses 111 may include a first transparent electrode 114, a second transparent electrode 115, and a liquid crystal layer 116 between the first transparent electrode 114 and the second transparent electrode 115.
  • a driving signal is applied to the first transparent electrode 114 and the second transparent electrode 115 of each sub liquid crystal lens 111 through the driving module to cause liquid crystal molecules located between the first transparent electrode 114 and the second transparent electrode 115 to occur. deflection. In this manner, the curvature of each of the sub liquid crystal lenses 111 will vary to have different focal lengths.
  • the above-described image pickup apparatus is capable of performing clear imaging of an object at a plurality of positions at the same time, thereby obtaining a panoramic deep image.
  • the first transparent electrode 114 may be selected as a planar electrode, and the second transparent electrode 115 may include a plurality of sub-electrodes arranged side by side.
  • the second transparent electrode 115 may be selected as a planar electrode, and the first transparent electrode 114 may include a plurality of sub-electrodes arranged side by side.
  • the plurality of sub-electrodes correspond to one sub-liquid crystal lens.
  • the sub-electrode may include a linear sub-electrode.
  • the sub-electrodes may also include point electrodes.
  • the dot-like sub-electrodes may also be dot-shaped sub-electrodes having a regular shape, such as dots, square-dot electrodes, and the like.
  • a dot-shaped sub-electrode can also be selected as an irregularly shaped dot-shaped sub-electrode, which is not limited herein.
  • the sub-electrodes may be disposed as a sub-electrode of a circular array, an annular array, or a rectangular array according to actual needs, which is not specifically limited in this embodiment.
  • the first transparent electrode 114 and the second transparent electrode 115 are both indium tin oxide semiconductor transparent electrodes.
  • the first transparent electrode 114 and the second transparent electrode 115 may be formed by using other transparent electrode materials to increase the transmittance of the liquid crystal lens array 11 , which is not limited herein.
  • the area occupied by each of the sub liquid crystal lenses 111 is uniform.
  • a driving signal is applied to the sub-electrodes corresponding to the respective sub liquid crystal lenses 111.
  • the area occupied by each of the sub liquid crystal lenses 111 may also be different, which is not limited in this embodiment.
  • the image sensor 12 may specifically be an image sensor array composed of a plurality of sub-sensors 121.
  • each of the sub liquid crystal lenses 111 may also correspond to at least one sub sensor 121.
  • each of the sub liquid crystal lenses 111 may be associated with m ⁇ n sub sensors 121.
  • the values of m and n may affect the imaging accuracy. Specifically, the larger the value of m and n is, the higher the imaging accuracy is.
  • the number of sub-sensors 121 can be changed as needed, which is not limited herein.
  • a device such as COMS can also be used as the sub-sensor 121 to form an image sensor array.
  • the above-described image pickup apparatus may further include an aberration correcting optical system 14 disposed on an optical path from the liquid crystal lens array 11 to the image sensor 12.
  • an aberration correcting optical system By using such an aberration correcting optical system, aberration can be reduced, And improve the imaging quality of the camera.
  • the aberration correcting optical system 14 may include a Fresnel lens group.
  • Other aberration correcting devices or lenses may be selected to achieve the same effect as needed, which is not specifically limited in this embodiment.
  • an embodiment of the present disclosure also provides a method of capturing an image using any of the aforementioned image pickup devices. Since the principle of solving the technical problem by this method is similar to that of the aforementioned imaging device, the implementation will not be described again.
  • a method of capturing an image by using any one of the above imaging devices may include: during shooting, the driving module adjusts a focal length of each sub liquid crystal lens according to a distance between an object to be photographed and a corresponding sub liquid crystal lens. So that the light from each object is focused in the plane of the image sensor after passing through the corresponding sub-liquid crystal lens.
  • the drive module can adjust the focal length of each sub liquid crystal lens based on the distance between each object and the corresponding sub liquid crystal lens, so that the foreground to the back view of the photograph can be The image is clearly imaged in the plane of the image sensor. Thereby, a panoramic deep photo can be obtained.
  • the image sensor may further record two-dimensional information of an object located at different positions captured by the lens.
  • the driving signal is determined according to the distance between the object and the sub liquid crystal lens to adjust the focal length of each of the sub liquid crystal lenses in the liquid crystal lens array. Therefore, the distance between each object to be shot and the lens, that is, the depth of field information, can be derived according to each driving signal of the driving module when the image is acquired. In such a case, in combination with the two-dimensional information of each object to be photographed, a three-dimensional image can be obtained on the three-dimensional display.
  • An embodiment of the present disclosure provides an image pickup apparatus including: a liquid crystal lens array composed of a plurality of sub liquid crystal lenses, an image sensor, and a driving module. Specifically, there is a preset distance between the liquid crystal lens array and the image sensor, and the driving module is electrically connected to the liquid crystal lens array.
  • the driving module adjusts the focal length of each sub liquid crystal lens according to the distance between the object to be photographed and the corresponding sub liquid crystal lens, so that the light rays from the respective objects pass through the corresponding sub- After the liquid crystal lens, Focus on the plane where the image sensor is located.
  • the focal lengths of the respective sub liquid crystal lenses are adjusted by using the driving module such that different portions of the liquid crystal lens array have different focal lengths. Based on this, it is possible to clearly focus on the image to be photographed at different distances on the image sensor, thereby obtaining a panoramic deep image.
  • the image pickup device according to the embodiment of the present disclosure has the advantages of simple structure, fast response speed, no post-processing, and simple operation.

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Abstract

一种摄像装置以及利用其拍摄图像的方法。摄像装置包括：由多个子液晶透镜组成的液晶透镜阵列、图像传感器以及驱动模块。液晶透镜阵列与图像传感器之间存在预设距离，并且驱动模块与液晶透镜阵列电连接。驱动模块配置成在拍摄期间，根据待拍摄物体与对应子液晶透镜之间的距离，调整各个子液晶透镜的焦距，使得来自各个物体的光线在通过对应子液晶透镜之后，分别聚焦在图像传感器所在的平面中。在这样的情况下，驱动模块能够将各个子液晶透镜调节成具有不同的焦距，使得位于不同距离的待拍摄物体能够清晰地聚焦，从而获得全景深图像。相比于现有的全景深拍摄装置，该摄像装置具有结构简单、响应速度快、无需后期处理、操作便捷等优点。

Description

摄像装置以及利用其拍摄图像的方法
优先权声明
本申请要求2016年5月25日提交的中国专利申请201610353752.5的优先权，该中国专利申请以其整体通过引用并入本文。
技术领域
本公开涉及成像技术领域，并且特别地涉及一种摄像装置以及利用其拍摄图像的方法。
背景技术
现代人们越来越喜爱用拍照的形式记录生活。摄影无论作为职业还是作为一种兴趣越来越受到重视。人们在使用相机拍照时常常会遇到两类问题。一方面，在拍照时为了突出特征点或营造出特殊效果，人们通常会使目标物体清晰聚焦而让周围背景虚化。另一方面，在拍摄风景、花卉、建筑等题材时，人们往往希望表现出整个画面中的所有画素，即得到全景深照片。这要求镜头里的每一点都得到精准对焦。然而，对于普通相机而言，一旦拍照结束，焦点在后期照片处理时将无法更改，这限制了我们后期处理照片的灵活度。
针对以上两类问题，现阶段一般通过采用光场相机进行拍照来解决。或者，可以手动地拍摄多张同场景、不同焦点的照片，并且然后利用图像处理软件合成为一张全景深照片。
然而，光场相机的成像部分一般由微型镜头阵列和图像感应器阵列构成。这样的镜头阵列通常由数千个微型镜头组成。利用这样的光场相机，可以记录入射光束的光场，之后采用软件借助复杂的物理和数学计算对图像进行解码，从而处理成最终的画面。光场相机的微型镜头阵列由传统的微透镜排列而成。然而，传统透镜无法实现快速灵活的变焦功能。因此，通过光场相机获得焦点不同的图像这一技术方案需要借助复杂的物理和数学知识而实现。这些复杂技术不利于光场相机的市场普及。对应地，对于通过手动拍摄结合图像处理软件而合成全景深照片的方法，其过程比较复杂，并且对拍摄者的摄影技术要求较高。具体地，拍摄者可能需要手动控制曝光度的统一，确保最佳 光圈，甚至借助三脚架等来保证相机的稳定。
发明内容
本公开的实施例提供了一种摄像装置以及利用其拍摄图像的方法。这样的拍摄装置具有结构简单、拍摄速度快、操作便捷等优点，并且可以用于全景深图像的拍摄。
根据本公开的第一方面，提供了一种摄像装置。该拍摄装置包括：由多个子液晶透镜组成的液晶透镜阵列、图像传感器以及驱动模块。具体地，液晶透镜阵列与图像传感器之间存在预设距离，并且驱动模块与液晶透镜阵列电连接。进一步具体地，驱动模块配置成在拍摄期间，根据待拍摄物体与对应子液晶透镜之间的距离，调整各个子液晶透镜的焦距，使得来自各个物体的光线在通过对应子液晶透镜之后，分别聚焦在图像传感器所在的平面中。
根据一种可能的实现方式，在本公开的实施例提供的上述摄像装置中，液晶透镜阵列包括：相对设置的第一基板和第二基板。具体地，每一个子液晶透镜包括：设置于第一基板面向第二基板的一侧上的第一透明电极、设置于第二基板面向第一基板的一侧上的第二透明电极、以及位于第一透明电极与第二透明电极之间的液晶层。
根据一种可能的实现方式，在本公开的实施例提供的上述摄像装置中，第一透明电极为面状电极，并且第二透明电极包括并排设置的多个子电极。可替换地，第二透明电极为面状电极，并且第一透明电极包括并排设置的多个子电极。
根据一种可能的实现方式，在本公开的实施例提供的上述摄像装置中，子电极包括直线状子电极或点状子电极。
根据一种可能的实现方式，在本公开的实施例提供的上述摄像装置中，第一透明电极和第二透明电极均为铟锡氧化物半导体透明电极。
根据一种可能的实现方式，在本公开的实施例提供的上述摄像装置中，在液晶透镜阵列内，每一个子液晶透镜的占用面积相同。
根据一种可能的实现方式，在本公开的实施例提供的上述摄像装置中，图像传感器包括由多个子传感器组成的图像传感器阵列，并且每一个子液晶透镜与至少一个子传感器相对应。
根据一种可能的实现方式，本公开的实施例提供的上述摄像装置 还包括：设置于从液晶透镜阵列到图像传感器的光路上的像差矫正光学系统。
根据一种可能的实现方式，在本公开的实施例提供的上述摄像装置中，像差矫正光学系统包括菲涅尔乐透镜组。
根据本公开的第二方面，提供了一种利用上述任一摄像装置拍摄图像的方法。具体地，这样的拍摄方法包括：在拍摄期间，驱动模块根据待拍摄物体与对应子液晶透镜之间的距离，调整各个子液晶透镜的焦距，使得来自各个物体的光线在通过对应子液晶透镜之后，分别聚焦在图像传感器所在的平面中。
附图说明
图1示出了根据本公开的实施例的摄像装置的结构示意图；
图2示出了根据本公开的实施例的摄像装置中的液晶透镜阵列的结构示意图；
图3示出了根据本公开的实施例的摄像装置中的子液晶透镜与图像传感器阵列的位置关系示意图；以及
图4示出了根据本公开的另一个实施例的摄像装置的结构示意图。
具体实施方式
针对目前存在的全景深摄像装置中结构与拍摄过程复杂的问题，本公开的实施例提供了一种摄像装置。如图1所示，根据本公开的实施例的摄像装置可以包括：由多个子液晶透镜111组成的液晶透镜阵列11、图像传感器12以及驱动模块13。具体地，在液晶透镜阵列11与图像传感器12之间可以存在预设距离。而且，驱动模块13与液晶透镜阵列11可以电连接。进一步地，驱动模块13可以配置成在获取图像时，根据待拍摄物体与对应子液晶透镜111之间的距离，调整各个子液晶透镜111的焦距。以这样的方式，来自各个物体的光线在通过对应子液晶透镜111之后，能够分别在图像传感器12所处的平面中聚焦。
在具体实施例中，通常可以将液晶透镜阵列11与图像传感器12所处的平面设置成平行的，从而可以简化液晶透镜的成像光路。可替换地，根据需要，也可以将液晶透镜阵列11与图像传感器12所处的 平面设置成具有预设夹角。当然，本公开并不仅限于此。根据这样的具体实施例，驱动模块可以基于待拍摄物体与各个子液晶透镜阵列之间的距离来调整各个子液晶透镜的焦距，从而使液晶透镜阵列的不同部分具有不同的焦距。以这样的方式，位于不同距离处的待拍摄物体都能够在图像传感器上清晰地聚焦，从而获得全景深图像。相比于现有的全景深拍摄装置，根据本公开的实施例的摄像装置具有结构简单、响应速度快、无需后期处理、操作简捷等优点。
根据具体实施例，在本公开的实施例提供的上述摄像装置中，如图2所示，液晶透镜阵列11可以包括：相对设置的第一基板112和第二基板113。进一步地，每一个子液晶透镜111还可以包括：设置于第一基板112面向第二基板113的一侧上的第一透明电极114、设置于第二基板113面向第一基板112的一侧上的第二透明电极115、以及位于第一透明电极114与第二透明电极115之间的液晶层116。由于液晶透镜阵列11需要对来自待拍摄物体的反射光线进行聚集，因此，液晶透镜阵列11的第一基板112和第二基板113可以选用透光材料来制作。例如，第一基板112和第二基板113可以为玻璃基板。在实际应用中，也可以选用其它透光材料来制作第一基板112和第二基板113，在此不做限定。作为进一步的可选示例，液晶透镜阵列11可以由子液晶透镜111组成。在这样的情况下，各个子液晶透镜111可以包括第一透明电极114、第二透明电极115以及位于第一透明电极114与第二透明电极115之间的液晶层116。在实际应用中，通过驱动模块向各个子液晶透镜111的第一透明电极114和第二透明电极115施加驱动信号，以使位于第一透明电极114与第二透明电极115之间的液晶分子发生偏转。以这样的方式，各个子液晶透镜111的曲率将发生变化，从而具有不同的焦距。由此可见，根据本公开的实施例的上述摄像装置能够同时对多个位置处的物体进行清晰成像，从而获得全景深图像。
根据具体实施例，在本公开的实施例提供的上述摄像装置中，第一透明电极114可以选择为面状电极，并且第二透明电极115可以包括并排设置的多个子电极。或者，作为可替换方案，第二透明电极115可以选择为面状电极，并且第一透明电极114可以包括并排设置的多个子电极。在具体实施例中，多个子电极与一个子液晶透镜对应。由此，当驱动模块向第一透明电极114或第二透明电极115的多个子电 极施加驱动信号时，与之对应的子液晶透镜的曲率将发生变化，从而实现聚焦效果的调整。
进一步地，在本公开的实施例提供的上述摄像装置中，子电极可以包括直线状子电极。可替换地，子电极也可以包括点状电极。在具体实施例中，点状子电极还可以是具有规则形状的点状子电极，例如圆点、方点子电极等。当然，这样的点状子电极也可以选择为不规则形状的点状子电极，在此不作限定。此外，根据实际需要，还可以将子电极设置为圆形阵列、环形阵列、矩形阵列的子电极，本实施例不对其进行具体限定。
根据具体实施例，在本公开的实施例提供的上述摄像装置中，第一透明电极114和第二透明电极115均为铟锡氧化物半导体透明电极。在实际应用中，还可以选用其它透明电极材料来制作第一透明电极114和第二透明电极115，以增大液晶透镜阵列11的透光率，在此不做限定。
根据具体实施例，在本公开的实施例提供的上述摄像装置中，在液晶透镜阵列11内，各个子液晶透镜111所占的面积一致。通过使各个子液晶透镜111在液晶透镜阵列11内的占用面积相同，促进了对各个子液晶透镜111对应的子电极施加驱动信号。当然，在具体实施例中，各个子液晶透镜111所占的面积也可以各不相同，本实施例不对其进行限定。
根据具体实施例，在本公开的实施例提供的上述摄像装置中，如图3所示，图像传感器12具体地可以为由多个子传感器121组成的图像传感器阵列。进一步地，每一个子液晶透镜111也可以与至少一个子传感器121相对应。在具体实施例中，可以使每一个子液晶透镜111与m×n个子传感器121相对应。进一步优选地，为了提高成像效果，可以取m＝n。通常情况下，m与n的取值可能影响成像精度。具体地，m和n的取值越大，成像精度就越高，在实际应用中，可以根据需要改变子传感器121的个数，在此不做限定。另外，在实际应用中，还可以使用COMS等器件作为子传感器121来形成图像传感器阵列。
进一步地，如图4所示，根据本公开的实施例的上述摄像装置还可以包括设置于从液晶透镜阵列11到图像传感器12的光路上的像差矫正光学系统14。通过使用这样的像差矫正光学系统，可以减小像差， 并且提高摄像装置的成像质量。
根据具体实施例，在本公开的实施例提供的上述摄装置中，像差矫正光学系统14可以包括菲涅尔透镜组。根据需要，还可以选用其它的像差矫正装置或透镜来达到相同效果，本实施例不对其进行具体限定。
基于同一发明构思，本公开的实施例还提供了一种利用前述任一摄像装置拍摄图像的方法。由于通过该方法解决技术问题的原理与前述摄像装置相似，因此实现方式不再赘述。
具体地，根据本公开的实施例，利用上述任一摄像装置拍摄图像的方法可以包括：在拍摄期间，驱动模块根据待拍摄物体与对应子液晶透镜之间的距离，调整各个子液晶透镜的焦距，使得来自各个物体的光线在通过对应子液晶透镜之后，分别聚焦在图像传感器所在的平面中。
根据本公开的实施例提供的上述摄像装置的拍摄方法，驱动模块能够基于各个物体与对应子液晶透镜之间的距离来调整各个子液晶透镜的焦距，从而使拍摄的前景到后景都可以在图像传感器所在平面中清晰地成像。由此，可以获得全景深照片。
此外，在本公开的实施例提供的上述摄像装置中，还可以使液晶透镜阵列固定聚集在任意焦点处，由此可以虚化焦点后方的背景，并且突出需要呈现的待拍摄物体。根据具体实施例，本公开的实施例提供的上述摄像装置中，图像传感器还可以记录镜头捕获到的位于不同位置处的物体的二维信息。而且，根据物体与子液晶透镜之间的距离来确定驱动信号，以调整液晶透镜阵列中各个子液晶透镜的焦距。因此，可以根据获取图像时驱动模块的各个驱动信号来推得各个待拍摄物体与镜头之间的距离，即景深信息。在这样的情况下，再结合各个待拍摄物体的二维信息，可以在三维显示器上获得三维图像。
本公开的实施例提供了一种摄像装置，其包括：由多个子液晶透镜组成的液晶透镜阵列、图像传感器以及驱动模块。具体地，液晶透镜阵列与图像传感器之间存在预设距离，并且驱动模块与液晶透镜阵列电连接。在本公开的实施例提供的摄像装置中，在拍摄期间，驱动模块根据待拍摄物体与对应子液晶透镜之间的距离，调整各个子液晶透镜的焦距，使得来自各个物体的光线在通过对应子液晶透镜之后， 分别聚焦在图像传感器所在的平面中。以这样的方式，通过利用驱动模块调整各个子液晶透镜的焦距，使得液晶透镜阵列的不同部分具有不同的焦距。基于此，能够在图像传感器上清晰地聚焦位于不同距离处的待拍摄物体，由此获得全景深图像。相比于现有的全景深拍摄装置，根据本公开的实施例的摄像装置具有结构简单、响应速度快、无需后期处理、操作简捷等优点。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开的权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (11)

  1. 一种摄像装置，包括：由多个子液晶透镜组成的液晶透镜阵列、图像传感器以及驱动模块；其中，
    所述液晶透镜阵列与所述图像传感器之间存在预设距离；
    所述驱动模块与所述液晶透镜阵列电连接；并且
    所述驱动模块配置成在拍摄期间，根据待拍摄物体与对应子液晶透镜之间的距离，调整各个子液晶透镜的焦距，使得来自各个物体的光线在通过对应子液晶透镜之后，分别聚焦在所述图像传感器所位于的平面中。
  2. 如权利要求1所述的摄像装置，其中，
    所述液晶透镜阵列包括：相对设置的第一基板和第二基板；并且
    每一个所述子液晶透镜包括：设置于所述第一基板面向所述第二基板的一侧上的第一透明电极、设置于所述第二基板面向所述第一基板的一侧上的第二透明电极、以及位于所述第一透明电极与所述第二透明电极之间的液晶层。
  3. 如权利要求2所述的摄像装置，其中，
    所述第一透明电极包括面状电极；并且
    所述第二透明电极包括并排设置的多个子电极。
  4. 如权利要求2所述的摄像装置，其中，
    所述第二透明电极包括面状电极；并且
    所述第一透明电极包括并排设置的多个子电极。
  5. 如权利要求3或4所述的摄像装置，其中，所述子电极包括直线状子电极或点状子电极。
  6. 如权利要求2-4中任一项所述的摄像装置，其中，所述第一透明电极和所述第二透明电极均为铟锡氧化物半导体透明电极。
  7. 如权利要求1-4中任一项所述的摄像装置，其中，每一个所述子液晶透镜在所述液晶透镜阵列内的占用面积相同。
  8. 如权利要求1-4中任一项所述的摄像装置，其中，
    所述图像传感器包括由多个子传感器组成的图像传感器阵列；并且
    每一个所述子液晶透镜与至少一个所述子传感器对应。
  9. 如权利要求1-4中任一项所述的摄像装置，还包括：设置在从所述液晶透镜阵列到所述图像传感器的光路上的像差矫正光学系统。
  10. 如权利要求9所述的摄像装置，其中，所述像差矫正光学系统包括菲涅尔透镜组。
  11. 一种利用如权利要求1至10中任一项所述的摄像装置拍摄图像的方法，包括：
    在拍摄期间，驱动模块根据待拍摄物体与对应子液晶透镜之间的距离，调整各个子液晶透镜的焦距，使得来自各个物体的光线在通过对应子液晶透镜之后，分别聚焦在所述图像传感器所位于的平面中。
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JP2021516784A (ja) * 2018-03-12 2021-07-08 エムビーディーエー・ユーケー・リミテッド 撮像デバイス
JP2022116165A (ja) * 2018-03-12 2022-08-09 エムビーディーエー・ユーケー・リミテッド 撮像デバイス
JP7337826B2 (ja) 2018-03-12 2023-09-04 エムビーディーエー・ユーケー・リミテッド 撮像デバイス
US11860505B2 (en) 2018-03-12 2024-01-02 Mbda Uk Limited Imaging device

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