CN210491002U

CN210491002U - Imaging device

Info

Publication number: CN210491002U
Application number: CN201921433275.9U
Authority: CN
Inventors: 杨鑫
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-08
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses an imaging device, this imaging device includes: the optical phase control device comprises an optical receiving device for receiving light, an optical phase control device for realizing light deflection, an image sensor for imaging by utilizing the light and a driving chip for driving the optical phase control device; the optical receiving device, the optical phase control device and the image sensor are fixed in parallel from the object side to the image side in sequence; the incident surface of the optical phase control device faces the light-emitting surface of the optical receiving device; the optical phase control device is connected with the driving chip; the absorption surface of the image sensor faces the light exit surface of the optical phase control device.

Description

Imaging device

Technical Field

The embodiment of the utility model provides an relate to optics anti-shake technical field, especially relate to an imaging device.

Background

Optical anti-shake refers to the situation that in a camera or other similar imaging devices, the shake phenomenon of the imaging device occurring in the process of capturing an optical signal is avoided or reduced through the arrangement of optical components, such as a lens, so as to improve the imaging quality.

At present, the main method for realizing optical anti-shake of the imaging device is to control the compensation lens group to move during shaking so as to counteract the picture shaking generated by shaking and enable light rays to accurately enter the sensor to realize imaging. Specifically, the micro movement can be detected by a gyroscope in the lens of the imaging device, then the movement signal is transmitted to the processor, the processor can calculate the displacement required to be compensated, and the compensation is performed according to the shaking direction and the displacement through the compensation lens group.

However, in order to package the compensation lens group which can be flexibly moved, the size of the imaging device is increased, and the compensation lens group is moved to perform optical anti-shake, so that the response speed and the precision are low, and the anti-shake effect is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an imaging device, through small, the response is fast, the optics that the precision is high phase control device controls light and deflects at the imaging in-process, has not only reduced imaging device's volume, has improved imaging device's reliability, has still improved anti-shake effect.

The embodiment of the utility model provides a technical scheme is so realized:

an embodiment of the utility model provides an imaging device, imaging device includes: the optical phase control device comprises an optical receiving device for receiving light, an optical phase control device for realizing light deflection, an image sensor for imaging by utilizing the light and a driving chip for driving the optical phase control device;

the optical receiving device, the optical phase control device and the image sensor are fixed in parallel from the object side to the image side in sequence;

the incident surface of the optical phase control device faces the light-emitting surface of the optical receiving device;

the optical phase control device is connected with the driving chip;

the absorption surface of the image sensor faces the light exit surface of the optical phase control device.

In the above imaging apparatus, the optical phased device is one or more optical phased arrays.

In the above imaging apparatus, the optical phased device is a first type optical phased array,

the first type of optical phased array comprises a plurality of phased array elements and a plurality of electrodes corresponding to the plurality of phased array elements;

the plurality of phased array elements are spliced together to form a phased array;

the phased array elements are connected with the electrodes in a one-to-one correspondence manner;

the driving chip is respectively connected with each electrode of the plurality of electrodes.

In the above imaging apparatus, the incident surface of the phased array faces the light exit surface of the optical receiving device;

the light exit surface of the phased array faces the absorption surface of the image sensor.

In the imaging device, the incident surface of the phased array and the light exit surface of the phased array are two surfaces facing each other.

In the above imaging apparatus, the optical phased device is a second type optical phased array including a first cover layer, a second cover layer, a liquid crystal layer, and a control electrode;

the first covering layer, the liquid crystal layer and the second covering layer are sequentially arranged in parallel;

the control electrode is respectively connected with the first covering layer, the second covering layer and the driving chip.

In the above-described image forming apparatus, the liquid crystal layer includes a plurality of liquid crystal crystals arranged in an array form, wherein each of the plurality of liquid crystal crystals is parallel to the first cover layer and the second cover layer.

In the above-described image forming apparatus, the first cover layer faces the light exit surface of the optical receiving device;

the second cover layer faces an absorption surface of the image sensor.

In the above-described image forming apparatus, the first cover layer and the second cover layer include a transparent electrode and a glass substrate, respectively.

In the above-described image forming apparatus, the optical receiving device includes: the lens group is used for realizing light refraction, and the optical filter is used for realizing light filtration;

the lens group, the optical filter and the optical phase control device are fixed in parallel from the object side to the image side in sequence;

the incident surface of the optical filter faces the light-emitting surface of the lens group;

and the incident surface of the optical phase control device faces the light emergent surface of the optical filter.

In the imaging device, the lens group comprises a plurality of lenses which are sequentially fixed in parallel according to a preset sequence;

each of the plurality of lenses is parallel to the optical filter, the optical phase control device, and the image sensor.

An embodiment of the utility model provides an imaging device, include: the optical phase control device comprises an optical receiving device for receiving light, an optical phase control device for realizing light deflection, an image sensor for imaging by utilizing the light and a driving chip for driving the optical phase control device; the optical receiving device, the optical phase control device and the image sensor are fixed in parallel from the object side to the image side in sequence; the light emitting surface of the optical receiving device faces the incident surface of the optical phase control device; the optical phase control device is connected with the driving chip; the absorption surface of the image sensor faces the light exit surface of the optical phase control device. The embodiment of the utility model provides an imaging device through small, the response is fast, the optics that the precision is high is controlled the device and is deflected at formation of image in-process control light, has not only reduced imaging device's volume, has still improved the anti-shake effect.

Drawings

Fig. 1 is a schematic structural diagram of an image forming apparatus according to an embodiment of the present invention;

fig. 2 is a schematic front view of an exemplary first type of phased array provided by an embodiment of the present invention;

fig. 3(a) is a schematic diagram of an exemplary phase difference between phased array elements according to an embodiment of the present invention;

fig. 3(b) is a schematic diagram of an exemplary light deflection provided by an embodiment of the present invention;

fig. 4(a) is a schematic structural diagram of an exemplary second type optical phased array provided in an embodiment of the present invention;

fig. 4(b) is a schematic diagram illustrating an exemplary rotation of a liquid crystal according to an embodiment of the present invention;

fig. 5(a) is a schematic diagram of an exemplary jitter-free imaging method provided by an embodiment of the present invention;

fig. 5(b) is a schematic diagram of an exemplary dither imaging provided by an embodiment of the present invention;

fig. 5(c) is a schematic diagram of an exemplary dither imaging provided by an embodiment of the present invention;

fig. 6 is a schematic flowchart of an imaging method according to an embodiment of the present invention.

Detailed Description

In order to illustrate the technical solutions of the present invention or the prior art more clearly, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be noted that, for convenience of description, only the relevant portions of the related inventions are shown in the drawings.

The embodiment of the utility model provides an imaging device. Fig. 1 is a schematic structural diagram of an image forming apparatus according to an embodiment of the present invention. As shown in fig. 1, the image forming apparatus includes: an optical receiving device 11 for receiving light, an optical phase control device 12 for realizing light deflection, an image sensor 13 for imaging with light, and a driving chip 14 for driving the optical phase control device.

Specifically, in the embodiment of the present invention, the optical receiving device 11, the optical phase control device 12, and the image sensor 13 are fixed in parallel in order from the object side to the image side;

the incident surface of the optical phase control device 12 faces the light exit surface of the optical receiving device 11;

the optical phase control device 12 is connected with the driving chip 14;

the absorption surface of the image sensor 13 faces the light exit surface of the optical phase control device 12.

Specifically, in the embodiment of the present invention, the optical receiving device 11 includes: a lens group 111 for realizing light refraction, and a filter 112 for realizing light filtration;

the lens group 111, the optical filter 112 and the optical phase control device 12 are fixed in parallel from the object side to the image side in sequence;

the incident surface of the filter 112 faces the light-emitting surface of the lens group 111;

the incident surface of the optical phase control device 12 faces the light exit surface of the filter 112.

It should be noted that, in the embodiment of the present invention, the lens group 111 actually includes not only the light emitting surface but also the incident surface. The incident surface of the lens group 111 faces a scene to be imaged, and is opposite to the light exit surface, so that during imaging, the incident light is received and refracted, and the refracted light is emitted from the light exit surface of the lens group 111.

It should be noted that, in the embodiment of the present invention, the lens group 111 includes a plurality of lenses fixed in parallel in sequence according to a preset sequence; each of the plurality of mirrors is parallel to the optical filter 112, the optical phase control device 12, and the image sensor 13. In addition, the type and the number of the plurality of lenses included in the lens group 111 may be selected according to actual requirements, as shown in fig. 1, the lens group 111 may include four lenses, and the types of the lenses may be various, which is not limited by the embodiment of the present invention.

It should be noted that, in the embodiment of the present invention, the optical filter 112 is specifically configured to pass visible light in incident light, and the incident surface of the optical filter 112 and the light emitting surface of the optical filter 112 are two opposite surfaces. The incident surface of the optical phase control device 12 and the light emitting surface of the optical phase control device 12 are two opposing surfaces.

It should be noted that, in the embodiment of the present invention, as shown in fig. 1, in the imaging apparatus, the optical receiving device 11, the optical phased device 12 and the image sensor 13 are sequentially fixed in parallel from the object side to the image side, during the imaging process, the incident surface of the lens group 111 of the optical receiving device 11 will receive the incident light and refract the incident light, and emit the refracted light from the light emitting surface of the lens group 111, and then the refracted light will be incident on the incident surface of the optical filter 112, and the optical filter 112 filters the refracted light, so as to emit the visible light after filtering the refracted light from the light emitting surface of the optical filter 112, further, the visible light will be incident on the incident surface of the optical phased device 12, the optical phased device 12 deflects the visible light under the driving of the driving device, and emits the deflected light from the light emitting surface of the optical phased device 12, and finally, the absorption surface of the image sensor 13 absorbs the deflected light to perform imaging.

It will be appreciated that a certain degree of jitter will inevitably occur during imaging by the imaging device, resulting in angular deviations when light is ultimately incident on the image sensor 13. The embodiment of the utility model provides an in, imaging device includes that optics is controlled device 12 and driver chip 14 mutually, and optics is controlled device 12 mutually and is connected with driver chip 14, and at the imaging process, driver chip 14 will drive optics phase control device 12 to control device 12 mutually through optics and will deflect the light, change the propagation direction of light, thereby compensate the light angular deviation that arouses because imaging device shakes.

It should be noted that, in the embodiment of the present invention, the optical phase control device 12 can be equivalent to a huge light receiver array, and each light receiver can independently add a fixed time delay (phase shift) to the received light, so that the light can be selectively emitted from different directions.

Specifically, in the embodiment of the present invention, the optical phased device 12 is one or more optical phased arrays.

It should be noted that, in the embodiment of the present invention, the optical phased array may be a one-dimensional optical phased array, and may also be a two-dimensional optical phased array, and in addition, the optical phased arrays of different types have differences in components, but actually all realize light deflection by changing the phase through the electrodes. Specific optical phased array's dimension, type and quantity the utility model discloses the embodiment does not limit.

It should be noted that, in the embodiment of the present invention, the optical phase control device 12 may implement the deflection of the light incident from the incident surface in one dimension or multiple dimensions. And in order to realize the deflection of multidimension degree, can cascade through two one-dimensional optics phased array or the two-dimensional deflection that a two-dimensional optics phased array realized light, the embodiment of the utility model provides a do not do the restriction.

Specifically, in the embodiment of the present invention, the optical phased device 12 may be a first type optical phased array. The first type optical phased array comprises a plurality of phased array elements and a plurality of electrodes corresponding to the phased array elements; a plurality of phased array elements are spliced together to form a phased array; the plurality of phased array elements are connected with the plurality of electrodes in a one-to-one correspondence manner; and a driving chip 14 connected to each of the plurality of electrodes.

Specifically, in the embodiment of the present invention, the incident surface of the phased array faces the light emitting surface of the optical filter 112; the light exit surface of the phased array faces the absorption surface of the image sensor 13. The incident surface of the phased array and the emergent surface of the phased array are two opposite surfaces. The entrance surface of the phased array is actually the entrance surface of the optical phased device 12, and the exit surface of the phased array is actually the exit surface of the optical phased device 12.

Fig. 2 is a schematic front view of an exemplary first type phased array according to an embodiment of the present invention. As shown in fig. 2, each small region represents a phased array element, and a plurality of phased array elements are spliced together in an array form to form a circular array surface. For each phased array element, one electrode is connected correspondingly, and each electrode is connected with the driving chip 14 respectively.

It should be noted that, in the embodiment of the present invention, the first type optical phased array may include a plurality of phased array elements, each phased array element corresponds to connect an electrode, and the number of specific phased array elements and the number of electrodes may be preset according to actual needs, the embodiment of the present invention is not limited.

Exemplarily, in the embodiment of the present invention, the first type optical phased array includes N phased array elements, correspondingly, N phased array elements correspond to connect N electrodes, the driving chip 14 drives N electrodes, N electrodes will control the phase difference between adjacent phased array elements in N phased array elements to be phi, wherein, the central point distance of adjacent phased array elements is d, the angle that the light deflected is theta, as shown in fig. 3(a), it is equivalent to the blazed grating of the notch cuttype, thereby the deflection of the angle is carried out to the incident light, as shown in fig. 3 (b).

It can be understood that, in the embodiment of the present invention, the principle that the first type optical phased array realizes the light deflection is derived from the microwave phased array, that is, the step-type blazed grating with a controllable wedge angle can be simulated by controlling the phase relationship between the lights emitted by the adjacent phased array elements, so that the incident lights generate constructive interference in the specific direction of the far field.

It should be noted that, in the embodiment of the present invention, the first type optical phased array described above belongs to a one-dimensional optical phased array, and the one-dimensional deflection of the light is realized, and of course, the optical phased device 12 may also be formed by cascading two first type optical phased arrays, so as to realize the two-dimensional deflection of the light. In addition, the optical phased device 12 may also be a two-dimensional optical phased array based on the same structure as the first type optical phased array light deflection principle, which is not limited by the embodiment of the present invention.

Specifically, in the embodiment of the present invention, the optical phased device 12 is an optical phased array of the second type. The second type optical phased array comprises a first covering layer, a second covering layer, a liquid crystal layer and a control electrode; the first covering layer, the liquid crystal layer and the second covering layer are sequentially arranged in parallel; the control electrodes are connected to the first cover layer, the second cover layer, and the driving chip 14, respectively.

Specifically, in an embodiment of the present invention, the liquid crystal layer includes a plurality of liquid crystal crystals arranged in an array, wherein each of the plurality of liquid crystal crystals is parallel to the first cover layer and the second cover layer.

Fig. 4(a) is a schematic structural diagram of an exemplary second type optical phased array according to an embodiment of the present invention. As shown in fig. 4(a), the first cover layer, the liquid crystal layer, and the second cover layer are sequentially arranged in parallel, and the first cover layer and the second cover layer are connected to the control electrode. The liquid crystal layer includes 30 liquid crystal crystals arranged in parallel in an array form.

It should be noted that, in the embodiment of the present invention, the first covering layer faces the light emitting surface of the optical receiving device 11; the second cover layer faces the absorption side of the image sensor 13.

Fig. 4(b) is a schematic diagram illustrating an exemplary rotation of a liquid crystal according to an embodiment of the present invention. As shown in fig. 4(b), under the driving of the driving chip 14, the voltage of the control electrode is continuously increased, so as to generate an electric field between the first covering layer and the second covering layer, and under the action of the electric field, the liquid crystal included in the liquid crystal layer will rotate at a certain angle.

Specifically, in an embodiment of the present invention, the first cover layer and the second cover layer include a transparent electrode and a glass substrate, respectively. The specific first cover layer and the second cover layer are not limited in the embodiments of the present invention.

It is understood that in the embodiment of the present invention, the second type optical phased array changes the refractive index of the liquid crystal through the control electrode to realize the light deflection. The incident light can be accurately deflected in real time by controlling the intensity of the electric field.

It should be noted that, in the embodiment of the present invention, the second type optical phased array described above belongs to a one-dimensional optical phased array, and the one-dimensional deflection of the light is realized, and of course, the optical phased device 12 may also be formed by cascading two second type optical phased arrays, so as to realize the two-dimensional deflection of the light. Furthermore, the optical phased device 12 may also be a two-dimensional optical phased array based on the same structure as the second type optical phased array light deflection principle, which is not limited by the embodiment of the present invention.

Fig. 5(a) is an exemplary jitter-free imaging schematic diagram according to an embodiment of the present invention. As shown in fig. 5(a), in the case of no shake, the incident light on the right side reaches the point P of the image sensor 13, and is absorbed by the image sensor. Fig. 5(b) is a schematic diagram of an exemplary dither imaging provided by an embodiment of the present invention. As shown in fig. 5(b), in the case of the imaging device in the shake, if the light deflection is not performed, the right light reaches the Q point of the image sensor 13, that is, the light is not correctly projected to the P point, and thus the imaging blur will be caused. Fig. 5(c) is a schematic diagram of an exemplary dither imaging provided by an embodiment of the present invention. As shown in fig. 5(c), in the case of shaking, the imaging apparatus drives the optical phase control device 12 with the driving chip 14 to deflect the light so that the right light reaches the point P of the image sensor 13.

It should be noted that in the embodiment of the present invention, optical phase control device 12 has advantages such as low driving voltage, small quality, response are fast, the precision is high and small, use it in imaging device, can reduce the imaging device size, compare in traditional optical anti-shake scheme through removing lens or mobile sensor, not only improve the anti-shake effect, thereby obtain the better image of quality, moreover, optical phase control device 12 does not need the physics to remove in imaging device, can also improve imaging device's reliability.

The embodiment of the utility model provides a still provide an imaging method, be applied to among the above-mentioned imaging device. Fig. 6 is a schematic flowchart of an imaging method according to an embodiment of the present invention. As shown in fig. 6, the method mainly comprises the following steps:

s601, acquiring visible light rays through an optical receiving device.

In an embodiment of the present invention, as shown in fig. 1, an image forming apparatus includes: an optical receiving device 11 for receiving light, an optical phase control device 12 for effecting light deflection, an image sensor 13 for imaging with light, and a drive chip 14 for driving the optical phase control device. When the imaging device is used for imaging, visible light rays can be acquired through the optical receiving device 11.

It should be noted that, in the embodiment of the present invention, when the incident light irradiates into the imaging device, the incident surface of the lens group 111 in the optical receiving device 11 at the front end of the imaging device will receive the incident light, so as to refract the incident light, and emit the refracted light from the light emitting surface of the lens group 111. Then, the optical filter 112 in the optical receiving device 11 filters the refracted light, that is, only the visible light.

It should be noted that, in the embodiment of the present invention, the lens group 111 may be composed of a plurality of lenses, and each lens may be a lens with different refractive indexes, so as to be arranged according to a specific manner, and the embodiment of the present invention is not limited.

It is understood that, in the embodiment of the present invention, in the imaging device, the incident surface of the optical filter 112 of the optical receiving device 11 faces the light emitting surface of the lens group 111, so as to directly receive the refracted light and only pass the visible light in the refracted light.

And S602, driving the optical phase control device to deflect the visible light through the driving chip to obtain deflected light.

The embodiment of the utility model provides an in, imaging device can be through driver chip 14 after obtaining visible light through optics receiving element 11, and drive optics phase control device 12 deflects visible light, obtains the light that deflects.

Illustratively, in the embodiment of the present invention, the optical phased device 12 is a first type optical phased array, the first type optical phased array includes a plurality of phased array elements, and a plurality of electrodes corresponding to the plurality of phased array elements, the imaging device passes through the driving chip 14, the driving optical phased device 12 deflects the visible light, and the deflected light is obtained, including: driving the plurality of electrodes by the driving chip 14; the visible light is deflected through the plurality of phased array elements which are connected with the plurality of electrodes in a one-to-one correspondence mode, and deflected light is obtained.

Illustratively, in the embodiment of the present invention, the optical phased device 12 is a second type optical phased array, the second type optical phased array includes a first covering layer, a liquid crystal layer, a second covering layer arranged in parallel in sequence, and a control electrode respectively connected to the first covering layer, the second covering layer and the driving chip 14, the imaging device passes through the driving chip 14, the driving optical phased device 12 deflects the visible light, and the deflected light is obtained, including: driving the control electrode by the driving chip 14 to form an electric field between the first and second cover layers connected to the electrode; the visible light is deflected under the action of an electric field through a plurality of liquid crystal crystals included in the liquid crystal layer, and the deflected light is obtained.

It should be noted that, in the embodiment of the present invention, the optical phase control device 12 can be equivalent to a huge light receiver array, and each light receiver can independently add a fixed time delay (phase shift) to the received light, so that the light can be selectively emitted from different directions. The optical phased device 12 is one or more optical phased arrays. Imaging device passes through the optics phase control device 12 of different grade type and all can realize deflecting of light under driver chip 14's drive, and specific light mode of deflecting the embodiment of the utility model provides a do not do the injecing.

And S603, absorbing the deflected light rays through the image sensor to form an image.

The embodiment of the utility model provides an in, imaging device through optics phase control device 12 to the visible light deflect, after obtaining the light that deflects, can be through image sensor 13, absorb the light that deflects and form images.

Note that, in the embodiment of the present invention, the absorption surface of the image sensor 13 faces the light exit surface of the optical phase control device 12. Therefore, the image sensor 13 can receive the deflected light emitted from the optical phase control device 12, and absorb the deflected light for imaging.

It should be noted that, in the embodiment of the present invention, the image sensor 13 can absorb the deflection light, so as to perform photoelectric conversion on the deflection light, obtain a corresponding electrical signal, and generate an image by using the electrical signal. The specific image sensor 13 absorbs light to perform imaging is the prior art, and is not described in detail herein.

The embodiment of the utility model provides an imaging method, include: acquiring visible light rays through an optical receiving device; driving an optical phase control device to deflect the visible light through a driving chip to obtain deflected light; and absorbing the deflected light rays by the image sensor to form images. The embodiment of the utility model provides an imaging method through small, the response is fast, the high optics of precision phase control device is at formation of image in-process control light deflection, has not only reduced imaging device's volume, has still improved the anti-shake effect.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An image forming apparatus, characterized in that the image forming apparatus comprises: the optical phase control device comprises an optical receiving device for receiving light, an optical phase control device for realizing light deflection, an image sensor for imaging by utilizing the light and a driving chip for driving the optical phase control device;

the optical phase control device is connected with the driving chip;

2. The imaging apparatus according to claim 1,

the optical phased device is one or more optical phased arrays.

3. The imaging apparatus of claim 1, wherein the optical phased device is a first type optical phased array,

4. The imaging apparatus according to claim 3,

the incident surface of the phased array faces the light emergent surface of the optical receiving device;

5. The imaging apparatus according to claim 1, wherein the optical phased device is a second type optical phased array including a first cover layer, a second cover layer, a liquid crystal layer, and a control electrode;

6. The imaging apparatus according to claim 5,

the liquid crystal layer includes a plurality of liquid crystal crystals arranged in an array form, wherein each of the plurality of liquid crystal crystals is parallel to the first cover layer and the second cover layer.

7. The imaging apparatus according to claim 5,

the first covering layer faces the light-emitting surface of the optical receiving device;

the second cover layer faces an absorption surface of the image sensor.

8. The imaging apparatus according to claim 7,

the first covering layer and the second covering layer respectively comprise a transparent electrode and a glass substrate.

9. The imaging apparatus according to claim 1, wherein the optical receiving device includes: the lens group is used for realizing light refraction, and the optical filter is used for realizing light filtration;

10. The imaging apparatus according to claim 9,

the lens group comprises a plurality of lenses which are sequentially fixed in parallel according to a preset sequence;