CN113949787A

CN113949787A - Optical filter assembly, lens module, electronic device, imaging method and storage medium

Info

Publication number: CN113949787A
Application number: CN202010622683.XA
Authority: CN
Inventors: 尹志东; 王辉; 郑严
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2022-01-18
Anticipated expiration: 2040-06-30
Also published as: CN113949787B

Abstract

The present disclosure relates to an optical filter assembly, a lens module, an electronic apparatus, an imaging method, and a storage medium, wherein the optical filter assembly includes: a first optical filter; the second optical filter is arranged opposite to the first optical filter; a liquid layer disposed between the first filter and the second filter; when the liquid layer is in an uncompressed state, the distance between the first optical filter and the second optical filter is a first distance; when the liquid layer is in a compressed state, the distance between the first optical filter and the second optical filter is a second distance; the first pitch is greater than the second pitch. By adjusting the distance between the first filter and the second filter, the overall thickness of the filter assembly can be adjusted, and therefore the overall thickness of the filter assembly can be adjusted according to the object distance. Therefore, the problem that the analysis force generated when the photographic objects with different object distances are photographed is seriously reduced because the thickness of the optical filter is not changed is solved.

Description

Optical filter assembly, lens module, electronic device, imaging method and storage medium

Technical Field

The present disclosure relates to the field of imaging technologies, and in particular, to an optical filter assembly, a lens module, an electronic device, an imaging method, and a storage medium.

Background

At present, when a camera is used for shooting, the resolving power of the camera is seriously reduced due to different object distances between a shooting object and a lens. Particularly, when the object distance is from a relatively long distance to a distance of only about 10cm, or even a short distance, the shot picture is locally blurred. The main reason for this is that the resolution of the close-range photographing lens is severely reduced due to the deterioration of image quality caused by the field curvature aberration caused by the difference in object distance.

With the change of the object distance, although the image quality is good after the auto-focusing, the image quality at the intermediate position is deteriorated. And this phenomenon becomes more and more apparent as the object distance becomes closer. This occurs, for example, when a close-up a4 sheet is shot with a normal portrait shot.

Some cameras in the related art have relatively sacrificed the resolution of long-distance photographing in order to improve the quality of short-distance photographing, and mainly improve the resolution of short-distance photographing. However, the improvement effect of the scheme on the close-range photographing is not obvious, and the resolving power of the close-range photographing is also sacrificed, so that the effect of the camera on the close-range photographing and the long-range photographing is not good enough.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides an optical filter assembly, a lens module, an electronic device, an imaging method, and a storage medium.

According to a first aspect of embodiments of the present disclosure, there is provided an optical filter assembly including:

a first optical filter;

the second optical filter is arranged opposite to the first optical filter; and

a liquid layer disposed between the first filter and the second filter;

when the liquid layer is in an uncompressed state, the distance between the first optical filter and the second optical filter is a first distance;

when the liquid layer is in a compressed state, the distance between the first optical filter and the second optical filter is a second distance;

the first pitch is greater than the second pitch.

In a further embodiment of the present disclosure, the optical filter assembly further includes a driving device that drives at least one of the first optical filter and the second optical filter to move along an optical axis direction of the first optical filter or the second optical filter.

In a further embodiment of the present disclosure, the liquid layer includes an elastically deformable sealing member, and a liquid filled in the sealing member.

In a further embodiment of the present disclosure, the first filter and the second filter are attached to the sealing member.

In a further embodiment of the present disclosure, the driving device comprises a first driving device and a second driving device; the first driving device is connected to the first optical filter to drive the first optical filter to move along the optical axis direction of the first optical filter; the second driving device is connected to the second optical filter to drive the second optical filter to move along the optical axis direction of the second optical filter.

According to a second aspect of the embodiments of the present disclosure, there is provided a lens module, including: a lens; and a filter assembly, the filter assembly being the filter assembly of any one of the above embodiments; the lens and the optical filter component are positioned on the same light path.

In a further embodiment of the present disclosure, further comprising: the photosensitive element is used for acquiring object distance information from the lens to a shot object; a controller that receives the object distance information from the photosensitive element; the controller is electrically connected with a driving device of the optical filter component so as to control the driving device to drive at least one of the first optical filter and the second optical filter to move along the optical axis direction of the first optical filter or the second optical filter.

In a further embodiment of the present disclosure, in a case when the object distance information is greater than the preset threshold, the controller controls the driving device to drive at least one of the first optical filter and the second optical filter to move toward a direction in which the first optical filter and the second optical filter approach each other; and under the condition that the object distance information is smaller than the preset threshold value, the controller controls the driving device to drive at least one of the first optical filter and the second optical filter to move towards the direction in which the first optical filter and the second optical filter are far away from each other.

In a further embodiment of the present disclosure, the lens module further includes an accommodating space; when the liquid layer is in a compressed state, the part of the liquid layer, which is outside the first filter and the second filter, is accommodated in the accommodating space.

According to a third aspect of the embodiments of the present disclosure, an electronic device is provided, which includes the lens module set in any one of the above embodiments.

According to a fourth aspect of the embodiments of the present disclosure, there is provided an imaging method applied to the lens module set in any one of the above embodiments, including: acquiring object distance information between a lens and a shot object; determining a moving direction and a moving distance of at least one of a first filter and a second filter in a filter assembly along an optical axis direction of the first filter or the second filter according to the acquired object distance information; and controlling a driving device to drive at least one of the first optical filter and the second optical filter to perform relative movement according to the determined movement direction and the movement distance.

In a further embodiment of the present disclosure, the determining a moving direction and a moving distance of at least one of the first filter and the second filter along an optical axis direction of the first filter or the second filter according to the acquired object distance information includes: in a case where the object distance information is greater than a preset threshold value, the moving direction is determined as a direction in which the first optical filter and the second optical filter approach each other; in a case where the object distance information is smaller than the threshold value, the moving direction is determined as a direction in which the first filter and the second filter move away from each other.

In a further embodiment of the present disclosure, the determining a moving direction and a moving distance of at least one of the first filter and the second filter along an optical axis direction of the first filter or the second filter according to the acquired object distance information includes: determining a relative movement distance of at least one of the first filter and the second filter according to the difference between the acquired object distance information and the threshold value.

According to a fifth aspect of embodiments of the present disclosure, there is provided an electronic apparatus including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: the imaging method described in any of the above embodiments is performed.

According to a sixth aspect of embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium, wherein instructions, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the imaging method of any one of the above embodiments.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

by making the liquid layer in an uncompressed state or a compressed state, the distance between the first filter and the second filter can be adjusted, and thus the overall thickness of the filter assembly including the first filter and the second filter can be adjusted. From this, can adjust the whole thickness of light filter subassembly according to the distance of object distance effectively through simple structure to can solve the problem that leads to the image quality variation because of the object distance is different, can improve the analytic power of camera, provide good experience of shooing for the user.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram illustrating a filter assembly when taking a picture from a distance according to an exemplary embodiment.

Fig. 2 is a schematic partial side view of a filter assembly during close-up photographing according to an exemplary embodiment.

Fig. 3 is a schematic structural diagram illustrating an optical filter assembly during close-up photographing according to an exemplary embodiment.

Fig. 4 is a schematic structural diagram illustrating a lens module for shooting a shot object at a long distance according to an exemplary embodiment.

Fig. 5 is a schematic structural diagram illustrating a lens module for shooting a shot object at a short distance according to an exemplary embodiment.

FIG. 6 is a schematic flow diagram illustrating an imaging method according to an exemplary embodiment.

FIG. 7 is a block diagram illustrating an apparatus in accordance with an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The optical filter assembly provided by the embodiments of the present disclosure may be applied to various electronic devices having a shooting function, such as a camera and a mobile phone, and in the following description of the embodiments, only the camera is taken as an example for description, but the present disclosure is not limited thereto.

Fig. 1 is a schematic structural diagram illustrating a filter assembly when taking a picture from a distance according to an exemplary embodiment. Fig. 2 is a schematic partial side view of a filter assembly during close-up photographing according to an exemplary embodiment. Fig. 3 is a schematic structural diagram illustrating an optical filter assembly during close-up photographing according to an exemplary embodiment. Fig. 4 is a schematic structural diagram illustrating a lens module for shooting a shot object at a long distance according to an exemplary embodiment. Fig. 5 is a schematic structural diagram illustrating a lens module for shooting a shot object at a short distance according to an exemplary embodiment.

Referring to fig. 1 to 3, the present disclosure provides a filter assembly that may be disposed in a lens module of a camera. As shown in fig. 1, the filter assembly may include a first filter 1, a second filter 2, and a liquid layer 3. The first filter 1 and the second filter 2 are arranged in parallel.

The liquid layer 3 is disposed between the first filter 1 and the second filter 2. The liquid layer 3 can be stretched between the first filter 1 and the second filter 2, whereby the pitch, i.e., the distance, of the first filter 1 with respect to the second filter 2 can be changed. That is, the distance between the first filter 1 and the second filter 2 can be adjusted by expansion and contraction of the liquid layer 3, and thus the overall thickness of the filter assembly can be adjusted.

Referring to fig. 4 and 5, when the liquid layer 3 is in an uncompressed state, that is, the liquid layer 3 is not pressed by an external force at all and is disposed between the first filter 1 and the second filter 2, a distance between the first filter 1 and the second filter 2 is a first distance G1. At this time, the entire thickness of the optical filter assembly is in the thickest state. When the liquid layer 3 is in a compressed state, that is, the liquid layer 3 is pressed by the first filter 1 or the second filter 2, and the distance between the first filter 1 and the second filter 2 is the second distance G2, the overall thickness of the filter assembly is relatively reduced, and the first distance G1 is greater than the second distance G2.

Under the action of an external force, the liquid layer 3 enables the first optical filter 1 and the second optical filter 2 to be in an infinite approaching and attaching state, the liquid layer 3 is in a completely compressed state, and liquid in the liquid layer 3 is completely extruded out. At this time, the entire thickness of the optical filter assembly is in a state of minimum thickness. At this time, the distance G2 between the first filter 1 and the second filter is infinitely close to 0. The relative movement distance of the first filter 1 and the second filter 2 is different according to the external force applied to the liquid layer 3, and the movement can be performed in the range from the first interval G1 to the second interval G2.

As shown in fig. 1, the liquid layer 3 is compressed, and the first filter 1 and the second filter 2 are close to each other, or as shown in fig. 3, the liquid layer 3 is in an initial state without external force, and the first filter 1 and the second filter 2 are far away from each other.

In the following description, the state in which the liquid layer 3 is uncompressed is defined as the initial state of the optical filter assembly. The present disclosure is not limited thereto and the state where the liquid layer 3 is compressed may be defined as an initial state of the optical filter assembly. The definition of the initial state can be defined according to the actual use condition.

As shown in fig. 1 to 3, the liquid layer 3 includes an elastically deformable sealing member 31 and a liquid 32 filled in the sealing member 31. The sealing member 31 has a certain waterproof property and elastic deformability. The liquid 32 can be stably sealed in the sealing member 31 by the waterproof capability of the sealing member 31. The sealing member 31 can be elastically deformed by the elastic deformation capability of the sealing member 31, whereby the liquid layer 3 can be expanded and contracted. Therefore, the liquid layer 3 can be expanded and contracted with the elastic deformation of the seal member 31, and the liquid sealed in the seal member 31 can be prevented from seeping out. Since the liquid layer 3 can expand and contract, the liquid layer 3 can be relatively flattened or restored to the original state during the relative movement of the first filter 1 and the second filter 2.

In addition, the first filter 1 and the second filter 2 are respectively attached to both sides of the sealing member 31 of the liquid layer 3 to relatively stably fix the sealing member 31 between the first filter 1 and the second filter 2.

For example, as the first filter 1 moves in a direction to approach the second filter 2, the liquid in the sealing member 31 of the liquid layer 3 is pressed, and the sealing member 31 receives a lateral pressing force from the liquid, and the sealing member 31 is elastically deformed outward by the lateral pressing force, so that the liquid 32 in the sealing member 31 is pushed into the sealing member 31 bulging outward when the first filter 1 and the second filter 2 approach each other at all. As the first filter 1 moves in a direction away from the second filter 2, the liquid 32 flows back between the first filter 1 and the second filter 2, the pressing force applied to the sealing member 31 decreases, the sealing member 31 gradually returns to the initial state, and finally, the state shown in fig. 3 is formed.

It should be noted that the sealing member 31 described above may have two structures, wherein one of the structures of the sealing member 31 may be a structure of a totally enclosed capsule, and the structure of the capsule is filled with the liquid 32, and then the capsule structure is disposed between the first optical filter 1 and the second optical filter 2. In addition, in order to avoid the displacement of the capsule structure from the position between the first optical filter 1 and the second optical filter 2, glue is dispensed between the upper end portion of the capsule structure and the first optical filter 1 and between the lower end portion of the capsule structure and the second optical filter 2, so as to further avoid the displacement of the capsule structure. The present disclosure is not limited thereto, and another displacement preventing structure may be provided between the capsule structure and the first filter 1 and the second filter 2, as long as the capsule structure can be prevented from moving and displacing between the first filter 1 and the second filter 2.

As another embodiment, the sealing member 31 may have four sheet-like structures that are elastically deformable and have waterproof properties, and the four sheet-like structures are fixed between the four edges of the first filter 1 and the second filter 2 and are hermetically connected to each other, so as to form one sealing member 31 between the first filter 1 and the second filter 2, and the sealing member 31 may also have the above-mentioned functions.

The liquid 32 filled in the sealing member 31 may be any liquid, and may be selected according to the optical characteristics of the first optical filter 1 and the second optical filter 2, for example, the liquid having optical performance close to that of the first optical filter 1 and the second optical filter 2 may be selected according to the characteristics of the first optical filter 1 and the second optical filter 2, such as the optical filtering performance, the refractive index, and the light reflection rate.

As shown in fig. 1, the optical filter assembly further includes a driving device 4, and the driving device 4 can drive at least one of the first optical filter 1 and the second optical filter 2 to move relatively along the direction of the optical axis C1 of the first optical filter 1 or the second optical filter 2. In actual use, any one of the first filter 1 and the second filter 2 may be driven to move relative to the other by controlling the driving device 4 according to requirements. For example, the driving device 4 may drive the first filter 1 to move relative to the second filter, or the driving device 4 may drive the second filter 2 to move relative to the first filter 1, or the driving device 4 may drive the first filter 1 and the second filter 2 to move relative to each other.

With the above configuration, when a camera is used to photograph an object having different distances, the first optical filter 1 can be driven to move relative to the second optical filter 2 according to the object distance information from the object to the lens, so that the entire thickness of the optical filter assembly can be adjusted, and the curvature of field aberration can be adjusted to improve the resolution of the camera in long-distance photographing and short-distance photographing. Therefore, compared with the phenomenon that the image quality is deteriorated due to large object distance change in the prior art, the method and the device can improve the image quality of the camera under different object distances, and can obtain high-definition pictures under both long-distance shooting and short-distance shooting conditions.

The above-mentioned drive means 4 comprise a first drive means 41 and a second drive means 42. The first driving device 41 is connected to the first optical filter 1, and is used for driving the first optical filter 1 to move along the direction of the optical axis C1 of the first optical filter 1; the second driving device 42 is connected to the second filter 2 for driving the second filter 2 to move along the optical axis C1 of the second filter 2.

The first and

second filters

1 and 2 are driven by the first and

second driving devices

41 and 42, respectively, so that the movement of the first or

second filter

1 or 2 can be controlled according to different requirements, and the relative movement of the first and

second driving devices

41 and 42 can be controlled with a very simple structure.

The first driving devices 41 have two driving devices (only one driving device is shown in the figure), and the two driving devices 41 may be respectively connected to both sides of the first filter 1. The second driving device 42 may have two driving devices (only one driving device is shown in the figure), and the two driving devices 42 may be respectively connected to both sides of the second filter 2. Through the two first driving devices 41 and the two second driving devices 42 respectively arranged at the two sides of the first optical filter 1 and the second optical filter 2, in the process of driving the first optical filter 1 and the second optical filter 2 to move relatively, the movement of the first optical filter 1 and the second optical filter 2 can be relatively and stably controlled, and meanwhile, the forces applied to the first optical filter 1 and the second optical filter 2 are relatively balanced, so that certain offset of the first optical filter 1 or the second optical filter 2 in the moving process is further avoided.

In addition, in the above-described embodiment, only one first driving device 41 and one second driving device 42 may be provided, and the first driving device 41 may be connected to one side of the first filter 1 and the second driving device 42 may be connected to the other side of the second filter 2, so that the first filter 1 may be driven by the first driving device 41 to move and the second filter 2 may be driven by the second driving device 42 to move.

In one embodiment, the field curvature aberration can be adjusted by changing the overall thickness of the filter assembly. Therefore, the second filter 2 may be relatively fixed while only the first filter 1 is relatively moved, and in this case, the driving device 4 may control only the first filter 1 to move along the optical axis direction of the first filter 1. In this case, the first driving device 41 is only required to achieve the above-described function. Only one first driving device 41 may be provided, or two first driving devices 41 may be provided on both sides of the first optical filter 1, and the specific arrangement structure may be set as required.

The first filter 1 may be fixed, only the second filter 2 may be relatively moved, and at this time, the driving device 4 may control the second filter 2 to move along the optical axis of the second filter 2, so that the above-mentioned function may be realized only by providing the second driving device 42. Only one second driving device 42 may be provided, or two second driving devices 42 may be provided on both sides of the second filter 2, and the specific arrangement structure may be set as required.

The driving device 4 may be any one of a voice coil motor, a servo motor, and a piezoelectric sensor, and one or more driving devices 4 may be selected and used as needed.

Based on the same concept, the embodiment of the present disclosure further provides a lens module, which includes a lens 5 and the optical filter assembly mentioned in the above embodiment, wherein the lens 5 and the optical filter assembly are located on the same optical path.

When the lens module with the optical filter assembly is used for shooting, the distance between the first optical filter 1 of the optical filter assembly and the second optical filter 2 can be adjusted according to the object distance from a shot object to a lens, so that the resolution of the lens module in long-distance shooting and short-distance shooting is improved, and the definition of a shot picture is improved.

The lens module further comprises an accommodating space, when the liquid layer 3 is in a compressed state, the part of the liquid layer 3, which is outside the first optical filter 1 and the second optical filter 2, is accommodated in the accommodating space, and because the edge of the liquid layer 3 bulges out relatively towards the parts of the first optical filter 1 and the second optical filter 2 when the liquid layer 3 is in the compressed state, the bulged part can be accommodated in the accommodating space.

The lens module further comprises an actuating device 7, wherein the actuating device 7 is connected to the lens 5 and is used for driving the lens 5 to move along the direction of the optical axis C1 of the lens 5, so that the position of the lens 5 can be adjusted according to shooting requirements.

The actuating devices 7 can be provided with two, the two actuating devices 7 are respectively arranged at two sides of the lens 5, and in the process of driving the lens 5 to move, the stress on the lens 5 is relatively stable due to the arrangement of the two actuating devices 7, so that the lens 5 can be stably driven to move in the optical axis direction.

It should be noted that the actuating devices 7 may be provided as one, and the actuating device 7 is connected to the lens 5, so that the movement of the lens 5 can be controlled by using the one actuating device 7.

The actuator 7 is any one of a voice coil motor, a servo motor, and a piezoelectric sensor, and one of the actuators 7 is selected and used as necessary.

In one embodiment, the lens module further includes a lens holder 8, and the driving device 4 and the actuator 7 are fixed on the lens holder 8, so as to provide a fixable space for the driving device 4 and the actuator 7.

In one embodiment, as shown in fig. 1, the lens module further includes a photosensitive element 6 and a controller (not shown), wherein the photosensitive element 6 is used for detecting object distance information between the lens 5 and a shot object; the controller receives the object distance information from the photosensitive element 6, and is electrically connected with the driving device 4 of the optical filter component to control the driving device 4 to drive at least one of the first optical filter 1 and the second optical filter 2 to move.

When shooting an object, the relative distance between the first optical filter 1 and the second optical filter 2 needs to be adjusted due to different object distances, so that the object distance information between the lens 5 and the object needs to be acquired by the photosensitive element 6 at this time, and then the acquired object distance information is transmitted to the controller, and after receiving the object distance information, the controller controls the operation of the driving device 4 of the optical filter assembly according to the object distance information, so that at least one of the first optical filter 1 and the second optical filter 2 moves to adjust the distance between the first optical filter 1 and the second optical filter 2.

The controller is preset with a threshold value related to the object distance information, and after the photosensitive element 6 transmits the acquired object distance information to the controller, the controller judges whether the acquired object distance information is larger than the preset threshold value.

Referring to fig. 1, when the object distance information is greater than the threshold value, it is determined that the distance between the object and the lens 5 is relatively long, and the controller controls the driving device 4 to drive at least one of the first optical filter 1 and the second optical filter 2 to move in a direction in which the first optical filter 1 and the second optical filter 2 approach each other, so that the overall thickness of the optical filter assembly is relatively thin, and the resolution of the long-distance shooting is improved.

For example, the driving device 4 may drive the first filter 1 to move in a direction to approach the second filter 2, the driving device 4 may drive the second filter 2 to move in a direction to approach the first filter 1, or the driving device 4 may drive the first filter 1 and the second filter 2 to move in a direction to approach each other at the same time.

Referring to fig. 2, when the object distance information is smaller than the threshold, the controller controls the driving device 4 to drive at least one of the first filter 1 and the second filter 2 to move in a direction in which the first filter 1 and the second filter 2 are away from each other.

For example, the driving device 4 may drive the first filter 1 to move in a direction away from the second filter 2, the driving device 4 may drive the second filter 2 to move in a direction away from the first filter 1, or the driving device 4 may drive the first filter 1 and the second filter 2 to move in a direction away from each other at the same time.

In a configuration in which the optical filter assembly is configured such that the first optical filter 1 is relatively movable and the second optical filter 2 is relatively fixed, when the object distance information is greater than the threshold value, that is, when the distance between the object and the lens 5 is relatively long, the controller controls the driving device 4 to drive the first optical filter 1 to move in a direction away from the lens 5; when the object distance information is smaller than the threshold value, that is, when the distance between the shot object and the lens 5 is relatively short, the controller controls the driving device 4 to drive the first optical filter 1 to move towards the direction close to the lens 5.

In the structure that the optical filter assembly is provided with the first optical filter 1 fixed and the second optical filter 2 capable of relatively moving, when the object distance information is larger than the threshold value, namely the distance between the shot object and the lens 5 is relatively long, the controller controls the driving device 4 to drive the second optical filter 2 to move towards the direction close to the lens 5; when the object distance information is smaller than the threshold value, that is, when the distance between the shot object and the lens 5 is relatively short, the controller controls the driving device 4 to drive the second filter 2 to move towards the direction away from the lens 5.

The lens module can adjust the whole thickness of the optical filter component according to the distance between a shot object and the lens, thereby realizing high resolution under long-distance shooting and high resolution under short-distance shooting.

Based on the same concept, an embodiment of the present disclosure further provides an electronic device, where the electronic device includes the lens module in the above embodiment, and the electronic device may be an electronic device such as a camera or a mobile phone.

After the lens module is arranged on the electronic equipment, when shooting objects with different distances, the whole thickness of the optical filter component in the lens module can be adjusted according to the object distance, the field curvature aberration can be adjusted by relatively adjusting the thickness of the optical filter along with the closer object distance, and compared with the phenomenon of picture quality deterioration caused by large object distance change in the related technology, the imaging device can also provide high resolution under the condition of large object distance change.

Based on the same concept, the embodiment of the disclosure further provides an imaging method, which is applied to the lens module related in the embodiment. FIG. 6 is a schematic flow diagram illustrating an imaging method according to an exemplary embodiment. As shown in fig. 6, the imaging method includes the following steps.

In step S11, object distance information between the subject and the lens 5 is acquired.

The object distance information between the shot object and the lens 5 can be acquired through the photosensitive element 6 in the lens module, and the object distance information is transmitted to the controller.

In step S12, a moving direction and a moving distance of at least one of the first filter 1 and the second filter 2 along the optical axis direction of the first filter 1 or the second filter 2 are determined based on the acquired object distance information.

In the embodiment of the present disclosure, after the object distance information is obtained, the object distance information is transmitted to the controller, and after the controller receives the object distance information, the controller performs operations such as judgment and calculation on the object distance information, and compares the object distance information with a threshold of the object distance information preset in the controller, so as to determine a moving direction and a moving distance of at least one of the first optical filter 1 and the second optical filter 2 along the optical axis direction of the first optical filter 1 or the second optical filter 2.

In an embodiment of the present disclosure, when the object distance information is greater than a preset threshold, the moving direction is determined as a direction in which the first optical filter and the second optical filter approach each other.

In an embodiment of the present disclosure, when the object distance information is smaller than the threshold, the moving direction is determined as a direction in which the first optical filter and the second optical filter move away from each other.

In the embodiment of the present disclosure, the relative movement distance between the first optical filter and the second optical filter is determined according to the difference between the acquired object distance information and the threshold.

In the embodiment of the disclosure, when the object distance information is greater than a preset threshold, the first optical filter is driven to move towards a direction away from the lens.

In the embodiment of the disclosure, when the object distance information is smaller than a preset threshold, the first optical filter is driven to move towards a direction close to the lens.

In step S13, at least one of the first filter 1 and the second filter 2 is driven to move relatively according to the determined moving direction and the determined moving distance.

The controller may control at least one of the first filter 1 and the second filter 2 to move relatively so that at least one of the first filter 1 and the second filter 2 moves the moving distance determined in step S12 along the moving direction determined in step S12, and then photograph the photographed object so that the photographed image is clearer.

In an embodiment of the present disclosure, a relative movement distance of at least one of the first filter and the second filter is determined according to a difference between the acquired object distance information and the threshold value.

In the embodiment of the present disclosure, as shown in fig. 4 and 5, the threshold of the lens preset in the controller is, for example, H0. The minimum thickness of the optical filter box is D1, that is, as shown in fig. 4, when the first optical filter 1 and the second optical filter 2 are infinitely close to each other to be attached, the thickness of the optical filter box is the sum of the thickness of the first optical filter 1 and the thickness of the second optical filter 2, which is the minimum thickness D1. The maximum thickness of the filter assembly is D2, and as shown in fig. 5, when the first filter 1 and the second filter 2 are far apart to the maximum distance (the liquid layer 3 is completely restored to the initial state), the thickness of the filter assembly is the thickness of the first filter 1 plus the thickness of the liquid layer 3 plus the amount of the second filter 2, which is the maximum thickness D2.

When the subject 20 is photographed by the lens 5, the distance between the lens 5 and the subject 20, that is, the subject distance H1 is detected by the light receiving element 6. At this time, the object distance H1 from the lens 5 to the photographic subject 20 is greater than the preset threshold H0 of the controller, that is, H1 is greater than H0, and at this time, the controller controls the driving device 4 to drive at least one of the first optical filter 1 and the second optical filter 2 to move towards the direction in which the first optical filter 1 and the second optical filter 2 approach each other, so that the overall thickness of the optical filter assembly is relatively thin. When the object distance between the lens 5 and the object 20 is far enough, the first filter 1 and the second filter 2 of the filter assembly approach to each other infinitely to be in a bonding state, and the overall thickness of the filter assembly is the minimum thickness D1.

As shown in fig. 5, when the object distance of the object 20 to be photographed from the lens 5 is relatively small, the photosensitive element 6 detects that the object distance between the lens 5 and the object is H2, and the object distance H2 between the lens 5 and the object 20 is smaller than the threshold H0 preset by the controller, that is, H2 is smaller than H0. At this time, the controller controls the driving device 4 to drive at least one of the first optical filter 1 and the second optical filter 2 to move towards a direction in which the first optical filter 1 and the second optical filter 2 are away from each other, so that the overall thickness of the optical filter box is relatively thick, when the object distance between the lens 5 and the photographed object is relatively small and the object distance is kept to be smaller than a certain value, the first optical filter 1 and the second optical filter 2 of the optical filter box are separated from each other and reach the maximum separation amplitude, and at this time, the overall thickness of the optical filter box reaches the maximum thickness D2.

Accordingly, in the process of gradually changing the object distance between the object 20 and the lens 5, the relative movement distance between the first filter 1 and the second filter 2 in the filter assembly changes according to the distance between the object 20 and the lens 5, and the overall thickness of the filter assembly ranges from the minimum thickness D1 to the maximum thickness D2.

For example, in the embodiment of the present disclosure, when the filter assembly is configured such that the first filter 1 is relatively movable and the second filter 2 is fixed, when the object distance is greater than the threshold value, that is, when the distance between the photographic object 20 and the lens 5 is relatively long, the controller controls the driving device 4 to drive the first filter 1 to move in a direction away from the lens 5; when the object distance is smaller than the threshold value, that is, when the distance between the photographic object 20 and the lens 5 is relatively short, the controller controls the driving device 4 to drive the first filter 2 to move towards the direction close to the lens 5.

Based on the same concept, the embodiment of the present disclosure also provides an imaging apparatus, which includes a processor and a memory for storing processor-executable instructions, wherein the processor is configured as the imaging method referred to in the above embodiments.

Based on the same concept, the embodiments of the present disclosure also provide a non-transitory computer-readable storage medium, which when executed by a processor of a mobile terminal, enables the mobile terminal to perform the imaging method in the above embodiments.

Based on the same concept, the embodiment of the present disclosure further provides an imaging device, which controls the relative movement of the first optical filter 1 and the second optical filter 2 according to the object distance between the shot object and the lens, so as to adjust the overall thickness of the optical filter assembly.

It is understood that the imaging device provided by the embodiment of the present disclosure includes a hardware structure and/or a software module for performing the above functions. The embodiments of the present disclosure can be realized in hardware or a combination of hardware and computer software in combination with the steps of the examples disclosed in the embodiments of the present disclosure. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

Fig. 7 is a block diagram illustrating an apparatus 200 for imaging according to an exemplary embodiment. For example, the apparatus 200 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 7, the apparatus 200 may include one or more of the following components: a processing component 202, a memory 204, a power component 206, a multimedia component 208, an audio component 210, an input/output (I/O) interface 212, a sensor component 214, and a communication component 216.

The processing component 202 generally controls overall operation of the device 200, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 202 may include one or more processors 220 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 202 can include one or more modules that facilitate interaction between the processing component 202 and other components. For example, the processing component 202 can include a multimedia module to facilitate interaction between the multimedia component 208 and the processing component 202.

The memory 204 is configured to store various types of data to support operations at the apparatus 200. Examples of such data include instructions for any application or method operating on the device 200, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 204 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 206 provide power to the various components of device 200. Power components 206 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for device 200.

The multimedia component 208 includes a screen that provides an output interface between the device 200 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 208 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 200 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 210 is configured to output and/or input audio signals. For example, audio component 210 includes a Microphone (MIC) configured to receive external audio signals when apparatus 200 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 204 or transmitted via the communication component 216. In some embodiments, audio component 210 also includes a speaker for outputting audio signals.

The I/O interface 212 provides an interface between the processing component 202 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor component 214 includes one or more sensors for providing various aspects of status assessment for the device 200. For example, the sensor assembly 214 may detect the status of the insertion/removal of the optical path of the device 200, the relative positioning of components, such as a display and keypad of the device 200, the sensor assembly 214 may also detect a change in the position of the device 200 or a component of the device 200, the presence or absence of user contact with the device 200, the orientation or acceleration/deceleration of the device 200, and a change in the temperature of the device 200. The sensor assembly 214 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 214 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 214 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 216 is configured to facilitate wired or wireless communication between the apparatus 200 and other devices. The device 200 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 216 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 216 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 200 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as memory 204, comprising instructions executable by processor 220 of device 200 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An optical filter assembly, comprising:

a first optical filter;

the second optical filter is arranged opposite to the first optical filter; and

a liquid layer disposed between the first filter and the second filter;

the first pitch is greater than the second pitch.

2. The filter assembly according to claim 1,

the optical filter assembly further comprises a driving device, wherein the driving device drives at least one of the first optical filter and the second optical filter to move along the optical axis direction of the first optical filter or the second optical filter.

3. The filter assembly according to claim 2,

the liquid layer includes an elastically deformable sealing member, and a liquid filled in the sealing member.

4. An optical filter assembly as recited in claim 3,

the first optical filter and the second optical filter are attached to the sealing component.

5. The filter assembly according to claim 2,

the driving device comprises a first driving device and a second driving device;

the first driving device is connected to the first optical filter to drive the first optical filter to move along the optical axis direction of the first optical filter;

the second driving device is connected to the second optical filter to drive the second optical filter to move along the optical axis direction of the second optical filter.

6. A lens module, comprising:

a lens; and

an optical filter assembly, the optical filter assembly being the optical filter assembly of any one of claims 1 to 5;

the lens and the optical filter component are positioned on the same light path.

7. The lens module as claimed in claim 6, further comprising:

the photosensitive element is used for acquiring object distance information from the lens to a shot object;

a controller that receives the object distance information from the photosensitive element;

the controller is electrically connected with a driving device of the optical filter component so as to control the driving device to drive at least one of the first optical filter and the second optical filter to move along the optical axis direction of the first optical filter or the second optical filter.

8. The lens module as recited in claim 7,

under the condition that the object distance information is larger than a preset threshold value, the controller controls the driving device to drive at least one of the first optical filter and the second optical filter to move towards the direction in which the first optical filter and the second optical filter approach each other;

and under the condition that the object distance information is smaller than the preset threshold value, the controller controls the driving device to drive at least one of the first optical filter and the second optical filter to move towards the direction in which the first optical filter and the second optical filter are far away from each other.

9. The lens module as recited in claim 6,

the lens module further comprises an accommodating space;

when the liquid layer is in a compressed state, the part of the liquid layer, which is outside the first filter and the second filter, is accommodated in the accommodating space.

10. An electronic device, comprising the lens module of any one of claims 6 to 9.

11. An imaging method applied to the lens module set of any one of claims 6 to 9, comprising:

acquiring object distance information between a lens and a shot object;

determining a moving direction and a moving distance of at least one of a first filter and a second filter in a filter assembly along an optical axis direction of the first filter or the second filter according to the acquired object distance information;

and controlling a driving device to drive at least one of the first optical filter and the second optical filter to perform relative movement according to the determined movement direction and the movement distance.

12. The imaging method according to claim 11,

the determining a moving direction and a moving distance of at least one of the first optical filter and the second optical filter along an optical axis direction of the first optical filter or the second optical filter according to the acquired object distance information includes:

in a case where the object distance information is greater than a preset threshold, the moving direction is determined as a direction in which the first optical filter and the second optical filter approach each other;

and when the object distance information is smaller than the preset threshold value, determining the moving direction as a direction in which the first optical filter and the second optical filter move away from each other.

13. The imaging method according to claim 12,

determining a relative movement distance of at least one of the first filter and the second filter according to the difference between the acquired object distance information and the threshold value.

14. An electronic device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: performing the imaging method of any one of claims 11 to 13.

15. A non-transitory computer readable storage medium having instructions therein which, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the imaging method of any one of claims 11 to 13.