Lens and imaging apparatus

Abstract

The invention discloses a lens and imaging equipment, the lens comprises a lens main body, an imaging structure and a driving mechanism, the lens main body is provided with an object side end and an image side end which are oppositely arranged, and an optical axis is formed in the lens main body; the imaging structure is arranged at the image side end of the lens main body, the imaging structure is rotatably arranged, and the imaging structure comprises an image surface; the driving mechanism is used for driving the imaging structure to rotate so as to adjust the angle between the image surface and the optical axis, the imaging structure is driven by the driving mechanism to rotate, and when the imaging structure rotates, the image surface rotates synchronously, so that the image surface can incline according to the required inclination angle; performing picture correction processing on scenes with different object distances; therefore, a complete and clear portrait can be obtained, and the problem that an existing lens cannot carry out clear and complete imaging when the object distances are inconsistent is solved.

Description

Technical Field

[0001] The present invention relates to the field of imaging technology, and in particular to a lens and an imaging device. Background Art

[0002] As people's requirements for imaging quality increase, there are more and more large-aperture lenses. For 4K and large-aperture lenses, the design specifications determine that the focal depth of such products is very shallow, and the image sensor can only solve the optimal imaging problem of a plane object distance in the AA process; when the product is applied to actual scenes, since most scenes are shot from above, there will be a problem of inconsistent object distances during shooting, resulting in half-blurred images and a poor user experience. Summary of the invention

[0003] The main purpose of the present invention is to provide a lens and an imaging device, aiming to solve the problem that the existing lens cannot form a clear and complete image when the object distance is inconsistent.

[0004] To achieve the above object, the present invention provides a lens, comprising:

[0005] A lens body having an object side end and an image side end which are arranged opposite to each other, and an optical axis is formed in the lens body;

[0006] An imaging structure, disposed at the image side end of the lens body, the imaging structure is rotatably disposed, and the imaging structure includes an image plane; and

[0007] The driving mechanism is used to drive the imaging structure to rotate so as to adjust the angle between the image plane and the optical axis.

[0008] Optionally, the lens body includes a seat body;

[0009] The imaging structure comprises a mounting bracket, the image plane is mounted on the mounting bracket, the mounting bracket comprises a rotating shaft extending in the longitudinal direction, the mounting bracket is rotatably mounted on the base body via the rotating shaft, and the mounting bracket comprises a first end and a second end which are arranged opposite to each other in the transverse direction;

[0010] The driving mechanism is arranged laterally apart from the rotating shaft, and is used to drive the first end of the mounting bracket to move in an up-and-down direction, so as to drive the imaging structure to rotate when the first end of the mounting bracket rotates around the rotating shaft.

[0011] Optionally, the driving mechanism comprises:

[0012] The screw rod extends in the up-down direction and is rotatably arranged around its axis;

[0013] A driving nut is sleeved on the outer periphery of the screw rod and is driven by the screw rod to move in an up-and-down direction when the screw rod rotates;

[0014] A pressure plate is located above the mounting bracket, the pressure plate is fixedly connected to the driving nut, so as to be driven by the driving nut to move in an up-and-down direction, and to press against the first end of the mounting bracket to move downward in a downward movement stroke; and

[0015] The reset member is used to provide a reset force when the first end of the mounting bracket moves upward.

[0016] Optionally, the driving mechanism further comprises:

[0017] A driving device, comprising an output shaft extending in an up-down direction, wherein a driving gear is disposed at an end of the output shaft;

[0018] A driven gear is coaxially connected to the lead screw; and

[0019] A transmission gear set is connected to the driving gear and the drive gear, and is used for the driving gear to drive the driven gear to drive the screw to rotate when the output shaft drives the driving gear to rotate.

[0020] Optionally, an abutment portion is provided at the bottom of the pressure plate, and when the first end of the mounting bracket rotates around the rotating shaft, the abutment portion abuts against the first end of the mounting bracket, and the surface of the abutment portion is set to be an arc surface.

[0021] Optionally, the mounting bracket is located above the seat body;

[0022] The reset member comprises a compression spring, and the compression spring is arranged between the first end of the mounting bracket and the seat body.

[0023] Optionally, the driving mechanism further comprises a guide column disposed on the seat body, the guide column extends in an up-down direction, and the compression spring is sleeved on the periphery of the guide column.

[0024] Optionally, the pressure plate is penetrated by a through hole extending in an up-and-down direction, the guide column is passed through the through hole, a limiting portion is provided on the top of the guide column, and the limiting portion is exposed in the through hole.

[0025] Optionally, the lens further includes a control device, and the control device is electrically connected to the driving mechanism and is used to control the operation of the driving mechanism.

[0026] The present invention further provides an imaging device, the imaging device comprising a lens, the lens comprising:

[0027] A lens body having an object side end and an image side end which are arranged opposite to each other, and an optical axis is formed in the lens body;

[0028] An imaging structure, disposed at the image side end of the lens body, the imaging structure is rotatably disposed, and the imaging structure includes an image plane; and

[0029] The driving mechanism is used to drive the imaging structure to rotate so as to adjust the angle between the image plane and the optical axis.

[0030] In the technical solution provided by the present invention, the driving mechanism drives the imaging structure to rotate. When the imaging structure rotates, the image plane rotates synchronously, so that the image plane can be tilted according to the required tilt angle, and image correction processing is performed for scenes with different object distances; thereby, a complete and clear image can be obtained, thereby solving the problem that the existing lens cannot form a clear and complete image when the object distance is inconsistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 A three-dimensional schematic diagram of an embodiment of a lens provided by the present invention;

[0033] Figure 2 for Figure 1 A schematic top view of the lens in FIG.

[0034] Figure 3 for Figure 1 A three-dimensional schematic diagram of the imaging structure and the driving mechanism;

[0035] Figure 4 for Figure 3 Enlarged schematic diagram at point A in the middle.

[0036] Description of Figure Numbers:

[0037]

[0038]

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] As people's requirements for imaging quality increase, there are more and more large-aperture lenses. For 4K and large-aperture lenses, the design specifications determine that the focal depth of such products is very shallow, and the image sensor can only solve the optimal imaging problem of a plane object distance in the AA process; when the product is applied to actual scenes, since most scenes are shot from above, there will be a problem of inconsistent object distances during shooting, resulting in half-blurred images and a poor user experience.

[0044] In order to solve the above problems, the present invention provides a lens. Figure 1 A three-dimensional schematic diagram of an embodiment of a lens provided by the present invention; Figure 2 for Figure 1 A schematic top view of the lens in FIG. Figure 3 for Figure 1 A three-dimensional schematic diagram of the imaging structure and the driving mechanism; Figure 4 for Figure 3 Enlarged schematic diagram at point A in the middle.

[0045] See also Figures 1 to 3The lens comprises a lens body 1, an imaging structure 2 and a driving mechanism 3, wherein the lens body 1 has an object side end and an image side end which are arranged opposite to each other, and an optical axis is formed in the lens body 1; the imaging structure 2 is arranged at the image side end of the lens body 1, and the imaging structure 2 is rotatably arranged, and the imaging structure 2 comprises an image plane; the driving mechanism 3 is used to drive the imaging structure 2 to rotate so as to adjust the angle between the image plane and the optical axis.

[0046] It should be noted that, for the sake of convenience, the following description is based on the use of the lens on a monitoring device. When the object distance is inconsistent, first determine the focus object distance between the monitoring object and the target monitoring device and the angle between the object plane and the optical axis according to the installation height of the target monitoring device, the height of the monitoring object and the preset horizontal monitoring distance; then determine the required focal length according to the preset number of recognition pixels, the pixel size of the imaging chip in the target monitoring device, the focus object distance and the width of the monitoring object; finally, determine the tilt angle of the image plane in the target monitoring device according to the angle between the object plane and the optical axis, the required focal length and the focus object distance.

[0047] In the technical solution provided by the present invention, the driving mechanism 3 drives the imaging structure 2 to rotate. When the imaging structure 2 rotates, the image plane rotates synchronously, so that the image plane can be tilted according to the required tilt angle, and image correction processing is performed for scenes with different object distances; thereby, a complete and clear image can be obtained, thereby solving the problem that the existing lens cannot form a clear and complete image when the object distance is inconsistent.

[0048] Specifically, the driving mechanism 3 can be provided with a motor, and the output shaft of the motor is fixed to the imaging structure 2. When the output shaft of the motor rotates, the imaging structure 2 is driven to rotate. However, considering that when the inclination angle of the imaging structure 2 is small, the motor driving method cannot accurately control the inclination angle of the imaging structure 2. Therefore, please refer to Figure 3 to Figure 4 In this embodiment, the lens body 1 includes a base 11, and the imaging structure 2 includes a mounting bracket 22; the image plane is mounted on the mounting bracket 22, and the mounting bracket 22 includes a rotating shaft 23 extending in the longitudinal direction. The mounting bracket 22 is rotatably mounted on the base 11 through the rotating shaft 23, and the mounting bracket 22 includes a first end and a second end that are oppositely arranged in the transverse direction; the driving mechanism 3 and the rotating shaft 23 are arranged at intervals in the transverse direction, and the driving mechanism 3 is used to drive the first end of the mounting bracket 22 to move in the up and down directions, so as to drive the imaging structure 2 to rotate when the first end of the mounting bracket 22 rotates around the rotating shaft 23.

[0049] In this way, in order to obtain a smaller tilt angle, the driving mechanism 3 drives the first end of the mounting bracket 22 to rotate around its rotation axis 23, and the distance of the first end of the mounting bracket 22 in the up-down direction can be calculated by the required rotation angle, thereby achieving the adjustment of the tilt angle of the imaging structure 2. The adjustment accuracy of the distance in the up-down direction is easier to control, so for the adjustment of small angles, the technical means adopted by the present invention can achieve better results.

[0050] Specifically, in this embodiment, the driving mechanism 3 includes a screw rod 31, a driving nut 32, a pressure plate 33 and a reset member 34. The screw rod 31 extends in the up-down direction and is rotatably arranged around its axis. The driving nut 32 is sleeved on the periphery of the screw rod 31 and is driven by the screw rod 31 to move in the up-down direction when the screw rod 31 rotates. The screw rod 31 and the driving nut 32 form a screw rod 31 driving structure, and the driving nut 32 can be driven to move up and down by driving the screw rod 31 to rotate.

[0051] The pressing plate 33 is located above the mounting bracket 22, and is fixedly connected to the driving nut 32 so as to be driven by the driving nut 32 to move in the up and down directions. Thus, when the driving nut 32 is driven to move downward, the pressing plate 33 is driven to move downward, and in the downward movement stroke, the first end of the mounting bracket 22 is pressed against to move downward, so that the mounting bracket 22 can be adjusted to rotate in the clockwise direction by the pressing plate 33, and the imaging structure 2 can be driven to adjust the angle. In order to enable the mounting bracket 22 to rotate in the counterclockwise direction, the reset member 34 is provided to provide a reset force when the first end of the mounting bracket 22 moves upward. In this way, when the mounting bracket 22 needs to rotate counterclockwise and the first end of the mounting bracket 22 needs to move upward, the screw rod 31 can be rotated in the opposite direction so that the drive nut 32 can move upward, so that the first end of the mounting bracket 22 is not constrained by the pressure plate 33, and the reset member 34 simultaneously drives the first end of the mounting bracket 22 to move upward, thereby enabling the mounting bracket 22 to rotate counterclockwise.

[0052] Specifically, since the imaging structure 2 itself has a certain weight, and other components such as a heat dissipation component are also provided on the imaging structure 2, the driving force required for the imaging structure 2 to rotate is relatively large, and when the external temperature changes, the materials of the components in the lens will be slightly deformed, and the damping of the mutual cooperation will increase, so the required driving force is larger. However, in a limited space, the output torque of the installed driving device 35 is generally limited. Therefore, in this embodiment, the driving mechanism 3 also includes a driving device 35, a driven gear 37 and a transmission gear set 3. 8. The driving device 35 has an output shaft 23 extending in the vertical direction, and a driving gear 36 is arranged at the end of the output shaft 23. The driving device 35 can be set as a small stepping motor; the driven gear 37 is coaxially connected with the screw rod 31, so as to drive the screw rod 31 to rotate while the driven gear 37 rotates; the transmission gear set 38 is transmission-connected with the driving gear 36 and the driven gear 37, so that when the output shaft 23 drives the driving gear 36 to rotate, the driving gear 36 can drive the driven gear 37 to drive the screw rod 31 to rotate. In this way, when the driving device 35 is working, the output shaft 23 can drive the driving gear 36 to rotate as a power output device, and increase the torque through the transmission gear set 38, so as to meet the power requirements of the imaging structure 2 to rotate and tilt.

[0053] Furthermore, in this embodiment, the bottom of the pressing plate 33 is provided with an abutting portion 331. When the first end of the mounting bracket 22 rotates around the rotating shaft 23, the abutting portion 331 abuts against the first end of the mounting bracket 22. The surface of the abutting portion 331 is set as an arc surface. In this way, when the mounting bracket 22 rotates, there is relative sliding between the first end of the mounting bracket 22 and the pressing plate 33, and the position of the abutting point between the two will change with the rotation of the mounting bracket 22. The surface of the abutting portion 331 is set as an arc surface. The arc surface can always fit the first end of the mounting bracket 22 during the rotation stroke of the mounting bracket 22, thereby preventing the mounting bracket 22 from interfering with other parts of the pressing plate 33 during the rotation stroke, thereby affecting the rotation angle of the mounting bracket 22.

[0054] Specifically, in this embodiment, the mounting bracket 22 is located above the seat body 11 ; the reset member 34 includes a compression spring, and the compression spring is disposed between the first end of the mounting bracket 22 and the seat body 11 .

[0055] It can be understood that under the constraint of the pressure plate 33, the compression spring is always in a compressed state. When the pressure plate 33 moves downward, the compression spring further deforms to store elastic potential energy. When the pressure plate 33 moves upward, the compression spring restores its deformation to drive the mounting bracket 22 to rotate. In this way, the elastic deformation of the compression spring itself can provide driving force for the reverse rotation of the mounting bracket 22, and the structure is simple.

[0056] Furthermore, in order to prevent the compression spring from bending when deformed and to provide a stable restoring force, in this embodiment, the driving mechanism 3 further includes a guide post 39 provided on the seat body 11, the guide post 39 extends in the up-down direction, and the compression spring is sleeved on the periphery of the guide post 39. In this way, the guide post 39 can constrain the compression spring so that it can always deform in the up-down direction.

[0057] Furthermore, in this embodiment, the pressure plate 33 is provided with a through hole extending in the up-down direction, the guide column 39 is passed through the through hole, and a limiting portion 391 is provided on the top of the guide column 39, and the limiting portion 391 is exposed in the through hole. In this way, the guide column 39 guides the compression spring, and the limiting portion 391 can also limit the pressure plate 33 when it moves upward.

[0058] Furthermore, in this embodiment, the lens further includes a control device, and the control device is electrically connected to the driving mechanism 3 and is used to control the operation of the driving mechanism 3, specifically, to control the operation of the stepping motor.

[0059] For ease of understanding, a specific control method of the control device is described below.

[0060] Due to different monitoring scenarios, the monitoring scenarios include face recognition scenarios, license plate recognition scenarios, non-motor vehicle recognition scenarios, vehicle logo recognition scenarios, etc. In different monitoring scenarios, the installation height of the target monitoring device is generally different. In addition, the height of the monitored object in different monitoring scenarios is also different. For example, the height of the monitored object in the face recognition scenario is generally the average height of a person, and the height of the monitored object in the license plate recognition scenario is generally the average height of the license plate from the ground. For the current monitoring scene, the electronic device can obtain the installation height of the target monitoring device and the height of the monitored object. In addition, for different monitoring scenarios, the horizontal monitoring distance can be preset. The horizontal monitoring distance is the horizontal distance between the target monitoring device and the monitored object when the target monitoring device captures the monitored object. The electronic device can determine the horizontal monitoring distance in the current monitoring scene. According to the installation height of the target monitoring device, the height of the monitored object and the preset horizontal monitoring distance, the electronic device can determine the focus object distance between the monitored object and the target monitoring device and the angle between the object plane and the optical axis. Specifically, the difference between the installation height of the target monitoring device and the height of the monitored object is determined, and based on the difference and the preset horizontal monitoring distance, the focus object distance between the monitored object and the target monitoring device and the angle between the object plane and the optical axis are determined using trigonometric functions.

[0061] Specifically, the installation height of the monitoring device, the preset horizontal monitoring distance and the height of the monitored object can be input, and the focus distance and the angle between the object plane and the optical axis can be output. The required focal length is determined based on the preset number of recognition pixels, the pixel size of the imaging chip in the target monitoring device, the focus object distance and the width of the monitored object. The field of view of the target monitoring device is determined based on the required focal length, the resolution and pixel size of the imaging chip. The tilt angle of the image plane in the target monitoring device is determined based on the angle between the object plane and the optical axis, the required focal length and the focus object distance.

[0062] In this way, the control device controls the rotation angle of the stepper motor according to the tilt angle of the image plane, the corresponding calculated height to be raised or lowered by the first end of the mounting bracket 22, and the ratio of the transmission torque between the transmission wheel groups.

[0063] The present invention also provides an imaging device, which includes a monitoring device, or a camera, etc. The imaging device includes the above-mentioned lens. Since the imaging device includes the lens, the specific structure of the lens refers to the above-mentioned embodiment. Since the lens of the imaging device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lens, characterized in that: include: A lens body having an object side end and an image side end which are arranged opposite to each other, and an optical axis is formed in the lens body; An imaging structure, disposed at the image side end of the lens body, the imaging structure is rotatably disposed, and the imaging structure includes an image plane; and The driving mechanism is used to drive the imaging structure to rotate so as to adjust the angle between the image plane and the optical axis.

2. The lens according to claim 1, wherein: The lens body comprises a seat body; The imaging structure comprises a mounting bracket, the image plane is mounted on the mounting bracket, the mounting bracket comprises a rotating shaft extending in the longitudinal direction, the mounting bracket is rotatably mounted on the base body via the rotating shaft, and the mounting bracket comprises a first end and a second end which are arranged opposite to each other in the transverse direction; The driving mechanism is arranged laterally apart from the rotating shaft, and is used to drive the first end of the mounting bracket to move in an up-and-down direction, so as to drive the imaging structure to rotate when the first end of the mounting bracket rotates around the rotating shaft.

3. The lens according to claim 2, characterized in that: The driving mechanism comprises: The screw rod extends in the up-down direction and is rotatably arranged around its axis; A driving nut is sleeved on the outer periphery of the screw rod and is driven by the screw rod to move in an up-and-down direction when the screw rod rotates; A pressure plate is located above the mounting bracket, the pressure plate is fixedly connected to the driving nut, so as to be driven by the driving nut to move in an up-and-down direction, and to press against the first end of the mounting bracket to move downward in a downward movement stroke; and The reset member is used to provide a reset force when the first end of the mounting bracket moves upward.

4. The lens according to claim 3, characterized in that: The driving mechanism further comprises: A driving device, comprising an output shaft extending in an up-down direction, wherein a driving gear is disposed at an end of the output shaft; A driven gear is coaxially connected to the lead screw; and A transmission gear set is connected to the driving gear and the drive gear, and is used for the driving gear to drive the driven gear to drive the screw to rotate when the output shaft drives the driving gear to rotate.

5. The lens according to claim 3, characterized in that: The bottom of the pressing plate is provided with an abutment portion, and when the first end of the mounting bracket rotates around the rotating shaft, the abutment portion abuts against the first end of the mounting bracket, and the surface of the abutment portion is configured as an arc surface.

6. The lens according to claim 3, characterized in that: The mounting bracket is located above the seat body; The reset member comprises a compression spring, and the compression spring is arranged between the first end of the mounting bracket and the seat body.

7. The lens according to claim 6, characterized in that: The driving mechanism further comprises a guide column arranged on the seat body, the guide column extends in an up-down direction, and the compression spring is sleeved on the periphery of the guide column.

8. The lens according to claim 7, wherein: The pressing plate is penetrated by a through hole extending in the up-down direction, the guide column is passed through the through hole, a limiting portion is arranged on the top of the guide column, and the limiting portion is exposed in the through hole.

9. The lens according to claim 1, wherein: The lens also includes a control device, which is electrically connected to the driving mechanism and is used to control the operation of the driving mechanism.

10. An imaging device, characterized in that: Comprising the lens as claimed in any one of claims 1 to 9.

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