CN114430451B - External polarizer component and camera device - Google Patents

External polarizer component and camera device Download PDF

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Publication number
CN114430451B
CN114430451B CN202210004015.XA CN202210004015A CN114430451B CN 114430451 B CN114430451 B CN 114430451B CN 202210004015 A CN202210004015 A CN 202210004015A CN 114430451 B CN114430451 B CN 114430451B
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CN
China
Prior art keywords
polarizer
rotating shaft
rotating
assembly
bracket
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Application number
CN202210004015.XA
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Chinese (zh)
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CN114430451A (en
Inventor
袁永达
牛晓芳
李继猛
贺文星
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Zhejiang Dahua Technology Co Ltd
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Zhejiang Dahua Technology Co Ltd
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Priority to CN202210004015.XA priority Critical patent/CN114430451B/en
Publication of CN114430451A publication Critical patent/CN114430451A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/281—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for attenuating light intensity, e.g. comprising rotatable polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components

Abstract

The invention discloses an external polaroid assembly and a camera device. The polarizer is fixedly arranged on the rotary bracket. The fixing seat comprises a rotating shaft, and the extending direction of the rotating shaft is perpendicular to the polaroid. The rotating bracket is mounted on the rotating shaft. The first driving component drives the rotating bracket to rotate relative to the rotating shaft. Above-mentioned external polarizer subassembly and camera device can be adjusted the rotation angle of polarizer, prevents to take a candid photograph the traffic lights area and take place the phenomenon of overexposure in the image.

Description

External polarizer component and camera device
Technical Field
The invention relates to the technical field of optical equipment, in particular to an external polaroid assembly and a camera device.
Background
At present, in the intelligent traffic field, traffic electric police cameras are mainly used for capturing illegal actions of motor vehicles, such as running red light of motor vehicles, and the like. In the actual use process, as the brightness of the traffic light is higher than the ambient brightness, the electric police camera can generate clear captured vehicle images when capturing images, but the traffic light in the captured images can generate overexposure.
Disclosure of Invention
The embodiment of the invention aims to provide an external polaroid assembly and a camera device, so as to reduce the occurrence of local overexposure phenomenon in an image when a camera shoots.
The embodiment of the invention provides an external polaroid assembly which comprises a fixed seat, a rotating bracket, a first driving assembly and a polaroid. The polaroid is fixedly arranged on the rotary bracket. The fixing seat comprises a rotating shaft, and the extending direction of the rotating shaft is perpendicular to the polaroid. The rotating bracket is mounted on the rotating shaft. The first driving component drives the rotating bracket to rotate relative to the rotating shaft.
In the above embodiment, the external polarizer assembly may be mounted to a camera in which an internal polarizer is mounted. The external polaroid assembly can adjust the rotation angle of the polaroid, so that the included angle between the polarization direction of the incident light passing through the polaroid and the polarization direction of the incident light passing through the internal polaroid is adjusted, and the intensity of the incident light is adjusted. The external polarizer component can inhibit the overexposure of partial areas when the camera shoots. The external polaroid assembly is assembled with the traffic electric police camera, so that the phenomenon of overexposure of traffic lights in the snap-shot images can be inhibited. The first drive assembly may be controlled by software. According to the overexposure condition of the traffic lights in the image, the first driving component is controlled to adjust the rotation angle of the polaroid, so that the intensity of incident light is accurately adjusted.
In an alternative technical scheme, the rotary support is provided with a rotary shaft hole, the rotary shaft hole is sleeved on the rotary shaft, the rotary support comprises driven teeth, and the driven teeth are distributed along the center of the rotary shaft hole. The first driving assembly comprises driving teeth, wherein the driving teeth are meshed with the driven teeth and drive the rotating bracket to rotate relative to the rotating shaft. The first driving component is compact in structure, so that the volume of the external polaroid component is smaller.
In an optional technical scheme, the fixing seat can comprise a limiting column, the axial extending direction of the limiting column is parallel to the extending direction of the rotating shaft, the rotating support is provided with a limiting groove, the limiting column is inserted into the limiting groove, and the limiting groove is used for limiting the rotating angle of the rotating support. In the rotating process of the rotating bracket, the limiting column and the limiting groove play a role in limiting the rotating angle of the rotating bracket, so that the rotating angle of the rotating bracket is prevented from being too large and colliding with other surrounding components.
In optional technical scheme, above-mentioned spacing groove includes first spacing groove and second spacing groove, and first spacing groove and second spacing groove set up along rotatory shaft hole symmetry, and spacing post includes first spacing post and second spacing post, and first spacing post inserts first spacing groove, and second spacing post inserts the second spacing groove. The first limit groove and the second limit groove are symmetrically arranged, so that the stress of the rotating bracket is even, and the rotating bracket is stable in the rotating process.
In an alternative technical solution, the fixing base may include a base, a lifting bracket and a second driving assembly. The lifting support is slidably mounted on the base, and the second driving assembly drives the lifting support to lift along the first direction. The base comprises a bottom plate and side plates, and the side plates are arranged on the bottom plate. The first direction is perpendicular to the extending direction of the rotation shaft, and the first direction is perpendicular to the bottom plate. The rotation axis is located the lifting support. The lifting support drives the rotating support to slide along the first direction, so that the position of the polaroid in the first direction is adjusted. The polarizer is made to block only the overexposed region, thereby suppressing the overexposure of the image.
In an optional technical scheme, the second driving assembly comprises a second motor and a rack, the rack is slidably mounted on one side of the base, facing the lifting support, the second motor is fixedly mounted on the base, the second motor drives the rack to slide along a second direction, and the second direction is perpendicular to the first direction. The rack comprises a guide surface, the guide surface is arranged on one side of the rack, which is away from the base, the guide surface and the second direction are provided with acute angle included angles, and the lifting support is propped against the guide surface and slides along the guide surface. The second motor and the rack are compact in structure, and the whole volume of the external polaroid assembly can be reduced.
In an alternative technical scheme, the base can comprise a reset piece, and the reset piece is arranged between the base and the lifting support and used for driving the lifting support to be close to the base so as to reset the lifting support.
The embodiment of the invention also provides a camera device which comprises a camera and the external polaroid assembly. The camera includes a built-in polarizer mounted to the camera. The light passes through the polaroid and then the built-in polaroid and finally enters the sensor of the camera. The external polaroid component is used for adjusting the included angle between the polarization direction of the incident light passing through the polaroid and the polarization direction of the incident light passing through the internal polaroid. The external polaroid component reduces the light intensity of the overexposed area in the image when the camera shoots, and inhibits overexposure.
In an optional technical scheme, the camera further comprises a lens, the lens is arranged between the built-in polaroid and the polaroid component, the built-in polaroid is coaxially arranged with the lens, and the polaroid is parallel to the built-in polaroid. The polarizer is positioned in an orthographic projection of a plane of the built-in polarizer and at least partially overlaps the built-in polarizer. According to Malus's law, adjust the contained angle between the polarization direction of polarizer and the polarization direction of built-in polarizer, can adjust light intensity. And the size of the overlapping area of the polaroid and the built-in polaroid is adjusted according to the area where the traffic light is located, so that the light of the traffic light part in the snap-shot image is weaker, and overexposure is prevented. The light rays in other areas are stronger, so that the whole image is displayed clearly.
In an alternative embodiment, the camera device may further include a protective cover, and the camera and the external polarizer assembly are mounted to the protective cover. The protection cover can prevent wind, rain, impact and the like, and can protect the camera and the external polaroid assembly from being damaged.
Drawings
FIG. 1 is a schematic diagram of an external polarizer assembly according to an embodiment of the present invention;
FIG. 2 is a block diagram of a rotating bracket in one embodiment of the invention;
FIG. 3 is an exploded view of an external polarizer assembly in one embodiment of the present invention;
FIG. 4a is a top view of an external polarizer assembly in an embodiment of the present invention;
FIG. 4b is a cross-sectional view A-A of FIG. 4 a;
FIG. 5 is a block diagram of a rack in one embodiment of the invention;
FIG. 6 is a block diagram of a base in one embodiment of the invention;
FIG. 7 is a block diagram of a lifting support in one embodiment of the invention;
FIG. 8 is a block diagram of a camera device in one embodiment of the invention;
fig. 9 is a cross-sectional view of a camera device in one embodiment of the invention.
Reference numerals:
100-an external polarizer assembly; 200-camera; 1-a fixed seat; 2-rotating a bracket; 3-a first drive assembly; 4-polarizer; 5-rotating shaft; 6-limiting columns; 21-a rotation shaft hole; 22-driven teeth; 23-a limit groove; 31-a first motor; 32-driving teeth; 231-a first limit groove; 232-a second limit groove; 61-a first limit column; 62-a second limit post; 11-a base; 12-lifting support; 7-a second drive assembly; m-a first direction; q-a second direction; an extending direction of the N-rotating shaft; 110-side plates; 111-a bottom plate; 71-a second motor; 72-rack; 73-a guide surface; 121-a guide block; 721-gear teeth; 112-a chute; 113-ball grooves; 114-balls; 10-resetting piece; 115-spring posts; 122-a bottom wall; 123-through holes; 124-top wall; 201-lens; 202-built-in polarizer; 203-a protective cover; 2031-a protective cover bottom wall; 2032-first side wall.
Detailed Description
In order to reduce the occurrence of local overexposure in the image when the camera takes a picture. Embodiments of the present invention provide an external polarizer assembly and a camera device. In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below by way of example with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of an external polarizer assembly according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides an external polarizer assembly 100. The external polarizer assembly 100 comprises a fixing base 1, a rotating bracket 2, a first driving assembly 3 and a polarizer 4, wherein: the first driving component 3 is arranged on the fixed seat 1, and the polaroid 4 is fixedly arranged on the rotating bracket 2. The fixing base 1 comprises a rotating shaft 5, the extending direction of the rotating shaft 5 is perpendicular to the polaroid 4, the rotating bracket 2 is arranged on the rotating shaft 5, and the first driving component 3 drives the rotating bracket 2 to rotate relative to the rotating shaft 5.
In the above embodiments, the external polarizer assembly 100 may be mounted to a camera in which an internal polarizer is mounted. The external polarizer assembly 100 can suppress overexposure of a portion of the area when the camera is taking a picture. According to Malus's law, after passing through the polarizer, the light becomes linearly polarized light (assuming that the light intensity is I (0)), and the linearly polarized light passes through the lens, then passes through the built-in polarizer of the camera (assuming that the light intensity is I), and finally entersInto the camera sensor, the linearly polarized light intensity is i=i (0) cos 2 θ. θ is the angle between the polarization direction of the incident light passing through the polarizer 4 and the polarization direction of the incident light passing through the built-in polarizer. The external polarizer assembly 100 is capable of adjusting the angle at which the polarizer 4 rotates, thereby adjusting the angle between the polarization direction of light passing through the polarizer and the polarization direction of light passing through the internal polarizer. When the included angle θ=0°, the light intensity i=i (0) cos 2 θ=1, where the light is strongest. When the angle θ increases from 0 ° to 90 °, i=i (0) cos 2 θ decreases from 1 to 0, and the light also changes from strongest to weakest.
The external polaroid assembly 100 can also be applied to the field of intelligent transportation, the external polaroid assembly 100 is assembled with a traffic electric police camera to take a candid photograph of a violation vehicle, and the aim of inhibiting overexposure of traffic lights in a candid photograph image can be achieved. The external polarizer assembly 100 is of a modular design and is compact.
In a specific embodiment, the rotating shaft 5 may be provided with a mounting hole (not shown in the drawings). After the rotating bracket 2 is mounted on the rotating shaft 5, the screw is mounted on the mounting hole, so that the rotating bracket 2 is fixed along the extending direction of the rotating shaft 5, and the rotating bracket 2 is prevented from falling. The polarizer 4 may be fixedly coupled to the rotating bracket 2 by screws or by gluing. In the specific preparation of the rotating bracket 2, the rotating bracket 2 may be provided with a polarizer mounting groove 20, and the polarizer 4 may be mounted in the polarizer mounting groove 20, so that the rotating bracket 2 is compact.
Fig. 2 is a structural view of a rotating bracket in one embodiment of the present invention. Referring to fig. 1 and 2, in an alternative embodiment, the rotating bracket 2 may have a rotating shaft hole 21, and the rotating shaft hole 21 is sleeved on the rotating shaft 5. The above-described rotary bracket 2 includes driven teeth 22, and the driven teeth 22 are arranged along the center of the rotary shaft hole 21. The first drive assembly 3 includes a first motor 31 and drive teeth 32, the drive teeth 32 being engaged with the driven teeth 22. The first motor 31 drives the rotating bracket 2 to rotate relative to the rotating shaft 5 through the driving teeth 32, so as to adjust the angle of the polarizer 4. The first driving assembly 3 is compact, so that the volume of the external polarizer assembly 100 is small.
Fig. 3 is an exploded view of an external polarizer assembly in one embodiment of the present invention. Referring to fig. 2 and 3, in an alternative embodiment, the fixing base 1 includes a limiting post 6, and an axial extending direction of the limiting post 6 is parallel to the rotation axis 5. The rotating bracket 2 is provided with a limit groove 23, and the limit post 6 is inserted into the limit groove 23 and is in sliding connection with the limit groove 23. In the rotating process of the rotating bracket 2, the limiting column 6 and the limiting groove 23 play a role in limiting the rotating angle of the rotating bracket 2, and prevent the rotating bracket 2 from being excessively large in rotating angle and colliding with other surrounding components. The limiting groove 23 is an arc groove, and the circle center corresponding to the arc groove is concentric with the rotating shaft hole.
With continued reference to fig. 2 and fig. 3, in a specific embodiment, the rotating bracket 2 has a rotating shaft hole 21. The above-mentioned limit groove 23 includes a first limit groove 231 and a second limit groove 232, and the first limit groove 231 and the second limit groove 232 are symmetrically disposed along the rotation shaft hole 21. The above-mentioned spacing post 6 includes a first spacing post 61 and a second spacing post 62, the first spacing post 61 is inserted into the first spacing groove 231, and the second spacing post 62 is inserted into the second spacing groove 232. The first limit groove 231 and the second limit groove 232 are symmetrically arranged, so that the stress of the rotating bracket 2 is even, and the rotating bracket is stable in the rotating process.
Fig. 4a is a top view of an external polarizer assembly in one embodiment of the present invention, and fig. 4b is a cross-sectional view A-A of fig. 4 a. Referring to fig. 1, 3, 4a and 4b, in an alternative embodiment, the fixing base 1 may include a base 11, a lifting bracket 12 and a second driving assembly 7. The lifting bracket 12 is slidably mounted on the base 11. The second driving assembly 7 drives the lifting bracket 12 to slide along the first direction M. The base includes a bottom plate 111 and a side plate 110, the side plate 110 is mounted on the bottom plate 111, and the first direction M is perpendicular to the extending direction N of the rotation shaft 5. And the first direction M is perpendicular to the bottom plate 111 of the base 11. In an embodiment of the present application, the first direction M is a vertical direction. The rotation shaft 5 is located at the lifting bracket 12. The rotating bracket 2 is mounted on the lifting bracket 12, and the lifting bracket 12 drives the rotating bracket 2 to slide along the first direction M, so as to adjust the position of the polarizer 4 in the first direction M. The external polarizer assembly can be mounted on a camera, and the overexposure area is shielded by adjusting the position of the polarizer 4 in the first direction M. The external polarizer assembly 100 described above may also be assembled with a traffic police camera. Because only the area of traffic lights in the snap-shot vehicle violation image is overexposed, other areas in the image are clearly displayed. Therefore, the polaroid 4 is only required to shade the snapshot area where the traffic light is. The position of the polarizer 4 in the first direction M can thus be adjusted according to the position of the traffic light, so that the polarizer 4 covers the traffic light area.
Fig. 5 is a block diagram of a rack in one embodiment of the invention. Referring to fig. 4a, 4b and 5, in an alternative embodiment, the second drive assembly 7 may comprise a second motor 71, a drive gear (not shown) and a rack 72. The rack 72 is slidably mounted on a side of the base 11 facing the lifting frame 12, the second motor 71 is fixedly mounted on the base 11, and the second motor 71 drives the rack 72 to slide along a second direction Q, which is perpendicular to the first direction M. The rack 72 includes drive teeth 721, and the drive teeth 721 mesh with a drive gear. The second motor 71 drives the rack 72 to slide by a drive gear. In the embodiment of the present application, the second direction Q is a horizontal direction. The rack 72 includes a guiding surface 73, the guiding surface 73 is disposed on a side of the rack 72 facing away from the base 11, the guiding surface 73 forms an acute angle with the second direction Q, and the lifting bracket 12 abuts against the guiding surface 73 and slides along the guiding surface 73. In an alternative embodiment, the lifting bracket 12 has a guide block 121, and the guide block 121 abuts against the guide surface 73 and slides along the guide surface 73. The second motor 71 and the rack 72 are compact, and the overall size of the external polarizer assembly 100 can be reduced.
In a specific embodiment, in the initial position, the guide block 121 is located at the lowest end of the guide surface 73. When the second motor 71 drives the rack 72 to slide rightward in the second direction Q, the guide surface 73 moves rightward with it, and the guide block 121 slides from the lowest end of the guide surface 73 to the highest end of the guide surface 73. Thereby moving the lifting bracket 12 upward in the first direction M. When the second motor 71 drives the rack 72 to slide in the opposite direction, the guide surface 73 moves leftward at any time, and the guide block 121 slides from the highest end of the guide surface 73 to the lowest end of the guide surface 73. Thereby moving the lifting bracket 12 downward.
In the concrete preparation of the rack 72, the number of the guide surfaces 73 may be two, and the acute angles between the two guide surfaces 73 and the second direction Q may be the same. So that the lifting bracket 12 is stressed evenly when sliding along the first direction M, thereby making the sliding smoother.
In an alternative embodiment, the second driving assembly 7 may also include a lifting mechanism or a sliding rail mechanism, so long as the lifting bracket 12 can slide along the first direction M relative to the base 11, which is not limited in this application.
Fig. 6 is a block diagram of a base in one embodiment of the invention. Referring to fig. 4b and 6, in preparing the base 11 specifically, a slide groove 112 may be provided on the bottom plate 111, and the rack 72 may be mounted on the slide groove 112, and the slide groove 112 may serve as a guide for the rack 72. Further, a plurality of ball grooves 113 may be provided in the slide groove 112, and a ball 114 may be provided in each ball groove 113. The rack 72 is in rolling connection with the balls 114, so that the rack 72 can slide in the sliding groove 112 more smoothly, thereby reducing the running resistance of the second motor 71.
Fig. 7 is a structural view of a lifting bracket in an embodiment of the present invention. Referring to fig. 4b, 6 and 7, in an alternative embodiment, the base 11 may further include a reset element 10. The resetting piece 10 is installed between the base 11 and the lifting bracket 12, and is used for driving the lifting bracket 12 to approach the base 11. The lifting bracket 12 is far away from the base 11 under the driving force of the guide surface 73. The reset member 10 can apply a downward driving force to the lifting bracket 12 to pull the lifting bracket 12 back toward the base 11, thereby resetting the same.
Referring to fig. 3, 4b, 6 and 7, in selecting the restoring member 10 specifically, a spring may be used as the restoring member. A spring post 115 is provided on the bottom plate 111 of the base 11. The lifting bracket 12 has a bottom wall 122, and a through hole 123 is provided in the bottom wall 122. The through hole 123 is sleeved on the spring post 115, the reset element 10 is sleeved on the outer wall of the spring post 115, and finally the reset element 10 is fixed on the spring post 115 by using a screw, so that the reset element 10 is clamped between the bottom wall 122 of the lifting bracket 12 and the head of the screw, that is, one end of the reset element 10 is propped against the bottom wall 122 of the lifting bracket 12, and the other end is propped against the head of the screw. When the lifting bracket 12 is lifted in the first direction M, the bottom wall 122 presses the reset device 10 against the screw head. When the lifting bracket 12 descends in the first direction M, the reset device 10 is released. When the reset member 10 is compressed, a reaction force is applied to the lifting bracket 12, so that the lifting bracket 12 tends to move downward, and the lifting bracket 12 is forced to reset. Alternatively, one end of the restoring member 10 may be fixed to the top wall 124 of the lifting frame 12, and the other end may be fixed to the bottom plate 111 of the base 11. When the lifting bracket 12 slides upwards, the reset element 10 is stretched, and the downward pulling force of the lifting bracket 12 forces the reset element to reset. The restoring member 10 may be an elastic piece, a lever, or the like, in addition to the spring, and is not particularly limited in this application.
Fig. 8 is a block diagram of a camera device in an embodiment of the present invention. As shown in fig. 8, an embodiment of the present invention further provides a camera apparatus including a camera 200 and the above-mentioned external polarizer assembly 100, the camera 200 including an internal polarizer 202, the internal polarizer 202 being mounted to the camera. The incident light passes through the polarizer 4 and then through the built-in polarizer 202 to finally strike the camera's sensor. The external polarizer assembly 100 is used to adjust the angle between the polarization direction of incident light entering the camera 200 through the polarizer 4 and the polarization direction through the internal polarizer 202. The external polarizer assembly 100 described above suppresses overexposure of the camera 200 when taking a picture. In an alternative embodiment, the external polarizer assembly 100 makes the light intensity of the traffic light area in the captured image low when the camera 200 captures a vehicle violation, thereby avoiding overexposure.
Fig. 9 is a cross-sectional view of a camera device in one embodiment of the invention. Referring to fig. 8 and 9, in an alternative embodiment, the camera 200 includes a lens 201 and a built-in polarizer 202, the lens 201 is disposed between the built-in polarizer 202 and the polarizer assembly 100, the built-in polarizer 202 is disposed coaxially with the lens 201, and the polarizer 4 is parallel to the built-in polarizer 202. The front projection of the polarizer 4 on the plane of the built-in polarizer 202 at least partially overlaps the built-in polarizer 202.
In one embodiment, in the initial state of the external polarizer assembly 100, the angle θ=0° between the polarization direction of the incident light passing through the polarizer 4 and the polarization direction passing through the internal polarizer 202. When it is desired to attenuate the intensity of light in a region of the image captured by the camera 200, such as a traffic light region in the image. The first motor 31 drives the driving teeth 32 to drive the rotating bracket 2 to rotate the polarizer 4 relative to the rotation axis 5, and θ increases from 0 ° to be cos according to the formula i=i (0) 2 θ, I decreases from 1, so that the light intensity also gradually decreases until the light intensity decreases to make the snap image clear, and the first motor 31 stops operating.
Because the traffic light is high, it is generally located at the top of the captured image, and the vehicle being captured is located at the middle and lower part of the image. And the angles of view of the different camera lenses are different. The relative distance between the polaroid 4 and the built-in polaroid 202 in the first direction M is adjusted through the second driving assembly 7, so that the overlapping area of the polaroid 4 and the built-in polaroid 202 can cover the traffic light snapshot area, the overlapping area can be as small as possible, and the influence on the definition of other areas can be avoided as long as the traffic light snapshot area can be covered. When the coverage area is too large, the second driving component 7 drives the rack 72 to move rightward along the second direction Q, the guide surface 73 will give upward driving force to the guide block 121 of the lifting bracket 12, and at this time, the lifting bracket 12 drives the polarizer 4 to move upward, so as to reduce the overlapping area between the polarizer 4 and the built-in polarizer 202. When the overlapping area is too small to cover the traffic light snapshot area, the second motor 71 rotates in the opposite direction to drive the rack 72 to move leftwards, and the guide block 121 slides downwards along the guide 73, so that the lifting support 12 drives the polaroid 4 to move downwards, and the overlapping area is enlarged to cover the traffic light snapshot area. The light of the traffic light area in the snap image is weaker, and the exposure is inhibited. The light rays in other areas are strong, so that the whole snap-shot image is clearly displayed.
With continued reference to fig. 9, in an alternative embodiment, the camera apparatus further includes a protective cover 203, and the camera 200 and the external polarizer assembly are mounted to the protective cover 203. In one embodiment, the protective cover may include a first sidewall 2032 and a protective cover bottom wall 2031, the camera 200 is fixedly mounted to the protective cover bottom wall 2031, and the external polarizer assembly 100 is mounted to the first sidewall 2032. The protective cover 203 can prevent wind, rain, impact, etc., and can protect the camera 200 and the external polarizer assembly 100 from being damaged.
A user can replace the model of the camera 200 according to the need, and can assemble the external polarizer assembly 100 with cameras 200 of different models to meet different shooting requirements. The external polarizer assembly 100 and the camera device are in a modularized design, so that the structure is compact, and the maintenance of the camera 200 in the later period is facilitated.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and for simplification of the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (9)

1. An external polarizer subassembly, its characterized in that includes fixing base, runing rest, first drive assembly and polarizer, wherein:
the polarizing plate is fixedly arranged on the rotating bracket, the fixing seat comprises a rotating shaft, the extending direction of the rotating shaft is perpendicular to the polarizing plate, the rotating bracket is arranged on the rotating shaft, and the first driving assembly drives the rotating bracket to rotate relative to the rotating shaft;
the fixed seat comprises a base, a lifting bracket and a second driving assembly, the lifting bracket is mounted on the base, the second driving assembly drives the lifting bracket to lift along a first direction, and the first direction is perpendicular to the extending direction of the rotating shaft; the base comprises a bottom plate and side plates, the side plates are arranged on the bottom plate, the first direction is perpendicular to the bottom plate, and the rotating shaft is positioned on the lifting bracket;
the second driving assembly comprises a rack, the rack comprises a guide surface, the guide surface is arranged on one side, deviating from the base, of the rack, an acute angle is formed between the guide surface and the second direction, the second direction is perpendicular to the first direction, and the lifting support abuts against the guide surface and slides along the guide surface.
2. The external polarizer assembly of claim 1, wherein the rotating mount has a rotating shaft hole, the rotating shaft hole is sleeved on the rotating shaft, the rotating mount comprises driven teeth, the driven teeth are arranged along the center of the rotating shaft hole, and the first driving assembly comprises driving teeth, and the driving teeth are meshed with the driven teeth and drive the rotating mount to rotate relative to the rotating shaft.
3. The external polarizer assembly of claim 1, wherein the fixing base comprises a limit post, an extending direction of the limit post is parallel to an extending direction of the rotating shaft, the rotating bracket is provided with a limit groove, the limit post is inserted into the limit groove, and the limit groove is used for limiting a rotating angle of the rotating bracket.
4. The external polarizer assembly of claim 3, wherein the rotating bracket has a rotating shaft hole, the rotating shaft hole being sleeved on the rotating shaft;
the limiting groove comprises a first limiting groove and a second limiting groove, the first limiting groove and the second limiting groove are symmetrically arranged along the rotating shaft hole, the limiting column comprises a first limiting column and a second limiting column, the first limiting column is inserted into the first limiting groove, and the second limiting column is inserted into the second limiting groove.
5. The external polarizer assembly of claim 1, wherein the second driving assembly comprises a second motor, the rack is slidably mounted on a side of the base facing the lifting bracket, the second motor is fixedly mounted on the base, and the second motor drives the rack to slide in a second direction.
6. An external polarizer assembly as recited in claim 5, wherein the base includes a reset member mounted between the base and the lifting bracket for driving the lifting bracket adjacent the base.
7. A camera device comprising a camera and an external polarizer assembly according to any one of claims 1 to 6, the camera comprising an internal polarizer mounted to the camera; the external polaroid component is used for adjusting an included angle between the polarization direction of incident light passing through the polaroid and the polarization direction of incident light passing through the internal polaroid.
8. The camera device of claim 7, wherein the camera comprises a lens disposed between the built-in polarizer and the polarizer assembly, the built-in polarizer being disposed coaxially with the lens, the polarizer being parallel to the built-in polarizer;
the polarizer is positioned in the orthographic projection of the plane of the built-in polarizer and at least partially overlaps the built-in polarizer.
9. The camera device of claim 8, further comprising a protective cover, wherein the camera and the external polarizer assembly are mounted to the protective cover.
CN202210004015.XA 2022-01-05 2022-01-05 External polarizer component and camera device Active CN114430451B (en)

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CN201335901Y (en) * 2008-12-30 2009-10-28 中国工程物理研究院激光聚变研究中心 Polaroid adjusting bracket
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