Dimming component and image acquisition equipment

Abstract

The utility model relates to the technical field of electronic equipment, and discloses a dimming component and image acquisition equipment. The dimming component comprises a plurality of polaroids and a driving assembly. The plurality of polaroids are arranged at the front end of the camera along the axial direction of the camera; the polaroid is used for weakening light entering the camera. The driving assembly is connected with the plurality of polaroids, and the driving assembly is used for driving the polaroids to rotate around the axial direction of the camera, so that at least one polaroid covers the camera, or the polaroids do not cover the camera. By arranging the driving assembly, the driving assembly can be used for driving the polaroid to rotate, so that the camera is covered by at least one polaroid, and the purpose of reducing light is achieved. The driving assembly can drive the polaroid not to cover the camera, and at the moment, light directly enters the camera. In addition, the driving assembly can also drive the plurality of polaroids to cover the camera, and at the moment, the plurality of polaroids weaken the light step by step, that is, the light reduction amount can be adjusted by increasing or decreasing the number of the polaroids covering the camera.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic equipment technical field especially, relate to a light reduction component and image acquisition equipment. BACKGROUND

[0002] Image acquisition equipment, for example, high altitude parabolic camera, in the application process, the lens is often installed upward, is easy to be directly irradiated by sunlight or the reflection of glass wall, high intensity sunlight can be directly irradiated into the lens, on part lens or image sensor cmos, causes part lens burnout or cmos burnout. At the same time, the image of sky is often reflected by the glass wall building, so that the imaging is not clear.

[0003] At present, the light reduction mode of high altitude parabolic camera has the following several kinds. One, use sunshade to prevent sunlight direct irradiation, but this method is not perfect, along with more and more skyscrapers, the upward angle of high altitude parabolic camera is more and more, also more easily be directly irradiated by sunlight. At the same time, the sun changes constantly in the four seasons, cannot avoid sunlight direct irradiation by installation angle. Two, use fixed light reduction mirror to reduce sunlight. Fixed light reduction mirror cannot adjust light reduction amount, and also cannot solve the problem of glass wall reflection affecting imaging. Three, use variable aperture or fixed aperture to reduce light, but the light received by the front lens is still direct, still has the risk of lens thermal defocus.

[0004] How to adjust light reduction amount to prevent glass wall reflection is the problem that the industry urgently needs to solve. INVENTION CONTENTS

[0005] The utility model provides a light reduction component and image acquisition equipment to solve the defect that the light reduction mode in prior art cannot realize the adjustment of light reduction amount and cannot solve the problem of glass wall reflection.

[0006] The utility model provides a light reduction component in a first aspect, comprising:

[0007] A plurality of polaroids, a plurality of the polaroids are arranged in the front end of the camera along the axial direction of the camera, and the polaroids are used to weaken the light entering the camera.

[0008] A driving assembly is connected with the plurality of polaroids, and the driving assembly is used to drive the polaroids to rotate around the axial direction of the camera, so that at least one of the polaroids covers the camera, or none of the polaroids covers the camera.

[0009] According to the light reduction component provided by the utility model, when the polaroids just cover the camera, the polaroids have a rotation margin of not less than 90 degrees.

[0010] The utility model provides a light reduction component, a plurality of polarization pieces have same filter angle, when the polarization piece just covers the camera, the polarization piece has rotation allowance less than 90 DEG, and the sum of rotation allowance of a plurality of polarization pieces is not less than 90 DEG.

[0011] The utility model provides a light reduction component, including two polarization pieces, when the polarization piece just covers the camera, the polarization piece has 45 DEG rotation allowance.

[0012] The utility model provides a light reduction component, further include:

[0013] A plurality of limiting mechanisms, a plurality of limiting mechanisms and a plurality of polarization pieces one to one correspond, and the limiting mechanism and the corresponding polarization piece away from the one side of rotation center of itself slide fit.

[0014] The utility model provides a light reduction component, the drive assembly includes:

[0015] A plurality of first driving members, a plurality of first driving members and a plurality of polarization pieces one to one correspond, and the first driving member is connected with the corresponding polarization piece, and is used for driving the polarization piece rotation.

[0016] The utility model provides a light reduction component, the drive assembly includes:

[0017] Transmission connecting piece, with polarization piece detachable connection;

[0018] Driving mechanism, with transmission connecting piece connection, and the driving mechanism is used for driving transmission connecting piece along the axial movement of camera, to make transmission connecting piece with any one polarization piece connect;The driving mechanism is also used for driving transmission connecting piece around the axial rotation of camera, to make the polarization piece rotation.

[0019] The utility model provides a light reduction component, and the transmission connecting piece includes:

[0020] Housing, inside having accommodating cavity;

[0021] Lead screw, be located in accommodating cavity;The driving mechanism is located in the accommodating cavity outside, and is connected with the one end of lead screw, is used for driving lead screw rotation;The other end of lead screw extends along the axial of camera;

[0022] First connecting piece, the first connecting piece and lead screw screw thread cooperation, and the first connecting piece and polarization piece detachable connection, and the first connecting piece and the inside surface of housing circumferential limit;

[0023] A locking member abuts against or separates from the shell; when the locking member abuts against the shell, the driving mechanism drives the first connecting member to move along the axial direction of the camera through the lead screw; when the locking member separates from the shell, the driving mechanism drives the first connecting member and the shell to rotate synchronously through the lead screw.

[0024] According to the light reduction component, the transmission connecting member comprises a worm and a second connecting member; the second connecting member is installed on the worm and detachably connected with the polarizer; the driving mechanism comprises:

[0025] A second driving member, a driving end of the second driving member is connected with one end of the worm, and the second driving member is used for driving the worm to rotate;

[0026] A limiting member, the limiting member has a circumferential limiting portion and an axial limiting portion; the circumferential limiting portion is slidably connected with the second driving member along the axial direction of the camera; the axial limiting portion abuts against or separates from the second driving member;

[0027] A worm wheel member, the worm wheel member abuts against or separates from the side surface of the worm; when the worm wheel member abuts against the side surface of the worm, the second driving member drives the worm to rotate, so that the second driving member and the worm move along the axial direction of the camera; when the worm wheel member separates from the worm, the second driving member abuts against the axial limiting portion, and the second driving member drives the second connecting member to rotate through the worm, so that the polarizer is driven to rotate.

[0028] The utility model discloses a kind of image acquisition equipment, including camera, and the light reduction component of any one described above.

[0029] The light reduction component provided by the utility model, by setting the polarizer at the front end of the camera, when the polarizer covers the camera, the polarizer can not only weaken the light entering the camera, but also eliminate the reflection of smooth surface such as glass. By setting the driving assembly, at least one polarizer can be driven to rotate by the driving assembly to cover the camera, the light entering the camera is first polarized by the polarizer and weakened, achieving the purpose of light reduction. The driving assembly can also drive all polarizers not to cover the camera, at this time, the light entering the camera does not pass through the polarizer, but directly enters the camera, and the polarizer does not play a role in light reduction. At the same time, the driving assembly can also drive multiple polarizers to cover the camera, at this time, multiple polarizers achieve step-by-step weakening of light, that is, the number of polarizers covering the camera can be increased or decreased to adjust the light reduction amount. Therefore, the light reduction component of the utility model solves the defect that the light reduction method in the prior art cannot adjust the light reduction amount and cannot solve the problem of glass wall reflection.

[0030] The image acquisition device of the utility model has at least the above-mentioned advantages, and the details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0032] Figure 1 It is one of the structural schematic diagram of the image acquisition device provided by the utility model.

[0033] Figure 2 It is the second structural schematic diagram of the image acquisition device provided by the utility model.

[0034] Figure 3 It is the side view structural schematic diagram of Figure 2 .

[0035] Figure 4 It is the third structural schematic diagram of the image acquisition device provided by the utility model.

[0036] Figure 5 It is the fourth structural schematic diagram of the image acquisition device provided by the utility model.

[0037] Figure 6 It is the fifth structural schematic diagram of the image acquisition device provided by the utility model.

[0038] Figure 7 It is the sixth structural schematic diagram of the image acquisition device provided by the utility model.

[0039] Figure 8 It is the side view structural schematic diagram of Figure 7 .

[0040] Figure 9 It is one of the structural schematic diagram of the driving assembly of the image acquisition device provided by the utility model.

[0041] Figure 10 It is the second structural schematic diagram of the driving assembly of the image acquisition device provided by the utility model.

[0042] Reference signs:

[0043] 100, light reduction component;200, camera;300, shell;

[0044] 110, polaroid;

[0045] 120, driving assembly; 121, first driving member; 122, transmission connecting member; 123, driving mechanism; 124, gear set; 1221, shell; 1222, screw rod; 1223, first connecting member; 1224, locking member; 1225, worm; 1226, second connecting member; 1227, circumferential limiting member; 1228, mounting groove; 1231, second driving member; 1232, limiting member; 1233, worm gear member; 1234, circumferential limiting portion; 1235, axial limiting portion;

[0046] 130, limiting mechanism. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0048] In the description of the embodiments of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For the person skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0050] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature can be "above", "over" and "on" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature can be "under", "below" and "underneath" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0051] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0052] The following will be described in detail Figures 1 to 10 The structure and working principle of the light reduction component and the image acquisition device of the present application will be described in detail.

[0053] Before the light reduction component and the image acquisition device of the present application are described in detail, the theoretical basis of the light reduction component of the present application with light reduction function needs to be introduced. The theoretical basis is Malus' law. Malus' law means that when the angle between the linearly polarized light vector vibration direction and the light transmission axis direction of the analyzer is θ, the light intensity I transmitted through the analyzer satisfies the formula I = I0cos²θ. Wherein, I0 is the intensity of linearly polarized light, and θ is the angle between the light vibration direction of the incident linearly polarized light and the polarization direction of the polarizer.

[0054] As Figures 1 to 10 As shown in the figure, the embodiment of the present application provides a light reduction component 100. The light reduction component 100 comprises a plurality of polarizers 110 and a driving assembly 120. The plurality of polarizers 110 are arranged at the front end of the camera 200 along the axial direction of the camera 200; the polarizer 110 is used to weaken the light entering the camera 200. The driving assembly 120 is connected with the plurality of polarizers 110, and the driving assembly 120 is used to drive the polarizer 110 to rotate around the axial direction of the camera 200, so that at least one polarizer 110 covers the camera 200, or none of the polarizers 110 covers the camera 200.

[0055] In the embodiment, by arranging the polarizer 110 at the front end of the camera 200, when the polarizer 110 covers the camera 200, the polarizer 110 can not only weaken the light entering the camera 200, but also eliminate the reflection of the smooth surface such as glass. By arranging the driving assembly 120, the driving assembly 120 can be used to drive the polarizer 110 to rotate, so that at least one polarizer 110 covers the camera 200, the light entering the camera 200 is first polarized by the polarizer 110 and is weakened, and the purpose of light reduction is achieved. The driving assembly 120 can also drive the polarizer 110 not to cover the camera 200, at this time the light entering the camera 200 does not pass through the polarizer 110, but directly enters the camera 200, and the polarizer 110 does not play a role in light reduction. At the same time, the driving assembly 120 can also drive multiple polarizers 110 to cover the camera 200, at this time multiple polarizers 110 achieve step-by-step weakening of light, that is, the number of polarizers 110 covering the camera 200 can be increased or decreased to adjust the amount of light reduction. Therefore, the light reduction component of the embodiment solves the defect that the light reduction method in the prior art cannot adjust the amount of light reduction and cannot solve the problem of glass wall reflection.

[0056] It should be noted that the shape of the polarizer 110 is not limited in the specific embodiments of the utility model, as long as the polarizer 110 can cover the camera 200. For example, the polarizer 110 can be square, triangular, rectangular or fan-shaped.

[0057] Preferably, the polarizer 110 is fan-shaped, the radius of the fan-shaped is not less than the diameter of the camera 200, and the central angle of the fan-shaped is not less than 90°.

[0058] It can be understood that multiple means at least two. That is, in the specific embodiments of the utility model, the light reduction component 100 includes at least two polarizers 110.

[0059] In some embodiments, the light filtering angle of the polarizer 110 is 0-90°. That is, the light filtering angle of each polarizer 110 is 0-90°, which can ensure that the polarizer 110 filters light of any angle in the range of 0-90°, and expands the light reduction range.

[0060] The light filtering angle is the included angle between the light vibration direction of the incident linearly polarized light and the polarization direction of the polarizer.

[0061] As Figures 1 to 4As shown, further, when the polarizer 110 just covers the camera 200, the polarizer 110 has a rotation allowance of not less than 90°. Specifically, the polarizer 110 is a fan shape, and the central angle a of the part of the fan shape that is not covered by the polarizer 110 is not less than 90°, that is, the rotation allowance of the polarizer 110 is a, and a is not less than 90°. In this way, by one polarizer 110, light of any angle in the range of 0~90° can be filtered, and the light reduction range is expanded.

[0062] As shown in FIG. 1, the polarizer 110 is arranged in front of the camera 200, and the polarizer 110 is arranged to be rotatable around the camera 200. Figure 2 As shown, further, when the two polarizers 110 both just cover the camera 200, the filter angle β of the two polarizers 110 satisfies: 180°-a≤β≤a, so that the filter angle of the two polarizers 110 can be adjusted between 0~90°, and it is ensured that the polarizer 110 can filter light of any angle in the range of 0~90°, and the light reduction range is expanded.

[0063] In some embodiments, the filter angles of the plurality of polarizers 110 are the same; when the polarizer 110 just covers the camera 200, the polarizer 110 has a rotation allowance of less than 90°; and the sum of the rotation allowances of the plurality of polarizers 110 is not less than 90°. The plurality of polarizers 110 are used in cooperation, and it is ensured that the filter angle is 0~90°, and compared with the scheme in which the polarizer 110 has a rotation allowance of not less than 90°, the area of the polarizer 110 in this embodiment is smaller, and it is more cost-effective and space-saving, and it is conducive to the miniaturization design of the device.

[0064] As shown in FIG. 1, the polarizer 110 is arranged in front of the camera 200, and the polarizer 110 is arranged to be rotatable around the camera 200. Figure 5 and Figure 6 As shown, further, including two polarizers 110; when the polarizer 110 just covers the camera 200, the polarizer 110 has a rotation allowance of 45°. At this time, when the two polarizers 110 are used in cooperation, it is ensured that the filter angle is 0~90°, and compared with the scheme in which the polarizer 110 has a rotation allowance of not less than 90°, the area of the polarizer 110 in this embodiment is smaller, and it is more cost-effective and space-saving, and it is conducive to the miniaturization design of the device.

[0065] For example, two polarizers 110 with the same filter angle are arranged in front of the camera 200, the first polarizer 110 just covers the camera 200, and the first polarizer 110 has a rotation allowance of 30°, the second polarizer 110 just covers the camera 200, and the second polarizer 110 has a rotation allowance of 60°, and at this time, when the two polarizers 110 are used in cooperation, it is ensured that the filter angle is 0~90°.

[0066] As shown in FIG. 1, the polarizer 110 is arranged in front of the camera 200, and the polarizer 110 is arranged to be rotatable around the camera 200. Figure 7 and Figure 8As shown, in some embodiments, the light reduction component 100 further comprises a plurality of limiting mechanisms 130. The plurality of limiting mechanisms 130 correspond to the plurality of polarizers 110 one by one; the limiting mechanism 130 and the corresponding polarizer 110 slide fit on the side away from the rotation center of the polarizer 110 itself. By setting the limiting mechanism 130, the installation basis can be provided for the polarizer 110, and the motion stability of the polarizer 110 is improved.

[0067] For example, the limiting mechanism 130 comprises a first limiting groove, which can be formed on the inner side of the shell 300 of the image acquisition device, and the side of the polarizer 110 away from the rotation center of the polarizer 110 itself is located in the first limiting groove and slide fits with the first limiting groove. In other words, when the driving assembly 120 drives the polarizer 110 to rotate, the side of the polarizer 110 away from the rotation center of the polarizer 110 itself is located in the first limiting groove and rotates relative to the limiting groove.

[0068] For example, the limiting mechanism 130 comprises a second limiting groove and a limiting protrusion; one of the limiting protrusion and the second limiting groove is formed on the polarizer 110, and the other is formed on the inner side of the shell 300; the limiting protrusion and the second limiting groove slide fit.

[0069] As shown, Figures 1 to 6 In some embodiments, the driving assembly 120 comprises a plurality of first driving members 121; the plurality of first driving members 121 correspond to the plurality of polarizers 110 one by one, and the first driving member 121 is connected with the corresponding polarizer 110 for driving the polarizer 110 to rotate. By setting the plurality of first driving members 121, the individual driving of the plurality of polarizers 110 can be realized, the structure is simple, and the problem that the entire light reduction component 100 cannot be used due to the damage of one first driving member 121 is avoided.

[0070] Specifically, the first driving member 121 can be a rotary air cylinder or a motor. The mounting end of the rotary air cylinder or the mounting end of the motor can be mounted in the shell 300, and the driving end of the rotary air cylinder or the driving end of the motor is connected with the corresponding polarizer 110 for driving the corresponding polarizer 110 to rotate.

[0071] As shown, Figure 7 and Figure 8 Further, the driving assembly 120 further comprises a gear set 124; the first driving member 121 is connected with the polarizer 110 through the gear set 124. Specifically, the driving end of the rotary air cylinder or the driving end of the motor is connected with the polarizer 110 through the gear set 124, and the motion stability of the polarizer 110 is improved.

[0072] As shown, Figure 8As shown, further, the transmission connecting member 122 is connected to the polarizer 110 through the gear set 124. Exemplarily, the first connecting member 1223 is connected to the polarizer 110 through the gear set 124. Exemplarily, the second connecting member 1226 is connected to the polarizer 110 through the gear set 124.

[0073] like Figures 7 to 10 As shown, in some other embodiments, the drive assembly 120 includes a transmission connector 122 and a drive mechanism 123. The transmission connector 122 is detachably connected to the polarizer 110. The drive mechanism 123 is connected to the transmission connector 122 and is configured to drive the transmission connector 122 to move along the axial direction of the camera 200 so that the transmission connector 122 is connected to any polarizer 110. The drive mechanism 123 is also configured to drive the transmission connector 122 to rotate about the axial direction of the camera 200 so that the polarizer 110 rotates. Specifically, when the polarizer 110 detachably connected to the transmission connector 122 needs to be adjusted, the drive mechanism 123 drives the transmission connector 122 to move along the axial direction of the camera 200 until the transmission connector 122 is separated from the previous polarizer 110 and detachably connected to the next polarizer 110. At this point, the drive mechanism 123 stops driving the transmission connector 122 to continue moving along the axial direction of the camera 200 and instead drives the polarizer 110 to rotate via the transmission connector 122. In this way, different polarizers 110 can be driven by one driving mechanism 123 , which reduces the number of driving structures and saves space and cost.

[0074] like Figure 7 As shown, the transmission connector 122 is detachably connected to the polarizer 110 via a gear set 124. Specifically, the gear set 124 includes a first gear and a second gear; the central axes of the first gear and the second gear are parallel and both are parallel to the axial direction of the camera 200. The first gear is mounted on the transmission connector 122 and can move along the axial direction of the camera 200 and rotate with the transmission connector 122. The second gear is mounted on the polarizer 110 and meshes with the first gear. Therefore, the second gear rotates with the first gear, driving the polarizer 110 to rotate.

[0075] Preferably, the second gear and the polarizer 110 are integrally formed.

[0076] like Figure 9As shown, the transmission connector 122 exemplarily includes a housing 1221, a screw 1222, a first connector 1223, and a locking member 1224. The housing 1221 defines a housing cavity. The screw 1222 is located in the housing cavity. The drive mechanism 123 is located outside the housing cavity and is connected to one end of the screw 1222 for driving the screw 1222 to rotate. The other end of the screw 1222 extends axially along the camera 200. The first connector 1223 is threadedly engaged with the screw 1222 and is detachably connected to the polarizer 110. The first connector 1223 is circumferentially limited to the inner side surface of the housing 1221. The locking member 1224 abuts or separates from the housing 1221. When the locking member 1224 abuts the housing 1221, the drive mechanism 123 drives the first connecting member 1223 via the screw 1222 to move axially along the camera 200, thereby adjusting the polarizer 110 detachably connected to the first connecting member 1223. When the locking member 1224 separates from the housing 1221, the drive mechanism 123 drives the first connecting member 1223 and the housing 1221 to rotate synchronously via the screw 1222, thereby rotating the polarizer 110. Specifically, when the polarizer 110 connected to the first connecting member 1223 needs to be adjusted, the locking member 1224 abuts against the housing 1221, effectively securing the housing 1221 and preventing it from moving. The drive mechanism 123 rotates the screw rod 1222. Because the first connecting member 1223 is circumferentially limited by the inner side surface of the housing 1221, the first connecting member 1223 moves along the length of the screw rod 1222, that is, along the axial direction of the camera 200, until the first connecting member 1223 engages with the next polarizer 110. The locking member 1224 then separates from the housing 1221, and the drive mechanism 123 continues to rotate the screw rod 1222. At this point, the first connecting member 1223 remains stationary relative to the screw rod 1222 and rotates synchronously with it, driving the housing 1221 and the polarizer 110 to rotate synchronously.

[0077] like Figure 9 As shown, further, a circumferential limiting groove is formed on the inner side surface of the housing 1221 along the length direction of the screw rod 1222, and a circumferential limiting member 1227 is formed on the side surface of the first connecting member 1223. The circumferential limiting member 1227 is located in the circumferential limiting groove and slides with the circumferential limiting groove along the length direction of the screw rod 1222. When the first connecting member 1223 moves relative to the screw rod 1222 along the length direction of the screw rod 1222, the first connecting member 1223 drives the circumferential limiting member 1227 to slide along the circumferential limiting groove.

[0078] like Figure 9As shown, further, the locking member 1224 can be a clamping jaw mounted to the housing 300 of the image acquisition device for clamping or releasing the outer shell 1221. When the outer shell 1221 is clamped, the outer shell 1221 is fixed and cannot rotate with the lead screw 1222. When the outer shell 1221 is released, the outer shell 1221 can rotate synchronously with the lead screw 1222.

[0079] Further, the locking member 1224 is mounted to the housing 300 of the image acquisition device, and the outer shell 1221 has an installation groove 1228 on its outer side, and the locking member 1224 is detachably assembled with the installation groove 1228. When the locking member 1224 is mounted to the installation groove 1228, the locking member 1224 can limit the circumferential rotation of the outer shell 1221.

[0080] As shown, further, the locking member 1224 can be a clamping jaw mounted to the housing 300 of the image acquisition device for clamping or releasing the outer shell 1221. When the outer shell 1221 is clamped, the outer shell 1221 is fixed and cannot rotate with the lead screw 1222. When the outer shell 1221 is released, the outer shell 1221 can rotate synchronously with the lead screw 1222. Figure 10As shown, the exemplary transmission connection 122 includes a worm 1225 and a second connection 1226; the second connection 1226 is mounted on the worm 1225 and detachably connected with the polarizer 110; the driving mechanism 123 includes a second driving member 1231, a limiting member 1232 and a worm gear member 1233. The driving end of the second driving member 1231 is connected with one end of the worm 1225 for driving the worm 1225 to rotate. The limiting member 1232 has a circumferential limiting portion 1234 and an axial limiting portion 1235; the circumferential limiting portion 1234 is in sliding fit with the second driving member 1231 along the axial direction of the camera 200; the axial limiting portion 1235 is in abutment or separation with the second driving member 1231. The worm gear member 1233 is in abutment or separation with the side surface of the worm 1225; when the worm gear member 1233 is in abutment with the side surface of the worm 1225, the second driving member 1231 drives the worm 1225 to rotate, so that the second driving member 1231 and the worm 1225 move synchronously along the axial direction of the camera 200; when the worm gear member 1233 is separated from the worm 1225, the second driving member 1231 is in abutment with the axial limiting portion 1235, and the second driving member 1231 drives the second connection 1226 to rotate through the worm 1225 to drive the polarizer 110 to rotate. Specifically, when it is needed to adjust the polarizer 110 connected with the second connection 1226, the worm gear member 1233 is in abutment with the side surface of the worm 1225, and the second driving member 1231 drives the worm 1225 to rotate; at this time, the worm 1225 moves along the axial direction of the camera 200 relative to the worm gear member 1233, and the worm 1225 drives the second driving member 1231 and the circumferential limiting portion 1234 to slide along the axial direction of the camera 200 in fit, until the second connection 1226 is connected with a new polarizer 110. Then, the worm gear member 1233 is separated from the side surface of the worm 1225, the second driving member 1231 is in abutment with the axial limiting portion 1235, the second driving member 1231 continues to drive the worm 1225 to rotate, and the second driving member 1231 no longer rotates due to the limitation of the axial limiting member 1232 and the circumferential limiting member 1232, and the worm 1225 continuously drives the polarizer 110 to rotate.

[0081] Further, the worm gear member 1233 includes a worm gear and a worm gear driving member; the worm gear driving member drives the worm gear to approach or move away from the side surface of the worm 1225, so that the worm gear is in abutment or separation with the side surface of the worm 1225.

[0082] The second aspect of the embodiment provides an image acquisition device. The image acquisition device includes the camera 200 and the light reduction component 100 of any of the above embodiments.

[0083] The image acquisition device of the embodiment includes the light reduction component 100 of any of the above embodiments, and thus has at least the above advantages, which will not be described herein.

[0084] Further, the image acquisition device further comprises a shell 300; the camera 200 is installed in the shell 300, and the light reduction component 100 is installed in the shell 300 or outside the shell 300. Preferably, the light reduction component 100 is installed in the shell 300, so that the light reduction component 100 can be prevented from being contaminated.

[0085] Further, the image acquisition device further comprises a light acquisition component; the light acquisition component is used for acquiring exposure brightness. Specifically, the light acquisition component can be a light collector.

[0086] The working flow of the image acquisition device of the embodiment comprises the following steps:

[0087] Initialization, at this time, none of the polarizers 110 blocks the camera 200.

[0088] The light acquisition component acquires exposure brightness.

[0089] When the exposure brightness meets the light requirement, the light reduction step is not needed.

[0090] When the exposure brightness does not meet the light requirement, the driving assembly 120 drives the first polarizer 110 to block the camera 200, and rotates the first polarizer 110 to eliminate the imaging white-out problem, that is, to eliminate the influence of glass reflection on imaging; at the same time, it is judged again whether the exposure brightness meets the light requirement, if yes, the light reduction step is ended; if not, the driving assembly 120 drives the second polarizer 110 to rotate until the exposure brightness meets the requirement.

[0091] When the first polarizer 110 rotates to the end and still cannot eliminate the imaging white-out problem, the driving assembly 120 drives the second polarizer 110 to rotate until the imaging white-out problem is eliminated.

[0092] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light reduction component, characterized in that: include: A plurality of polarizing plates (110), the plurality of polarizing plates (110) being arranged at the front end of the camera (200) along the axial direction of the camera (200); the polarizing plates (110) being used to reduce light incident on the camera (200); A driving assembly (120) is connected to the plurality of polarizing plates (110), and the driving assembly (120) is used to drive the polarizing plates (110) to rotate around the axis of the camera (200), so that at least one of the polarizing plates (110) covers the camera (200), or so that none of the polarizing plates (110) covers the camera (200).

2. The light reduction component according to claim 1, wherein: When the polarizing plate (110) just covers the camera (200), the polarizing plate (110) has a rotation margin of not less than 90°.

3. The light reduction component according to claim 1, wherein: The filtering angles of the plurality of polarizers (110) are the same; when the polarizer (110) just covers the camera (200), the polarizer (110) has a rotation margin of less than 90°, and the sum of the rotation margins of the plurality of polarizers (110) is not less than 90°.

4. The light reduction component according to claim 3, characterized in that: It comprises two polarizing plates (110); when the polarizing plates (110) just cover the camera (200), the polarizing plates (110) have a rotation margin of 45°.

5. The light reduction component according to claim 1, wherein: Also includes: A plurality of limiting mechanisms (130), wherein the plurality of limiting mechanisms (130) correspond one-to-one to the plurality of polarizers (110); the limiting mechanisms (130) are slidably engaged with the side of the corresponding polarizer (110) away from its own rotation center.

6. The light reduction component according to claim 1, wherein: The driving assembly (120) comprises: A plurality of first driving members (121), the plurality of first driving members (121) corresponding one-to-one to the plurality of polarizers (110), the first driving members (121) being connected to the corresponding polarizers (110) and being used to drive the polarizers (110) to rotate.

7. The light reduction component according to claim 1, characterized in that: The driving assembly (120) comprises: a transmission connection member (122) detachably connected to the polarizer (110); A driving mechanism (123) is connected to the transmission connecting member (122), and the driving mechanism (123) is used to drive the transmission connecting member (122) to move along the axial direction of the camera (200), so that the transmission connecting member (122) and any one of the polarizing plates (110) are detachably connected; the driving mechanism (123) is also used to drive the transmission connecting member (122) to rotate around the axial direction of the camera (200), so that the polarizing plate (110) rotates.

8. The light reduction component according to claim 7, characterized in that: The transmission connecting member (122) comprises: A housing (1221) having an accommodating cavity therein; The screw rod (1222) is located in the accommodating cavity; the driving mechanism (123) is located outside the accommodating cavity and is connected to one end of the screw rod (1222) for driving the screw rod (1222) to rotate; the other end of the screw rod (1222) extends along the axial direction of the camera (200); a first connecting member (1223), the first connecting member (1223) being threadably engaged with the screw rod (1222), the first connecting member (1223) being detachably connected to the polarizer (110), and the first connecting member (1223) being circumferentially limited to the inner side surface of the housing (1221); The locking member (1224) is in contact with or separated from the housing (1221); when the locking member (1224) is in contact with the housing (1221), the driving mechanism (123) drives the first connecting member (1223) to move axially along the camera (200) via the screw rod (1222); when the locking member (1224) is separated from the housing (1221), the driving mechanism (123) drives the first connecting member (1223) and the housing (1221) to rotate synchronously via the screw rod (1222).

9. The light reduction component according to claim 7, wherein: The transmission connecting member (122) comprises a worm (1225) and a second connecting member (1226); the second connecting member (1226) is mounted on the worm (1225) and is detachably connected to the polarizer (110); the driving mechanism (123) comprises: a second driving member (1231), wherein a driving end of the second driving member (1231) is connected to one end of the worm (1225) and is used to drive the worm (1225) to rotate; The limiting member (1232) comprises a circumferential limiting portion (1234) and an axial limiting portion (1235); the circumferential limiting portion (1234) and the second driving member (1231) are slidably engaged along the axial direction of the camera (200); the axial limiting portion (1235) and the second driving member (1231) are in contact with or separated from each other; The worm wheel (1233) is in contact with or separated from the side surface of the worm (1225); when the worm wheel (1233) is in contact with the side surface of the worm (1225), the second driving member (1231) drives the worm (1225) to rotate, so that the second driving member (1231) and the worm (1225) move synchronously along the axial direction of the camera (200); when the worm wheel (1233) is separated from the worm (1225), the second driving member (1231) is in contact with the axial limiting portion (1235), and the second driving member (1231) drives the second connecting member (1226) to rotate through the worm (1225), so as to drive the polarizing plate (110) to rotate.

10. An image acquisition device, characterized in that: It comprises a camera (200), and the light reduction component (100) according to any one of claims 1 to 9.

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