CN218383611U - Video camera - Google Patents

Abstract

The application provides a camera, including lens subassembly, protecgulum, window glass and reflector assembly. Wherein, the protecgulum includes the perforating hole, and protecgulum and perforating hole are the rectangle, and the top edge and the lower limb level of perforating hole extend, and the protecgulum includes relative first lateral wall and second lateral wall in the horizontal direction, and the protecgulum includes the first preceding curb plate of connecting perforating hole and first lateral wall on the horizontal direction, and the second preceding curb plate of connecting perforating hole and second lateral wall on the horizontal direction. The window glass is arranged in the through hole so that the ambient light can be emitted into the front cover and then the lens assembly. The reflector component is arranged on a light path from the window glass to the lens component. The reflecting surface of the reflecting mirror assembly is opposite to the lens, the reflecting mirror and the lens assembly are arranged in the horizontal direction, the lens assembly is close to the first side wall relative to the reflecting mirror, at least part of the lens assembly is positioned behind the first front side plate, and the incident plane of the window glass and the incident plane of the lens are not vertical.

Description

Video camera

Technical Field

The utility model relates to a control technical field especially relates to a camera.

Background

With the continuous development of monitoring devices and the continuous increase of application scenes, the functions of the monitoring devices are also continuously improved. At present, when monitoring equipment shoots a monitoring scene, a lens can shoot an object within a field angle range, however, a light source outside the field angle is reflected by a reflector and then reflected by window glass to enter the lens for imaging, and the light source is not in an imaging area. Therefore, an object which does not need to be imaged can enter the lens, and the lens generates a relatively obvious image ghost image. The more obvious ghost image affects the definition of the shot image.

SUMMERY OF THE UTILITY MODEL

The present application provides an improved camera comprising:

a lens assembly including a lens;

the front cover comprises a first side wall and a second side wall which are opposite to each other in the horizontal direction, the front cover comprises a first front side plate and a second front side plate, the first front side plate is connected with the through hole and the first side wall in the horizontal direction, and the second front side plate is connected with the through hole and the second side wall in the horizontal direction, wherein the width of the first front side plate in the horizontal direction is larger than that of the second front side plate in the horizontal direction;

the window glass is arranged in the through hole so that ambient light can be emitted into the front cover and then the lens assembly;

the reflecting mirror assembly is arranged on a light path from the window glass to the lens assembly of the ambient light;

the reflecting mirror assembly comprises a reflecting mirror, the reflecting surface of the reflecting mirror is opposite to the lens, the reflecting mirror and the lens assembly are arranged in the horizontal direction, the lens assembly is close to the first side wall relative to the reflecting mirror, at least part of the lens assembly is located behind the first front side plate, and the incident plane of the window glass is not vertical to the incident plane of the lens.

Furthermore, the lens assembly comprises a pitching rotation structure, the pitching rotation structure is connected with the lens to drive the lens to rotate in a pitching manner, and in the pitching range of the lens, a track line extending in the vertical direction and intersecting the optical axis of the lens and the reflector deviates from the center of the reflecting surface.

Furthermore, the window glass is obliquely arranged front and back.

Further, the reflector assembly comprises a horizontal rotating structure connected with the reflector, and the horizontal rotating structure drives the reflector to rotate in the horizontal direction;

the inclination angle of the window glass is determined by the horizontal rotation angle of the reflector, so that part of ambient light rays emitted into the window glass is reflected by the reflector and then emitted out of the window glass without being emitted into the lens assembly.

Furthermore, the upper end part of the window glass is arranged in a forward inclining mode, and the distance between the upper end part of the window glass and the reflecting mirror is larger than the distance between the lower end part of the window glass and the reflecting mirror.

Further, the rotating shaft of the reflector is perpendicular to and coplanar with the optical axis of the lens assembly; and/or

The window glass and the reflector are not parallel.

Further, the window glass extends from one side close to the lens assembly to the other opposite side in a forward tilting manner.

Furthermore, the window glass and the reflector are in parallel positions relatively.

Furthermore, the intersection point of the normal line at the center of the window glass and the reflecting surface of the reflecting mirror coincides with the center of the reflecting surface, or deviates from the center of the reflecting surface and deviates to one side of the reflecting mirror close to the lens.

Furthermore, the intersection point of the normal line at the center of the window glass and the reflecting surface of the reflecting mirror and the connecting line of the center of the reflecting surface are horizontal lines, and the reflecting mirror is vertically symmetrical relative to the horizontal lines.

In some embodiments, a camera of the present application includes a lens assembly, a bezel, a window glass, and a mirror assembly. The front cover comprises a through hole, the front cover and the through hole are rectangular, the upper edge and the lower edge of the through hole horizontally extend, the front cover comprises a first side wall and a second side wall which are opposite to each other in the horizontal direction, the front cover comprises a first front side plate and a second front side plate, the through hole and the first side wall are connected in the horizontal direction, and the second front side plate is connected with the through hole and the second side wall in the horizontal direction. The width of the first front side plate in the horizontal direction is larger than that of the second front side plate in the horizontal direction. The window glass is arranged in the through hole so that the ambient light can be emitted into the front cover and then the lens assembly. The reflector component is arranged on a light path from the window glass to the lens component. The reflecting mirror assembly comprises a reflecting mirror, the reflecting surface of the reflecting mirror is opposite to the lens, the reflecting mirror and the lens assembly are arranged in the horizontal direction, the lens assembly is close to the first side wall relative to the reflecting mirror, at least part of the lens assembly is located behind the first front side plate, and the incident plane of the window glass and the incident plane of the lens are not perpendicular. Therefore, the incident plane of the window glass is not perpendicular to the incident plane of the lens, light rays outside the field are reflected/refracted/absorbed by the window glass for multiple times, and the light rays outside the field enter the lens less, so that useless light entering the lens is reduced, ghost images in the image shot by monitoring are weakened, and the definition of the shot image is improved.

Drawings

FIG. 1 is a perspective view of a camera according to an embodiment of the present application;

FIG. 2 is a front view of the camera of FIG. 1 with the window glass removed;

FIG. 3 is an exploded view of the camera shown in FIG. 1;

fig. 4 is a schematic perspective view illustrating a mirror and a window glass in a camera according to an embodiment of the present disclosure;

FIG. 5a is a schematic view of the glazing of FIG. 1 tilted back and forth about the Y-axis by an angle of 15;

FIG. 5b is a schematic view of the glazing of FIG. 1 tilted back and forth about the Y axis by an angle of 20;

FIG. 5c is a schematic view of the glazing of FIG. 1 tilted back and forth about the Y-axis by an angle of 25;

FIG. 6 is a front view of the mirror and lens shown in FIG. 2;

FIG. 7 is a rear view of the lens assembly of the camera shown in FIG. 2;

FIG. 8 is a perspective view of a mirror assembly and lens assembly of the camera of FIG. 1;

fig. 9 is a schematic perspective view of another embodiment of a camera provided in the embodiments of the present application;

FIG. 10a is a first optical path diagram for imaging by a light source outside the field of view of the camera of FIG. 9;

fig. 10b shows a second optical path diagram for imaging by a light source outside the field of view of the camera shown in fig. 9.

Description of reference numerals:

10-camera, 11-housing component, 12-host, 13-lens component, 131-optical axis of lens component, 132-lens, 23-trace, 133-first tilt boundary position, 134-second tilt boundary position, 14-second lens component, 142-second lens, 141-optical axis of second lens component, W-first direction, 16-front cover, 161-through hole, 161 a-upper edge, 161 b-lower edge, 161 c-first front side plate, 161 d-second front side plate, 1611-first side wall, 1612-second side wall, 1613-window glass, 1613 a-upper end, 1613 b-lower end, 162-second through hole, 15-mirror component, 151-mirror, 153-first side, 154-second side, 157-rotation axis, 1511-reflection plane, 1512-center of reflection plane, 21-horizontal rotation structure, 41-tilt rotation structure.

Detailed Description

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

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" includes two, and is equivalent to at least two. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

In order to solve comparatively obvious image ghost, can influence the technical problem of the definition of the image of control shooting, the camera of this application includes lens subassembly, protecgulum, window glass and reflector assembly. The front cover comprises a through hole, the front cover and the through hole are rectangular, the upper edge and the lower edge of the through hole horizontally extend, the front cover comprises a first side wall and a second side wall which are opposite to each other in the horizontal direction, the front cover comprises a first front side plate and a second front side plate, the through hole and the first side wall are connected in the horizontal direction, and the second front side plate is connected with the through hole and the second side wall in the horizontal direction. The width of the first front side plate in the horizontal direction is larger than that of the second front side plate in the horizontal direction. The window glass is arranged in the through hole so that the ambient light can be emitted into the front cover and then the lens assembly. The reflector component is arranged on a light path from the window glass to the lens component. The reflecting mirror assembly comprises a reflecting mirror, the reflecting surface of the reflecting mirror is opposite to the lens, the reflecting mirror and the lens assembly are arranged in the horizontal direction, the lens assembly is close to the first side wall relative to the reflecting mirror, at least part of the lens assembly is located behind the first front side plate, and the incident plane of the window glass and the incident plane of the lens are not perpendicular. Therefore, the incident plane of the window glass is not perpendicular to the incident plane of the lens, light rays outside the field are reflected/refracted/absorbed by the window glass for multiple times, and the light rays outside the field enter the lens less, so that useless light entering the lens is reduced, ghost images in the image shot by monitoring are weakened, and the definition of the shot image is improved.

Fig. 1 is a perspective view of a camera 10 according to an embodiment of the present application. Fig. 2 is a front view of the camera 10 shown in fig. 1 with the window glass 1613 removed. Fig. 3 shows an exploded view of the camera 10 shown in fig. 1.

As shown in fig. 1 and 2, the camera 10 according to the embodiment of the present disclosure may include, but is not limited to, a housing assembly 11 and a host 12 respectively housed inside the housing assembly 11. The host 12 includes a lens assembly 13, a second lens assembly 14, and a mirror assembly 15. Lens assembly 13 is also referred to as a first lens assembly, which includes a first lens, also referred to as lens 132. The second lens assembly 14 is used to capture images of the monitored area and may be referred to as a panoramic lens assembly. The lens assembly 13 is used for performing detail photographing or enlarged photographing on an image photographed by the second lens assembly 14, and may be referred to as a detail lens assembly. The mirror assembly 15 is located on the optical path of the light incident to the lens assembly 13, and reflects the light to the lens assembly 13. In this manner, imaging can be achieved by reflection of light by the mirror assembly 15.

Wherein, the angle of view of the lens assembly 13 is smaller than the angle of view of the second lens assembly 14. In this way, the range of the monitoring area shot by the second lens assembly 14 covers the range of the monitoring area shot by the lens assembly 13, so that detail enlargement of the image shot by the second lens assembly 14 can be realized. The lens assembly 13 includes a lens 132, and the lens 132 is tiltable. The mirror assembly 15 is horizontally rotatable. The second lens assembly 14 is not movable, as will be described in detail below. As further shown in fig. 2, the orthographic projection of the optical axis 141 of the second lens assembly 14 and the optical axis 131 of the lens assembly 13 on a horizontal plane are perpendicular to each other. In this way, when the lens assembly 13 is in the horizontal position, the lens assembly 13 and the second lens assembly 14 can be in the horizontal direction and the vertical direction, and the volume of the camera 10 can be reduced as much as possible. The first direction W may be a horizontal direction and a left-right direction.

As shown in fig. 1 to 3, the housing assembly 11 includes a front cover 16, and the front cover 16 is disposed outside the main body 12 to protect the main body 12 and facilitate light to enter, so as to capture images.

The front cover 16 includes a through hole 161. The through hole 161 is configured to allow light to enter the lens assembly 13, and may be referred to as a window. The front cover 16 and the through hole 161 have a rectangular shape, an upper edge 161a and a lower edge 161b of the through hole 161 extend horizontally, the front cover 16 includes a first side wall 1611 and a second side wall 1612 opposite to each other in the horizontal direction, the front cover 16 includes a first front side plate 161c connecting the through hole 161 and the first side wall 1611 in the horizontal direction, and a second front side plate 161d connecting the through hole 161 and the second side wall 1612 in the horizontal direction, wherein a width of the first front side plate 161c in the horizontal direction is larger than a width of the second front side plate 161d in the horizontal direction.

A window glass 1613 is disposed in the through hole 161 to allow ambient light to enter the front cover 16 and further enter the lens assembly 13.

The mirror assembly 15 is disposed in the optical path of the ambient light from the window glass 1613 to the lens assembly 13, and enlarges the visible area. The mirror assembly 15 includes a mirror 151, a reflecting surface 1511 of the mirror 151 is opposite to the lens 132, the mirror 151 and the lens assembly 13 are arranged in a horizontal direction, the lens assembly 13 is close to the first side wall 1611 relative to the mirror 151, the lens assembly 13 is at least partially located behind the first front side plate 161c, and the window glass 1613 is not perpendicular to an incident surface of the lens 132. Thus, the window glass 1613 is not perpendicular to the incident plane of the lens 132, so that the light entering the outside of the field of view of the lens 132 can be reduced, and ghost images can be improved.

Among them, the reflecting mirror 151 is disposed corresponding to the through hole 161 and configured to reflect the light incident through the through hole 161 to the lens assembly 13. Thus, the lens assembly 13 and the second lens assembly 14 realize double-lens image shooting, the reflecting mirror 151 realizes light incidence of the lens assembly 13, the visible area is enlarged, and the structure is simple.

Continuing with FIG. 1, the window glass 1613 is tilted back and forth. By such a front-back oblique arrangement, the non-perpendicularity between the window glass 1613 and the incident plane of the lens 132 can be realized. Thus, the window glass 1613 is not perpendicular to the incident plane of the lens 132, so that the light entering the lens 132 outside the field of view is reduced and weakened, and ghost images are weakened.

In some embodiments, the intersection point of the normal at the center of the window glass 1613 and the reflective surface 1511 of the mirror 151 coincides with the center 1512 of the reflective surface 1511, or is offset from the center 1512 of the reflective surface 1511 and is biased toward the side of the mirror 151 near the lens. Thus, the volume of the reflecting mirror 151 can be reduced to reduce the volume of the entire camera.

In some embodiments, the intersection point of the normal line at the center of the window glass 1613 and the reflecting surface 1511 of the reflecting mirror 151 and the line connecting the center 1512 of the reflecting surface 1511 is a horizontal line, and the reflecting mirror 151 is vertically symmetrical with respect to the horizontal line. Thus, the reflecting mirror 151 is vertically symmetrical with respect to the horizontal line, increasing an effective reflecting area.

In the embodiment shown in fig. 1, the upper end 1613a of the window glass 1613 is tilted forward, and the distance between the upper end 1613a of the window glass 1613 and the reflector 151 is greater than the distance between the lower end 1613b of the window glass 1613 and the reflector 151. Thus, the window glass 1613 is disposed to be inclined forward from top to bottom in the longitudinal direction, so that the window glass 1613 is not perpendicular to the incident plane of the lens 132. Meanwhile, the window glass 1613 can improve the ghost image problem of the monitoring picture, so that the image picture effect of the camera is better, and the product has higher competitiveness. Moreover, the ghost image improvement mode is simple and effective, only the window glass 1613 needs to be inclined, and additional component cost does not need to be added.

Continuing with FIG. 2, the rotational axis 157 of the mirror 151 is perpendicular to and coplanar with the optical axis 131 of the lens 132. Thus, the light from the reflector 151 can be incident on the lens 132 more easily.

The window glass 1613 and the reflecting mirror 151 are not parallel. Thus, the upper end 1613a of the window glass 1613 is tilted forward, is not parallel to the horizontally rotating reflector 151, and is not perpendicular to the incident plane of the lens 132, so as to reduce the light outside the field of view from entering the lens 132.

Continuing with fig. 2, the second through hole 162 corresponds to the second lens assembly 14, and is configured to allow light to enter the second lens assembly 14, which may be referred to as a window. The through hole 161 is located above the second through hole 162, and the through hole 161 and the second through hole 162 are arranged in the upper and lower directions such that the lens assembly 13 is located above the second lens assembly 14, and the area of the through hole 161 is larger than that of the second through hole 162. The area of the through hole 161 is determined by the reflection mirror 151 and the lens block 13, and the area of the second through hole 162 is determined by the second lens block 14.

The vertical dimension of the through hole 161 is greater than the vertical dimension of the second through hole 162, and the horizontal dimension of the through hole 161 is equal to or greater than the horizontal dimension of the second through hole 162. In this way, the area of the through hole 161 receiving light is larger than the area of the second through hole 162 receiving light, which is more advantageous for the light of the mirror assembly 15 to enter, and the second through hole 162 is smaller than the through hole 161, which is also advantageous for the miniaturization of the device volume.

Continuing with fig. 2 and 3, the lens 132 is fixed to the housing assembly 11 by a mounting bracket (not shown) to form the lens assembly 13; the window glass 1613 is fixed to the front cover 16 by dispensing. The mirror 151 is fixed to a mirror 151 mounting bracket (not shown) to form the mirror assembly 15. The initial position of the reflector 151 forms 45 degrees with the optical axis 131 of the lens 132, and the angle of the reflector 151 which can rotate around the initial position is-45 degrees and is not less than 45 degrees.

Fig. 4 is a schematic perspective view illustrating the reflecting mirror 151 and the window glass 1613 in the camera 10 according to the embodiment of the present disclosure.

As shown in fig. 1 and 4, the upper end 1613a of the window glass 1613 is tilted forward in the Y-axis direction by different cameras 10, and the angle β between the reflecting mirror 151 and the window glass 1613 in the XOZ plane is different. The larger the included angle beta between the reflector 151 and the window glass 1613 in the XOZ plane, the better, beta is more than or equal to 0 and less than or equal to 90 degrees.

FIG. 5a is a schematic view of the viewing window glass 1613 of FIG. 1 tilted back and forth about the Y-axis by an angle of 15. FIG. 5b is a schematic view of the window glass 1613 of FIG. 1 tilted back and forth about the Y-axis by an angle of 20. Fig. 5c is a schematic view of the window glass 1613 of fig. 1 tilted forward and backward at an angle of 25 ° with respect to the Y-axis.

As shown in fig. 5a, 5b and 5c, light outside the field of view cannot enter the lens after passing through the window glass 1613, thereby improving the number and intensity of ghost images. The lower diagram is a ghost ray diagram in the case where the angle β is 15 °, 20 °, 25 °. With such a tilt of the window glass 1613 at an angle β of 15 °, an angle β of 20 °, and an angle β of 25 °, a ghost image energy ratio of about 1100.

Fig. 6 is a front view of the mirror 151 and the lens 132 shown in fig. 2. Fig. 7 is a rear view of the lens assembly of the camera shown in fig. 2.

As shown in fig. 6 and 7, the lens assembly 13 includes a tilting structure 41, which realizes tilting of the lens assembly 13. The pitching rotation structure 41 is connected to the lens 132 to drive the lens 132 to pitch and rotate, and within the pitching range of the lens 132, the optical axis 131 of the lens 132 intersects with the track line 23 extending in the vertical direction of the reflector 151, and deviates from the center 1512 of the reflection surface 1511. In this way, the tilting structure 41 drives the lens 132 to tilt and rotate, so that the lens assembly 13 tilts and rotates to capture an image of the monitored area, and the window glass 1613 is not perpendicular to the incident plane of the lens 132, so as to improve the ghost image in the image of the monitored area captured by the lens 132 in the whole tilting process.

Continuing with FIG. 6, the tilt range of lens 132 is the range formed by first tilt boundary position 133 and second tilt boundary position 134, lens 132 is rotated in tilt between first tilt boundary position 133 and second tilt boundary position 134, and optical axis 131 of lens 132 and trace line 23 of mirror 151 are offset from center 1512 of reflective surface 1511 of mirror 151 when lens 132 is rotated from first tilt boundary position 133 to second tilt boundary position 134 and mirror 151 is held stationary at all times. In this manner, the optical axis 131 of the lens 132 and the trace line 23 of the reflecting mirror 151 are not collinear with the center 1512 of the reflecting surface 1511 of the reflecting mirror 151, enabling the lens assembly 13 to tilt and shoot images of the monitored area, as well as enabling the camera 10 to be miniaturized. The first and second pitch boundary positions 133 and 134 in fig. 9 are merely examples, and the specific positions of the first and second pitch boundary positions 133 and 134 are not limited.

Continuing with fig. 7, the pitch rotation structure 41 may include, but is not limited to, a pitch rotation motor. The tilt motor is used to drive the lens 132 to tilt. Thus, the tilting motor is connected to the lens 132 to drive the lens 132 to tilt. Therefore, the pitching rotation motor drives the lens 132 to vertically rotate, the long-distance and large-range monitoring of the camera 10 is realized through the reflection imaging principle, and the whole structure is simple, the size is small and the cost is low.

Fig. 8 is a perspective view of the mirror assembly and lens assembly 13 of the camera 10 shown in fig. 1.

As shown in fig. 8, the mirror assembly 15 further includes a horizontal rotation structure 21 connected to the mirror 151. The horizontal rotating structure 21 drives the reflector 151 to rotate in the horizontal direction; the tilt angle of the window glass 1613 is determined by the horizontal rotation angle of the reflector 151, so that the ambient light incident on the window glass 1613 is partially reflected by the reflector 151 and then exits the window glass 1613 without being incident on the lens assembly 13. Thus, part of the ambient light incident on the window glass 1613 is reflected by the reflector 151 and then exits from the window glass 1613 without entering the lens assembly 13, so that light outside the field of view is reduced from entering the lens 132.

Wherein the horizontal rotation structure 21 is configured to drive the mirror 151 to rotate horizontally to achieve horizontal rotation of the mirror 151. The horizontal rotation structure 21 may include, but is not limited to, a horizontal rotation motor. The horizontal rotation motor is connected to the reflecting mirror 151, and the horizontal rotation motor drives the reflecting mirror 151 to rotate horizontally. Wherein the horizontal rotation motor and the second lens assembly 14 are located below the reflecting mirror 151, so that the horizontal rotation motor and the second lens assembly 14 are located on the same side in the up-down direction of the reflecting mirror 151. When the horizontal rotation motor rotates, the mirror 151 is driven to rotate horizontally. Therefore, the lens assembly 13 does not need to horizontally rotate, the reflector assembly 15 can horizontally rotate, and the image of the monitored area is displayed on the lens assembly 13 through light reflection of the reflector 151, so that the whole structure is simple and the size is small.

Continuing with fig. 8, the horizontal rotation motor may be a direct drive motor. In this way, the motor shaft 211 of the horizontal rotation motor is directly connected to the rotation shaft 157 of the mirror assembly 15 without any other transmission member therebetween. Therefore, the horizontal rotating motor is used as a power source to directly drive the reflector component 15 to be driven to move, the transmission of other transmission components is reduced, the cost is saved, and the miniaturization of the structure is facilitated. And simultaneously, the horizontal movement of the reflecting mirror 151 is realized, and the monitoring range of the camera 10 is effectively improved. Continuing with fig. 8, the mirror 151 includes first and second sides 153, 154 opposite in the first direction W. First lens 132 is positioned on second side 154 toward mirror 151 with rotational axis 157 of mirror 151 offset from center 1512 of reflective surface 1511 of mirror 151 and closer to second side 154 than to first side 153. Thus, the second side 154 of the mirror 151 is close to the first lens 132, and image distortion is small. The first side 153 of the mirror 151 is distant from the first lens 132, and the range in which imaging can be performed is wide. Meanwhile, the rotation axis 157 of the reflector 151 is offset from the center 1512 of the reflecting surface 1511 of the reflector 151, and compared with the range of the imaging by the rotation axis symmetry structure of the reflector 151, the second side 154 of the reflector 151 is shorter than the rotation axis 157, and occupies a smaller volume.

Fig. 9 is a schematic perspective view of another embodiment of the camera 10 according to the embodiment of the present application. Fig. 10a shows a first optical path diagram for imaging by a light source outside the field of view of the camera shown in fig. 9. Fig. 10b shows a second optical path diagram for imaging by a light source outside the field of view of the camera shown in fig. 9.

The embodiment shown in fig. 9-10 b is similar to the embodiment shown in fig. 1-3, and in the embodiment shown in fig. 9, the window glass 1613 is tilted back and forth such that the window glass 1613 extends forward from one side adjacent to the lens assembly to the opposite side, as compared to the embodiment shown in fig. 1-3. In this way, the window glass 1613 is disposed in a manner of inclining forward from the first sidewall to the second sidewall in the lateral direction, and the window glass 1613 may not be perpendicular to the incident plane of the lens 132. Meanwhile, the window glass 1613 can greatly improve the ghost image problem of the monitoring picture, so that the image picture effect of the camera is better, and the product has higher competitiveness. Moreover, the ghost image improvement mode is simple and effective, only the window glass 1613 needs to be inclined, and additional component cost does not need to be added. For a detailed description, please refer to the following.

Continuing with fig. 9 and 10a, the viewing glass 1613 is positioned relatively parallel to the reflector 151. Thus, it is more beneficial to reduce the incidence of out-of-field light rays into the lens 132.

As shown in fig. 9, 10a, and 10b, the lens angle is shown between the two-dot chain lines. The light L1 outside the field angle is transmitted through the window glass 1613 and enters the reflecting mirror 151. Since the reflector 151 and the window glass 1613 are approximately equal to 0 ° and approximately parallel to each other, the window glass 1613 is not perpendicular to the incident plane of the lens 132, and since the reflector 151 implements total reflection of light, all of the transmitted light L2 of the light L1 outside the field angle passes through the reflector 151 and is reflected to the window glass 1613. Since the window glass 1613 transmits part of the light L3 of the transmitted light L2 again and continues to reflect part of the reflected light L4, the light intensity of the part of the reflected light L4 is less than that of the transmitted light L2. By analogy, after the reflection of the window glass 1613 for many times, the intensity of the light L1 outside the transmission angle of view gradually weakens, so that the intensity of the light L1 outside the transmission angle of view is reduced, and the ghost image is weakened.

As shown in fig. 10a and 10b, since the mirror 151 and the window glass 1613 are approximately equal to 0 ° and approximately parallel to each other, and the window glass 1613 is not perpendicular to the incident surface of the lens 132, the light L1 outside the transmission angle of view is reflected for multiple times and cannot enter the lens 132, so that the number of the light L1 outside the transmission angle of view is reduced, and the ghost image is improved. The line thickness in fig. 10a and 10b may roughly reflect the light intensity.

As further shown in fig. 9, the different cameras 10 extend obliquely forward along the Z-axis from the side near the lens assembly to the opposite side, with different angles α between the mirror 151 and the window glass 1613. The angle α between the mirror 151 and the window glass 1613 is preferably as small as possible, and may be 0 ° at the minimum. In addition, most of the light outside the field of view of the lens 132 cannot enter the lens 132 after passing through the window glass 1613, thereby improving the amount and intensity of ghost images.

The above description is only a preferred embodiment of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises a … …" defines an element does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element.

Claims (10)

1. A camera, comprising:

a lens assembly including a lens;

the front cover comprises a first side wall and a second side wall which are opposite to each other in the horizontal direction, the front cover comprises a first front side plate and a second front side plate, the first front side plate is connected with the through hole and the first side wall in the horizontal direction, and the second front side plate is connected with the through hole and the second side wall in the horizontal direction, wherein the width of the first front side plate in the horizontal direction is larger than that of the second front side plate in the horizontal direction;

the window glass is arranged in the through hole so that ambient light can be emitted into the front cover and then the lens assembly;

the reflecting mirror assembly is arranged on a light path from the window glass to the lens assembly of the ambient light;

the reflecting mirror assembly comprises a reflecting mirror, the reflecting surface of the reflecting mirror is opposite to the lens, the reflecting mirror and the lens assembly are arranged in the horizontal direction, the lens assembly is close to the first side wall relative to the reflecting mirror, at least part of the lens assembly is located behind the first front side plate, and the incident plane of the window glass is not vertical to the incident plane of the lens.

2. The camera of claim 1, wherein the lens assembly includes a tilt mechanism coupled to the lens for tilting the lens, wherein a vertically extending trajectory through which an optical axis of the lens intersects the reflector is offset from a center of the reflective surface over a range of tilt of the lens.

3. The camera of claim 1, wherein the window glass is tilted back and forth.

4. The camera of claim 3, wherein the mirror assembly includes a horizontal pivot structure coupled to the mirror, the horizontal pivot structure causing the mirror to pivot in a horizontal direction;

the inclination angle of the window glass is determined by the horizontal rotation angle of the reflector, so that part of ambient light rays emitted into the window glass is reflected by the reflector and then emitted out of the window glass without being emitted into the lens assembly.

5. The camera according to claim 3, wherein an upper end portion of the window glass is disposed obliquely forward, and a distance between the upper end portion of the window glass and the reflecting mirror is larger than a distance between a lower end portion of the window glass and the reflecting mirror.

6. The camera of claim 5, wherein the axis of rotation of the mirror is perpendicular to and coplanar with the optical axis of the lens assembly; and/or

The window glass and the reflector are not parallel.

7. The camera of claim 3, wherein the window glass extends forwardly from one side adjacent the lens assembly to an opposite side.

8. The camera of claim 7, wherein the window glass and the reflector are in relatively parallel positions.

9. The camera of claim 3, wherein a point of intersection of a normal at the center of the window glass and the reflecting surface of the reflecting mirror coincides with the center of the reflecting surface or is offset from the center of the reflecting surface toward a side of the reflecting mirror near the lens.

10. The camera according to claim 3, wherein a line connecting a normal line at a center of the window glass and the reflecting surface of the reflecting mirror with a center of the reflecting surface is a horizontal line, and the reflecting mirror is vertically symmetrical with respect to the horizontal line.

Images