Image pickup apparatus

Abstract

The embodiment of the utility model provides a camera device, which comprises a light-transmitting body, a light-transmitting lens and a light-transmitting lens, under the condition that the light shielding body is attached to the light transmitting body, the light shielding body is located on the light entering face of the light transmitting body and used for restraining light rays entering the light transmitting body from the target angle; and the sensor is arranged on the light emitting side of the light-transmitting body and is used for receiving the light passing through the light-transmitting body and imaging. Therefore, the problem of poor imaging effect of the camera device in the prior art can be solved, and the technical effect of improving the imaging effect of the camera device is further achieved.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and more specifically, to a camera device. Background Technology

[0002] In related technologies, when the ambient light is low and the brightness of the object being photographed is high, the resulting image may show a large halo around the object.

[0003] This indicates that the related technologies suffer from poor imaging quality due to the camera equipment.

[0004] There is currently no effective solution to the aforementioned problems in the relevant technologies. Utility Model Content

[0005] This utility model provides a camera device to at least solve the problem of poor imaging effect of camera devices in related technologies.

[0006] According to one embodiment of the present invention, a camera device is provided, comprising: a light-transmitting body; a light-shielding body, wherein when the light-shielding body is attached to the light-transmitting body, the light-shielding body is located on the light-incident surface of the light-transmitting body, for suppressing light incident on the light-transmitting body from a target angle; and a sensor, wherein the sensor is disposed on the light-exiting side of the light-transmitting body, for receiving light passing through the light-transmitting body and forming an image.

[0007] In an exemplary embodiment, the angle between the light-incident surface and the light-exiting surface of the light-shielding body is a first included angle. The light-shielding body is provided with a light-suppressing area and a light-transmitting area, which are spaced apart. The first surface of the light-suppressing area and the light-incident surface of the light-transmitting area are located on the light-incident surface of the light-shielding body, and the second surface of the light-suppressing area and the light-exiting surface of the light-transmitting area are located on the light-exiting surface of the light-shielding body. The light-suppressing area is used to suppress the first light ray from incident on the light-incident surface of the light-transmitting body, and the first light ray is the light ray incident on the light-suppressing area. The light-transmitting area transmits a second light ray to the light-incident surface of the light-transmitting body, and the second light ray is the light ray passing through the light-transmitting area.

[0008] In one exemplary embodiment, the dimensions of the light-shielding body satisfy the following formula:

[0009]

[0010] Where h represents the maximum height of the light-shielding body, b represents the width of the light-transmitting area, τ represents the first included angle, θ represents the vertical field of view of the camera device, H represents the installation height of the camera device, L represents the set monitoring distance of the camera device, and α represents the target angle.

[0011] In one exemplary embodiment, the shape of the light-transmitting area includes at least one of the following: elliptical, fan-shaped, or polygonal.

[0012] In one exemplary embodiment, the light-shielding body includes multiple light-shielding areas, and the light transmittance of the multiple light-shielding areas is not exactly the same, or the light transmittance of different light-shielding areas is different.

[0013] In an exemplary embodiment, the light-shielding body includes a substrate and a film deposited on the substrate, wherein the film is provided with a plurality of light-shielding areas, and the ion ratio of the film in the light-shielding areas with different light transmittances is different.

[0014] In one exemplary embodiment, the light-transmitting body includes a lens, and the light-shielding body is attached to the light-incident surface of the lens.

[0015] In one exemplary embodiment, the number of lenses is multiple, and the light-shielding body is attached to the light-incident surface of a portion of the multiple lenses.

[0016] In one exemplary embodiment, the light-transmitting body includes a window, and the light-shielding body is attached to the window.

[0017] In one exemplary embodiment, when the light-shielding body is not attached to the light-transmitting body, the light-shielding body is disposed in the optical path between the light-transmitting body and the sensor.

[0018] The imaging device provided by this utility model includes: a light-transmitting body, a light-shielding body, and a sensor. The light-shielding body is located on the light-incident surface of the light-transmitting body and can suppress light rays incident on the light-transmitting body from a certain target angle. The sensor is set on the light-exiting side of the light-transmitting body and can receive the light rays passing through the light-transmitting body and form an image. Because the light-shielding body can specifically suppress light rays incident at the target angle, thereby reducing halos, it can solve the problem of poor imaging effect of imaging devices in related technologies, thus achieving the technical effect of improving the imaging effect of the imaging device. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of a camera device according to an embodiment of the present utility model;

[0020] Figure 2 This is a detailed structural block diagram of the camera device according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram illustrating the impact of high beams on vehicle headlight monitoring in an embodiment of this utility model.

[0022] Figure 4 This is a schematic diagram of the energy distribution of a car high beam according to an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram illustrating the effect of high beam intensity on camera equipment according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the array-type light-shielding body according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram illustrating the halo suppression principle of the microstructure according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of a sample window for upper transmittance gradient suppression according to an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the principle of the incident light halo suppression camera device in the upper part of an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram illustrating the local light intensity suppression achieved by the wide-angle camera adapter microarray structure according to an embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the energy distribution of a vehicle lamp according to an embodiment of the present utility model;

[0030] Figure 12 This is a diagram showing the relationship between the size parameters of the light-shielding body according to an embodiment of the present invention;

[0031] Figure 13 This is a schematic diagram of the shape of the light-transmitting area according to an embodiment of the present utility model;

[0032] Figure 14 This is a schematic diagram illustrating the principle of different light-blocking areas of the incident angle modulation filter according to an embodiment of the present invention;

[0033] Figure 15 This is a schematic diagram of the incident angle modulation filter principle according to an embodiment of the present utility model;

[0034] Figure 16 This is a schematic diagram showing the relationship between the camera device and the vertical field of view of the camera according to an embodiment of the present utility model. Detailed Implementation

[0035] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0037] This embodiment provides a camera device. Figure 1 This is a structural block diagram of a camera device according to an embodiment of the present utility model, such as... Figure 1 As shown, the device may include:

[0038] Transparent body 102;

[0039] The light-shielding body 104, when attached to the light-transmitting body, is located on the light-incident surface of the light-transmitting body and is used to suppress light rays incident on the light-transmitting body from the target angle;

[0040] Sensor 106 is disposed on the light-emitting side of the light-transmitting body and is used to receive light passing through the light-transmitting body and form an image.

[0041] In the above embodiments, the camera device can be a graphic acquisition device for roadside vehicle monitoring equipment, a graphic acquisition device located in an underground parking garage, or a device with image acquisition and imaging functions. For example... Figure 2 As shown, the light-transmitting body can be a device in a camera that refracts incident light, while the light-shielding body can be an array of surface microstructures or an incident angle modulation filter. The light-shielding body attached to the light-transmitting body can be configured with different suppression schemes for different scenes (incident light rays with different target angles). The sensor can be understood as an imaging sensor, which can be a CCD (Charge Coupled Device), a CMOS (Complementary Metal-Oxide Semiconductor) image sensor, or any other sensor capable of converting the image formed by the imaging system into an electrical signal.

[0042] In the above embodiments, since the target angle of the light incident on the light-transmitting body is different in different scenarios, the target angle can be understood as the angle corresponding to the light energy that can form a halo. For example, in the application scenario model of security monitoring products, the schematic diagram of the impact of high beams in the vehicle headlight monitoring scenario can be found in [reference needed]. Figure 3 ,like Figure 3 As shown, in the energy distribution of vehicle headlights, the high-energy area of ​​the high beam is mainly concentrated in the small-angle region, while the low-energy area is mainly concentrated in the large-angle region. Regarding the image effect captured by the camera, the high-energy area of ​​the high beam presents certain difficulties in suppressing the halo effect, while the low-energy area of ​​the high beam, due to its weak energy, results in a relatively weak halo effect in the image. In this embodiment, a schematic diagram of the energy distribution of the vehicle's high beam can be found [link to schematic diagram]. Figure 4 ,like Figure 4As shown, the arrows represent the energy distribution at different emission angles (relative to the vehicle). The longer the arrow, the greater the energy; the larger the angle between the arrow and 0°, the larger the small angle of the emitted light. Figure 4 The energy distribution of high beams shows that the energy is at its maximum when the headlights are directly facing them, resulting in the highest headlight brightness and a larger halo in the camera. When there is a certain angle between the headlights and the high beams, the energy intensity decreases sharply, the vehicle brightness drops significantly, and the halo in the camera decreases sharply as the angle increases.

[0043] In the above embodiments, the imaging sensor in a typical low-cost camera device does not have a local exposure adjustment function. Under a fixed exposure, the size of the halo around the vehicle at different positions depends on the energy intensity of the headlights in the camera device. A schematic diagram illustrating the effect of high beam intensity on the camera device can be found here. Figure 5 ,like Figure 5 As shown, when the vehicle is at a distance, the camera is located in the high-energy coverage area of ​​the car's high beams, resulting in a high-intensity and large-area halo. As the vehicle moves closer to the camera, its position relative to the vehicle gradually shifts into a large-angle, low-energy coverage area. At this point, a smaller portion of the high beams enters the camera's field of view, resulting in a low-intensity and small-area halo. The angle at which the light emitted from the high-energy area of ​​the high beams is the aforementioned target angle.

[0044] The imaging device provided by this utility model includes: a light-transmitting body, a light-shielding body, and a sensor. The light-shielding body is located on the light-incident surface of the light-transmitting body and can suppress light rays incident on the light-transmitting body from a certain target angle. The sensor is set on the light-exiting side of the light-transmitting body and can receive the light rays passing through the light-transmitting body and form an image. Because the light-shielding body can specifically suppress light rays incident at the target angle, thereby reducing halos, it can solve the problem of poor imaging effect of imaging devices in related technologies, thus achieving the technical effect of improving the imaging effect of the imaging device.

[0045] In an exemplary embodiment, the angle between the light-incident surface and the light-exiting surface of the light-shielding body is a first included angle. The light-shielding body is provided with a light-suppressing area and a light-transmitting area, which are spaced apart. The first surface of the light-suppressing area and the light-incident surface of the light-transmitting area are located on the light-incident surface of the light-shielding body, and the second surface of the light-suppressing area and the light-exiting surface of the light-transmitting area are located on the light-exiting surface of the light-shielding body. The light-suppressing area is used to suppress the first light ray from incident on the light-incident surface of the light-transmitting body, and the first light ray is the light ray incident on the light-suppressing area. The light-transmitting area transmits a second light ray to the light-incident surface of the light-transmitting body, and the second light ray is the light ray passing through the light-transmitting area.

[0046] In the above embodiments, a schematic diagram of the light-shielding body can be found [here]. Figure 6 ,like Figure 6 As shown, the light-incident surface of the light-shielding body is a plane with an inclined angle on the left, and the light-exiting surface is a vertical plane on the right. The angle formed between the two is τ (i.e., the first angle mentioned above). A schematic diagram of the halo suppression principle of the light-shielding body can be found here. Figure 7 ,like Figure 7 As shown, the microstructure can be configured with multiple light-suppressing and light-transmitting areas. Light rays incident on the light-transmitting area (i.e., the effective light in the figure, the aforementioned second ray) can enter the light-incident surface of the light-transmitting body from the light-transmitting area; light rays incident on the light-suppressing area (i.e., the ineffective light in the figure, the aforementioned first ray) are blocked by the light-suppressing area. The light-suppressing and light-transmitting areas can be arranged alternately. The first surface of the light-suppressing area and the light-incident surface of the light-transmitting area can be located on the light-incident surface of the light-blocking body, and the second surface of the light-suppressing area and the light-exiting surface of the light-transmitting area can be located on the light-exiting surface of the light-blocking body.

[0047] In the above embodiments, in the case of large-scene monitoring, distant targets are usually located at the upper edge of the image. Therefore, a microstructure array can be used to uniformly suppress distant light beams in the upper part of the scene. Nearby light entering the camera's imaging sensor mainly consists of low-intensity components, having little impact on the camera's halo effect; therefore, the requirements can be met without adding microarray processing. Since the high-energy high beams that need to be suppressed are usually located in the upper part of the scene, such as... Figure 8 As shown, Figure 8 This is a schematic diagram of the sample window with transmittance gradient suppression in the upper half. Therefore, a microarray structure with a first included angle tilt can be placed in the upper half of the window. A schematic diagram of the incident light halo suppression camera device in the upper half can be found here. Figure 9 As shown in the diagram, a schematic diagram of a wide-angle camera's adaptive microarray structure for achieving local light intensity suppression can be found here. Figure 10 High-energy incident light has significantly reduced energy after passing through the microstructure, while the low-energy light in the lower half remains unchanged. Therefore, it can suppress the halo effect of high beams and also preserve the appearance of low-energy components of nearby headlights to a great extent.

[0048] In one exemplary embodiment, the dimensions of the light-shielding body satisfy the following formula: Where h represents the maximum height of the light-shielding body, b represents the width of the light-transmitting area, τ represents the first included angle, θ represents the vertical field of view of the camera device, H represents the installation height of the camera device, L represents the set monitoring distance of the camera device, and α represents the target angle.

[0049] In the above embodiments, such as Figure 11As shown, when the camera is installed at a height of H, the furthest distance monitored by the camera is L, and the vertical field of view of the camera is θ, according to the upper edge of the field of view of the distant object distance L, the pitch angle β of the camera can be... like Figure 12 As shown, Figure 12 (a) is a diagram showing the relationship between the camera equipment and its installation height. Figure 12 (b) is Figure 12 (a) is an enlarged schematic diagram of the internal light-shielding body of the camera device. When the angle between the incident light rays from the high beam is α (i.e., the target angle mentioned above), the maximum height of the light-shielding body is h, the width of the unit formed by the light-suppressing area and the light-shielding area is b, and the first angle is τ, the following formula can be used to ensure that the light rays at the edge of the field of view can pass through the viewing window normally: in, The relationship with θ can be found in [reference]. Figure 6 Furthermore, to ensure that the edge rays of the headlights' strong glare area are effectively blocked, the high beams can be blocked according to the principle of edge rays in geometric optics. Specifically, b, h, and τ need to satisfy the following formula: b < X / tan(A), where... Right now In summary, to ensure effective utilization of edge light within the field of view and to guarantee effective suppression of distant vehicle headlights, the microstructure aperture width (i.e., the width b of a light-transmitting area), the microstructure height h, and the microstructure tilt angle τ can satisfy the following relationships:

[0050]

[0051] In one exemplary embodiment, the shape of the light-transmitting area includes at least one of the following: elliptical, fan-shaped, or polygonal. In this embodiment, the shape of the light-transmitting region of the microstructure is not limited and can be as follows: Figure 13 The polygonal structure shown can also be an elliptical structure, a fan-shaped structure, a square structure, a rectangular structure, or a honeycomb structure.

[0052] In one exemplary embodiment, the light-shielding body includes multiple light-shielding areas, and the light transmittance of the multiple light-shielding areas is not exactly the same, or the light transmittance of different light-shielding areas is different.

[0053] In the above embodiments, such as Figure 14 As shown, an angle-modulated incident light filter can include multiple shading areas. The transmittance of different shading areas can be adjusted according to the incident light angle of the target in different scenarios (i.e., the transmittance of the shading areas can be different or completely different), and the transmittance characteristics corresponding to the same incident angle on the left and right sides are different, exhibiting an asymmetrical distribution. For example... Figure 15 As shown, Figure 15 This is a schematic diagram of the incident angle modulation filter principle. In scenarios involving high beam suppression (i.e., suppressing the intensity of the upper part of the headlight energy, corresponding to the small-angle high beam in the diagram), the incident light in the upper part of the incident angle modulation filter can be modulated, while the lower part remains fully transparent. In scenarios involving surveillance cameras at high points such as construction sites (i.e., suppressing the intensity of the lower light source), the lower part can be suppressed at a specific incident angle, while the upper part remains fully transparent. Incident angle modulation filters allow for different incident angle suppression schemes to be developed for different application scenarios, and different areas on the same filter can be simultaneously set with different incident angle transmittance suppression states.

[0054] In the above embodiments, taking a high-speed monitoring scenario as an example, please refer to... Figure 11 , Figure 11 The upward arrow indicates the energy distribution of the headlights; the longer the arrow, the greater the headlight energy and the greater the impact on the halo. For the scenario described above, the main focus is on suppressing upward-incident light. When the camera's vertical field of view is β, refer to... Figure 16 Then you can Transmittance is suppressed at the incident angle within the region, where the outermost edge... Within the incident angle range, light transmission can be between 20% and 30%. Starting within the range, the transmittance gradually and uniformly increases with the incident angle. The transmittance can be greater than 99% when incident within the range.

[0055] In an exemplary embodiment, the light-shielding body includes a substrate and a film deposited on the substrate, wherein the film has a plurality of light-shielding regions, and the light-shielding regions with different light transmittances have different ion ratios. In this embodiment, as... Figure 6 As shown, the light-shielding body also includes a substrate, which is connected to the light-emitting surface of the light-shielding body. The film on the substrate can be provided with multiple light-shielding areas. Different incident angles can have different light transmittance performance, which can be achieved by different ratios of coating ions, or by special processes such as microstructures, but is not limited to these.

[0056] In one exemplary embodiment, the light-transmitting body includes a lens, and the light-shielding body is attached to the light-incident surface of the lens. In this embodiment, the light-transmitting body further includes a lens, such as... Figure 2 As shown, the lens can be a lens with a certain optical power, which can be used to modulate the imaging light so that the scene is finally imaged on the imaging sensor. The light-blocking object can also be attached to the light-incident surface of the lens to achieve halo suppression throughout the scene.

[0057] In one exemplary embodiment, the number of lenses is multiple, and the light-shielding body is attached to the light-incident surface of a portion of the lenses. In this embodiment, the lenses may be composed of lens groups, and the controller of the lens group may be a component for moving the lens group, such as a motor, gear, or lead screw, or it may be a fixed-focus lens without a lens controller. The light-shielding body may be attached to the light-incident surface of any one lens in the lens group or to the light-incident surfaces of any number of lenses to achieve halo suppression in the entire scene.

[0058] In one exemplary embodiment, the light-transmitting body includes a window, and the light-shielding body is attached to the window.

[0059] In the above embodiments, such as Figure 2 As shown, the light-transmitting element also includes a front viewing window structure, which can be made of PC, glass, acrylic, or other transparent window materials suitable for front imaging of camera equipment. It serves as both external protection and light transmission, preventing damage from external objects while allowing the internal structure to function normally. The light-shielding element can also be attached to the front viewing window structure to achieve full-scene halo suppression.

[0060] In one exemplary embodiment, when the light-shielding body is not attached to the light-transmitting body, the light-shielding body is disposed in the optical path between the light-transmitting body and the sensor. In this embodiment, see Appendix Figure 2 Furthermore, the light-shielding body can also be placed outside the light-transmitting body on the optical path between the sensor and the light-transmitting body to achieve halo suppression throughout the entire scene.

[0061] In one exemplary embodiment, such as Figure 2 As shown, the camera device can also include hardware circuitry, which can be understood as a circuit system that controls lens movement and processes imaging sensor signals to convert them into images. The camera device can suppress light transmittance by adjusting the light-transmitting area, height, and first included angle of the microarray. This allows for specific light transmittance suppression in automotive lighting scenarios, and even achieves uniform and gradual changes in transmittance across different areas, better adapting to scene characteristics. The incident angle adjustment filter in the camera device has no fixed position; it can be mounted on the front window, within the lens group, or at the filter location to achieve corresponding incident angle suppression. The filter can be inserted as needed through a control system. The incident angle adjustment filter can also adjust different transmittance performance according to different incident angles, with filters in different directions corresponding to different transmittances for different scenes. The light-blocking body can be mounted in different areas of different structures, such as the upper half, lower half, or central partial area.

[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A camera device, characterized in that, include: Transparent body; A light-shielding body, when attached to the light-transmitting body, is located on the light-incident surface of the light-transmitting body and is used to suppress light rays incident on the light-transmitting body from a target angle; A sensor is disposed on the light-emitting side of the light-transmitting body for receiving light passing through the light-transmitting body and forming an image.

2. The camera device according to claim 1, characterized in that, The angle between the light-incident surface and the light-exit surface of the light-shielding body is a first included angle. The light-shielding body is provided with a light-suppressing area and a light-transmitting area, which are spaced apart. The first surface of the light-suppressing area and the light-incident surface of the light-transmitting area are located on the light-incident surface of the light-shielding body, and the second surface of the light-suppressing area and the light-exit surface of the light-transmitting area are located on the light-exit surface of the light-shielding body. The light-suppressing area is used to suppress the first light ray from incident on the light-incident surface of the light-transmitting body. The first light ray is the light ray incident on the light-suppressing area. The light-transmitting area transmits the second light ray to the light-incident surface of the light-transmitting body, and the second light ray is the light ray that passes through the light-transmitting area.

3. The camera device according to claim 2, characterized in that, The dimensions of the light-shielding body satisfy the following formula: Where h represents the maximum height of the light-shielding body, b represents the width of the light-transmitting area, τ represents the first included angle, θ represents the vertical field of view of the camera device, H represents the installation height of the camera device, L represents the set monitoring distance of the camera device, and α represents the target angle.

4. The camera device according to claim 2, characterized in that, The shape of the light-transmitting area includes at least one of the following: elliptical, fan-shaped, or polygonal.

5. The camera device according to claim 1, characterized in that, The light-shielding body includes multiple light-shielding areas, and the light transmittance of the multiple light-shielding areas is not exactly the same, or the light transmittance of different light-shielding areas is different.

6. The camera device according to claim 5, characterized in that, The light-shielding body includes a substrate and a film coated on the substrate. The film has multiple light-shielding areas, and the coating ion ratios of the light-shielding areas with different light transmittances are different.

7. The camera device according to claim 1, characterized in that, The light-transmitting body includes a lens, and the light-shielding body is attached to the light-incident surface of the lens.

8. The camera device according to claim 7, characterized in that, The number of lenses is multiple, and the light-shielding body is attached to the light-incident surface of a portion of the multiple lenses.

9. The camera device according to claim 1, characterized in that, The light-transmitting body includes a viewing window, and the light-blocking body is attached to the viewing window.

10. The camera device according to claim 1, characterized in that, When the light-shielding body is not attached to the light-transmitting body, the light-shielding body is disposed in the optical path between the light-transmitting body and the sensor.

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