CN204795321U - Camera and device of jiao's adjustment thereafter with burnt adjustment device in back - Google Patents

Abstract

The utility model provides a video camera with a back focus adjustment device and the back focus adjustment device. The camera includes: a sensor, a sensor base, a lens mounting base, and a back focus adjustment device, the sensor is installed on the sensor base, and the back focus adjustment device is installed on the lens installation base and the back focus adjustment device Between the sensor bases, the back focus adjustment device has a first side arm, a second side arm and a connecting arm, and the first side arm is connected to the second side arm through the connecting arm. The utility model achieves the purpose of back focus adjustment through simple back focus adjustment devices of different specifications, so that the same lens mounting base can be equipped with multiple sensors, and can ensure the parallelism of sensor installation, saving the back focus debugging process. And the installation is firm, the debugging is convenient, and the anti-vibration performance is good.

Description

Camera with back focus adjustment device and back focus adjustment device

technical field

The utility model relates to the field of imaging equipment, in particular to a focusing device used in industrial cameras.

Background technique

At present, with the development of industry, the application of machine vision is becoming more and more extensive. In the field of machine vision, cameras are one of the most commonly used devices. When designing the mechanical mechanism of a camera, people often hope to be compatible with multiple sensors, which is conducive to reducing design and manufacturing costs, and is also more conducive to the stable operation of the camera. The focal planes of different sensors are usually not at the same position, so a back focus adjustment device is required to adjust the focal planes of these sensors to the same position to adapt to the standard lens.

The existing back focus adjustment is realized through a complex gear mechanism or a bevel device, which is troublesome to install and debug. Most of the fastening methods are side screw thimbles, which may easily cause the lens mounting interface to be eccentric. The application environment of industrial cameras has high requirements for sensor installation parallelism and anti-vibration characteristics, and the above methods have shortcomings.

Patent application 2014205077118.9 discloses a camera lens with adjustable back focus, which is provided with a back focus adjustment mechanism between the lens body and the target surface to adjust the distance between the lens and the target surface, including an interface, an interface connection seat, a guide Nails, tuning rings, bases. Through these structures, the back focus adjustment mechanism in this patent application can realize the distance between the camera lens body and the target surface.

The back focus adjustment mechanism has a complicated structure and many parts, and once there is an error in the installation of two parts during the installation process, the overall performance will be unstable. Moreover, since industrial cameras have high requirements for long-term and stable work, this rear focus adjustment structure is not very suitable for use in industrial cameras.

Utility model content

In view of the above problems, the utility model hopes to provide a camera, which adopts a back focus adjustment device with a simple structure and convenient operation, so that the industrial camera can adapt to different focal length requirements. In addition, the utility model also provides a set of back focus adjustment devices for cameras.

Specifically, the utility model provides a camera with a back focus adjustment device, which is characterized in that the camera includes: a sensor, a sensor base, a lens mounting base, and a back focus adjustment device, and the sensor is installed on the on the sensor base, and the back focus adjustment device is installed between the lens mounting base and the sensor base,

The back focus adjusting device has a first side arm, a second side arm and a connecting arm, and the first side arm is connected to the second side arm through the connecting arm.

In a preferred implementation manner, the three arms of the sensor back focus adjustment device form a substantially C-shaped structure.

In a preferred implementation manner, the first end of the first side arm is connected to the connecting arm, the second end is suspended in the air, and the two ends of the first side arm respectively have a semicircular installation with an opening outward. hole; the first end of the second side arm is connected to the connecting arm, the second end is suspended in the air, and the two ends of the second side arm also respectively have a semicircular mounting hole opening outward.

In a preferred implementation manner, the lens mounting base and the sensor base are fixed by four bolts, and the positions of the four semicircular mounting holes on the first side arm and the second side arm are Match the position and spacing of the four bolts.

In a preferred implementation manner, the camera has several back focus adjustment devices with different thicknesses, and one or more back focus adjustment devices are installed in the camera at a time.

In a preferred implementation manner, the thickness of the back focus adjustment device is 1mm, 0.75mm, 0.6mm, 0.5mm or 0.25mm.

On the other hand, the utility model provides a back focus adjustment device for a camera, wherein each of the back focus adjustment devices is used to be installed between the lens of the camera and the sensor base, each of the back focus The thicknesses of the adjustment devices are different from each other, and each of the back focus adjustment devices includes a first side arm, a second side arm and a connecting arm, and the connecting arm is respectively connected to the first side arm and the second side arm.

In a preferred implementation manner, the three arms of each back focus adjustment device form a substantially C-shaped structure.

In a preferred implementation manner, the first end of the first side arm is connected to the connecting arm, the second end is suspended in the air, and the two ends of the first side arm respectively have a semicircular installation with an opening outward. hole; the first end of the second side arm is connected to the connecting arm, the second end is suspended in the air, and the two ends of the second side arm also respectively have a semicircular mounting hole opening outward.

The back focus adjustment device of the utility model is mainly used in small industrial cameras, which have the characteristics of miniaturization, and the lens interface is a fixed C interface or CS interface. For a fixed lens interface, it is often required that the same lens mounting base needs to be compatible with multiple sensors. The focal planes of these sensors are not at the same position. A device is required to adjust their focal planes to the same position. At the same time, it is necessary to ensure the sensor’s focal plane Parallelism, firm installation, easy installation and debugging.

The back focus adjusting device of the present utility model and the camera installed with it have the following advantages:

1) The back focus can be adjusted, and the same lens mounting base is compatible with a variety of sensors.

2) Improve the parallelism accuracy of sensor installation,

3) Simple installation and debugging, no debugging for mass production,

4) The installation is firm, the anti-vibration performance is good,

5) It is beneficial to the heat dissipation of the sensor.

Description of drawings

Below in conjunction with accompanying drawing of the utility model, the specific embodiment of the utility model is described in detail:

FIG. 1 is a schematic structural view of the main parts of a video camera according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of disassembly of main parts of a camera according to an embodiment of the present invention;

Fig. 3 is the front view of the back focus adjusting device adopted in an embodiment according to the present invention;

Fig. 4 is a perspective view of a back focus adjustment device used in an embodiment of the present invention.

Reference signs:

1: Lens mounting base;

2: back focus adjustment device;

3: Sensor mounting base;

4: sensor;

5. Sensor focal plane

21, 22: side arm;

23: connecting arm;

24, 25, 26, 27: Mounting holes

Detailed ways

As shown in FIG. 1 , in this embodiment, the camera includes: a lens mounting base 1 , a back focus adjustment device 2 , a sensor mounting base 3 , a sensor 4 , a circuit board, and a data output interface. In the present embodiment, parts irrelevant to the inventive point of the present utility model are omitted, and only the sensor, the sensor base, the rear focus adjustment device, and the lens mounting base (commonly known as the front face) are shown in Fig. 1 . A lens may be mounted on the lens mounting base. However, the improvements of the present invention have nothing to do with the lens.

As shown in Figures 1-4, in this embodiment, the sensor base 3 adopts a PCB fixing board, and the sensor 4 is welded on the surface of the PCB board, and the welding position accuracy and parallelism are guaranteed by the welding process. The flatness of the PCB board itself is guaranteed by the board making process. The lens mounting base 1 and the PCB fixing plate 3 are fixed to each other by four screws, and a back focus adjustment device 2 of a certain thickness is arranged between them. Furthermore, the distance between the PCB fixing plate 3 and the lens mounting base 1 can be adjusted by the back focus adjusting device 2 .

As shown in FIG. 3 and FIG. 4 , the structure of the rear focus adjustment device 2 is generally in a right-angled C-shape, consisting of two side arms 21 , 22 and a connecting arm 23 . As shown in the figure, a semicircular or arch-shaped mounting hole 24 is formed on the outside of the upper end of the side arm 21 , and the corresponding side wall 21 is bent inward at its upper portion. The lower end of the similar side arm 21 also has a similar mounting hole 25 . Both the mounting holes 24 and 25 are towards the outside of the C-shaped back focus adjustment device. The structure of the side arm 22 is similar to that of the side wall 21, except that it is a mirror image of it, and two mounting holes 26, 27 are formed on the outside. The four mounting holes of the back focus adjusting device 2 correspond to the four screw holes of the camera lens mounting base 1 and the PCB fixing plate 3 one by one. The installation and disassembly of the back focus adjusting device of this special structure are extremely convenient.

During use, for the same type of lens mounting base, the parameters of all the sensors to be used on the base will be summarized, and the designer will conduct theoretical calculation and actual measurement verification to determine the size of the back focus adjustment device corresponding to each sensor , during mass production, production personnel match the sensor and the back focus adjustment device according to the corresponding table. Back focus adjustment devices with different thickness specifications correspond to different sensors, and the thickness error and flatness of the back focus adjustment device depend on the material and stamping process of the copper sheet.

When the camera of the present invention needs to be applied to a specific application scene, the thickness of the back focus adjustment device corresponding to the sensor can be determined according to the parameters of the sensor required by the application. Then, the sensor is installed on the PCB board, and the corresponding back focus adjustment device is selected and installed between the PCB board and the lens installation base to match the corresponding sensor. Once installed, the camera does not require further adjustments, the sensor and lens are matched.

In summary, the utility model achieves the purpose of back focus adjustment through simple back focus adjustment devices of different specifications, so that the same lens mounting base can be equipped with a variety of sensors, and can ensure the parallelism of sensor installation. When it is necessary to perform imaging of different scenes, the thickness of the back focus adjustment device that enables the sensor to image clearly is determined through theoretical calculation and actual commissioning, and the processing accuracy of the metal gasket is guaranteed through the process, so that the back of the same specification is used in mass production Focus adjustment device, eliminating the need for back focus adjustment steps.

The back focus adjustment device and the corresponding camera of the utility model can realize that the same lens mounting base is compatible with multiple sensors whose focal planes are not at the same position, can ensure the parallelism accuracy of the sensor installation, secure installation, convenient debugging, and good anti-vibration performance.

It should be noted that the shape of each component in the accompanying drawings of the utility model is schematic, and it is not ruled out that there are certain differences between them and their real shapes. The accompanying drawings are only used to illustrate the principle of the utility model, as shown in the figure The specific details of the components are not intended to limit the protection scope of the utility model. Those skilled in the art should also understand that the above-mentioned embodiments are only explanations of exemplary implementations of the present utility model, and are not intended to limit the scope of the present utility model.

Claims (9)

1. A camera with a back focus adjustment device, characterized in that the camera includes: a sensor, a sensor base, a lens mounting base, a back focus adjustment device, and the sensor is installed on the sensor base, and , the back focus adjustment device is installed between the lens mounting base and the sensor base, The back focus adjusting device has a first side arm, a second side arm and a connecting arm, and the first side arm is connected to the second side arm through the connecting arm. 2. The video camera with back focus adjusting device according to claim 1, characterized in that, The three arms of the sensor back focus adjustment device form a substantially C-shaped structure. 3. The video camera with back focus adjusting device according to claim 1, characterized in that, The first end of the first side arm is connected to the connecting arm, and the second end is suspended in the air, and the two ends of the first side arm respectively have a semicircular mounting hole opening outward; the second side arm The first end of the second side arm is connected to the connecting arm, the second end is suspended, and the two ends of the second side arm also respectively have a semicircular mounting hole opening outward. 4. The video camera with back focus adjusting device according to claim 3, characterized in that, The lens mounting base and the sensor base are fixed by four bolts, and the positions and spacing of the four semicircular mounting holes on the first side arm and the second side arm are the same as those of the four bolts. The position and spacing match. 5. The video camera with back focus adjusting device according to claim 1, characterized in that, The camera has several back focus adjustment devices with different thicknesses, and the camera is equipped with one or more back focus adjustment devices at a time. 6. The video camera with back focus adjustment device according to claim 1, characterized in that, The thickness dimension of the back focus adjustment device is: 1mm, 0.75mm, 0.6mm, 0.5mm or 0.25mm. 7. The back focus adjustment device for video camera, it is characterized in that, each of the back focus adjustment devices is used to be installed between the lens mounting base and the sensor base of a video camera, each of the back focus adjustment The thicknesses of the devices are different from each other, and each of the back focus adjustment devices includes a first side arm, a second side arm and a connecting arm, and the connecting arm is respectively connected to the first side arm and the second side arm. 8. The back focus adjustment device according to claim 7, characterized in that, The three arms of each back focus adjusting device form a substantially C-shaped structure. 9. The back focus adjustment device according to claim 8, characterized in that, The first end of the first side arm is connected to the connecting arm, and the second end is suspended in the air, and the two ends of the first side arm respectively have a semicircular mounting hole opening outward; the second side arm The first end of the second side arm is connected to the connecting arm, the second end is suspended, and the two ends of the second side arm also respectively have a semicircular mounting hole opening outward.