In the field of industrial vision, the camera is the main tool for capturing images, and the selection of its optical size and field of view has a crucial impact on the detection effect. This article introduces the relationship between industrial camera optical size and field of view from the perspective of related concepts, calculation methods, and parameter selection.

　　1. Industrial camera optical size concept and calculation method

　　1) concept
　　Optical Size refers to the size of the light-receiving area of the camera sensor, which is usually expressed in millimeters (mm). The optical size directly affects the resolution and clarity of the image captured by the camera.

　　2) Optical size calculation method
　　The optical size can be calculated using the following formula:
　　Optical Size=(sensor physical size×resolution)/image height
　　Among them, the physical size of the sensor refers to the actual size of the camera sensor, the resolution refers to the number of pixels of the camera sensor, and the image height refers to the number of pixels in the vertical direction of the image captured by the camera.

　　2. Concept and calculation method for industrial camera field of view

　　1) Concept of the field of view
　　The field of view refers to the size of the image area that the camera can capture and is usually expressed as an angle. The size of the field of view indicates the area that the camera can cover during visual inspection.

　　2) Calculation method for the field of view range
　　The field of view can be calculated using the following formula:
　　Field of view = focal length of objective lens × field of view (FOV) / physical size of sensor × resolution
　　Among them, the focal length of the objective lens refers to the distance from the camera lens to the imaging plane, the field of view (FOV) refers to the sum of the angles that the camera can observe in the horizontal and vertical directions, and the physical size and resolution of the sensor are the same as above.

　　3. Choosing the appropriate optical size and field of view parameters for industrial cameras
　　1) Select the appropriate optical size and field of view parameters according to the characteristics of the detection target. For example, for small object detection tasks that require precise positioning, you can choose a smaller optical size and a larger field of view; for application scenarios that require detection of large-area objects, you can choose a larger optical size and a smaller field of view. scope.
　　2) In actual applications, the appropriate optical size and field of view range parameters can be identified through simulation software or actual testing. Simulation software can help users quickly estimate performance under different parameters and make optimized choices; actual testing can more accurately evaluate the camera’s performance in actual working environments.
　　3) When selecting optical size and field of view range parameters, cost factors must also be considered. In general, a larger optical size and field of view will increase the cost and complexity of the camera; therefore, there needs to be a trade-off between the performance requirements and the cost budget.

　　The optical size and field of view of industrial cameras are key parameters that affect visual inspection results. When selecting appropriate parameters, it is necessary to comprehensively consider the characteristics of the detection target, the actual application environment, and cost factors to ensure that the camera can achieve the finest detection effect.

　　Summary: A close relationship exists between the two parameters of optical size and field of view. By optimizing these two parameters, we can not only improve the quality and clarity of the image but also expand the scope of detection, thereby improving production efficiency and product quality.