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Industrial cameras are crucial components in machine vision systems, typically installed on assembly lines to replace human eyes for measurements and judgments. Selecting the appropriate camera is a key aspect of machine vision system design. So, how do you choose the right industrial camera? And what considerations should you keep in mind when selecting industrial camera lenses? Let's find out together.
How to Choose the Right Industrial Camera
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Choose Between CCD or CMOS Cameras Based on Application:
CCD industrial cameras are primarily used for extracting images of moving objects. However, with the advancement of CMOS technology, many applications, including vision automatic inspection solutions, are increasingly adopting CMOS industrial cameras due to their lower cost and power consumption.
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Resolution Selection:
Consider the precision of the objects being observed or measured when selecting resolution. The pixel accuracy of a camera can be calculated as follows: Camera Pixel Accuracy = Single-direction Field of View Size / Camera Single-direction Resolution. For example, if the single field of view is 5mm long and the theoretical precision is 0.02mm, then the single-direction resolution would be 5/0.02=250. However, for increased system stability, it's advisable to choose a resolution that is four times or higher than the required precision. For instance, if the camera requires a single-direction resolution of 1000, a 1.3-megapixel camera would suffice.
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Frame Rate Selection:
When the objects being measured require motion, opt for an industrial camera with a higher frame rate. However, it's important to note that higher resolutions typically result in lower frame rates.
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Compatibility with Lenses:
Ensure that the sensor chip size is smaller than or equal to the lens size, and that the C or CS mounting brackets are compatible.
When selecting industrial camera lenses, pay attention to the following:
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C Interface or CS Interface:
The C interface has an interface distance of 17.5mm, while the CS interface has a distance of 12.5mm. Choose the appropriate interface based on your requirements to ensure proper focus.
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Sensor Device Size:
Choose a lens based on the size of the sensor device to avoid significant vignetting when using a lens designed for a larger sensor.
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Focal Length Selection:
Select a focal length that provides a slightly larger field of view than the observation range.
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Depth of Field and Lighting Environment:
In well-lit environments, smaller apertures can be used to increase depth of field and enhance image clarity. Conversely, in low-light conditions, slightly larger apertures or high-sensitivity sensors should be considered.
These are the methods for choosing the right industrial camera and considerations for selecting industrial camera lenses. We hope this information is helpful to you. Remember, the choice of camera not only determines factors like image resolution and quality but also directly affects the operation of the entire system. Therefore, careful consideration is required when making a purchase.
FALenses Technology specializes in providing machine vision core hardware. You can go to the official website of FALenses Technology at https://www.falenses.com/ for more information.