Detailed explanation of the parameters of industrial cameras

Industrial cameras are a key component in machine vision systems. Their most essential function is to convert optical signals into ordered electrical signals. Choosing an appropriate camera is also an important step in the design of a machine vision system. The camera not only directly determines the resolution and quality of the images collected, but is also directly related to the operating mode of the entire system.

1. Resolution:

   The number of pixels (Pixels) of each image collected by the camera. For digital industrial cameras, it generally corresponds directly to the number of pixels of the photoelectric sensor. For analog cameras, it depends on the video format. The PAL system is 768*576 and the NTSC system is 640*480.

2. Pixel Depth:

   The number of bits per pixel of data. 8Bit is commonly used. For digital industrial cameras, there are generally 10Bit, 12Bit, etc.

3. Maximum frame rate (FrameRate)/Line rate (LineRate):

   The rate at which the camera collects and transmits images. For area array cameras, it is generally the number of frames collected per second (Frames/Sec.), and for line array cameras, it is the number of lines collected per second (Hz).

4. Exposure method (Exposure) and shutter speed (Shutter):

   Line array cameras are line-by-line exposure methods. You can choose a fixed line frequency and external trigger synchronization acquisition method. The exposure time can be consistent with the line cycle, or you can set a fixed time; area array industrial cameras have several common methods such as frame exposure, field exposure, and rolling line exposure. Digital industrial cameras generally provide external trigger acquisition functions. The shutter speed can generally reach 10 microseconds, and high-speed industrial cameras can be even faster.

5. PixelSize:

   The pixel size and the number of pixels (resolution) jointly determine the size of the camera target surface. At present, the pixel size of digital industrial cameras is generally 3μm-10μm. Generally, the smaller the pixel size, the more difficult it is to manufacture and the harder it is to improve the image quality.

6. Industrial camera spectral response characteristics (SpectralRange):

   refers to the sensitivity characteristics of the pixel sensor to different light waves. The general response range is 350nm-1000nm. Some cameras add a filter in front of the target to filter out infrared light. If the system needs to be sensitive to infrared light, the filter can be removed.

• From the interface, it is divided into: 1394 interface, usb2.0 interface, camlink interface, lvds interface, gige interface.

It can be seen from the above. CCD is a high-precision automatic dispensing machine and an indispensable part of the glue filling machine. Without CCD, it is difficult to ensure the quality of dispensing of very small products and products that require very high precision.