Image acquisition CCD lens explained in detail of 2D image measuring instrument technology.

In the process of industrial 2D image measurement, the lens is equivalent to human eyes. If there is no lens in the process of industrial visual inspection, then the visual inspection cannot be completed. As mentioned in the previous article "Analysis of the Causes of Light Sources Affecting Image Measurement Results", the light source is very important to image measurement, and the lens is also very important in measurement, which is an important part of the image measuring instrument.

When the ciliary body of the human eye cannot adjust the convexity of the lens as required, what is often called myopia (or hyperopia) will appear, and the scene in front of you will become blurred. When the image becomes unclear, you can adjust the focus of the camera, and change the distance between the camera chip and the reference plane of the lens (equivalent to adjusting the convexity of the human eye lens), which can make the blurry picture clear. .

From this we know that the main function of the optical lens is to focus the optical image of the scene on the photosensitive array of the image sensor. All image information processed by the vision system is obtained through the lens, and the quality of the lens directly affects the overall performance of the vision system, so it is necessary to introduce the knowledge of optical lenses.