Measuring instrument, image, lens_two-dimensional image measuring instrument technology detailed image acquisition CCD lens

In the process of industrial two-dimensional image measurement, the lens is equivalent to human glasses. If there is no lens in the process of industrial visual inspection, then visual inspection cannot be completed. Just like the light source mentioned in the previous article 'Analysis of the Causes of Light Source Affecting Image Measurement ResultsThe bi-telecentric lens used when the ciliary body of the human eye cannot adjust the lens convexity as required, and the commonly called myopia (or hyperopia) will appear, and the scene in front of the eyes will become blurred. Camera and lens When the picture@ becomes unclear, you can adjust the focus of the camera and change the distance between the camera chip and the lens reference plane (equivalent to adjusting the convexity of the human eye lens). The fuzzy picture became 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. 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.