In the design and implementation of the machine vision system, the lens as the key front-end component of image acquisition, its selection directly affects the system's imaging quality, detection accuracy and scope of application. Different types of industrial lenses have unique optical characteristics and applicable scenes.

  1. Fixed-focus Lens：Fixed focal length, suitable for scenes where the detection position is fixed and the field of view is unchanged (e.g. electronic component solder joint detection).

  2.Varifocal Lens：Adjustable focal length, suitable for scenes that require flexible switching of the field of view range (e.g., assembly line multi-specification product inspection).

  3.Telecentric Lens：Divided into object-side telecentricity, image-side telecentricity and dual-side telecentricity, they are characterized by large depth of field and low aberration, and are mainly used for high-precision measurements (e.g., semiconductor wafer size inspection).

  4.Zoom Lens：The magnification is changed by mechanical adjustment, which is suitable for the scenarios that require dynamic adjustment of inspection accuracy (e.g. multi-angle inspection of automotive parts).

  5.Macro Lens：Close-up high-definition imaging for inspection of small objects (e.g. PCB board solder joints, insect specimen observation).