Vision Inspection System, explanation of system elements.
A vision inspection system is a tremendous tool when properly specified. Unlike many measuring and inspection tools, vision inspection requires very precise configuration of the lighting. Further, the optics of the system in terms of magnification, field of view, depth of field and resolution narrow the usage to the inspecting of a particular object.
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The “eye” of the vision inspection system is the CCD camera. In recent years the CMOS camera has made progress for certain applications. The CCD pixels send an analog signal to the frame grabber, which then converts it to a digital format. This requires complex electronics. The CMOS pixels have part of the electronics in each pixel and it sends a digital signal to the frame grabber. This simplifies the electronics of the vision system.
The CCD camera is still preferred for its higher resolution and speed. Either camera can be black & white or color. For high precision and resolution, the B&W camera is preferred.
The vision inspection system has a stage or platform on which the object is placed. The stage can move in the X and Y direction. It can be moved by hand, servo motors or be programmed by a CNC control. Height or Z axis measurements are possible by a laser probe coming through the camera lens.
All vision inspection systems can with a dedicated computer and the required software plus a screen for visual observation