AOI system integration technology involves key components, system design, machine integration, software development and so on. The essential key components in AOI system include image sensor (camera), lens, light source, acquisition and pretreatment card, computer (industrial computer, server), etc. The image sensor is most commonly used in various types of CMOS/CCD cameras. The combination of image sensor, lens and light source constitutes the perception unit in most automatic optical detection systems. The selection and configuration of devices need to be designed and selected according to the detection requirements.

The selection of light source (color, wavelength, power, illumination mode, etc.) should not only distinguish and enhance features, but also consider the sensitivity range of image sensor to light source spectrum. Lens selection needs to consider the field of view Angle, depth of field, resolution and other optical parameters, the optical resolution of the lens should match the spatial resolution of the image sensor to achieve the best cost performance. In general, the optical resolution of the lens is slightly higher than the spatial resolution of the image sensor, and the black-and-white camera is used as far as possible to improve the imaging resolution. The image sensor (camera) adopts plane array or line array according to the specific situation, the selection of factors need to be considered include imaging field of view, spatial resolution, minimum exposure time, frame rate, data bandwidth, etc.

For the detection of moving objects, we should consider the adverse effects of motion blur, calculate the minimum exposure time of motion blur, and determine the model of image sensor. The exposure time of the image sensor should be less than the minimum exposure time leading to motion blur. The global shutter mode should be selected for fast exposure, but it is not easy to adopt the shutter mode at high speed. In order to obtain the best SNR, the gain of the image sensor should be as much as possible as 1, and the increase in image brightness should be compensated by the energy (power) of the light source, or the aperture of the lens should be increased without affecting the available imaging depth of field.

In the system integration, the support mode of the tested part, the precision transmission and positioning device must also be carefully designed, which involves the precision mechanical design technology, which is very important for the automatic optical detection system in the precision manufacturing and assembly industry such as flat panel display, silicon chip, semiconductor and MEMS. In these areas, the manufacturing process is usually between super net, automatic optical inspection system has the very high self-cleaning ability, the material selection of system components, pneumatic and automation equipment selection, sports guide the design and components selection has strict requirements, production environment especially the measured workpiece itself not bring secondary pollution.

In particular, AOI systems used for surface defect detection cannot bring defects (such as dust, scratches, static electricity, etc.) to the surface of the tested parts during the inspection process. Thus, for large parts (such as high generation of LCD glass, silicon, etc.) of the online detection, often need to take air bearing support, positioning, and the transmission mechanism, the moving parts (such as bearing, etc.) using self lubricating device, and the use of head fan filter units to environmental purification, detection system and adopt static elimination equipment, anti-static processing of workpiece.