FOV (Field of Vision) = required sub-pixel resolution * * Camera Size / PRTM (parts measuring tolerance ratio) lens selection should noted: ① ② focal length of the image height target height ③ ④ ⑤ image magnification of the distance to the center of the target ⑥ Point / Node ⑦ distortion visual inspection to determine how to choose the right lens focal length lens for specific industry applications must consider the following factors: - View - is the size of the imaging area. · Working distance (WD) - the camera lens and the object being observed or the distance between the regions. · CCD - size camera imaging sensor device. (2) a fine nozzle mold: runner and gate are not parting line, usually directly on the product, mold surveillance, so to design a set of multi-outlet parting line, mold monitoring apparatus design is more complex, more difficult process, generally depending on the product requirements and selection of fine nozzle system. Fine nozzle fixed mold mold generally consists of three steel plates such structures it is also called the mold of "three plate mold." Three-plate mold is fine nozzle mold simplest structure. Mould monitoring device, Sheng Ding equipment (certified), mold monitoring provided by the Dongguan City Ding Sheng Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) (www.dgshengding.com) Dongguan, Guangdong, dedicated instrumentation leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Sheng Ding instrument in leadership with the staff warmly welcome all inquiries negotiations to create Shengding instrument better future.