Optical fiber connection technology into two categories, one kind is a permanent connection, often called the fixed joint, die joint; One kind is removable activities connection, often called the live joint, need to use optical fiber connectors. In transmission network, the connection between the fiber optic cable with permanent connections, and optical fiber connectors main used to implement the system between equipment, equipment and instrument, equipment and optical fiber between between and the optical fiber and optical fiber of permanent connection between the fixed, it is the most common optical communication system and usage of the largest basic passive device.

   Because ceramic material and quartz fiber is of good heat matching, physical and chemical properties and ceramic core stability in the core component of the optical fiber connectors get the very quick development. The world ceramic core in almost all the Japanese manufacturers, China's relevant production scientific research institutes in ceramic core products into although development and related manufacturing technology research had made some breakthrough, but in quality, reliability and stability compared with foreign countries still, there are some gap has yet to be developed for ceramic core manufacturing in the proprietary technology and equipment, so every will cost a lot in foreign exchange purchase ceramics core or introducing complete set production equipment. Domestic has put into production of several large ceramic core production manufacturer in the production technology, raw materials and equipment are introduced from abroad, does not have the complete set their own products and equipment development capabilities.

   By machining process, batch of grinding out influence in the ceramic core casing outside circle diameter, hole diameter is large, and there will be a certain ZhenYuanDu and concentricity of these parameters, directly determine the product quality, therefore, the core of ceramic into these parameters is very necessary.

   With ceramic core manufacturing technology in similar, optical fiber connectors the detection of the technology is also Japan and other developed countries is in the lead.

   At present, the optical fiber communication in China has set up a file in application. The relevant departments of the state has to declare it in the future in China focus on the development of high-tech industries. Therefore, it is expected that the usage of the optical fiber connectors in our country in the future will be more and more each day.

   But now, most of the research in our country is optical fiber connectors of end testing, the optical fiber ceramic inserted the geometric parameters measurement of core technology, is relatively backward. As for the inner diameter test, the domestic is generally used artificial detection method, respectively for different diameter steel wire insert in the hole, to find the most suitable diameter to determine the size of the hole, this method can't test the ZhenYuanDu hole. The detection is using artificial concentricity feeding, rotate into a display screen, core observation of the image of the position and to determine concentricity fluctuations. To ZhenYuanDu measured by hardness strong steel insert into the core and sophisticated end, rotate inserted before the core, in steel with displacement sensor record at the tip of the steel fluctuates up and down, concurrent displacement to the PC, inserted within core hole calculation ZhenYuanDu. Above these detection method error detection efficiency, that low, and does not apply to batch test.

   Therefore, the domestic manufacturers need to develop with independent technology in the ceramic core testing equipment, which can reduce the production cost, but also to overcome the dependence of foreign products.