Electronic endoscope (endoscopy) is a kind of medical electronic optical instrument that can be inserted into the human body cavity and the internal cavity of organs for direct observation, diagnosis, and treatment, which integrates optical, mechanical, and electrical high-precision technologies. It uses a very small size of the electronic imaging element - CCD (charge-coupled device), will be observed in the cavity object through the tiny optical system of the objective lens imaging to the CCD, and then through the guide fiber bundles will be received by the image signal sent to the image processing system, and finally in the monitor output processed images, for doctors to observe and diagnosis.
Electronic endoscopes are divided into electronic gastroscope, electronic duodenoscope and electronic colonoscope as fiber endoscopes. In recent years, the development is very fast, but due to the electronic endoscope is expensive, the production process is not as mature as fiber endoscopy, in a certain period of time, it is still difficult to popularize and replace the clinical application of fiber endoscopy. Electronic endoscopes are mainly used for non-destructive testing and borehole detection technology applications, therefore, they are mainly divided into industrial electronic endoscopes and medical electronic endoscopes. There is basically no majority difference in the endoscope mechanical structure and working principle.
Medical endoscopes are directly used to observe the tissue morphology of human internal organs and improve the accuracy of diagnosis. With the development of science and technology, all kinds of advanced science and technology are infiltrating into medicine, microelectronics, computer technology, ultrasound technology, automation technology makes medical endoscopes develop, and all kinds of endoscopes are produced one after another, and their functions are constantly expanding, and they become series products integrating checking, diagnosis, treatment and surgery.
At present, the developed countries are vigorously carrying out the application development of endoscopy, and the well-known brands in the international market are Japan Olympus, the United States Yalun (Welch Allyn), Germany Karl storzhe Richard Wolf and the United Kingdom Ultralfine, etc. The development of China's endoscopic technology is relatively simple. China's endoscopic technology development is relatively late, the overall technical level and the world level difference of nearly 15 years. The main domestic manufacturers are Shanghai Medical Optical Instrument Factory, Shanghai Medical Diagnostic Instrument Factory, Shanghai Medical Instrument Factory, Shenda Endoscope Co.