Hard tube endoscope consists of two parts, imaging system and light guide system. The imaging system includes: objective lens system, cylindrical lens and eyepiece system; The main components of the light guide system are optical fibers. The optical fiber and working tube are semi-finished products. If the optical fiber is damaged by more than 20%, the optical fiber and working tube of the mirror need to be replaced.

成像系统中柱状透镜起关键作用，硬镜，柱状透镜是一组玻璃镜片，硬镜膀胱镜维修，其直径大小跟硬镜工作管成正比，硬镜肾镜维修，内窥镜维修，硬镜直径越小，透镜直径便越小，电子内窥镜维修，也便越容易损坏。每条硬镜由5—7组的透镜组件组成，内窥镜维修公司，由间环控制整条镜子的焦距。

The cylindrical lens plays a key role in the imaging system. The hard mirror and cylindrical lens are a group of glass lenses. The diameter of the hard mirror cystoscope is directly proportional to the working tube of the hard mirror. The smaller the diameter of the hard mirror, the smaller the lens diameter, and the easier it is to damage the maintenance price of the electronic endoscope. Each hard mirror is composed of 5-7 groups of lens components. The endoscope maintenance company controls the focal length of the whole mirror by the intermediate ring.

图像故障：模糊、进水、起雾、黑影、灰尘、位置不正。

Image fault: blur, water ingress, fog, shadow, dust, incorrect position.

影响---检查---的常见硬镜现象有：图像模糊、图像起雾、图像发黑、三分之一图像、彩虹图像等等。

Common hard mirror phenomena affecting inspection include image blur, image fogging, image blackening, one-third image, rainbow image, etc.

对于硬管内窥镜的维修和防护要有专门人员的管理，平时不用时要放在的包装箱内，关节镜硬镜维修，里面有柔软的海绵或其它软性材料做防护。在摆放时要摆放整齐，不要交叉重叠的摆放。在运送内窥镜时，要注意要避免相互的碰撞，应避免过分的颠簸，以免发生挤压、摩擦、磕碰等损坏情况。

The maintenance and protection of rigid tube endoscope shall be managed by special personnel. It shall be placed in the packaging box when not in use. There shall be soft sponge or other soft materials for protection in the maintenance of rigid arthroscopy. It shall be placed neatly without overlapping. When transporting the endoscope, pay attention to avoid mutual collision and excessive bumping, so as to avoid extrusion, friction, bump and other damage.