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.

成像系統中柱狀透鏡起關鍵作用，硬鏡，柱狀透鏡是一組玻璃鏡片，硬鏡膀胱鏡維修，其直徑大小跟硬鏡工作管成正比，硬鏡腎鏡維修，內窺鏡維修，硬鏡直徑越小，透鏡直徑便越小，電子內窺鏡維修，也便越容易損壞。每條硬鏡由5—7組的透鏡組件組成，內窺鏡維修公司，由間環控制整條鏡子的焦距。

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.

圖像故障：模糊、進水、起霧、黑影、灰塵、位置不正。

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

影響---檢查---的常見硬鏡現象有：圖像模糊、圖像起霧、圖像發黑、三分之一圖像、彩虹圖像等等。

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

對于硬管內窺鏡的維修和防護要有專門人員的管理，平時不用時要放在的包裝箱內，關節鏡硬鏡維修，里面有柔軟的海綿或其它軟性材料做防護。在擺放時要擺放整齊，不要交叉重疊的擺放。在運送內窺鏡時，要注意要避免相互的碰撞，應避免過分的顛簸，以免發生擠壓、摩擦、磕碰等損壞情況。

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.