The working principle of medical fiber endoscope is that the image is transmitted by high quality image transmitting fiber, which is directly investigated by eyepiece. The fiberscope consists of an insertion part (front end part, zigzag part and soft part), an operation part and an eyepiece part. The image fiber bundle, optical fiber and steel wire for adjusting the front end swing angle are all built-in, and are equipped with a special cold light source. Next, I'll share it with you from the small edition of endoscope equipment maintenance.

　　1.纖維內窺鏡頭部

　　1. fiber endoscope lens

　　頭部是軟性內窺鏡靠前端呈硬性的一小段，它有側視式、前視式二種。

　　The head is a small hard segment of the soft endoscope near the front end. It has two types: side view type and front view type.

　　側視式：它是指調查和效果部位坐落旁邊面，常用來調查內壁有無缺陷；

　　Side view type: it refers to the investigation and effect of the part located on the side surface, commonly used to investigate whether the inner wall is defective;

　　前視式：它的調查窗在前方，常用來調查前方有無異物。

　　Forward looking type: its investigation window is in front, which is often used to investigate whether there is foreign body in front.

　　不論哪種形式，頭部都包含：

　　Either way, the head contains:

　　a)纖維內窺鏡 光孔：光導纖維將外部照明光導入，由此孔射出，照亮調查部位；

　　a) Fiber endoscope light hole: the optical fiber leads in the external illumination light, from which the light is emitted to illuminate the investigated part;

　　b)物鏡孔：此處裝有保護玻璃及物鏡、導像纖維束的端部，棱鏡等。物鏡常用固定焦點式，使用中不再調焦，結構可簡單些。為加大景深，選用短焦距，如f′可為3～6mm，視場角為40°～60°，調查距為3～100mm。調查距小時，放大倍率較大而視場較小。也有選用調焦式的，調查效果好些，但結構和操作要雜亂些。

　　b) Objective hole: there are protective glass, ends of objective lens and image fiber bundle, prism, etc. The objective lens is usually fixed focus type, no longer focusing in use, and the structure can be simpler. In order to increase the depth of field, short focal length is selected. For example, f ′ can be 3-6mm, field angle is 40 ° - 60 °, and survey distance is 3-100mm. When the survey distance is small, the magnification is large and the field of view is small. There are also focussed ones, which have better investigation results, but the structure and operation should be disordered.

　　2.纖維內窺鏡曲折部

　　2. Zigzag part of fiberscope

　　其效果為使頭部能上下、左右活動，以增加調查區域、消除盲區。要求曲折的角度盡量大、曲折的半徑盡量小，曲折段的長度也盡量小。對前視式，要求曲折的角度達180°；而對側視式，則要求90°即可；

　　Its effect is to enable the head to move up and down, left and right, so as to increase the investigation area and eliminate the blind area. It is required that the angle of twists and turns should be as large as possible, the radius of twists and turns should be as small as possible, and the length of twists and turns should be as small as possible. For the forward-looking type, the zigzag angle is required to be 180 °; for the side-looking type, 90 ° is required;

　　曲折部內有導光纖維、導像纖維、各種通道以及牽引設備。

　　There are optical fiber, image fiber, various channels and traction equipment in the zigzag part.

　　曲折選用鋼絲牽引的方式，頭部有四根鋼絲連向操控部。扭動操控部的手輪，即可別離拉動不同的鋼絲繩，使頭部向相應的方向搖擺。

　　Zigzag selection of steel wire traction mode, the head has four steel wires connected to the control part. Twist the hand wheel of the control part to separate and pull different wire ropes, so that the head swings in the corresponding direction.

　　曲折部的外層為蛇皮形套管。要求柔軟、撓性好，頭部及軟管部結合結實，密封好。

　　The outer layer of the zigzag part is serpentine casing. It is required to be soft and flexible, and the head and hose part shall be combined firmly and sealed well.

　　3. 纖維內窺鏡軟管部

　　3. Fiberscope hose

　　軟管部是表現整個內窺鏡長度的部分。裝有導光束、導像束、牽引鋼絲等，外包不銹鋼帶軟管及金屬網管。

　　The hose part is the part representing the whole length of the endoscope. Equipped with beam guide, image guide, traction wire, etc., wrapped with stainless steel hose and metal network management.

　　4.纖維內窺鏡操控部

　　4. Fiber endoscope control department

　　操控部是進行操作操控和調查的部位。包含目鏡、導光束連接口、頭部曲折操控鈕等。要求重量輕、操作靈敏、可靠。

　　The control department is the place for operation control and investigation. Including eyepiece, guide beam connector, head zigzag control button, etc. Light weight, sensitive and reliable operation are required.

　　對目鏡，要求有足夠的視界、明晰并有屈光調節。通常光導纖維傳像為1:1，因此內窺鏡的總放大率取決于物鏡和目鏡。

　　For eyepiece, it is required to have enough visual field, clarity and refractive adjustment. Generally, the image transmission of optical fiber is 1:1, so the total magnification of endoscope depends on the objective and eyepiece.

　　5.導光纜

　　5. Optical cable

　　纖維內窺鏡的導光纜用以連接光源和內窺鏡。

　　The fiber endoscope's guide cable is used to connect the light source and the endoscope.

　　以上是對醫用纖維式內窺鏡工作原理的詳細介紹，由內窺鏡設備維修友情分享，想要了解更多歡迎咨詢網站http://www.cnxgtzyj.cn。

　　The above is a detailed introduction to the working principle of medical fiber endoscope, which is shared by endoscope equipment maintenance. If you want to know more, please consult the website http://www.cnxgtzyj.cn 。