Like flexible endoscope, the insertion part of industrial video endoscope is soft and flexible. The main difference lies in different imaging methods. CCD is a photoelectric coupling device, which can convert optical signals into electrical signals, and has the characteristics of small volume, high resolution and sensitivity and anti electromagnetic interference. Video endoscope uses this characteristic of CCD device as imaging medium.

探頭前部的物鏡將被檢物體成像到其后的CCD接收面上，CCD把物像轉變成電信號，經信號線傳至一個獨立的視頻控制單元（其間的距離長可達到30m），再將影像輸出到CRT監視器上顯示。

The objective lens in front of the probe will image the object to the CCD receiving surface behind it. The CCD converts the object image into an electrical signal, which is transmitted to an independent video control unit through the signal line (the distance between them can reach 30m), and then outputs the image to the CRT monitor for display.

這種CCD工業內窺鏡有如下特點：

This CCD industrial endoscope has the following characteristics:

（l）圖像清晰，分辨率高工業視頻內窺鏡選用的CCD接收面上的像素數（一個像素就是一個光敏元）通常為幾十萬個，如工業常用的l/2"CCD攝像頭有440，000像素（752H>5S2V），遠遠超過了光纖傳像束的單絲數量，因此擁有極高的圖像分辨率，同時還消除了光纖固有的模糊不清及蜂房影像。另一個特性是圖像的亮度高，由于CCD接收面靠近被檢物，因此相對于剛性內窺鏡中的轉像透鏡組或撓性內窺鏡中的傳像光纖而言幾乎沒有什么光能損失，可獲得高亮度的清晰圖像。

(l) With clear image and high resolution, the number of pixels on the CCD receiving surface (a pixel is a photosensitive element) selected for industrial video endoscope is usually hundreds of thousands. For example, the L / 2 "CCD camera commonly used in industry has 440000 pixels (752H > 5s2v) , which far exceeds the number of single filaments of the optical fiber image transmission beam, so it has very high image resolution and eliminates the inherent ambiguity and honeycomb image of the optical fiber. Another feature is the high brightness of the image. Because the CCD receiving surface is close to the tested object, there is almost no light energy loss compared with the image conversion lens group in the rigid endoscope or the image transmission fiber in the flexible endoscope A clear image with high brightness can be obtained.

（2）延長了檢驗長度，由于光量損失，撓性內窺鏡的長度有限，而視頻內窺鏡從被檢處到控制器之間的距離可延長到30m，大大提高了檢查范圍。

(2) The inspection length is extended. Due to the loss of light, the length of the flexible endoscope is limited, and the distance between the video endoscope and the controller can be extended to 30m, which greatly improves the inspection range.

（3）可供多人同時觀察，使檢查效果更客觀準確。

(3) It can be observed by many people at the same time, making the inspection effect more objective and accurate.

（4）文檔管理，通過控制器，圖像可保存或打印，或經視頻卡將信號接入計算機，進行圖像采集、存儲、處理，檢查結果分析、文檔保存、網絡傳輸等。

(4) Document management: through the controller, the image can be saved or printed, or the signal can be connected to the computer through the video card for image acquisition, storage, processing, inspection result analysis, document saving, network transmission, etc.