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.
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.
This CCD industrial endoscope has the following characteristics:
(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) 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) It can be observed by many people at the same time, making the inspection effect more objective and accurate.
(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.