纤维内镜的原理及结构（The principle and structure of fiberoptic endoscope）.docVIP

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纤维内镜的原理及结构（The principle and structure of fiberoptic endoscope）.doc

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纤维内镜的原理及结构（The principle and structure of fiberoptic endoscope）

纤维内镜的原理及结构（The principle and structure of fiberoptic endoscope） The principle and structure of fiberoptic endoscope The principle and structure of fiberoptic endoscope With the development of fiber optics, the success of endoscopic surgery in 1957. Fiber optic fiber (fiber) is used to make fiber optic endoscope to guide light and guide beam. Because of its total reflection transmission fiber characteristics and external light source, the brightness is increased, and the image is clear. The fiber is fine, soft and flexible. The endoscope made of it is thin and soft, and the head can be bent. The mirror bends in the cavity and reduces the blind area. For decades, endoscopic technology and endoscopic manufacture have become more and more mature, and widely used in clinical, scientific research, and promote the development of the digestive sciences. First, the light guiding principle of light guide fiber Light travels in a straight medium in a uniform medium, and its propagation speed varies with the medium. According to the propagation speed of light in the medium size into denser medium and optically thinner medium. Compared to crown glass, flint glass is a dense medium for flint glass. When light from a medium to transmit another medium, in the street can see the reflection and refraction of incident light, if not reflected in the second medium, but completely reflecting member media, calls this phenomenon of total reflection. A fiberoptic endoscope is made from fibers that have total reflective properties of light. At present, glass fiber is made of flint glass and core fiber is covered with crown glass. When the light from the glass fiber into the end, because of the high rate of refraction of flint glass to crown glass, and the inner surface of the glass in a radiation light is reflected to the inner surface of the side, after the whole firing repeatedly, the other end of the fiber optical fiber by injection. When the fiber is bent, the reflection angle changes, b