Application of Optical Fiber in Medical Endoscopy_Application_Dongguan KINZ Optoelectric Technology Co.Ltd.

Application of Optical Fiber in Medical Endoscopy

1. What is the role of fiber optic endoscope in medical treatment?

The endoscope made of optical fiber is soft, thin and bendable. When it is inserted into the patient's stomach, the patient will not have pain. In addition to the stomach, the fiber optic endoscope can also be used in the esophagus, rectum, bladder , uterine and other deep exploration. On the one hand, fiber optic endoscope can be used to check whether the patient's organs have lesions, and more importantly, it can input laser energy into the internal organs, irradiate or excise the diseased tissue, and play the role of a scalpel. Laser scalpels connected with optical fibers are currently in clinical use.

2. Features of using endoscope fiber:

(1) The working principle of the fiber optic endoscope is similar to that of the optical mirror. In order to enter the smaller hole, we choose the fiber optic endoscope. The clarity of the fiber optic endoscope depends on the number of fiber bundles.

(2) Fiber optic endoscope: the apex part, the bending part, the insertion part, the operation part, the light guide hose, the light guide connecting part, the eyepiece apex part are formed into a small rigid section with a direct viewing type (frontal viewing type), a side viewing type, a strabismus type. The gastroscope and colonoscope use the direct viewing method, and the duodenoesophagoscope uses the side viewing method. There are: an objective hole (image beam), a light hole (light beam), an air and water hole (nozzle), a biopsy hole at the apex of the apex. The bending part uses the four steel wire pulling method. The head has four steel wires connected with the control part. Turn the upper, lower, left and right handwheels of the control part to pull the steel wires in different directions respectively, so that the bending head swings in the corresponding direction. The bending part contains light guides, image beams, various pipes and traction devices, bending tubes and bending rubber bands.

(3) The tube part includes a bending part and an insertion part, also called a spiral tube. It is equipped with a light guide, an image beam guide, a water and gas pipeline, a biopsy pipeline (and a suction pipeline), a traction steel wire, an outer stainless steel hose and a metal mesh tube, and the outer layer is a smooth plastic shell. The fiber bundle that transmits the image is the main part of the fiber endoscope, which is composed of tens of thousands of extremely thin glass fibers. According to the principle of optical total reflection, all glass fibers must be coated with a film of lower refractive index to prevent. It is ensured that all the light transmitted by the inner core of the fiber can be completely reflected. The transmission of a single fiber can only create one light spot. In order to see the image, a large number of fibers must be bundled. If the image is to be transmitted to the other end to form the same image, each fiber must be in its own position. The two ends are in the same position, which is called the aiming beam. If you turn off the aiming beam, another black spot will appear in the image. The light guides do not have to be in the same position, and the brightness will be significantly reduced if many of them are turned off.