1. In terms of materials science, handheld video endoscope manufacturers can be divided into two types: hard tube type and hose type, also known as hard endoscope and soft endoscope.

rigid

The rigid endoscope includes three parts: image transmission, lighting and stomata. The image transmission part is divided into objective lens, relay system and eyepiece to form a conductive image. The lighting part adopts the method of penetrating cold light source into China with optical fiber. The role of stomata is to supply air, water and biopsy forceps.

Softness

Endoscopes that use fiber beams to transmit images and guide light or CCD to transmit images become flexible endoscopes. Because it has good softness and convenient operation performance The soft endoscope is characterized by convenient access and can reach places that cannot be reached by the hard endoscope. With the head bending mechanism, the blind area can be eliminated. Sampling and * * can be done through the biopsy hole. Soft endoscopy can be divided into fiber endoscopy and electronic endoscopy

Handheld video endoscope manufacturers can be divided into optical mirror, optical fiber mirror and electronic mirror according to the imaging form.

The optical mirror completely transmits the internal object image to the detector's eyes through light without distortion, so the image is very fidelity, which is also high in definition among these mirrors.

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