(1) Reason analysis: Lack of image is a common malfunction in endoscopes. Damage to the objective lens, water ingress, or fragmentation of the inner tube cylindrical lens can result in lack of image. However, as long as one of the cylindrical transparent bodies of the inner tube lens is fragmented, it can lead to lack of image.
(2) Troubleshooting: Firstly, use a magnifying glass to check for dents or bends in the mirror body; Secondly, check if the objective lens end is broken; Afterwards, check the mirror for water ingress due to poor sealing performance.
(1) Reason analysis: Image darkening is usually caused by the light source, and dirt on the objective lens and optical fiber, as well as moisture entering the hard lens tube, can also darken the image.
(2) Exclusion method: Firstly, use the replacement method to check if the optical fiber has too many fractures (generally, the optical fiber can continue to be used if the fracture does not exceed 15%, and once it exceeds 15%, the image will appear dark); Secondly, check for dirt and dust on the objective lens and optical fiber of the hard lens; Afterwards, check if the sealing of the mirror is intact.
(1) Cause analysis: The yellowing of the image is mostly caused by a malfunction of the objective lens group.
(2) Troubleshooting method: Endoscopic equipment maintenance personnel should check whether the color parameters on the machine are set correctly; Secondly, check if there is moisture entering the endoscope; Afterwards, observe whether the adhesive on the objective lens group has yellowing caused by aging.
Dust found in the image
(1) Reason analysis: There is dust inside the image. Firstly, there is dirt outside the objective lens and eyepiece, or the entire optical system is relatively dirty. Secondly, there is friction between the columnar transparent body and the spacing tube column during use, which can also produce small powder, which is reflected in the image as dust over time.
(2) Troubleshooting: Check for dirt, dust, and scratches on the objective lens and eyepiece.
(1) Reason analysis: The formation of foggy images is mainly due to the entry of water vapor, especially due to aging. Water vapor enters the lens body from the objective lens end, eyepiece end, and fiber seal.
(2) Troubleshooting: Check the sealing of the objective and eyepiece ends, and check the sealing of the fiber optic interface.
Image deformation with shadows
(1) Reason analysis: Image deformation and shadows are often caused by human factors such as bending and deformation of the work tube under force, or it may be caused by looseness in the imaging system.
(2) Troubleshooting: Rotate the mirror to check if the mirror body is twisted or bent.
A rigid endoscope is a valuable and frequently used precision device that appears sturdy but is actually fragile, and can cause damage to the mirror in all stages of use. So we need to properly use and maintain it, and more matters will come to our website Consult!