沒有圖像
No images
（1）原因分析：沒有圖像是內窺鏡常出現的故障，物鏡的損壞或者進水、內管柱狀透鏡的碎裂都會出現沒有圖像的現象，而內管透鏡只要其中一個柱狀透體碎裂就會導致沒有圖像。
(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）排除方法：，借助放大鏡檢查鏡身有沒有凹痕或者彎曲；其次，看物鏡端有沒有破裂；后，檢查鏡子是否因密封性能不好造成進水。
(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.
圖像發暗
Image darkening
（1）原因分析：圖像發暗通常是由光源引起的，物鏡和光纖上的污物及硬鏡管內有潮氣進入也會使圖像發暗。
(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）排除方法：，采用更換法檢查光纖是不是斷裂太多（一般情況下光纖斷裂不超過15%可以繼續使用，一旦超過15%就會出現圖像發暗的現象）；其次，檢查硬鏡的物鏡和光纖上有沒有污物及灰塵；后，檢查鏡子的密封性是否完好。
(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.
圖像發黃
Image yellowing
（1）原因分析：圖像發黃大多數情況是由于物鏡組故障導致。
(1) Cause analysis: The yellowing of the image is mostly caused by a malfunction of the objective lens group.
（2）排除方法：
內窺鏡設備維修人員來查看機器上的色彩參數是否設置正確；其次，檢查是不是有潮氣進入內鏡；后，觀察物鏡組上的黏膠有沒有老化引起的發黃。
(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.
圖像內發現灰塵
Dust found in the image
（1）原因分析：圖像內有灰塵一是物鏡、目鏡外有污物或者是整個光學系統比較臟引起的，二是柱狀透體與間隔管柱在使用期間有摩擦現象，也會產生細小粉末，時間長以灰塵狀反映在圖像上。
(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）排除方法：檢查物鏡和目鏡上有沒有污物、灰塵和劃痕。
(2) Troubleshooting: Check for dirt, dust, and scratches on the objective lens and eyepiece.
霧狀圖像
Foggy image
（1）原因分析：產生霧狀圖像主要是有水汽進入，特別是由于老化，水汽從物鏡端、目鏡端及光纖封口處進入鏡體。
(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）排除方法：檢查物鏡和目鏡端的密封性，檢查光纖接口處的密封性。
(2) Troubleshooting: Check the sealing of the objective and eyepiece ends, and check the sealing of the fiber optic interface.
圖像變形有陰影
Image deformation with shadows
（1）原因分析：圖像變形有陰影多是由人為因素導致的工作管受力彎曲變形所致，也有可能是成像系統里面出現松動引起的。
(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）排除方法：轉動鏡子檢查鏡身是否扭曲或者彎曲。
(2) Troubleshooting: Rotate the mirror to check if the mirror body is twisted or bent.
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