Maintenance and precautions of ureteroscope with endoscope

　　此硬管镜客户判定的故障为成像模糊。

　　The fault judged by the hard tube mirror customer is imaging blur.

　　拿到镜子后，先做检测：

　　After getting the mirror, make a comprehensive test first:

　　检查镜子外观是否有明显伤痕，经过确认，外观上并无伤痕。再检查物镜、目镜是否有损坏，在显微镜下观察，物镜、目镜也没有发现损坏。继续检查，外管无弯折，可以断定成像模糊并非机械损伤；接下来检测导光光束：放在冷光源下观察导光效果，观察到导光束中并无黑点，可以判定导光光束并无断丝。检查器械通道，发觉器械通道虽然略微磨损，但并不影响使用，在合格范围内。到此刻可以判定该条镜子并无机械损伤。

　　First, check whether there are obvious scars on the appearance of the mirror. After confirmation, there are no scars on the appearance. Check whether the objective lens and eyepiece are damaged again. Observe under the microscope, no damage is found on the objective lens and eyepiece. Continue to check that the outer tube is not bent, and it can be concluded that the imaging blur is not mechanical damage; next, check the light guide beam: put it under the cold light source to observe the light guide effect, and observe that there is no black spot in the light guide beam, so it can be determined that the light guide beam is not broken. Check the instrument channel and find that although the instrument channel is slightly worn, it does not affect the use and is within the qualified range. At this point, it can be determined that the mirror is free of mechanical damage.
            

　　接下来就是判定光学系统的问题了。接上摄像主机，观察镜子成像，发觉所成图像中虽然模糊，但并无黑点，说明该镜子的传像素完好无损，模糊可能是由于进水、焦距变化等原因造成。

　　The next step is to determine the optical system. Connect the camera host, observe the image of the mirror, and find that although the image is fuzzy, there is no black spot, indicating that the transmission pixel of the mirror is intact, and the blur may be caused by water inflow, focal length change and other reasons.

　　判定问题原因后，就可以开始做针对性的维修了。

　　After determining the cause of the problem, you can start to carry out targeted maintenance.

　　打开护目罩，然后拧下护目罩，松开目镜组紧固螺丝，取下目镜组，在显微镜下仔细检查，并无任何损伤，但有水珠凝结在里面的镜片上，说明镜管内部进水，这是成像模糊的其中一个原因。然后加热物镜组使粘接胶水软化，从目镜端将传像素顶出，并逐一检查，发现传像素端面有水迹，需要清洁。

　　First, open the goggle, then screw out the goggle, loosen the fastening screws of the eyepiece group, take down the eyepiece group, and carefully check under the microscope, there is no damage, but there is water condensation on the inside of the lens, which indicates that there is water in the lens tube, which is one of the reasons for the blurred imaging. Then heat the objective lens group to soften the adhesive, push the pixel out from the eyepiece end, and check one by one. It is found that there is water trace on the end face of the pixel, which needs to be cleaned.

　　将目镜组的水迹擦去，重新研磨传像素端面，使之达到所需要求，重新装好整条镜子，调整好光学参数后，接入摄像主机检查成像效果。此刻成像清晰，说明本身的光学元件没有问题，不影响成像。将目镜组放入烘箱中烘干其中的水汽。重新装好整个光学系统，调整好焦距，确认成像清晰。装好护目罩，用密封胶密封好，确保在后续使用过程中不会进水。

　　Wipe off the water trace of the eyepiece group, re grind the end face of the pixel transmission to meet the required requirements, re install the whole mirror, adjust the optical parameters, and then connect the camera host to check the imaging effect. At the moment, the image is clear, indicating that there is no problem with its own optical elements, which does not affect the image. Put the eyepiece group into the oven to dry the water vapor. Reinstall the whole optical system, adjust the focal length, and make sure the imaging is clear. Install the eye protection cover and seal it with sealant to ensure that there is no water in the subsequent use process.

　　确认装配完毕后，复检该硬管镜的亮度、清晰度、圆度、焦距等各项指标，确保各项指标均达到要求。

　　After confirming the assembly, recheck the brightness, clarity, roundness, focal length and other indicators of the hard tube mirror to ensure that all indicators meet the requirements.