温度循环条件下某光电舱结雾现象分析

Analysis of fogging phenomenon in a sealed cabin under condition of temperature cycling

温度循环筛选是提高产品可靠性的重要手段之一,而光电试验舱内温度循环引发的呼吸作用可能是导致光电产品结雾的原因。文章详细分析了某光电舱温度循环时低温结雾的现象,通过理论计算和相关试验,表明器件内部水汽含量过大是此现象出现的主要原因,而密封结构的呼吸作用影响较小。根据以上结果,提出了相关解决措施。

Temperature cycle screening is important to improve the product reliability,and the respiration isa main cause of fogging in optoelectronic products,thus the study of fog phenomenon in photoelectric productsunder the condition of temperature cycle is of significance for similar engineering problems.Thelow-temperature fogging during the temperature cycle of a sealed chamber is analyzed in detail in this paper.Theoretical calculation and the experiment show that the internal moisture content of the device is the mainfactor of fogging.The respiration of the chamber’s sealed structure has a relatively small effect.Technicalimprovements can be made based on this finding.