负透镜
The contrastive facular pictures show that the thermal lens effect of heat capacity operation is negative lens effect not same as convex effect of general water-cooling operation.
通过对比分析光斑变化趋势,热容方式运行的钕玻璃激光器的热透镜效应是负透镜效应,明显有别于常规方式运行的正透镜效应。
We introduce a negative lens which will diverge the rays a bit.
我们用一块负透镜,它将使光线发散一些.
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