天气预报 > 其他 > 3寸透镜直径是多少厘米
3寸透镜直径是多少厘米
更新时间: 2020-11-06 00:00:00  

3寸透镜直径是7.62厘米,3寸的透镜要比2.5寸的直径大20%,透镜透光率更高,成像效果更好。透镜是用透明物质制成的表面为球面一部分的光学元件,镜头是由几片透镜组成的,有塑胶透镜和玻璃透镜两种,玻璃透镜比塑胶贵。

关键词: 透镜 直径 多少 厘米

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