pentaprism camera正校镜照相机
pentaprism test五棱镜检验
pentaprism scanning method五棱镜扫描法
double-pentaprism双五棱镜
pentaprism scannig system五角棱镜扫描系统
The standard plane is generated using laser,pentaprism and rotary table ,and the detector is PSD. The flatness information is got by measuring the discrepancies of the measuring points and standard plane.
该仪器采用了激器、五棱镜与转台组合产生基准平面,以PSD作为探测器;通过测量被测点与基准面的高度差获取平面度数据。
参考来源 - 激光平面度仪的研究N（名词） a five-sided prism that deviates light from any direction through an angle of 90°, typically used in single-lens reflex cameras between lens and viewfinder to present the image the right way round 五角棱镜