为了测试一种玻璃微珠原向反射屏的发散角, 采用CMOS高速相机拍摄玻璃微珠原向反射屏反射回来的激光光束在硫酸纸屏上成像的激光光斑, 处理光斑图像, 根据一定的几何比例关系, 计算得到了原向反射屏的发散角角度, 其范围为0.907°~0.956°。结果表明, 该测试方法设计合理、数据可信, 具有一定实用价值。

To test the divergence angle of a glass bead Scotchlite retroreflector, after utilizing a CMOS high-speed camera to take photos of laser spots imaged on a piece of parchment paper reflected by the glass bead Scotchlite retroreflector, the images of laser spots were processed and the divergence angle was calculated according to a certain geometric proportion. The divergence range of the retroreflector was 0.907°~0.956°.Results show that the test method is reasonable and has certain practical value.