MVME705A
MVME705A
MVME705A
扫描3D成像方法可分为扫描测距、主动三角法、色散共焦法等。其实,色散共焦法是扫描测距法的一种,考虑到目前在手机、平板显示等制造行业应用比较广泛,在此单独介绍。
1、扫描测距
扫描测距是利用一条准直光束通过一维测距扫描整个目标表面实现3D测量。典型扫描测距方法有:
1、单点飞行时间法,如连续波频率调制(FM-CW)测距、脉冲测距(激光雷达)等;
2、激光散射干涉法,如基于多波长干涉、全息干涉、白光干涉散斑干涉等原理的干涉仪;
3、共焦法,如色散共焦、自聚焦等。
单点测距扫描3D方法中,单点飞行时间法适合远距离扫描,测量精度较低,一般在毫米量级。
其他几种单点扫描方法有:单点激光干涉法、共焦法和单点激光主动三角法,测量精度较高,但前者对环境要求高;线扫描精度适中,效率高。
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