Surface contouring in a video frame by changing the wavelength of a diode laser
Surface contouring in a video frame by changing the wavelength of a diode laser
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通过改变二极管激光器的波长来塑造视频帧中的表面轮廓
DOI：
10.1117/1.600715
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
H. Tiziani
中科院分区：
文献类型：
--
作者：
Y. Zou;G. Pedrini;H. Tiziani
报道了一种利用电子散斑干涉术（ESPI）或直接调制激光二极管电流的电子全息术的双波长表面轮廓系统。对应于激光的每个波长的测试对象的两个状态可以被记录在单个视频帧的两个场中。这是通过使行间转移CCD（电荷耦合器件）相机在非隔行模式下与二极管的电流调制同步来实现的。低频环境干扰，如空气湍流、物体缓慢漂移和物体中的应力，对测量没有影响。测试对象不需要放在隔振台上。定量的实验结果。
Two-wavelength surface contouring systems using either electronic speckle pattern interferometry (ESPI) or an electronic holography procedure by modulating directly the current of a laser diode are reported. Two states of the test object corresponding to each wavelength of the laser can be recorded in both fields of a single video frame. This is achieved by synchronizing the interline-transfer CCD (charge-coupled device) camera in a noninterlaced mode to the current modulation of the diode. Environmental disturbances at low frequencies such as air turbulence, slow object drift and stress in the object have no influence on the measurements. The test object does not need to be on a vibration isolated table. Quantitative experimental results are presented.