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介绍一种在反射体积全息图片的拍摄中采用单片机控制稳定干涉条纹的方法。外界扰动常造成干涉条纹的随机漂移 ,从而使拍摄到的反射体积全息图片质量下降。在组成迈克尔逊光路中 ,利用带有数字PID调节器的反馈控制系统去控制压电陶瓷PZT产生位移 ,补偿干涉条纹的漂移 ,获得了比光学双稳态调节更为稳定的干涉条纹 ,所拍摄全息图片的质量得到提高
A method of controlling stable interference fringes by single chip microcomputer is introduced in the filming of reflection volume hologram. External disturbances often result in random drift of interference fringes, resulting in a reduction in the quality of the recorded holographic volume. In the composition of the Michelson optical path, the feedback control system with a digital PID regulator is used to control the displacement of the piezoelectric ceramic PZT to compensate the drift of the interference fringes, and the interference fringes which are more stable than the optical bistable adjustment are obtained. The quality of the hologram is improved