当前各学校开设的全息照相实验只能拍摄小型的静止物体,这主要是因为一般实验室使用的氦氖激光器功率较小,扩束后强度太弱,即使在小范围扩束也要求较长的曝光时间,为使在曝光期间干涉条纹不至模糊,光学设备必须稳定到几分之二个波长。随着全息照相技术的不断发展,已经可以拍摄运动物体的全息照相。因为使用的光源强度越高, At present, the holographic experiment set up by each school can only shoot small stationary objects. This is mainly because the helium neon laser used in the general laboratory has a small power and the intensity after expanding the beam is too weak, and a longer The exposure time, in order to not obscure the interference fringes during exposure, the optical device must be stabilized to a fraction of two wavelengths. With the continuous development of holographic technology, it has been possible to photograph holograms of moving objects. Because of the higher intensity of light used,