Saldner H O, Molin N E, Stetson K A
Appl Opt. 1996 Jan 10;35(2):332-6. doi: 10.1364/AO.35.000332.
TV holograms for spatial phase stepping are formed with a small angular offset between the object and the reference beams to give a spatial frequency bias to the pattern recorded by the TV camera. It is common to set the bias so that there is a 90° or 120°phase shift between adjacent pixels and to use the irradiance of three or more adjacent pixels to evaluate the phase of the interference. We report the Fourier-transform evaluation of such recordings to obtain their phase data. We also demonstrate the direct calculation of the phase difference between successive recordings without intermediate calculation of the random phase of each hologram. This technique is proposed as an approach to pulsed TV holography.
用于空间相位步进的电视全息图是通过在物光束和参考光束之间设置一个小的角度偏移来形成的，以便给电视摄像机记录的图案赋予空间频率偏差。通常设置偏差，使得相邻像素之间有90°或120°的相移，并使用三个或更多相邻像素的辐照度来评估干涉的相位。我们报告了对这种记录进行傅里叶变换评估以获得其相位数据的方法。我们还演示了直接计算连续记录之间的相位差，而无需对每个全息图的随机相位进行中间计算。该技术被提议作为一种脉冲电视全息术的方法。
