【摘要】 在扩展白光编码栅谱衍射干涉法的基础上,本文提出了用同轴计算机傅里叶全息图合成编码栅的新方法,使得谱衍射干涉法的干涉形式可随编码栅图案改变的特点成为现实可能,相应能容易地产生一般干涉形式之外的任何干扰图.编码谱函数由一定的几何图案所构成,本文还提出了几何光学近似方法,使得物面函数可近似用纯相位变化表示,这样将得到较易制作的两元型干涉计算机全息图,从而也避免了复杂的两维傅里叶变换计算.更多还原

【Abstract】 A new method with in-line F-T computer-generated holograms is proposed to synthesize the coded gratings for the coded grating F-T diffraction interferometry, so that it becomes effective in practice that various forms of interference can be achieved by using different masks. As a result, any abnormal forms of interference can be easily obtained.The required F-T spectrum commonly consists of geometric patterns, thus, another new idea is proposed that the corresponding object function can be expressed by pure phase variations in geometric consideration. Therefore, the CGHs used for coded gratings are really computer-generated interferograms that can be more easily prepared, and the calculation for 2D Fourier transformation can be totally economized.更多还原