全息摄影的拍摄条件与普通摄影条件不同,因此需要建立全息感光材料特性的测定方法。首先,讨论一下全息干板的感光度测定的基准密度点。感光度(S)是感光材料感光速度的标志。它是用胶片在产生一定的光学密度(D)时,所需曝光量(H)的倒数乘以常数来表示;S=H/1·K。对 Holographic shooting conditions and ordinary photography conditions are different, so the need to establish a holographic photosensitive material properties of the determination. First, discuss the point of reference densitometry for holographic plate sensitivities. Sensitivity (S) is a sign of light-sensitive material speed. It is expressed in terms of the reciprocal of the desired amount of exposure (H) multiplied by a constant when the film produces a certain optical density (D); S = H / 1 · K. Correct