The laser beam passes through the film once, and exposes it, then the tissue scatters the light back onto the film, producing an interference pattern with the first exposure to form the hologram.

• 激光束一旦穿透胶片，即使其曝光； 然后该组织把光散射回到胶片上，与第一次曝光产生一个干涉图象，即构成全息图。