On TV, we often see such a shot: after a picture is frozen, the shot will present a three-dimensional shadow of the content of the frozen picture, which has always been puzzling.

Another method is to shoot with laser, which is officially called holography.

Holography not only records the amplitude (intensity) of the reflected light wave of the photographed object, but also records the relative phase of the reflected light wave.

When shooting a hologram, every point on the photosensitive film receives the light reflected by the whole object, so a small part of the hologram can reproduce the whole object.

In order to meet the interference conditions of light generation, laser with good coherence is usually used as the light source to separate the light and the light illuminating the object from the same laser beam. The photosensitive film is developed into a hologram. Holograms do not directly display images of objects. When the laser beam or monochromatic light is incident in the direction close to the reference light, the image of the original object can be observed at an appropriate angle. This is because the laser beam is reflected on the interference fringes of the hologram and the original light wave is reproduced. The reconstructed image is stereoscopic.

I hope it helps you.