The difference between holographic photography and ordinary photography

1, holographic photos are different from ordinary popular science photos. Under proper illumination, the scene displayed on the hologram is three-dimensional, and all sides of the scene can be seen.

2. The difference between holographic photography and conventional photography is that conventional photography only records the change of light intensity on the surface of the object being photographed, that is, only records the amplitude of light; Holography records all the information of light waves, not only the amplitude, but also the phase of light waves. In this way, all the information of the optical wave field of the space object is stored and recorded. Then, the original space scene is revealed by the diffraction of monochromatic illumination light with specific wavelength by hologram. It can "revive" a frozen scene and show it to people.

3. Ordinary photography can only store the spatial distribution of the light intensity of the object being photographed, which can't meet the requirement that people want to perceive the real 3D scene in a specific environment; Holography is called "holography" because it records the interference fringes between the object light wave and the corresponding reference light wave, thus recording all the light field information including the amplitude (light intensity) and phase of the object.