Theoretical aspects

Let's denote by A and A _R the complex amplitudes respectively of the wave Σ scattered by the object and of the reference wave Σ _R (figure 4 ) at hologram H.

The total amplitude at point H is : A _H = A + A _R

The recording medium is sensitive to the light energy W it receives per unit area, i.e. the product of illuminance (or intensity I) and exposure time τ .