The time difference between both diodes indicated the time of the holography picture related to the arrival of the laser pulse at the target.
Holography offers the potential for large field and high resolution.
The off-axis holography technique has the advantage that the reconstructed beam and the image are separate.
In the second method we have used off-axis holography to record the forward scattering only.
Three configurations of off-axis holography were applied in our experiments: holograms based on back scattering, holograms based on forward scattering, and holograms using both backward and forward scattering.
In the first method we have used forward and backward scattering simultaneously with a single reference beam and recorded both cases of off-axis holography on the same film.
I do not think it is fair to say that holography is quite akin to photography in that sense.
It assumes a relationship between photography and holography which may not remain the same.
