The invention relates to a method for the recording and reading of data
with a holographic write/read apparatus onto a holographic recording
medium with a thin holographic recording layer. The medium is preferably
an optical card (2). The recording of the information is in the form of
data pages stored as thin Fourier holograms (61). According to the
invention, it is foreseen to use reflected transmission and polarisation
holography with different write and read wavelengths, and to correct
during reading the distortion in the readout channel caused by the
difference between the write and read wavelengths. The invention further
relates to an apparatus and system for performing the method. There is
also disclosed a method of coding the recorded information.