  For high energy linearly polarized photon--proton scattering we have
calculated the azimuthal and polar angle distributions in inclusive on recoil
proton experimental setup. We have taken into account the production of lepton
and pseudoscalar meson charged pairs. The typical values of cross sections are
of order of hundreds of picobarn. The size of polarization effects are of order
of several percents. The results are generalized for the case of
electroproduction processes on the proton at rest and for high energy proton
production process on resting proton.
