  We analyze some aspects of recently performed Franson-type experiments with
entangled photon pairs aimed to test Bell's inequalities. We point out that
quantum theory leads to the coincidence rate between detectors which includes
in fact a dependence on the distance. We study this dependence and obtain that
for large distances the correlation function vanishes. Therefore with taking
into account the space parts of wave functions of photons for large distances
quantum mechanical predictions are consistent with Bell's inequalities. We
propose an experimental study of space dependence of correlation functions in
Bell-type experiments.
