I read that it is possible to record more than one picture on to the film , or several at front side , several at the back side.

This is done by using different effects of polarization and cast one specimen on to film and read only one , than other , than other.

May be this can be used to record 150 pictures on to single roll of 35 mm film

read that :

http://www.polytech.mat.ethz.ch/rese...iss/kocher.pdf

Best ,

Umut