Photo-to-photo conversion element and its applied system

摘要

A photo-to-photo conversion element is disclosed. The element has, in an arranged sequence in line; a first optical member having a wavelength selectivity permitting to pass a write light having a first wavelength range, and to block an erase light; a first transparent electrode; a photoconductive layer; a second optical member having a wavelength selectivity permitting to reflect a read light having a second wavelength range and to pass the erase light; a third optical member for electrooptically modulating a light incident thereto through the second optical member in response to the strength distribution of an electric field applied thereto; and a second transparent electrode; the erase light having a wavelength out of both the first and second wavelength ranges.