OPTICAL MEMORY CELL

• Main Authors: VASILE GEORGIANA, BASCHIR LAURENŢIU, SAVASTRU DAN, PUŞCAŞ NICOLAE, SAVU VALERIU, POPESCU AURELIAN, NEGUŢU CONSTANTIN, STAFE MIHAI, TENCIU DANIEL, MIHĂILESCU MONA
• Format: Patent
• Language: English; Romanian
• Published: 28.04.2023
• Subjects: AUXILIARY PROCESSES IN PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES; PHOTOGRAPHY; PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHYSICS

The invention relates to an optical memory cell and to a process for manufacturing the same. The claimed cell comprises a glass prism (3) on whose base a metal film (12) and a film (11) of amorphous chalcogenide material are deposited, a writing/erasing polarized light source (7), a reading light source (1) and a polariser (2), a photodiode (4) measuring the light reflected on the prism base, where the illumination with polarized light beam (7) induces the optical anisotropy of the refraction index into the film (11) of chalcogenide material, the direction thereof being modified in the same time with the change of polarization of said laser by means of an optical element (9), the anisotropy being kept also after stopping the illumination.