公开(公告)号：DE1547366A1

公开(公告)日：1970-01-02

申请号：DE1547366

申请日：1966-09-16

Applicant: IBM

Inventor： SHAW SCHOOLS RODMAN ,  SINCERBOX GLENN

IPC: G01D15/14 ,  G03H1/26 ,  G06K1/12 ,  G11C13/04

Abstract: 1,107,477. Information recording. INTERNATIONAL BUSINESS MACHINES CORPORATION. Sept.13, 1966 [Dec.30, 1965], No.40764/66. Heading G2J. Light from a laser 1 passes through a film 3 having a photo-sensitive emulsion 4, e. g. a silver halide emulsion, and is reflected back upon itself by a mirror 2, thereby causing the light-waves to pass again through the film and set up standing waves therein, giving rise to equispaced parallel layers of metallic silver, as in the Lippmann process. The film is mounted so as to be rotatable into different angular positions, thus the light-waves form groups of spaced layers, the layers of each group being inclined to the layers of every other group. Alternatively, the film 3 may be exposed to light of different wave-lengths at different angles, or to light of different wave lengths at the same angle. To record information in binary form, the radiation from an He-Ne laser is used to form periodic structures, as described, in each region of the film, each structure representing one bit of information in one region. The information recorded in the film is read by transmitting radiation of the appropriate wave-length through the film, and sensing the transmitted or reflected wave energy as modified by the periodic structure of the film.

公开(公告)号：DE1547367A1

公开(公告)日：1969-11-13

申请号：DE1547367

申请日：1966-09-17

Applicant: IBM

Inventor： SHAW SCHOOLS RODMAN ,  TAVERNIA SINCERBOX GLENN

IPC: G11C13/04