公开(公告)号：DE3372031D1

公开(公告)日：1987-07-16

申请号：DE3372031

申请日：1983-02-01

Applicant: IBM

Inventor： BJORKLUND GARY CARL ,  BURLAND DONALD MAXWELL

IPC: G11B7/00 ,  G03C1/73 ,  G03H1/02 ,  G11B7/0045 ,  G11B7/0065 ,  G11B7/26 ,  G03C1/72

公开(公告)号：DE3268139D1

公开(公告)日：1986-02-06

申请号：DE3268139

申请日：1982-09-08

Applicant: IBM

Inventor： BJORKLUND GARY CARL ,  BRAUCHLE CHRISTOPHER R ,  BURLAND DONALD MAXWELL ,  HUNZIKER HEINRICH ERWIN ,  WILD URS PAUL

IPC: G03H1/02 ,  G03C1/73 ,  G03F7/00 ,  G03C1/72 ,  G03C1/71

公开(公告)号：DE3166819D1

公开(公告)日：1984-11-29

申请号：DE3166819

申请日：1981-07-06

Applicant: IBM

Inventor： ALVAREZ DAVID CHRISTOPHER ,  BJORKLUND GARY CARL ,  BURLAND DONALD MAXWELL

IPC: G02F1/35 ,  G03C1/73 ,  G03F7/00 ,  G03H1/02 ,  G11B7/0065 ,  G03C1/72 ,  G11B7/00

Abstract: A process and recording medium for four-level, two-photon holography are provided. These media are particularly useful for recording holograms using continuous wave lasers. The recording medium is formed by a transparent resin containing a tetrazine compound. The process comprises the steps of shining a single beam of light of frequency ω 1 upon a four-level holographic recording medium and exposing the recording medium to light at frequency ω 2 , thereby forming a holographic interference pattern in the recording medium and changing the index of refraction and/or the absorption coefficient of said recording medium.