Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Reexamination Certificate
2006-09-12
2006-09-12
Psitos, A. M. (Department: 2627)
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
C369S112010, C359S586000
Reexamination Certificate
active
07106664
ABSTRACT:
An optical head including a first dielectric layer having a first refractive index, a pair of second dielectric layers located adjacent to the first dielectric layer on both sides thereof, each of the second dielectric layers having a second refractive index larger than the first refractive index, a pair of third dielectric layers located adjacent to the second dielectric layers, and a pair of fourth dielectric layers located adjacent to the third dielectric layers, each of the fourth dielectric layers having a third refractive index larger than the first refractive index. Light is incident on the optical head in a direction orthogonal to a layering direction of the first to fourth dielectric layers. The first dielectric layer and each of the third dielectric layers have different refractive indices or different thicknesses.
REFERENCES:
patent: 09-326130 (1997-12-01), None
patent: 10-302291 (1998-11-01), None
patent: 11-328713 (1999-11-01), None
patent: 2001-66240 (2001-03-01), None
patent: 2001-134972 (2001-05-01), None
patent: 2002-184036 (2002-06-01), None
Hasegawa Shin-ya
Tawa Fumihiro
Greer Burns & Crain Ltd
Psitos A. M.
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