G - Physics – 11 – B
Patent
G - Physics
11
B
352/31, 352/32.4
G11B 11/10 (2006.01) G11B 11/105 (2006.01)
Patent
CA 1303739
ABSTRACT OF THE DISCLOSURE A magneto-optic (MO) record for recording in re- sponse to radiation intensity modulation in the pre- sence of a magnetic field. In one embodiment, radia- tion is incident on a given side of the record and it includes a layered structure having erasable MO mater- ial. A substrate supports the MO material on the side of the material away from the given side and is fabri- cated from a material having preferred support charac- teristics that are selected without regard for the transmissive optical characteristics thereof. A sup- port spaces a window for forming an air gap on the side of the MO material toward the given side of the record. The window is optically transparent and has minimal birefringence so that the radiation incident on the given side of the record is transmitted through the window with minimal optical retardation. As a result, the difference of the effective Kerr angle of polarization rotation corresponding to different mag- netizations (up or down) of the MO recording layer re- lates primarily to data recorded and not to optical retardation from the window. In other embodiments, transparent adhesive is provided in the air gap, and a tuned multi-layer interference structure (including MO material) is used in place of the previous layered structure to enhance and optimize the difference of the effective Kerr angle of polarization rotation cor- responding to different magnetizations of the MO recording layer. Two of the records can be placed with their substrates back-to-back (or sharing a common substrate) to form a double sided MO record. KD-1001
566559
Muchnik Boris J.
Smith Christopher A.
Spong Fred W.
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
Kerdix Inc.
Muchnik Boris J.
Smith Christopher A.
LandOfFree
Magneto-optic records does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magneto-optic records, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optic records will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1311298