Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-12-04
2007-12-04
Neyzari, Ali (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S126000, C385S147000
Reexamination Certificate
active
11501257
ABSTRACT:
An optical head has a first propagation section made of a first low extinction material and installed along an optical axis, a pair of second propagation sections which, being made of a second low extinction material, sandwich the first propagation section, a pair of first confining sections which, being made of a material with propagation capability lower than that of the second propagation sections, further sandwich the first propagation section and second propagation sections from outside the second propagation sections, and a pair of third propagation sections which, being made of a material with light propagation capability higher than that of the first confining sections, further sandwich the first confining sections from outside. Also, an optical head design apparatus calculates a complex propagation constant along an optical axis by solving an equation which is based on F matrices, and thereby design an optical head in a far-sighted manner.
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Hasegawa Shin-ya
Tawa Fumihiro
Greer Burns & Crain Ltd.
Neyzari Ali
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