Optical disk head including a light path having a thickness and

Details Optical disk head including a light path having a thickness and Optical disk head including a light path having a thickness and

1991-07-12

1994-05-31

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369112, 369 4423, 369103, 359571, G11B 700

Patent

active

053175514

ABSTRACT:
An optical disk head which includes a substrate, a light path for allowing light beam to propagate in a zigzag form, having a thickness and width of 10 times greater than the wavelength, a light source optically connected to the light path so as to allow an incident light from the light source to propagate therethrough, a first light condenser optically connected to the light path so as to radiate the light beam propagated through the light path upon an object provided toward a top surface of the substrate, a second light condenser for guiding the light beam reflected from the object into the light path, and an optical detector for detecting the light beam propagated through the light path guided by the second light condenser.

REFERENCES:
patent: 4866694 (1989-09-01), Korth
patent: 4966446 (1990-10-01), Huang et al.
patent: 4966447 (1990-10-01), Huang et al.
patent: 5070488 (1991-12-01), Fukushima et al.
Book, "Autofocus Hitec Technologies", edited by M. Kohno (with English translation), pp. 291-298 (undated).
"Planar Integration of Free-Space Optical Components" by Jurgen Jahns and Alan Huang, Applied Optics, vol. 28, No. 9, May 1, 1989.

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