Passively aligned integrated optical head including light source

Details Passively aligned integrated optical head including light source Passively aligned integrated optical head including light source

1996-09-27

1998-06-23

Swann, Tod R.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4412, 369122, 257 98, G11B 700

Patent

active

057712182

ABSTRACT:
An integrated optical head, such as, for a disk drive, preferably includes an optically transparent substrate. The substrate has a diffractive optical element formed on one face and a plurality of electrical contact pads exposed on the other face. A light source is positioned to emit light through the substrate, through the diffractive optical element, and toward data storage media. The light source includes a plurality of electrical contact pads corresponding to the plurality of electrical contact pads exposed on the face of the substrate. An optical detector is positioned to detect light reflected from the data storage media, through the diffractive optical element, and through the substrate. The optical detector includes a plurality of exposed electrical contact pads corresponding to the plurality of electrical contact pads exposed on the face of the substrate. The substrate and the light source and optical detector are passively aligned using solder bumps between pairs of contact pads. A mechanical passive alignment arrangement is also disclosed.

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"Holographic Optical Head for Compact Disk Applications" Wai-Hon Lee, Pencom International Corporation, Jun. 1989/vol. 28, No. 6.

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