High-speed optical recording and playback apparatus capable of r

Details High-speed optical recording and playback apparatus capable of r High-speed optical recording and playback apparatus capable of r

1993-06-16

1995-11-21

Willis, Davis L.

Registers

Coded record sensors

Particular sensor structure

235479, 235485, G06K 700

Patent

active

054689449

ABSTRACT:
Apparatus consisting of a flat, two-dimensional array of laser/photo diodes; an optical storage card positioned below the array; and a mechanism to move the card in both the X- and Y-directions to position the laser/photo diode array over any one particular location on the card. A further mechanism serves to move the card in the X- and Y-directions and angularly to provide an initial alignment of the card with respect to the laser/photo diode array. Yet another mechanism moves the card in the Z-direction for focusing purposes. A laser/optical interface positioned between the laser/photo diode array and the card which is formed of an array of collimating and focusing holographic micro lenses (HOE) with surface diffraction patterns. An electronic section functions as an interface between a central processing unit (CPU) and the lasers and photo diodes of the array. The optical storage card is a thin, re-writable phase-change type.

REFERENCES:
patent: 5008552 (1991-04-01), Kuramochi
patent: 5059774 (1991-10-01), Kubo
patent: 5130521 (1992-07-01), Shino

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