Registers – Coded record sensors – Particular sensor structure
Patent
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
Deckert Curtis K.
Gonzales Oscar
Urshan Sydney
Frech Karl D.
Willis Davis L.
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