The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 1995
Filed:
Jun. 16, 1993
Sydney Urshan, North Hollywood, CA (US);
Curtis K Deckert, Santa Ana, CA (US);
Oscar Gonzales, Venice, CA (US);
Other;
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.