Dual stripe optical data card

• US 4,683,371 A
• Filed: 08/06/1985
• Issued: 07/28/1987
• Est. Priority Date: 02/27/1981
• Status: Expired due to Fees

• Current Assignee: LaserCard Corp. (Assa Abloy AB)
• Original Assignee: Drexler Technology Corporation (Assa Abloy AB)
• Inventors: Drexler, Jerome
• Primary Examiner(s): Trafton, David L.
• Application Number:
  US06/763,027
• Time in Patent Office: 721 Days
• Field of Search: 235/440, 235/454, 235/456, 235/468, 235/470, 235/487, 350/3.61, 346/76 L, 430/10, 430/13, 365/106
• US Class Current: 235/487
• CPC Class Codes: G06K 1/12 otherwise than by punching
• CPC Class Codes: G06K 19/06046 Constructional details
• CPC Class Codes: G06K 19/14 the marking being sensed by radiation
• CPC Class Codes: G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence
• CPC Class Codes: G07C 9/25 using biometric data, e.g. fingerprints, iris scans or voice recognition
• CPC Class Codes: G11B 17/34 Guiding record carriers during transducing operation, e.g. for track following G11B17/32 takes precedence
• CPC Class Codes: G11B 7/0033 with cards or other card-like flat carriers, e.g. flat sheets of optical film
• CPC Class Codes: G11B 7/24 Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the arrangement of information on the carrier G11B7/007
• CPC Class Codes: G11B 7/26 Apparatus or processes specially adapted for the manufacture of record carriers

Abstract

An optical data card having a pair of spaced apart information strips. One strip has pre-recorded programs or data and is always a non-erasable strip. This strip may be either a reflective direct-read-after-write non-erasable type or may be a read-only optical memory (ROOM) strip. Another strip serves as a temporary, scratchpad or cache memory and is either a reflective DRAW strip of the erasable type or a DRAW non-erasable strip which is at least partially blank, with sufficient space for temporary memory needs over an extended period of time.

Claims

1. An optical data card comprising,

a card substrate having opposed sides and a length equal to or exceeding a width,

a first strip of erasable optical recording material affixed to said card substrate, said first strip being in-situ laser recordable and being substantially blank, and

a second strip of optical data storage material affixed to said card substrate, said second strip having pre-recorded programs or data thereon.

2. The data card of claim 1 wherein said first strip comprises a direct-read-after-write, reflective, erasable strip and said second strip comprises a direct-read-after-write, reflective non-erasable strip.

3. The data card of claim 1 wherein said first strip comprises a direct-read-after-write, reflective, erasable strip and said second strip comprises a read-only optical memory.

4. The data card of claim 1 wherein said first strip comprises a direct-read-after-write, reflective, erasable strip having some pre-recorded programs or data thereon, and said second strip comprises a read-only optical memory.