US5410142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical card with printing visible below the optical recording
Assignee: Omron Corp
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Filing: 1993-03-10
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Granted: 1995-04-25
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Expires: 2013-03-10
Abstract
Abstract An optical card having visible data marked on a base layer and a substantially transparent optical data recording layer formed over the base layer. A protective layer is laminated over the optical data recording layer. The visible data marked on the base may be marked in an ink visible only at a nonvisual wavelength, such as infrared. A reader scans the visible data marked on the base layer, since the optical recording layer covering the base layer is substantially transparent.
Inventors
- 👤 Kazuo Tsuboi
- 👤 Koji Iguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:45
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; G06K19/08; G06K19/10; G06K19/14; G11; G11B; G11B7/00; G11B7/002; G11B7/0033; G11B7/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
An optical card to record and reproduce optical data, comprising: a base layer having means for holding printed data; and a substantially transparent recording layer having means for storing optical data, formed on said base layer, said means for storing optical data comprising a plurality of pits formed in said recording layer for diffraction of a light beam.
Claim 2
Dependent Claim
58 words
An optical card to record and reproduce optical data, comprising: a base layer having means for holding printed data; and a substantially transparent recording layer having means for storing optical data, formed on said base layer, said means for storing optical data comprising a plurality of pits formed in said recording layer for diffraction of a light beam.
Claim 3
Dependent Claim
36 words
An optical card to record and reproduce optical data according to claim 1, wherein said means for holding printed data comprises a light-absorbing layer coated on said base layer, on which said printed data is marked.
Claim 4
Dependent Claim
72 words
An optical card to record and reproduce optical data claimed 2, wherein said printed data is marked by an ink having a reflectivity virtually identical to a reflectivity of said light-absorbing layer in a visible wavelength light, and wherein said ink has reflective characteristics differing from the reflectivity of said light-absorbing layer in an invisible wavelength light, so that said printed data can be detected by a light within said invisible wavelength.
Claim 5
Dependent Claim
17 words
An optical card to record and reproduce optical data claimed 1, wherein said printed data is visible.
Claim 6
Dependent Claim
75 words
An optical card system comprising: an optical card including: a base layer having means for holding printed data; a substantially transparent recording layer having means for storing optical data, formed on said base layer, said means for storing optical data comprising a plurality of pits formed in said recording layer for diffraction of a light beam; and an optical card reader, having means for scanning said printed data and generating a binary data corresponding thereto.
Claim 7
Dependent Claim
75 words
An optical card system comprising: an optical card including: a base layer having means for holding printed data; a substantially transparent recording layer having means for storing optical data, formed on said base layer, said means for storing optical data comprising a plurality of pits formed in said recording layer for diffraction of a light beam; and an optical card reader, having means for scanning said printed data and generating a binary data corresponding thereto.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-24 | 1998-10-24 | 1999-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-24 | 2002-10-24 | 2003-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-24 | 2006-10-24 | 2007-04-25 | $7700.00 | Window Closed / Lapsed |