US4927681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical information recording medium providing reflected light at two different wavelengths
Assignee: Pioneer Corp
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Filing: 1989-03-23
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Granted: 1990-05-22
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Expires: 2009-03-23
Abstract
Abstract Recording medium having islands of light-emitting material in regions formed between a transparent substrate, and a reflective layer disposed on one principal surface thereof. The islands of light-emitting material are sensitive to illuminating light incident thereupon, and in response thereto, emit light having a different wavelength than said illuminating light. Reproducing apparatus separates an overall reflected light from the recording medium into first reflected light corresponding to a reflected scanning light, and second reflected light corresponding to emitted light from the light emitting material.
Inventors
- 👤 Kiyofumi Chikuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:45
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/004; G11B7/005; G11B7/0052; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
86 words
An optical information recording medium comprising: transparent substrate means; reflective layer means provided on a first principal surface of said substrate means; and island means of light-emitting material formed between said substrate means and said reflective layer means, said island means being sensitive to illuminating light incident thereupon, and in response thereto, for producing emitting light having a different wavelength than said illuminating light, said recording medium being adapted such that a recording information surface corresponds to an array of said island means of light-emitting material.
Claim 2
Dependent Claim
86 words
An optical information recording medium comprising: transparent substrate means; reflective layer means provided on a first principal surface of said substrate means; and island means of light-emitting material formed between said substrate means and said reflective layer means, said island means being sensitive to illuminating light incident thereupon, and in response thereto, for producing emitting light having a different wavelength than said illuminating light, said recording medium being adapted such that a recording information surface corresponds to an array of said island means of light-emitting material.
Claim 3
Dependent Claim
28 words
An optical information recording medium according to claim 1, wherein said island means being sensitive to illuminating light incident upon a second principal surface of said substrate means.
Claim 4
Dependent Claim
17 words
An optical information recording medium according to claim 1, wherein said light-emitting material is a photoluminescent material.
Claim 5
Dependent Claim
17 words
An optical information recording medium according to claim 1, wherein said light-emitting material is a fluorescent dye.
Claim 6
Dependent Claim
16 words
An optical information recording medium according to claim 1, wherein said light-emitting material is a phosphor.
Claim 7
Dependent Claim
19 words
An optical information recording medium according to claim 3, wherein said transparent substrate means is made of a resin.
Claim 8
Dependent Claim
20 words
An optical information recording medium according to claim 6, wherein said transparent substrate means is more specifically an acrylic resin.
Claim 9
Dependent Claim
20 words
An optical information recording medium according to claim 6, wherein said transparent substrate means is more specifically a polycarbonate resin.
Claim 10
Dependent Claim
18 words
An optical information recording medium according to claim 6, wherein said recording medium corresponds to a compact disk.
Claim 11
Dependent Claim
18 words
An optical information recording medium according to claim 6, wherein said recording medium corresponds to a video disk.
Claim 12
Dependent Claim
18 words
An optical information recording medium according to claim 6, wherein said recording medium corresponds to an optical card.
Claim 13
Dependent Claim
24 words
An optical information recording medium according to claim 9, wherein said island means of light-emitting material are arrayed in a spiral or concentric form.
Claim 14
Dependent Claim
24 words
An optical information recording medium according to claim 10, wherein said island means of light-emitting material are arrayed in a spiral or concentric form.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |