EP0042307A2
Expired / Lapsed
EP
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An optical recording element and a method of recording information using the element
Assignee: Eastman Kodak Co
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Filing: 1981-06-17
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Granted: —
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Expires: 2001-06-17
Abstract
Abstract An optical recording element suitable for recording information encoded on a high energy-density radiation beam comprises an improved thermal- and mechanical- barrier layer (30) coated on a heat-deformable recording layer (20). The barrier layer is preferably at least 0.15 µm thick and comprises a water-soluble polymer having a glass transition temperature when dry of at least 100°C, preferably at least 150 °C. The barrier layer is easily coated and does not significantly degrade the performance of the element. Optional layers such as a spacer layer (32) and a topcoat layer (34) may be coated on the barrier layer.
Inventors
- 👤 Kenneth Robert Hollister
- 👤 Harold Todd Thomas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:40
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/257; G11B7/2572; G11B7/2575; G11B7/242; G11B7/244; G11B7/246; G11B7/254; G11B7/2542; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10S430/162
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
An optical recording element comprising a support having thereon a heat-deformable recording layer and at least one substantially transparent thermal- and mechanical- barrier layer coated over said recording layer characterized in that said barrier layer comprises a water-soluble polymer having a glass transition temperature (Tg) of at least 100°C when dry.
Claim 2
Dependent Claim
51 words
An optical recording element comprising a support having thereon a heat-deformable recording layer and at least one substantially transparent thermal- and mechanical- barrier layer coated over said recording layer characterized in that said barrier layer comprises a water-soluble polymer having a glass transition temperature (Tg) of at least 100°C when dry.
Claim 3
Dependent Claim
20 words
An optical recording element according to claim 1, characterized in that said barrier layer is at least 0.15 µm thick.
Claim 4
Dependent Claim
28 words
An optical recording element according to claim 1 or 2, characterized in that the polymer of said barrier layer has a T when dry of at least 150°C.
Claim 5
Dependent Claim
32 words
An optical recording element according to any of Claims 1 to 3, characterized in that the polymer of said barrier layer is poly(sodium 2-acrylamido-2-methylpropanesulphonate); poly(2-methyl-l-vinylimidazole); poly(l-vinylimidazole); poly(styrenesulphonic acid, sodium salt) or poly(acrylamide).
Claim 6
Dependent Claim
19 words
An optical recording element according to claim 1, characterized in that the polymer of said barrier layer is crosslinked.
Claim 7
Dependent Claim
46 words
An optical recording element according to any of claims 1 to 5 further characterized in that said element has a transparent spacer layer coated over said barrier layer and that the combined thickness of said barrier layer and said spacer layer is greater than 0.1 mm.
Claim 8
Dependent Claim
16 words
An optical recording element according to claim 6, characterized in that said spacer layer is water-impermeable.
Claim 9
Dependent Claim
17 words
An optical recording element according to claim 7, characterized in that said spacer layer comprises cyclized polyisoprene.
Claim 10
Dependent Claim
23 words
An optical recording element according to any of claims 1 to 8 further characterized in that said element has an antistatic topcoat layer.
Claim 11
Independent Claim
57 words
A method of recording information encoded on a high energy-density radiation beam which method comprises focussing the beam on the recording layer of an optical recording element according to any of the preceding claims and scanning the beam in relative motion to the recording layer to produce deformations in the layer which corresponds to the encoded information.
References Cited (Backward Citations)
No citation records indexed.
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