US3951663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic volume phase holographic recording media comprising an α di-ketone
Assignee: RCA Corp
•
Filing: 1973-10-04
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Granted: 1976-04-20
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Expires: 1993-10-04
Abstract
Abstract Certain light sensitive α-diketones dissolved in a cured light-insensitive transparent polymer host form recording media useful for recording volume phase holograms.
Inventors
- 👤 Daniel Louis Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/109
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A medium for recording volume phase holograms consisting essentially of a cured, insoluble, transparent light-insensitive polymeric host selected from the group consisting of acrylic polyesters and epoxy resins containing a soluble light-sensitive α-diketone having the formula ##EQU7## wherein R 1 and R 2 independently can be an aliphatic or aromatic hydrocarbon radical or together can form a carbocyclic ring, in an amount sufficient to cause a change in the index of refraction in the medium when illuminated by a spacially modulated coherent light beam having a wavelength corresponding to the absorption band wavelength tail of the α-diketone.
Claim 2
Independent Claim
97 words
A medium for recording volume phase holograms consisting essentially of a cured, insoluble, transparent light-insensitive polymeric host selected from the group consisting of acrylic polyesters and epoxy resins containing a soluble light-sensitive α-diketone having the formula ##EQU7## wherein R 1 and R 2 independently can be an aliphatic or aromatic hydrocarbon radical or together can form a carbocyclic ring, in an amount sufficient to cause a change in the index of refraction in the medium when illuminated by a spacially modulated coherent light beam having a wavelength corresponding to the absorption band wavelength tail of the α-diketone.
Claim 3
Dependent Claim
14 words
A recording medium according to claim 1 wherein the host is an acrylic polyester.
Claim 4
Dependent Claim
20 words
A recording medium according to claim 1 wherein the host is an epoxy resin derived from epichlorohydrin and Bisphenol A.
Claim 5
Dependent Claim
18 words
A recording medium according to claim 1 wherein the host is an epoxy resin derived from maleic anhydride.
Claim 6
Dependent Claim
12 words
A recording medium according to claim 2 wherein the α-diketone is 2,3-pentanedione.
Claim 7
Dependent Claim
12 words
A recording medium according to claim 2 wherein the α-diketone is camphorquinone.
Claim 8
Dependent Claim
12 words
A recording medium according to claim 3 wherein the α-diketone is camphorquinone.
Claim 9
Dependent Claim
12 words
A recording medium according to claim 4 wherein the α-diketone is camphorquinone.
References Cited (Backward Citations)
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Cited
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US3658526A
Cited
US3809686A
Cited
US3707371A
Cited
US3764333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |