US4339513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and recording media for continuous wave four-level, two-photon holography
Assignee: International Business Machines Corp
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Filing: 1980-11-20
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Granted: 1982-07-13
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Expires: 2000-11-20
Abstract
Abstract A process and recording medium for four-level, two-photon holography are provided. These media are particularly useful for recording holograms using continuous wave lasers. The recording medium is formed by a transport resin containing a tetrazine compound.
Inventors
- 👤 David C. Alvarez
- 👤 Gary C. Bjorklund
- 👤 Donald M. Burland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:49
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G02; G02F; G02F1/00; G02F1/35; G02F1/3526; G03C1/733; G03F; G03F7/00; G03F7/0005; G03F7/001; G03H; G03H1/00; G03H1/02; G11; G11B; G11B7/00; G11B7/004; G11B7/0065; G03H2001/026; G03H2001/0264; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
22 words
A recording medium for holography, said medium comprising a transparent resin containing from 10 -5 to 0.1 gram/cc of a tetrazine compound.
Claim 2
Dependent Claim
22 words
A recording medium for holography, said medium comprising a transparent resin containing from 10 -5 to 0.1 gram/cc of a tetrazine compound.
Claim 3
Dependent Claim
14 words
A medium as claimed in claim 1 wherein the tetrazine compound is a 3,6-dialkyl-1,2,4,5-tetrazine.
Claim 4
Dependent Claim
13 words
A medium as claimed in claim 1 wherein the tetrazine compound is 3,6-dimethyl-1,2,4,5-tetrazine.
Claim 5
Dependent Claim
25 words
A medium as claimed in claim 1 wherein the tetrazine compound is present at a concentration of from about 0.05 gram/cc to about 0.1 gram/cc.
Claim 6
Dependent Claim
13 words
A medium as claimed in claim 1 wherein the transparent resin is polyvinylcarbazole.
Claim 7
Dependent Claim
24 words
A recording medium for continuous wave two-photon holography comprising polyvinylcarbazole resin containing 3,6-dimethyl-1,2,4,5-tetrazine at a concentration of about 0.05 to 0.1 gram per cc.
Claim 8
Dependent Claim
24 words
A recording medium for continuous wave two-photon holography comprising polyvinylcarbazole resin containing 3,6-dimethyl-1,2,4,5-tetrazine at a concentration of about 0.05 to 0.1 gram per cc.
Claim 9
Dependent Claim
68 words
A process for two-photon, four-level holographic recording, said process comprising the steps of: (1) shining a single beam of light of frequency ω 1 upon a four-level holographic recording medium, and (2) exposing the recording medium to laser light at frequency ω 2 , thereby forming a holographic interference pattern in the recording medium and changing the index of refraction and/or the absorption coefficient of said recording medium.
Claim 10
Dependent Claim
68 words
A process for two-photon, four-level holographic recording, said process comprising the steps of: (1) shining a single beam of light of frequency ω 1 upon a four-level holographic recording medium, and (2) exposing the recording medium to laser light at frequency ω 2 , thereby forming a holographic interference pattern in the recording medium and changing the index of refraction and/or the absorption coefficient of said recording medium.
Claim 11
Dependent Claim
14 words
A process as claimed in claim 7 wherein ω 1 equals ω 2 .
Claim 12
Dependent Claim
16 words
A process as claimed in claim 7 wherein ω 1 does not equal ω 2 .
Claim 13
Dependent Claim
16 words
A process as claimed in claim 7 wherein the light is from a continuous wave laser.
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) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |