Patent US3800908A successfully refreshed from Google Patents.
US3800908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminated acoustic wave device
Assignee: Raytheon Co
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Filing: 1973-03-26
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Granted: 1974-04-02
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Expires: 1993-03-26
Abstract
Abstract An acoustic wave device wherein a termination is mounted on an acoustic wave medium in order to attenuate reflected acoustic wave energy. The device incorporates a thermal isolation layer between the medium and the termination to prevent heat generated in the termination from reaching the medium and causing undesirable consequences.
Inventors
- 👤 M Wauk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/11; G02F2203/00; G02F2203/60
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
80 words
An acoustic wave device, comprising: a medium capable of supporting acoustic waves; transducer means mounted on said medium for propagating acoustic wave energy in said medium; terminating means mounted on said medium in the path of said energy for absorbing said energy; heat sink means mounted on said terminating means for extracting heat therefrom; and thermal isolation means disposed intermediate said medium and said terminating means for limiting the amount of thermal energy reaching said medium from said terminating means.
Claim 2
Dependent Claim
80 words
An acoustic wave device, comprising: a medium capable of supporting acoustic waves; transducer means mounted on said medium for propagating acoustic wave energy in said medium; terminating means mounted on said medium in the path of said energy for absorbing said energy; heat sink means mounted on said terminating means for extracting heat therefrom; and thermal isolation means disposed intermediate said medium and said terminating means for limiting the amount of thermal energy reaching said medium from said terminating means.
Claim 3
Dependent Claim
27 words
The device according to claim 1, wherein said thermal isolation means has a relatively hiGh acoustic energy conducting characteristic and a relatively low thermal energy conducting characteristic.
Claim 4
Dependent Claim
22 words
The device according to claim 2, wherein said thermal isolation means has an acoustic impedance relatively close to that of said medium.
Claim 5
Dependent Claim
16 words
The device according to claim 1, wherein said thermal isolation means is bonded to said medium.
Claim 6
Dependent Claim
22 words
The device according to claim 4, wherein said isolation means is bonded to said medium by a low temperature indium compression bond.
Claim 7
Dependent Claim
11 words
The device according to claim 1, wherein said medium is germanium.
Claim 8
Dependent Claim
20 words
The device according to claim 4, wherein said isolation means is attached to said medium by a thin epoxy bond.
Claim 9
Dependent Claim
24 words
The device according to claim 4, wherein said isolation means is attached to said medium by a compressive bond between two optically flat surfaces.
Claim 10
Dependent Claim
28 words
The device according to claim 4, wherein said isolation means is brought into acoustic contact by a fluid coupling arrangement disposed between said isolation means and said medium.
Claim 11
Dependent Claim
29 words
The device according to claim 1 wherein said thermal isolation means is a single rutile crystal, and wherein said terminating means is copper layer electroplated on said rutile crystal.
Claim 12
Dependent Claim
13 words
The device according to claim 6, wherein said thermal isolation means is rutile.
Claim 13
Dependent Claim
16 words
The device according to claim 1, wherein said heat sink means is a fluid heat extractor.
Claim 14
Dependent Claim
16 words
The device according to claim 1, wherein said heat sink means is a finned copper structure.
Claim 15
Dependent Claim
20 words
The device according to claim 1, wherein said transducer means includes a block of piezoelectric material bonded to the medium.
Claim 16
Dependent Claim
18 words
The device according to claim 1, wherein said transducer means includes piezoelectric material vacuum deposited on said medium.
Claim 17
Dependent Claim
13 words
The device according to claim 1, wherein said device is an acousto-optic modulator.
Claim 18
Dependent Claim
13 words
The device according to claim 1, wherein said device is an acousto-optic deflector.
Claim 19
Dependent Claim
12 words
The device according to claim 1, wherein said device is a filter.
References Cited (Backward Citations)
US3564459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |