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US4025165A
Expired / Lapsed
US
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Electro optical imaging device
Assignee: Yeda Research and Development Co Ltd
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Filing: 1975-09-30
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Granted: 1977-05-24
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Expires: 1995-09-30
Abstract
Abstract The present invention relates to an electro-optical imaging device containing as transducer a foil electret, having a transparent conducting backplate.
Inventors
- 👤 Bruce D. Sollish
- 👤 Ephraim H. Frei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:22
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/24; G01N29/2406; G01H; G01H3/00; G01H3/10; G01H3/12; G01H3/125; G01N29/04; G01N29/06; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/8965; G01S15/897; G01S15/8972
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
50 words
In an acoustic-to-optical imaging device having a transducer responsive to an acoustic beam applied to one surface thereof and means for producing a viewable image, the improvement comprising as the transducer therein a foil electret, having an optically transparent conducting backplate as one of its electrodes and a second electrode.
Claim 2
Dependent Claim
50 words
In an acoustic-to-optical imaging device having a transducer responsive to an acoustic beam applied to one surface thereof and means for producing a viewable image, the improvement comprising as the transducer therein a foil electret, having an optically transparent conducting backplate as one of its electrodes and a second electrode.
Claim 3
Dependent Claim
21 words
An improved acoustic-to-optical device according to claim 1, wherein said electret has a foil of varying density in its thickness direction.
Claim 4
Dependent Claim
27 words
An improved acoustic-to-optical imaging device according to claim 1, including means coupled to said electret for supplying pulsed cw readout signals thereto to electronically focus the device.
Claim 5
Dependent Claim
62 words
An improved acoustic-to-optical imaging device according to claim 1, including means for illuminating a surface of said electret through said optically transparent backplate, said means for illuminating including a light source, spatial filtering means and collimation means positioned in reversed serial order from said transducer, and a condensing lens for focussing reflected light from said foil electret to give the desired image.
Claim 6
Dependent Claim
16 words
An improved acoustic-to-optical imaging device according to claim 1, wherein said light source is a laser.
Claim 7
Dependent Claim
65 words
In an acoustic-to-optical imaging device having a transducer responsive to an acoustic beam applied to one surface thereof and means for producing a viewable image, the improvement comprising as the transducer therein an unpolarized dielectric foil electret having an optically transparent conducting backplate as one of its electrodes, a second electrode, and means for applying a d.c. bias voltage across said first and second electrodes.
Claim 8
Dependent Claim
65 words
In an acoustic-to-optical imaging device having a transducer responsive to an acoustic beam applied to one surface thereof and means for producing a viewable image, the improvement comprising as the transducer therein an unpolarized dielectric foil electret having an optically transparent conducting backplate as one of its electrodes, a second electrode, and means for applying a d.c. bias voltage across said first and second electrodes.
Claim 9
Dependent Claim
19 words
An improved acoustic-to-optical device according to claim 6, wherein said foil is of varying density in its thickness direction.
Claim 10
Dependent Claim
27 words
An improved acoustic-to-optical imaging device according to claim 6, including means coupled to said foil for supplying pulsed cw readout signals thereto to electronically focus the device.
Claim 11
Dependent Claim
61 words
An improved acoustic-to-optical imaging device according to claim 6, including means for illuminating a surface of said foil through said optically transparent backplate, said means for illuminating including a light source, spatial filtering means and collimation means positioned in reversed serial order from said transducer, and a condensing lens for focussing reflected light from said foil to give the desired image.
Claim 12
Dependent Claim
16 words
An improved acoustic-to-optical imaging device according to claim 6, wherein said light source is a laser.
Claim 13
Independent Claim
62 words
A method of providing an optical image comprising: positioning a foil electret having an optically transparent conducting backplate in vicinity of possible targets to be imaged; illuminating one surface of said electret with a coherent light beam; illuminating a surface of said electret opposite said one surface with an acoustic beam; and developing an image from light reflected from said one surface.
Claim 14
Independent Claim
62 words
A method of providing an optical image comprising: positioning a foil electret having an optically transparent conducting backplate in vicinity of possible targets to be imaged; illuminating one surface of said electret with a coherent light beam; illuminating a surface of said electret opposite said one surface with an acoustic beam; and developing an image from light reflected from said one surface.
Claim 15
Independent Claim
73 words
A method of providing an optical image comprising: positioning an unpolarized dielectric foil having an optically transparent conducting backplate in the vicinity of possible targets to be imaged; supplying a d.c. voltage to said foil; illuminating one surface of said dielectric foil with a coherent light beam; illuminating a surface of said dielectric foil opposite said one surface with an acoustic beam; and developing an image from light reflected from said one surface.
Claim 16
Independent Claim
73 words
A method of providing an optical image comprising: positioning an unpolarized dielectric foil having an optically transparent conducting backplate in the vicinity of possible targets to be imaged; supplying a d.c. voltage to said foil; illuminating one surface of said dielectric foil with a coherent light beam; illuminating a surface of said dielectric foil opposite said one surface with an acoustic beam; and developing an image from light reflected from said one surface.
References Cited (Backward Citations)
US3736552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |