Patent US3577200A successfully refreshed from Google Patents.
US3577200A
Expired / Lapsed
US
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Real-time solid state camera system
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1968-09-12
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Granted: 1971-05-04
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Expires: 1988-09-12
Abstract
Abstract Camera apparatus is disclosed for sensing the pattern of modulation imposed by an electro-optic medium on radiation as a function of the electric field established across the electrooptic medium by the effect of a radiant image projected on a photoconductor medium associated with the electro-optic medium across which mediums an electric field has been established.
Inventors
- 👤 Ralph E Aldrich
- 👤 Paul J Caruso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:22
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
150 words
A real-time solid-state camera system comprising: a photoconductor medium whose conductance varies as a function of the intensity of radiation incident on it; an electro-optic medium, exhibiting a characteristic that varies with variations of an applied electric field, associated with said photoconductor medium, for modulating radiation transmitted by said electro-optic medium as a function of an electric field associated with said mediums; means for exposing said photoconductor medium to a radiant image to vary the conductance of said photoconductor medium in a pattern similar to that radiant image; means for applying across said mediums an electric field which varies at said electro-optic medium as a function of the conductance pattern of said photoconductor medium; means for subjecting said electro-optic medium to radiation; a photosensitive medium; and, second means for exposing said photosensitive medium to a portion of the modulated radiation from said means for subjecting, transmitted by said electro-optic medium.
Claim 2
Dependent Claim
150 words
A real-time solid-state camera system comprising: a photoconductor medium whose conductance varies as a function of the intensity of radiation incident on it; an electro-optic medium, exhibiting a characteristic that varies with variations of an applied electric field, associated with said photoconductor medium, for modulating radiation transmitted by said electro-optic medium as a function of an electric field associated with said mediums; means for exposing said photoconductor medium to a radiant image to vary the conductance of said photoconductor medium in a pattern similar to that radiant image; means for applying across said mediums an electric field which varies at said electro-optic medium as a function of the conductance pattern of said photoconductor medium; means for subjecting said electro-optic medium to radiation; a photosensitive medium; and, second means for exposing said photosensitive medium to a portion of the modulated radiation from said means for subjecting, transmitted by said electro-optic medium.
Claim 3
Dependent Claim
24 words
The system of claim 1 in which said electro-optic medium is a material whose birefringence varies as a function of an applied electric field.
Claim 4
Dependent Claim
29 words
The system of claim 1 in which said photoconductor medium and said electro-optic medium are two separate materials each exhibiting the characteristic of a different one of the mediums.
Claim 5
Dependent Claim
30 words
The system of claim 1 further including means for simultaneously directing the radiant image from said means for exposing and radiation from said means for subjecting to said electro-optic medium.
Claim 6
Dependent Claim
30 words
The system of claim 1 in which said means for exposing includes lens means for gathering radiation from an object and projecting the radiant image thereof to said photoconductor medium.
Claim 7
Dependent Claim
17 words
The system of claim 1 in which said means for subjecting includes a source of polarized radiation.
Claim 8
Dependent Claim
16 words
The system of claim 1 in which said means for subjecting includes laser source of radiation.
Claim 9
Dependent Claim
16 words
The system of claim 6 in which said source of polarized radiation includes circular polarizing means.
Claim 10
Dependent Claim
25 words
The system of claim 1 in which said means for applying an electric field includes a pair of electrodes and a source of electric power.
Claim 11
Dependent Claim
14 words
The system of claim 1 in which said photosensitive medium includes a photoelectric cell.
Claim 12
Dependent Claim
24 words
The system of claim 1 in which said means for subjecting scans said photoconductor medium with a beam of radiation in a predetermined raster.
Claim 13
Dependent Claim
16 words
The system of claim 1 in which said second means for exposing includes a circular analyzer.
Claim 14
Dependent Claim
31 words
The system of cLaim 1 in which said photoconductor medium absorbs substantially all the radiation of the radiant image and absorbs substantially none of the radiation from said means for subjecting.
References Cited (Backward Citations)
US3306977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |