Patent US1939247A successfully refreshed from Google Patents.
US3723934A
Expired / Lapsed
US
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Photosensitive transducer
Assignee: Agfa Gevaert AG
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Filing: 1971-03-23
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Granted: 1973-03-27
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Expires: 1991-03-23
Abstract
Abstract A photosensitive transducer for determining the orientation of light beams having a predetermined diameter has a straight row of transducer portions of identical size but of different sensitivity. Such transducer portions may include differently dimensioned parts of a trumpet-shaped photoconductive layer, or identically dimensioned parts of a photoconductive layer overlapped by filters of different light transmissivity.
Inventors
- 👤 A Kubitzek
- 👤 K Borowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:50
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/783
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A photosensitive transducer, particularly a resistor for evaluation of the orientation of a light beam of predetermined cross-sectional area, comprising a substantially rectangular layer consisting of photoconductive material and extending in a predetermined direction, two current-conducting bodies flanking said layer, and a filter overlying said layer, the light transmissivity of said filter varying in said predetermined direction and portions of said layer and the overlapping portions of said filter constituting a plurality of transducer portions of different sensitivity, said transducer portions of different sensitivity being of equal size and together forming a series extending in said predetermined direction.
Claim 2
Dependent Claim
98 words
A photosensitive transducer, particularly a resistor for evaluation of the orientation of a light beam of predetermined cross-sectional area, comprising a substantially rectangular layer consisting of photoconductive material and extending in a predetermined direction, two current-conducting bodies flanking said layer, and a filter overlying said layer, the light transmissivity of said filter varying in said predetermined direction and portions of said layer and the overlapping portions of said filter constituting a plurality of transducer portions of different sensitivity, said transducer portions of different sensitivity being of equal size and together forming a series extending in said predetermined direction.
Claim 3
Dependent Claim
43 words
A transducer as defined in claim 1, wherein said transducer portions of different sensitivity form a series of successive transducer portions, as considered in said direction, and the sensitivity of said series of successive transducer portions varies in accordance with a predetermined pattern.
Claim 4
Dependent Claim
14 words
A transducer as defined in claim 1, wherein said filter is a grey wedge.
Claim 5
Dependent Claim
18 words
A transducer as defined in claim 1, wherein said transducer portions of different sensitivity form a straight row.
Claim 6
Dependent Claim
18 words
A transducer as defined in claim 1, wherein each of said transducer portions has a substantially circular outline.
Claim 7
Dependent Claim
16 words
A transducer as defined in claim 1, further comprising an insulating support for said transducer portions.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |