US3562785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image adjusting method
Assignee: AFP ACQUISITION Corp
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Filing: 1968-11-20
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Granted: 1971-02-09
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Expires: 1988-11-20
Abstract
Abstract MEASUREMENT OF THE DEGREE OF FOCUS OF AN IMAGE WHEREIN A PAIR OF LIGHT SENSITIVE ELEMENTS ARE EXPOSED TO THE IMAGE. IN A FIRST EMBODIMENT, A PAIR OF PHOTOCONDUCTIVE ELEMENTS ARE PHYSICALLY POSITIONED IN DIFFERENT FOCAL PLANES WHILE, IN A SECOND EMBODIMENT, A LIGHT DIFFUSING MEDIUM IS ASSOCIATED WITH ONE OF A PAIR OF PHOTOSENSITIVE ELEMENTS WHEREBY THAT ELEMENT WILL RECEIVE ONLY AVERAGE OR BACKGROUND ILLUMINATION. IN BOTH EMBODIMENTS, AS THE DEGREE OF FOCUS OF IMAGE IS VARIED, AN ELECTRICAL OUTPUT SIGNAL COMMENSURATE WITH FOCUS WILL BE GENERATED.
Inventors
- 👤 Dwin R Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:04
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |