US3106129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for measuring exposure time
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1961-07-17
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Granted: 1963-10-08
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Frenk Helmuth
- 👤 Weber Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:12
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/4209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN AN ARRANGEMENT FOR PHOTOMICROGRAPHY, THE COMBINATION OF A LENS SYSTEM RECEIVING LIGHT FROM AN OBJECT TO THE PHOTOGRAPHED, MEANS FOR CONTINUOUSLY MEASURING A PORTION OF THE LIGHT RECEIVED THROUGH SAID LENS SYSTEM, AN ADJUSTABLE DIAPHRAGM IN THE PATH OF THE LIGHT TO BE MEASURED FOR SELECTING A DEFINED AREA OF THE IMAGE FIELD OF THE OBJECT TO BE PHOTOGRAPHED, AND OPTICAL MEANS IN THE PATH OF THE LIGHT TO BE MEASURED FOR VARYING THE INTENSITY OF SAID LIGHT INVERSELY PROPORTIONAL TO THE AREA OF THE SELECTED IMAGE FIELD.
Claim 2
Dependent Claim
89 words
IN AN ARRANGEMENT FOR PHOTOMICROGRAPHY, THE COMBINATION OF A LENS SYSTEM RECEIVING LIGHT FROM AN OBJECT TO THE PHOTOGRAPHED, MEANS FOR CONTINUOUSLY MEASURING A PORTION OF THE LIGHT RECEIVED THROUGH SAID LENS SYSTEM, AN ADJUSTABLE DIAPHRAGM IN THE PATH OF THE LIGHT TO BE MEASURED FOR SELECTING A DEFINED AREA OF THE IMAGE FIELD OF THE OBJECT TO BE PHOTOGRAPHED, AND OPTICAL MEANS IN THE PATH OF THE LIGHT TO BE MEASURED FOR VARYING THE INTENSITY OF SAID LIGHT INVERSELY PROPORTIONAL TO THE AREA OF THE SELECTED IMAGE FIELD.
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) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |