US3137761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope illuminator for large aperture and illumination field ranges
Assignee: Carl Zeiss AG
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Filing: 1961-03-31
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Granted: 1964-06-16
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 Conradi Rudolf
- 👤 Dopp Paul
- 👤 Habermann Ewald
- 👤 Zieher Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:49
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06; G02B21/08; G02B21/12; G02B21/086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A DEVICE FOR ILLUMINATING A SPECIMEN SLIDE IN A MICROSCOPE WHICH ALTERNATELY USES HIGH AND LOW POWER OBJECTIVES, SAID DEVICE BEING ADAPTED TO PRODUCE AN ALTERNATING ILLUMINATION IN THE SENSE OF CHANGING FROM HIGH APERTURES AND SMALL ILLUMINATING FIELDS TO SMALL APERTURES AND LARGE ILLUMINATING FIELDS, AND COMPRISING A LIGHT SOURCE, A FIXEDLY MOUNTED COLLECTOR LENS SYSTEM ARRANGED ADJACENT SAID LIGHT SOURCE AND CONSISTING OF TWO AXIALLY ALIGNED LENSES, A FIELD DIAPHRAGM THROUGH WHICH THE LIGHT COMING FROM SAID COLLECTOR LENS SYSTEM PASSES, SAID SPECIMEN SLIDE BEING ARRANGED IN THE PATH OF THE LIGHT BEAM PASSING THROUGH SAID COLLECTOR LENS SYSTEM AND THROUGH A FIXEDLY MOUNTED CONDENSER WHICH LATTER CONSISTS OF A PLURALITY OF AXIALLY ALIGNED LENSES WHICH ARE PLACED ONE NEXT TO THE OTHER AND DIRECTLY IN FRONT OF SAID SPECIMEN SLIDE, AT LEAST ONE OF SAID PLURALITY OF LENSES CONSISTING OF A CONVERGING LENS, WHEREBY AN IMAGE OF SAID FIELD DIAPHRAGM IS PROJECTED INTO THE PLANE OF SAID SPECIMEN SLIDE, A REMOVABLE APERTURE DIAPHRAGM ARRANGED IN AXIALLY SPACED RELATION FROM SAID FIELD DIAPHRAGM AND BETWEEN THE LATTER AND SAID CONDENSER, AND MEANS FOR SELECTIVE INSERTION INTO THE PATH OF THE LIGHT BEAM BETWEEN SAID FIELD DIAPHRAGM
Claim 2
Independent Claim
198 words
A DEVICE FOR ILLUMINATING A SPECIMEN SLIDE IN A MICROSCOPE WHICH ALTERNATELY USES HIGH AND LOW POWER OBJECTIVES, SAID DEVICE BEING ADAPTED TO PRODUCE AN ALTERNATING ILLUMINATION IN THE SENSE OF CHANGING FROM HIGH APERTURES AND SMALL ILLUMINATING FIELDS TO SMALL APERTURES AND LARGE ILLUMINATING FIELDS, AND COMPRISING A LIGHT SOURCE, A FIXEDLY MOUNTED COLLECTOR LENS SYSTEM ARRANGED ADJACENT SAID LIGHT SOURCE AND CONSISTING OF TWO AXIALLY ALIGNED LENSES, A FIELD DIAPHRAGM THROUGH WHICH THE LIGHT COMING FROM SAID COLLECTOR LENS SYSTEM PASSES, SAID SPECIMEN SLIDE BEING ARRANGED IN THE PATH OF THE LIGHT BEAM PASSING THROUGH SAID COLLECTOR LENS SYSTEM AND THROUGH A FIXEDLY MOUNTED CONDENSER WHICH LATTER CONSISTS OF A PLURALITY OF AXIALLY ALIGNED LENSES WHICH ARE PLACED ONE NEXT TO THE OTHER AND DIRECTLY IN FRONT OF SAID SPECIMEN SLIDE, AT LEAST ONE OF SAID PLURALITY OF LENSES CONSISTING OF A CONVERGING LENS, WHEREBY AN IMAGE OF SAID FIELD DIAPHRAGM IS PROJECTED INTO THE PLANE OF SAID SPECIMEN SLIDE, A REMOVABLE APERTURE DIAPHRAGM ARRANGED IN AXIALLY SPACED RELATION FROM SAID FIELD DIAPHRAGM AND BETWEEN THE LATTER AND SAID CONDENSER, AND MEANS FOR SELECTIVE INSERTION INTO THE PATH OF THE LIGHT BEAM BETWEEN SAID FIELD DIAPHRAGM
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |