Patent US3149903A successfully refreshed from Google Patents.
US3149903A
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US
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Optical apparatus
Assignee: Tektronix Inc
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Filing: 1960-12-29
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Granted: 1964-09-22
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Expires: 1980-12-29
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Merrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:28
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/204; G03; G03B; G03B15/00; G03B15/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
OPTICAL APPARATUS COMPRISING MEANS FOR SUPPORTING AN ELEMENT PROVIDING AN OBJECT PLANE, MEANS FOR SUPPORTING AN ELEMENT PROVIDING AN IMAGE PLANE, A LENS STRUCTURE POSITIONED BETWEEN SAID PLANES AND HAVING A LENS SYSTEM FIXED IN POSITION THEREIN, SAID LENS STRUCTURE HAVING AN OBJECT REFERENCE SURFACE AND AN IMAGE REFERENCE SURFACE THEREON, MEANS TO SUPPORT SAID LENS STRUCTURE SO THAT SAID OBJECT REFERENCE SURFACE IS ALWAYS A CONSTANT DISTANCE FROM SAID OBJECT PLANE AND SAID IMAGE REFERENCE SURFACE IS ALWAYS A CONSTANT DISTANCE FROM SAID IMAGE PLANE, SAID REFERENCE SURFACES BEING FIXED IN POSITION AXIALLY OF SAID STRUCTURE AND BEING SEPARATED BY A PREDETERMINED DISTANCE WHICH VARIES WITH DIFFERENT LENS STRUCTURES SO THAT A SERIES OF SAID LENS STRUCTURES HAVING DIFFERENT LENS CHARACTERISTICS AND EACH PROVIDING A PRESET MAGNIFICATION CAN BE INTERCHANGED IN SAID APPARATUS WHILE MAINTAINING SAID OBJECT PLANE FOCUSSED UPON SAID IMAGE PLANE.
Claim 2
Dependent Claim
144 words
OPTICAL APPARATUS COMPRISING MEANS FOR SUPPORTING AN ELEMENT PROVIDING AN OBJECT PLANE, MEANS FOR SUPPORTING AN ELEMENT PROVIDING AN IMAGE PLANE, A LENS STRUCTURE POSITIONED BETWEEN SAID PLANES AND HAVING A LENS SYSTEM FIXED IN POSITION THEREIN, SAID LENS STRUCTURE HAVING AN OBJECT REFERENCE SURFACE AND AN IMAGE REFERENCE SURFACE THEREON, MEANS TO SUPPORT SAID LENS STRUCTURE SO THAT SAID OBJECT REFERENCE SURFACE IS ALWAYS A CONSTANT DISTANCE FROM SAID OBJECT PLANE AND SAID IMAGE REFERENCE SURFACE IS ALWAYS A CONSTANT DISTANCE FROM SAID IMAGE PLANE, SAID REFERENCE SURFACES BEING FIXED IN POSITION AXIALLY OF SAID STRUCTURE AND BEING SEPARATED BY A PREDETERMINED DISTANCE WHICH VARIES WITH DIFFERENT LENS STRUCTURES SO THAT A SERIES OF SAID LENS STRUCTURES HAVING DIFFERENT LENS CHARACTERISTICS AND EACH PROVIDING A PRESET MAGNIFICATION CAN BE INTERCHANGED IN SAID APPARATUS WHILE MAINTAINING SAID OBJECT PLANE FOCUSSED UPON SAID IMAGE PLANE.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |