US3330615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zoom lens
Assignee: Eastman Kodak Co
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Filing: 1963-05-06
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Granted: 1967-07-11
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Expires: 1983-05-06
Abstract
No abstract record available.
Inventors
- 👤 William H Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:59
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A ZOOM LENS SYSTEM WITH A GEOMETRICAL MEAN FOCAL LENGTH F, COMPRISING IN OPTICAL ALIGNMENT A FRONT ZOOMING MEMBER AND A REAR RELAY OBJECTIVE MEMBER, SAID FRONT ZOOMING MEMBER COMPRISING THREE COMPONENTS, THE FRONT FIRST COMPONENT BEING A DOUBLET OF LENS ELEMENTS I AND II AND THE SECOND AND THIRD COMPONENTS BEING SINGLE LENS ELEMENTS III AND IV, THE FIRST AND THIRD COMPONENTS BEING COUPLED TO EACH OTHER AT AN AXIAL DISTANCE OF SUBSTANTIALLY 1.61F FROM EACH OTHER AND AXIALLY MOVABLE AS A UNIT FOR ZOOMING, THE SECOND COMPONENT BEING HELD AT A DISTANCE OF SUBSTANTIALLY 1.77F FROM THE REAR OBJECTIVE, SAID DISTANCE BEING SUBSTANTIALLY CONSTANT WITHIN 0.1F DURING ZOOMING, SAID REAR RELAY OBJECTIVE MEMBER HAVING A FOCAL LENGTH LENGTH OF SUBSTANTIALLY .89F AND COMPRISING THREE SINGLE AIRSPACED LENS ELEMENTS V, VI AND VII, THE SEVEN LENS ELEMENTS HAVING SUBSTANTIALLY THE FOLLOWING SPECIFICATIONS, WHERE R IS THE RADIUS OF CURVATURE OF THE SURFACES, NUMBERED FROM THE FRONT, T AND S ARE THE THICKNESS AND SPACINGS RESPECTIVELY OF THE LENS ELEMENTS NUMBERED FROM THE FRONT. ND IS THE INDEX OF REFLECTION FOR THE D LINE AND V IS THE DISPERSIVE INDEX:
Claim 2
Dependent Claim
190 words
A ZOOM LENS SYSTEM WITH A GEOMETRICAL MEAN FOCAL LENGTH F, COMPRISING IN OPTICAL ALIGNMENT A FRONT ZOOMING MEMBER AND A REAR RELAY OBJECTIVE MEMBER, SAID FRONT ZOOMING MEMBER COMPRISING THREE COMPONENTS, THE FRONT FIRST COMPONENT BEING A DOUBLET OF LENS ELEMENTS I AND II AND THE SECOND AND THIRD COMPONENTS BEING SINGLE LENS ELEMENTS III AND IV, THE FIRST AND THIRD COMPONENTS BEING COUPLED TO EACH OTHER AT AN AXIAL DISTANCE OF SUBSTANTIALLY 1.61F FROM EACH OTHER AND AXIALLY MOVABLE AS A UNIT FOR ZOOMING, THE SECOND COMPONENT BEING HELD AT A DISTANCE OF SUBSTANTIALLY 1.77F FROM THE REAR OBJECTIVE, SAID DISTANCE BEING SUBSTANTIALLY CONSTANT WITHIN 0.1F DURING ZOOMING, SAID REAR RELAY OBJECTIVE MEMBER HAVING A FOCAL LENGTH LENGTH OF SUBSTANTIALLY .89F AND COMPRISING THREE SINGLE AIRSPACED LENS ELEMENTS V, VI AND VII, THE SEVEN LENS ELEMENTS HAVING SUBSTANTIALLY THE FOLLOWING SPECIFICATIONS, WHERE R IS THE RADIUS OF CURVATURE OF THE SURFACES, NUMBERED FROM THE FRONT, T AND S ARE THE THICKNESS AND SPACINGS RESPECTIVELY OF THE LENS ELEMENTS NUMBERED FROM THE FRONT. ND IS THE INDEX OF REFLECTION FOR THE D LINE AND V IS THE DISPERSIVE INDEX:
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |