US3173012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescope system for simultaneously viewing two superposed images of the same objectat different magnifications
Assignee: Optische Industrie de Oude Delft NV
•
Filing: 1962-12-18
•
Granted: 1965-03-09
•
Expires: 1982-12-18
Abstract
No abstract record available.
Inventors
- 👤 Winter Hermanus Gerhardus De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:19
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12; G02B15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A TELESCOPE SYSTEM FOR SIMULTANEOUSLY VIEWING TWO SUPERPOSED IMAGES OF A SAME OBJECT AT DIFFERENT MAGNIFICATIONS, SAID SYSTEM COMPRISING FIRST AND SECOND OPTICAL OBJECTIVE SUPERPOSED IMAGES IN SAID FOCAL PLANE AND MEANS FORMING SUPERPOSED IMAGES IN SAID FOCAL PLANE AND MEANS FOR VIEWING AND SUPERPOSED IMAGES, SAID FIRST OBJECTIVE SYSTEM BEING CATADIOPTRIC AND COMPRISING IN OPTICAL ALIGNMENT A CONCAVE PRIMARY MIRROR, A SECONDARY MIRROR IN FRONT OF AND FACING SAID PRIMARY MIRROR AND HAVING A CENTRAL APERTURE, AND REFRACTIVE ABERRATION CORRECTING LENS MEANS AIR SPACED FROM SAID PRIMARY MIRROR, SAID SECOND OPTICAL OBJECTIVE SYSTEM BEING DIOPTRIC AND COMPRISING IN AXIAL ALIGNMENT WITH SAID CATADIOPTRIC SYSTEM, A FIRST OBJECTIVE LENS, LOCATED A DISTANCE IN FRONT OF SAID COMMON FOCAL PLANE LONGER THEN THE FOCAL LENGTH OF SAID FIRST OBJECTIVE LENS, AND MEANS INCLUDING AT LEAST ONE FURTHER OBJECTIBE LENS TO PROJECT AN IMAGE OF THE FOCAL PLANE OF SAID FIRST OBJECTIVE LENS ONTO SAID COMMON FOCAL PLANE, SAID DIOPTRIC SYSTEM EXTENDING THROUGH SAID CENTRAL APERTURE OF SAID SECONDARY MIRROR.
Claim 2
Dependent Claim
168 words
A TELESCOPE SYSTEM FOR SIMULTANEOUSLY VIEWING TWO SUPERPOSED IMAGES OF A SAME OBJECT AT DIFFERENT MAGNIFICATIONS, SAID SYSTEM COMPRISING FIRST AND SECOND OPTICAL OBJECTIVE SUPERPOSED IMAGES IN SAID FOCAL PLANE AND MEANS FORMING SUPERPOSED IMAGES IN SAID FOCAL PLANE AND MEANS FOR VIEWING AND SUPERPOSED IMAGES, SAID FIRST OBJECTIVE SYSTEM BEING CATADIOPTRIC AND COMPRISING IN OPTICAL ALIGNMENT A CONCAVE PRIMARY MIRROR, A SECONDARY MIRROR IN FRONT OF AND FACING SAID PRIMARY MIRROR AND HAVING A CENTRAL APERTURE, AND REFRACTIVE ABERRATION CORRECTING LENS MEANS AIR SPACED FROM SAID PRIMARY MIRROR, SAID SECOND OPTICAL OBJECTIVE SYSTEM BEING DIOPTRIC AND COMPRISING IN AXIAL ALIGNMENT WITH SAID CATADIOPTRIC SYSTEM, A FIRST OBJECTIVE LENS, LOCATED A DISTANCE IN FRONT OF SAID COMMON FOCAL PLANE LONGER THEN THE FOCAL LENGTH OF SAID FIRST OBJECTIVE LENS, AND MEANS INCLUDING AT LEAST ONE FURTHER OBJECTIBE LENS TO PROJECT AN IMAGE OF THE FOCAL PLANE OF SAID FIRST OBJECTIVE LENS ONTO SAID COMMON FOCAL PLANE, SAID DIOPTRIC SYSTEM EXTENDING THROUGH SAID CENTRAL APERTURE OF SAID SECONDARY MIRROR.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |