US3357769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical viewing apparatus
Assignee: Individual
•
Filing: 1965-02-09
•
Granted: 1967-12-12
•
Expires: 1985-02-09
Abstract
No abstract record available.
Inventors
- 👤 Kenneth B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:40
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0884; G02B27/00; G02B27/01; G02B27/0101; G02B27/0149; G02B2027/0154; G02B2027/0169
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A CAMERA LUDICA DEVICE, COMPRISING: A CONCAVE, SUBSTANTIALLY SPHERICAL MIRROR; A HEMISPHERICAL LENS-PRISM HAVING A PLANAR REFLECTING FACE PASSING THROUGH THE COMMON CENTER OF CURVATURE OF THE LENS SURFACE FOR PRODUCING A REAL IMAGE BY REFRACTION AND REFLECTION SUBSTANTIALLY COINCIDENT WITH THE PRINCIPAL FOCAL SURFACE OF SAID MIRROR, SAID LENSPRISM HAVING A FIELD CURVATURE RADIUS SUBSTANTIALLY EQUAL TO THE FIELD CURVATURE RADIUS OF SAID MIRROR, THE APERTURE STOP OF SAID LENS-PRISM BEING LOCATED SUBSTANTIALLY AT THE CENTER OF CURVATURE OF SAID MIRROR; A PARTIALLY REFLECTING, PARTIALLY TRANSMITTING BEAMSPLITTER INTERSECTING THE OPTICAL AXIS BETWEEN SAID LENS-PRISM AND SAID MIRROR; AND A RIGHT ANGLE PRISM FOR REFLECTING LIGHT FROM A SUBJECT TO SAID LENS-PRISM.
Claim 2
Dependent Claim
112 words
A CAMERA LUDICA DEVICE, COMPRISING: A CONCAVE, SUBSTANTIALLY SPHERICAL MIRROR; A HEMISPHERICAL LENS-PRISM HAVING A PLANAR REFLECTING FACE PASSING THROUGH THE COMMON CENTER OF CURVATURE OF THE LENS SURFACE FOR PRODUCING A REAL IMAGE BY REFRACTION AND REFLECTION SUBSTANTIALLY COINCIDENT WITH THE PRINCIPAL FOCAL SURFACE OF SAID MIRROR, SAID LENSPRISM HAVING A FIELD CURVATURE RADIUS SUBSTANTIALLY EQUAL TO THE FIELD CURVATURE RADIUS OF SAID MIRROR, THE APERTURE STOP OF SAID LENS-PRISM BEING LOCATED SUBSTANTIALLY AT THE CENTER OF CURVATURE OF SAID MIRROR; A PARTIALLY REFLECTING, PARTIALLY TRANSMITTING BEAMSPLITTER INTERSECTING THE OPTICAL AXIS BETWEEN SAID LENS-PRISM AND SAID MIRROR; AND A RIGHT ANGLE PRISM FOR REFLECTING LIGHT FROM A SUBJECT TO SAID LENS-PRISM.
References Cited (Backward Citations)
US2568327A
Cited
US2738702A
Cited
US2801566A
Cited
US2923220A
Cited
US3215032A
Cited
FR1310463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |