US3563635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television camera having a thick birefractive plate before the light-splitting system
Assignee: US Philips Corp
•
Filing: 1969-11-12
•
Granted: 1971-02-16
•
Expires: 1989-11-12
Abstract
Abstract A TELEVISION CAMERA EMPLOYING A DICHROIC MIRROR LIGHTSPLITTING SYSTEM AND A BIREFRACTIVE PLATE BETWEEN THE DICHROIC MIRROR AND AN OBJECTIVE LENS FOR PROJECTING AN IMAGE OF A SCENCE IN THE CAMERA TUBES. THE BIREFRACTIVE PLATE IS POSITIONED BETWEEN THE OBJECTIVE LENS AND THE DICHROIC MIRRO AND HAS A THICKNESS SUFFICIENT TO MODIFY POLARIZED LIGHT FROM THE SCENE BEFORE IT IS INCIDENT ON THE DICHROIC MIRROR.
Inventors
- 👤 Hendrik De Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/1006; G02B27/1013; G02B27/14; G02B27/145; G02B5/00; G02B5/30; G02B5/3083
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |