Patent US3604802A successfully refreshed from Google Patents.
US3604802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide angle photoelectric position detecting device utilizing a conical truncated optical condenser
Assignee: Tokyo Optical Co Ltd
•
Filing: 1969-02-04
•
Granted: 1971-09-14
•
Expires: 1989-02-04
Abstract
Abstract A wide angle photoelectric position detecting device having a truncated conical shape optical condenser interposed between an objective lens means with a widened field of view and a photoelectric transducer means. The position detecting device delivers energy from a light or heat source in the widened field of view onto a light receiving surface of said photoelectric transducer element without causing any divergence thereof.
Inventors
- 👤 Shigeru Ohmori
- 👤 Yoshio Ishida
- 👤 Harumi Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:18
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A wide angle photoelectric position detecting device, comprising an objective lens means having a widened field of view, a photoelectric transducer element for receiving light beams from said objective lens means and for producing output signals in response to incidence of said light beams thereon, a truncated conical-shape optical condenser disposed adjacent to said photoelectric transducer element, a condenser lens disposed between said objective lens means and said truncated conicalshape condenser, and a reflecting mirror providing a cylindrical interior reflecting surface and located between said truncated conical-shape condenser and said photoelectric transducer element, whereby the energy from a radiating source in the said widened field of view of said objective lens means is projected onto a light-receiving surface of said photoelectric transducer element without causing any divergence thereof.
Claim 2
Dependent Claim
128 words
A wide angle photoelectric position detecting device, comprising an objective lens means having a widened field of view, a photoelectric transducer element for receiving light beams from said objective lens means and for producing output signals in response to incidence of said light beams thereon, a truncated conical-shape optical condenser disposed adjacent to said photoelectric transducer element, a condenser lens disposed between said objective lens means and said truncated conicalshape condenser, and a reflecting mirror providing a cylindrical interior reflecting surface and located between said truncated conical-shape condenser and said photoelectric transducer element, whereby the energy from a radiating source in the said widened field of view of said objective lens means is projected onto a light-receiving surface of said photoelectric transducer element without causing any divergence thereof.
References Cited (Backward Citations)
US3062964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |