US3786757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical lens arrangement
Assignee: Raytheon Co
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Filing: 1972-06-22
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Granted: 1974-01-22
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Expires: 1992-06-22
Abstract
Abstract An improved optical lens arrangement providing arming and detonating signals for a proximity fuse is shown. The illustrated lens arrangement includes a reflecting surface generally in the shape of a right circular cone, such surface effectively being faceted so that two conical detection fields are formed. Also disclosed are logic and control circuits for processing optical signals from targets in either or both detection fields to differentiate between true and spurious targets.
Inventors
- 👤 I Goldstein
- 👤 G Hayward
- 👤 J Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:40
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/02; F42C13/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
In a miSsile incorporating a proximity fuse to control the detonation of ordnance carried by such missile, such fuse including a photodetector means responsive to optical energy received from an airborne target, the improvement comprising: a. optical detection field forming means, such means including a first conical reflecting surface for defining, about an axis of symmetry, a first hollow conical detection field and a second conical reflecting surface for defining a second conical detection field within the first hollow conical detection field; b. means, responsive to optical energy reflected from the first and the second conical reflecting surfaces, for focusing such energy on the photodetector means to produce, respectively, a first and a second electric signal; and c. logic means, responsive to the first electric signal, for producing an arming signal for the proximity fuse and responsive to the second electric signal for producing a detonating signal for the proximity fuse.
Claim 2
Dependent Claim
151 words
In a miSsile incorporating a proximity fuse to control the detonation of ordnance carried by such missile, such fuse including a photodetector means responsive to optical energy received from an airborne target, the improvement comprising: a. optical detection field forming means, such means including a first conical reflecting surface for defining, about an axis of symmetry, a first hollow conical detection field and a second conical reflecting surface for defining a second conical detection field within the first hollow conical detection field; b. means, responsive to optical energy reflected from the first and the second conical reflecting surfaces, for focusing such energy on the photodetector means to produce, respectively, a first and a second electric signal; and c. logic means, responsive to the first electric signal, for producing an arming signal for the proximity fuse and responsive to the second electric signal for producing a detonating signal for the proximity fuse.
Claim 3
Dependent Claim
45 words
The proximity fuse as in claim 1 wherein the first conical reflecting surface is a metallic mirror and the second conical reflecting surface is a dielectric mirror overlying the first conical reflecting surface, such dielectric mirror being opaque to optical energy having a first polarization.
Claim 4
Dependent Claim
28 words
The proximity fuse as in claim 1 wherein the apex angle of the first conical reflecting surface differs from the apex angle of the second conical reflecting surface.
Claim 5
Dependent Claim
38 words
The proximity fuse as in claim 3 wherein the logic means includes means for inhibiting production of an arming and a detonating signal in response to optical energy received simultaneously from the first and the second detection field.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |