US4167328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passive optical range simulator device
Assignee: Westinghouse Electric Corp
•
Filing: 1977-09-28
•
Granted: 1979-09-11
•
Expires: 1997-09-28
Abstract
Abstract An improved passive optical range simulator device used to test the ranging function of the optical radar ranger system by input to a coil of optical fiber having a mirror at its inner terminus that permits such coil to act as an optical delay medium. Improvement resides in inclusion of a partial mirror at the input end of the optical fiber coil to present multiple "target echo" reflections of the laser pulses back to the optical radar ranger system undergoing test.
Inventors
- 👤 Michael A. Cross
- 👤 Fred S. Hurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/48; G01S7/497; G01S7/4972
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
An improved passive optical range simulator device comprising, a housing having testing aperture means for registry with working aperture means of an optical radar ranger system via which optical radar pulses leave and return, means for directing entering and leaving optical radar pulses to and from a common focal spot, a length of optical fiber including a coiled portion and having one end in registry with said focal spot, a total optical radar pulse reflector at the opposite end of said length of optical fiber for enabling same to act as an optical delay medium, and a partial optical radar pulse reflector at the aforesaid one end of said length of optical fiber for generating in such length multiple reflections of an optical radar pulse from the ranger system for observation by such system.
Claim 2
Dependent Claim
134 words
An improved passive optical range simulator device comprising, a housing having testing aperture means for registry with working aperture means of an optical radar ranger system via which optical radar pulses leave and return, means for directing entering and leaving optical radar pulses to and from a common focal spot, a length of optical fiber including a coiled portion and having one end in registry with said focal spot, a total optical radar pulse reflector at the opposite end of said length of optical fiber for enabling same to act as an optical delay medium, and a partial optical radar pulse reflector at the aforesaid one end of said length of optical fiber for generating in such length multiple reflections of an optical radar pulse from the ranger system for observation by such system.
Claim 3
Dependent Claim
33 words
The improved passive optical range simulator device of claim 1, further comprising means for adjusting attenuation of optical radar pulses entering and leaving the aforesaid one end of said length of optical fiber.
Claim 4
Dependent Claim
34 words
The improved passive optical range simulator device of claim 1, further comprising means for adjusting separation between the aforesaid opposite end of said length of optical fiber and said total optical radar pulse reflector.
Claim 5
Dependent Claim
38 words
The improved passive optical range simulator device of claim 1, wherein the length of said optical fiber is in the order of one-half kilometer and the reflectivity of said partial reflector is in the order of sixty-three percent.
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) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |