US4074930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial optical system
Assignee: United States Department of the Air Force
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Filing: 1976-01-28
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Granted: 1978-02-21
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Expires: 1996-01-28
Abstract
Abstract A system for allowing transmitter and receiver optical systems to utilize a common aperture and common optical elements simultaneously by introducing the transmitted beam into a small coaxial blind zone generated by an obscuration.
Inventors
- 👤 Gary J. Folsom
- 👤 Francis J. Kaisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:33
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/14; G02B23/00; G02B23/12; G02B27/1006; G02B27/141; G02B27/144
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
168 words
A coaxial optical system for transmitter and receiver optical systems utilizing a common aperture and optical elements comprising: an enclosure; a first image receiving means for receiving radiation of designated wavelengths located along an axis within the enclosure; a second image receiving means for receiving radiation of designated wavelengths different from said first image receiving means located along an axis at an angle thereto, within the enclosure; means for generating radiation compatable with said second image receiving means located along an axis transverse to the axis thereof, within said enclosure; a first lens system including an aperture for collecting radiation and focusing an image at said first image receiving means; means located in said lens system for obscuring an area along the axis thereof; a second lens system including a beam splitting means located along the axis of the second image receiving means and adapted to cooperate with said first lens system whereby radiation transmitted and received utilizes the area of obscuration in the said first lens system.
Claim 2
Dependent Claim
168 words
A coaxial optical system for transmitter and receiver optical systems utilizing a common aperture and optical elements comprising: an enclosure; a first image receiving means for receiving radiation of designated wavelengths located along an axis within the enclosure; a second image receiving means for receiving radiation of designated wavelengths different from said first image receiving means located along an axis at an angle thereto, within the enclosure; means for generating radiation compatable with said second image receiving means located along an axis transverse to the axis thereof, within said enclosure; a first lens system including an aperture for collecting radiation and focusing an image at said first image receiving means; means located in said lens system for obscuring an area along the axis thereof; a second lens system including a beam splitting means located along the axis of the second image receiving means and adapted to cooperate with said first lens system whereby radiation transmitted and received utilizes the area of obscuration in the said first lens system.
Claim 3
Dependent Claim
28 words
A coaxial optical system for transmitter and receiver optical systems according to claim 1 wherein: said first image receiver means receives radiation having a wavelength of 0.85 microns.
Claim 4
Dependent Claim
28 words
A coaxial optical system for transmitter and receiver optical systems according to claim 2 wherein said second image receiver means receiving radiation having a wavelength of 1.06 microns.
Claim 5
Dependent Claim
34 words
A coaxial optical system for transmitter and receiver optical systems according to claim 1 wherein: said second image receiving means is located on an axis transverse to the axis of the first lens system.
Claim 6
Dependent Claim
34 words
A coaxial optical system for transmitter and receiver optical systems according to claim 1 wherein said second image receiving means is located on an axis parallel to the axis of the first lens system.
References Cited (Backward Citations)
US2718816A
Cited
US3096767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |