US3600581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ir-optical image reproducing system and method
Assignee: Eltro GmbH and Co
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Filing: 1969-08-18
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Granted: 1971-08-17
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Expires: 1989-08-18
Abstract
Abstract An IR-optical image reproduction system which comprises an objective, a field lens and collimator arranged in optical series. The objective focuses the incoming image at an image plane and the field lens is positioned at this plane. The collimator forms a parallel beam path of smaller diameter than that of the image entering the objective. A stop is positioned in the path and is provided with an aperture which permits the passage of the parallel beam while blocking heat rays which might be generated upstream of the stop. A second objective receives the parallel beam and focuses an image at a receiver all which responds to the IR content thereof. This cell has a determinable operating temperature and a cooling apparatus is provided which cools the system between the collimator and the cell to a temperature which is close to that of the cell. A beam splitter can be provided which operates on the parallel beam and with this beam splitter is associated another objective and receiver cell. A cooling apparatus is also provided to operate with this additional structure.
Inventors
- 👤 Josef-Ferdinand Menke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:51
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/02; G01J5/06; G01J5/061; G01J5/08; G01J5/0806; G01J5/0856; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A method comprising optically receiving an image with a first diameter, focusing the image and collimating the same into a bundle of parallel rays of smaller diameter than said first diameter, transducing the IR content of said bundle into energy of a different form, and arranging a constricted passage for said bundle to prevent the passage therewith of ambient thermal energy otherwise capable of passing along with said bundle, and effecting a temperature reduction along said bundle prior to the transducing to avoid the introduction of ambient heat.
Claim 2
Independent Claim
88 words
A method comprising optically receiving an image with a first diameter, focusing the image and collimating the same into a bundle of parallel rays of smaller diameter than said first diameter, transducing the IR content of said bundle into energy of a different form, and arranging a constricted passage for said bundle to prevent the passage therewith of ambient thermal energy otherwise capable of passing along with said bundle, and effecting a temperature reduction along said bundle prior to the transducing to avoid the introduction of ambient heat.
Claim 3
Dependent Claim
142 words
An IR-optical image reproduction system comprising an objective, a field lens and a collimator arranged in optical series, the objective focusing an incoming Image at an image plane and the field lens being positioned at said plane, said collimator forming a parallel beam path of smaller diameter than that of the image entering said objective, a cooled stop positioned in said path and provided with an aperture to permit the passage of the parallel beam while blocking heat rays generated upstream of the stop, optical means including a second objective and a receiver cell downstream of said collimator, said second objective focusing an image at said receiver cell, said cell having a determinable operating temperature, and cooling means positioned in front of said receiver for cooling said optical means downstream of said collimator to a temperature close to that of said cell.
Claim 4
Dependent Claim
142 words
An IR-optical image reproduction system comprising an objective, a field lens and a collimator arranged in optical series, the objective focusing an incoming Image at an image plane and the field lens being positioned at said plane, said collimator forming a parallel beam path of smaller diameter than that of the image entering said objective, a cooled stop positioned in said path and provided with an aperture to permit the passage of the parallel beam while blocking heat rays generated upstream of the stop, optical means including a second objective and a receiver cell downstream of said collimator, said second objective focusing an image at said receiver cell, said cell having a determinable operating temperature, and cooling means positioned in front of said receiver for cooling said optical means downstream of said collimator to a temperature close to that of said cell.
Claim 5
Dependent Claim
19 words
A system as claimed in claim 2 comprising cooled stop means between said second objective and said receiver cell.
Claim 6
Dependent Claim
57 words
A system as claimed in claim 2 comprising beam splitting means disposed in the parallel beam path of the collimator, a further objective and a second receiver cell disposed to receive the radiation reflected from the beam splitting means, a further stop means between said further objective and cell, and cooling means to cool the stop means.
Claim 7
Dependent Claim
20 words
A system as claimed in claim 4 wherein all components downstream of the collimator are mounted in a cooled housing.
Claim 8
Dependent Claim
24 words
A system as claimed in claim 4 comprising a reflective mirror operatively associated with said beam splitting means and with said cooled stop means.
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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |