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US3629601A
Expired / Lapsed
US
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High-resolution optical upconverter
Assignee: United States Department of the Army
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Filing: 1970-05-15
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Granted: 1971-12-21
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Expires: 1990-05-15
Abstract
Abstract An optical upconverter having a pump source, an object source, a nonlinear optical material, and a filter for passing the sum of the pump and object frequencies. A dichroic mirror or beam splitter and the pump are arranged such that the pump source appears to the entrance face of the nonlinear material to be a point source located at the object plane. The phase matching acceptance angle of the nonlinear optical material is greater than the maximum angle formed between the pump rays and the object rays for spaced points on the object.
Inventors
- 👤 Arthur H Firester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:54
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/353; G02F1/3534; G06; G06E; G06E3/00; G06E3/001
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
89 words
An image converter comprising an object source means for radiating energy at an object frequency; a pump source means for radiating energy at a pump frequency; a nonlinear mixing means for mixing radiation at said object and pump frequencies; means for directing radiation from said object and pump sources to said mixing means; and said last-mentioned means including means for focusing said radiations such that, at said mixing means, rays associated with one point at said object source means are parallel to the rays from said pump source means.
Claim 2
Dependent Claim
89 words
An image converter comprising an object source means for radiating energy at an object frequency; a pump source means for radiating energy at a pump frequency; a nonlinear mixing means for mixing radiation at said object and pump frequencies; means for directing radiation from said object and pump sources to said mixing means; and said last-mentioned means including means for focusing said radiations such that, at said mixing means, rays associated with one point at said object source means are parallel to the rays from said pump source means.
Claim 3
Dependent Claim
33 words
The device according to claim 1 and wherein said pump rays at said mixing means are spherical waves having a center of curvature located at the apparent location of said object source means.
Claim 4
Dependent Claim
15 words
The device according to claim 2 and wherein said pump source means includes a laser.
Claim 5
Dependent Claim
32 words
The device according to claim 2 and further including a filter means mounted at the output of said mixing means for passing energy at the sum of said pump and object frequencies.
Claim 6
Dependent Claim
76 words
An image converter comprising an object source means for radiating energy at an object frequency; a pump source means for radiating energy at a pump frequeNcy; means for focusing said pump energy at a point; a nonlinear mixing means for mixing radiation at said object and pump frequencies; and means for forming a virtual image of said point at said object source means and for directing said object and pump radiation at said nonlinear mixing means.
Claim 7
Dependent Claim
76 words
An image converter comprising an object source means for radiating energy at an object frequency; a pump source means for radiating energy at a pump frequeNcy; means for focusing said pump energy at a point; a nonlinear mixing means for mixing radiation at said object and pump frequencies; and means for forming a virtual image of said point at said object source means and for directing said object and pump radiation at said nonlinear mixing means.
Claim 8
Dependent Claim
15 words
The device according to claim 5 and wherein said pump source means includes a laser.
Claim 9
Dependent Claim
32 words
The device according to claim 5 and further including a filter means mounted at the output of said mixing means for passing energy at the sum of said pump and object frequencies.
Claim 10
Dependent Claim
90 words
An image converter comprising an object source means for radiating energy at an object frequency; imaging means for forming an image of said object source means at an image plane; a pump source having means for radiating energy at a pump frequency; a nonlinear mixing means mounted between said object source means and said image plane for mixing radiation at said object and pump frequencies; and means mounted between said nonlinear mixing means and said object source means for focusing said pump energy to a point at said image plane.
Claim 11
Dependent Claim
90 words
An image converter comprising an object source means for radiating energy at an object frequency; imaging means for forming an image of said object source means at an image plane; a pump source having means for radiating energy at a pump frequency; a nonlinear mixing means mounted between said object source means and said image plane for mixing radiation at said object and pump frequencies; and means mounted between said nonlinear mixing means and said object source means for focusing said pump energy to a point at said image plane.
Claim 12
Dependent Claim
15 words
The device according to claim 8 and wherein said pump source means includes a laser.
Claim 13
Dependent Claim
32 words
The device according to claim 8 and further including a filter means mounted at the output of said mixing means for passing energy at the sum of said pump and object frequencies.
References Cited (Backward Citations)
US3517983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |