Patent US4641931A successfully refreshed from Google Patents.
US4641931A
Expired / Lapsed
US
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Dual magnification telescope
Assignee: Thomson TRT Defense
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Filing: 1986-06-16
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Granted: 1987-02-10
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Expires: 2006-06-16
Abstract
Abstract The invention relates to a dual magnification telescope such as, for example, an intensifier telescope. Telescope compriser an objective, an intensifier tube with an optical fiber input, and an eyepiece. According to the invention, the dual magnification is obtained by an optical fiber array comprising straight fiber having unity magnification and tapered fibers having a magnification G<1.
Inventors
- 👤 Fernand R. Loy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:22
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A dual magnification telescope comprising: an objective for forming an image of a field of view; and an eyepiece for receiving the image of the field of view; characterized in that the telescope further comprises an optical fiber array arranged between the objective and the eyepiece for passing the image of the field of view through the fiber array to the eyepiece, said fiber array comprising a first bundle of optical fibers having a first magnification and a second bundle of optical fibers having a second magnification different from the first magnification, said first bundle passing a first portion of the image to the eyepiece, said second bundle passing a second portion of the image, different from the first portion of the image, to the eyepiece.
Claim 2
Dependent Claim
126 words
A dual magnification telescope comprising: an objective for forming an image of a field of view; and an eyepiece for receiving the image of the field of view; characterized in that the telescope further comprises an optical fiber array arranged between the objective and the eyepiece for passing the image of the field of view through the fiber array to the eyepiece, said fiber array comprising a first bundle of optical fibers having a first magnification and a second bundle of optical fibers having a second magnification different from the first magnification, said first bundle passing a first portion of the image to the eyepiece, said second bundle passing a second portion of the image, different from the first portion of the image, to the eyepiece.
Claim 3
Dependent Claim
25 words
A dual magnification telescope as claimed in claim 1, characterized in that the first bundle of optical fibers is tapered and has a nonunity magnification.
Claim 4
Dependent Claim
24 words
A dual magnification telescope as claimed in claim 1, characterized in that the second bundle of optical fibers is straight and has unity magnification.
Claim 5
Dependent Claim
30 words
A dual magnification telescope as claimed in claim 1, characterized in that: the telescope has an optical axis; and the optical fiber bundles are arranged concentrically around the optical axis.
Claim 6
Dependent Claim
35 words
A dual magnification telescope as claimed in claim 1, characterized in that: the telescope has an optical axis; and the optical fiber bundles are arranged on opposite sides of a plane containing the optical axis.
Claim 7
Dependent Claim
49 words
A dual magnification telescope as claimed in claim 1, characterized in that the telescope further comprises an image intensifier arranged between the optical fiber array and the eyepiece for intensifying the image of the field of view from the fiber array and passing the intensified image to the eyepiece.
Claim 8
Dependent Claim
115 words
A dual magnification telescope comprising: an objective for forming an image of a field of view; and an eyepiece for receiving the image of the field of view; characterized in that: the telescope further comprises an optical fiber array arranged between the objective and the eyepiece for passing the image of the field of view through the fiber array to the eyepiece, said fiber array comprising a first bundle of optical fibers having a first magnification and a second bundle of optical fibers having a second magnification different from the first magnification; the telescope has an optical axis; and the optical fiber bundles are arranged on opposite sides of a plane containing the optical axis.
Claim 9
Dependent Claim
115 words
A dual magnification telescope comprising: an objective for forming an image of a field of view; and an eyepiece for receiving the image of the field of view; characterized in that: the telescope further comprises an optical fiber array arranged between the objective and the eyepiece for passing the image of the field of view through the fiber array to the eyepiece, said fiber array comprising a first bundle of optical fibers having a first magnification and a second bundle of optical fibers having a second magnification different from the first magnification; the telescope has an optical axis; and the optical fiber bundles are arranged on opposite sides of a plane containing the optical axis.
Claim 10
Dependent Claim
126 words
A dual magnification telescope comprising: an objective for forming an image of a field of view; and an eyepiece for receiving the image of the field of view; characterized in that the telescope further comprises: an optical fiber array arranged between the objective and the eyepiece for passing the image of the field of view through the fiber array to the eyepiece, said fiber array comprising a first bundle of optical fibers having a first magnification and a second bundle of optical fibers having a second magnification different from the first magnification; and an image intensifier arranged between the optical fiber array and the eyepiece for intensifying the image of the field of view from the fiber array and passing the intensified image to the eyepiece.
Claim 11
Dependent Claim
126 words
A dual magnification telescope comprising: an objective for forming an image of a field of view; and an eyepiece for receiving the image of the field of view; characterized in that the telescope further comprises: an optical fiber array arranged between the objective and the eyepiece for passing the image of the field of view through the fiber array to the eyepiece, said fiber array comprising a first bundle of optical fibers having a first magnification and a second bundle of optical fibers having a second magnification different from the first magnification; and an image intensifier arranged between the optical fiber array and the eyepiece for intensifying the image of the field of view from the fiber array and passing the intensified image to the eyepiece.
References Cited (Backward Citations)
US2992587A
Cited
US3058021A
Cited
US3187627A
Cited
US3142235A
Cited
US3128167A
Cited
US3173012A
Cited
US3737667A
Cited
US4099833A
Cited
US4152724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |