US4730912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distortionless sight utilizing holographic components
Assignee: Telecommunications Radioelectriques et Telephoniques SA TRT
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Filing: 1984-11-16
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Granted: 1988-03-15
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Expires: 2004-11-16
Abstract
Abstract A sight comprises an image carrier (D) presenting an exit aperture (P3) and forming, from an observed image (I), an intermediate image (I') at the focus (F) of an ocular comprised of a spherical mirror (M) with the same optical axis (XX') as that of the image carrier (D), with a holographic beam deflection element (H) being placed at the focus (F) of the spherical mirror (M). In accordance with the invention, the intermediate image (I') is formed on the focal surface (S) of the ocular, and the holographic beam deflection element (H) is disposed on a support resting on the focal surface (S) and, in association with the spherical mirror (M), conjugates stigmatically the exit aperture (P3) of the image carrier (D) with the exit aperture (P1) of the sight.
Inventors
- 👤 Fernand Loy
- 👤 Jean-Claude Perrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:32
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0852; G02B17/0804; G02B17/0812; G02B23/00; G02B23/14; G02B5/00; G02B5/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
A sight comprising an image carrier having an exit aperture and forming, from an observed image, an intermediate image at the focus of an ocular comprised of a spherical mirror on the same optical axis as the image carrier, the focus being conjugated through said spherical mirror with at least one exit aperture of the sight located outside the optical axis common to the spherical mirror and to the image carrier; a holographic beam deflection element placed at the focus of the spherical mirror, the intermediate image being formed on the focal surface of the ocular and the holographic beam deflection element being disposed on a surface of a support, said surface being substantially geometrically identical with the focal surface, said holographic beam deflection element in association with the spherical mirror conjugating in stigmatic fashion the exit aperture of the image carrier with the exit aperture of the sight.
Claim 2
Dependent Claim
149 words
A sight comprising an image carrier having an exit aperture and forming, from an observed image, an intermediate image at the focus of an ocular comprised of a spherical mirror on the same optical axis as the image carrier, the focus being conjugated through said spherical mirror with at least one exit aperture of the sight located outside the optical axis common to the spherical mirror and to the image carrier; a holographic beam deflection element placed at the focus of the spherical mirror, the intermediate image being formed on the focal surface of the ocular and the holographic beam deflection element being disposed on a surface of a support, said surface being substantially geometrically identical with the focal surface, said holographic beam deflection element in association with the spherical mirror conjugating in stigmatic fashion the exit aperture of the image carrier with the exit aperture of the sight.
Claim 3
Dependent Claim
25 words
A sight in accordance with claim 1, further comprising an offset Schmidt plate arranged in a plane of the exit aperture of the image carrier.
Claim 4
Dependent Claim
47 words
A sight in accordance with claims 1 or 2, wherein said holographic beam deflection element furnishes two beams deflected in symmetrical directions with respect to the plane of symmetry of the sight passing through the optical axis common to the spherical mirror and to the image carrier.
Claim 5
Dependent Claim
24 words
A sight in accordance with claim 1, wherein the holographic beam deflection element furnishes multiple images from the exit aperture of the image carrier.
Claim 6
Dependent Claim
15 words
A sight in accordance with claim 1, wherein the spherical mirror is a holographic mirror.
References Cited (Backward Citations)
FR2406216A1
Cited
GB2021803A
Cited
EP0007039A1
Cited
GB2044476A
Cited
US4530564A
Cited
US4669810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |