Patent US4790639A successfully refreshed from Google Patents.
US4790639A
Expired / Lapsed
US
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Rotary mirror for optical systems
Assignee: Airbus Defence and Space GmbH
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Filing: 1987-07-16
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Granted: 1988-12-13
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Expires: 2007-07-16
Abstract
Abstract A rotary mirror for an optical system has a mirror section with first and cond edges and a bearing connecting to each edge. A reinforcing rib and a slot extend alongside at least the first and second edges, and preferably at a right angle to a rotational axis of the two bearings. Each rib may extend on one or the other side of the respective slot or the slot may extend within the respective reinforcing rib. In all embodiments the slot rib combination decouples the mirror section from any misalignment of the bearings to prevent introducing distortions into the mirror section.
Inventors
- 👤 Klaus Baumgarten
- 👤 Kurt Hummel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:09
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B26/00; G02B26/08; G02B26/10; G02B7/00; G02B7/18; G02B7/182; G02B7/1821
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
A rotary mirror device for an optical system, comprising mirror means for reflecting radiation, said mirror means including a thin mirror section having a given small thickness and ribs forming a shape retaining stiff box frame around said mirror section, said ribs having, perpendicularly to said mirror section, a height corresponding to several times said given thickness to form box frame sides, first rotation bearing means connected to said stiff box frame at one side of said stiff box frame, second rotation bearing means connected to an opposite side of said stiff box frame, said first and second rotation bearing means defining a common rotational axis, first and second slots in said mirror section, said slots extending alongside a first pair of opposite stiff box frame sides and symmetrically relative to said common rotational axis, said slots having a length corresponding substantially to a distance between two further box frame sides forming a second pair of box frame sides.
Claim 2
Dependent Claim
159 words
A rotary mirror device for an optical system, comprising mirror means for reflecting radiation, said mirror means including a thin mirror section having a given small thickness and ribs forming a shape retaining stiff box frame around said mirror section, said ribs having, perpendicularly to said mirror section, a height corresponding to several times said given thickness to form box frame sides, first rotation bearing means connected to said stiff box frame at one side of said stiff box frame, second rotation bearing means connected to an opposite side of said stiff box frame, said first and second rotation bearing means defining a common rotational axis, first and second slots in said mirror section, said slots extending alongside a first pair of opposite stiff box frame sides and symmetrically relative to said common rotational axis, said slots having a length corresponding substantially to a distance between two further box frame sides forming a second pair of box frame sides.
Claim 3
Dependent Claim
42 words
The rotary mirror device of claim 1, wherein each of said first and second rotation bearing means further comprises a bearing shaft, at least one of said bearing shafts being connected to a further device which itself has at least two bearings.
Claim 4
Dependent Claim
19 words
The rotary mirror device of claim 1, wherein said first and second slots are machined into said mirror section.
Claim 5
Dependent Claim
58 words
The rotary mirror device of claim 1, wherein said ribs comprise a first double rib extending along said one side of said stiff box frame and a second double rib extending along said opposite side of said stiff box frame, said first slot extending through said first double rib, said second slot extending through said second double rib.
Claim 6
Dependent Claim
16 words
The rotary mirror device of claim 1, further comprising at least one central reinforcing rib (22).
Claim 7
Dependent Claim
15 words
The rotary mirror device of claim 1, wherein said mirror section has a rectangular configuration.
Claim 8
Dependent Claim
17 words
The rotary mirror device of claim 1, wherein said common rotational axis extends in said mirror section.
Claim 9
Dependent Claim
23 words
The rotary mirror device of claim 1, wherein said first and second slots extend at a right angle relative to said rotational axis.
Claim 10
Dependent Claim
21 words
The rotary device of claim 1, wherein said first and second slots extend in parallel to the neighboring box frame sides.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-13 | 1992-06-13 | 1992-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-13 | 1996-06-13 | 1996-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-13 | 2000-06-13 | 2000-12-13 | $7700.00 | Window Closed / Lapsed |