US4869582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical scanning apparatus for presenting the dislocation of a stationary mirror
Assignee: Ricoh Co Ltd
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Filing: 1987-12-11
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Granted: 1989-09-26
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Expires: 2007-12-11
Abstract
Abstract An optical apparatus in which optical devices are abutted against reference planes for positioning secured in the housing case of an optical system, and the housing cover is put on said housing case. On the inside surface of the housing cover a rib is provided to restrict the movement of the optical devices with the cover securely put on the housing case.
Inventors
- 👤 Tomohiro Nakajima
- 👤 Takeshi Komurasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:08
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/18; H; H04; H04N; H04N1/00; H04N1/04; H04N1/113; H04N1/1135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
An optical scanning apparatus comprising, in combination, an optical system including at least one mirror; a housing case in which said optical system, including said at least one mirror, is disposed; at least one reference plane secured in the housing case, said at least one mirror being abutted against said at least one reference plane for positioning; means for exerting a pressing force on said at least one mirror in a given direction to press said at least one mirror against said at least one reference plane; a housing cover, disposed on said housing case, for preventing unnecessary light from entering and for preventing contamination of the optical system from dust, said cover having an inside surface; and a rib or ribs disposed on said inside surface of said housing cover to restrict movement of said at least one mirror along a direction different from said given direction of said force.
Claim 2
Dependent Claim
151 words
An optical scanning apparatus comprising, in combination, an optical system including at least one mirror; a housing case in which said optical system, including said at least one mirror, is disposed; at least one reference plane secured in the housing case, said at least one mirror being abutted against said at least one reference plane for positioning; means for exerting a pressing force on said at least one mirror in a given direction to press said at least one mirror against said at least one reference plane; a housing cover, disposed on said housing case, for preventing unnecessary light from entering and for preventing contamination of the optical system from dust, said cover having an inside surface; and a rib or ribs disposed on said inside surface of said housing cover to restrict movement of said at least one mirror along a direction different from said given direction of said force.
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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) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |