US4640573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens-on-disc type optical scanning apparatus
Assignee: Koki Holdings Co Ltd
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Filing: 1983-01-25
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Granted: 1987-02-03
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Expires: 2003-01-25
Abstract
Abstract A lens-on-disc type optical scanner comprises a plurality of lenses of predetermined surface profile arranged on a disc along the circumferential direction of the disc. The disc is rotated so that a laser beam from a laser beam source passes sequentially through the lenses for optical scanning.
Inventors
- 👤 Keiji Kataoka
- 👤 Susumu Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:51
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B3/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A lens-on-disc type optical scanner comprising a first support in the form of a disc, a plurality of lenses arranged on said first disc along the circumferential direction of said disc and having a first predetermined surface profile, a second support in the form of a disc, and a plurality of lenses arranged on said second disc along the circumferential direction of said disc and having a second predetermined surface profile different from said first predetermined surface profile, said first and second discs being bonded together at their circumferential edges, wherein a scanning plane located at a predetermined position is scanned by a laser beam passing through said lenses sequentially by rotating said first and second discs.
Claim 2
Dependent Claim
117 words
A lens-on-disc type optical scanner comprising a first support in the form of a disc, a plurality of lenses arranged on said first disc along the circumferential direction of said disc and having a first predetermined surface profile, a second support in the form of a disc, and a plurality of lenses arranged on said second disc along the circumferential direction of said disc and having a second predetermined surface profile different from said first predetermined surface profile, said first and second discs being bonded together at their circumferential edges, wherein a scanning plane located at a predetermined position is scanned by a laser beam passing through said lenses sequentially by rotating said first and second discs.
Claim 3
Dependent Claim
35 words
A lens-on-disc type optical scanning apparatus according to claim 1, wherein said plurality of lenses are disposed on a circle having a center which is the same as the rotation axis of each said disc.
Claim 4
Dependent Claim
31 words
A lens-on-disc type optical scanning apparatus according to claim 1, wherein each said disc and said lenses arranged on the associated disc are made of resin and made in a body.
Claim 5
Dependent Claim
24 words
A lens-on-disc type optical scanning apparatus according to claim 1, wherein said first surface profile is convex and said second surface profile is concave.
Claim 6
Dependent Claim
31 words
A lens-on-disc type optical scanning apparatus according to claim 1, wherein said first and second discs are arranged so that said first surface profile is disposed opposite said second surface profile.
Claim 7
Dependent Claim
24 words
A lens-on-disc type optical scanning apparatus according to claim 5, wherein said first surface profile is convex and said second surface profile is concave.
Claim 8
Dependent Claim
31 words
A lens-on-disc type optical scanning apparatus accoridng to claim 5, wherein each said disc and said lenses arranged on the associated disc are made of resin and made in a body.
References Cited (Backward Citations)
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US2540953A
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US3619033A
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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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |