US4962983A
Expired / Lapsed
US
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Laser optical apparatus
Assignee: Canon Inc
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Filing: 1988-12-20
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Granted: 1990-10-16
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Expires: 2008-12-20
Abstract
Abstract A laser optical apparatus includes a laser source for emitting first and second laser beams, a first lens for passage of the first laser beam, a second lens for passage of the second laser beam, the first lens is on the second lens.
Inventors
- 👤 Yoshiaki Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:07
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B3/00; G02B3/0006; G02B3/0037; G02B3/005
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
64 words
A laser optical apparatus, comprising: means for emitting first and second laser beans; a first lens for passage of the first laser beam; a second lens for passage of the second laser beam, said second lens including top and bottom surfaces; and means for positioning the bottom surface of the second lens; wherein the top surface of said second lens positions said first lens.
Claim 2
Dependent Claim
64 words
A laser optical apparatus, comprising: means for emitting first and second laser beans; a first lens for passage of the first laser beam; a second lens for passage of the second laser beam, said second lens including top and bottom surfaces; and means for positioning the bottom surface of the second lens; wherein the top surface of said second lens positions said first lens.
Claim 3
Dependent Claim
40 words
An apparatus according to claim 1, further comprising deflecting means for scanningly deflecting the laser beams, wherein said first and second lenses are effective to image the laser beams deflected by said deflecting means on a surface to be scanned.
Claim 4
Dependent Claim
17 words
An apparatus according to claim 2, wherein said first and second lenses are generally flat in shape.
Claim 5
Dependent Claim
36 words
An apparatus according to claim 1, wherein said first and second lenses are cylindrical lenses having respective powers on a plane perpendicular to a surface of said first lens on which said second lens is disposed.
Claim 6
Dependent Claim
27 words
An apparatus according to claim 1, wherein a top surface of said second lens and a bottom surface of said first lens are bonded and fixed together.
Claim 7
Dependent Claim
40 words
An apparatus according to claim 1, further comprising deflecting means for scanningly deflecting the laser beams, wherein said laser optical apparatus is used in a laser beam printer having a movable photosensitive member which is scanned with the laser beams.
Claim 8
Dependent Claim
22 words
An apparatus according to claim 1, further comprising a deflecting mirror for scanningly deflecting both of the first and second laser beams.
Claim 9
Dependent Claim
15 words
An apparatus according to claim 7, wherein said deflecting mirror is a rotational polygonal mirror.
Claim 10
Dependent Claim
57 words
A laser optical system, comprising: laser emitting means for emitting first and second laser beams; a first lens for passage of the first laser beam; a second lens for passage of the second laser beam, wherein said first lens is disposed on said second lens; and positioning means for positioning a bottom surface of said second lens.
Claim 11
Dependent Claim
57 words
A laser optical system, comprising: laser emitting means for emitting first and second laser beams; a first lens for passage of the first laser beam; a second lens for passage of the second laser beam, wherein said first lens is disposed on said second lens; and positioning means for positioning a bottom surface of said second lens.
Claim 12
Dependent Claim
22 words
An apparatus according to claim 9, wherein a top surface of said second lens functions as a reference for said first lens.
Claim 13
Dependent Claim
27 words
An apparatus according to claim 10, wherein a top surface of said second lens and a bottom surface of said first lens are bonded and fixed together.
Claim 14
Dependent Claim
35 words
An apparatus according to claim 9, wherein a width of said first lens measured in a direction perpendicular to optical axes of said first and second lenses is larger than that of said second lens.
Claim 15
Dependent Claim
27 words
An apparatus according to claim 9 or 12, further comprising a second positioning portion for positioning a vertical wall of each of said first and second lenses.
Claim 16
Dependent Claim
21 words
An apparatus according to claim 12, further comprising a third positioning portion for positioning a bottom surface of said first lens.
Claim 17
Dependent Claim
40 words
An apparatus according to claim 9, further comprising deflecting means for scanningly deflecting the laser beams, wherein said first and second lenses are effective to image the laser beams deflected by said deflecting means on a surface to be scanned.
Claim 18
Dependent Claim
17 words
An apparatus according to claim 15, wherein said first and second lenses are generally flat in shape.
Claim 19
Dependent Claim
36 words
An apparatus according to claim 9, wherein said first and second lenses are cylindrical lenses having respective powers on a plane perpendicular to a surface of said first lens on which said second lens is disposed.
Claim 20
Dependent Claim
40 words
An apparatus according to claim 9, further comprising deflecting means for scanningly deflecting the laser beams, wherein said laser optical apparatus is used in a laser beam printer having a movable photosensitive member which is scannec with the laser beams.
Claim 21
Dependent Claim
22 words
An apparatus according to claim 9, further comprising a deflecting mirror for scanningly deflecting both of the first and second laser beams.
Claim 22
Dependent Claim
15 words
An apparatus according to claim 19, wherein said deflecting mirror is a rotational polygonal mirror.
Claim 23
Dependent Claim
20 words
An apparatus according to claim 1 or claim 9, wherein said first lens is directly contacted on said second lens.
References Cited (Backward Citations)
US4212530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |