US3956586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of optical scanning
Assignee: Pharos AB
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Filing: 1974-10-30
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Granted: 1976-05-11
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Expires: 1994-10-30
Abstract
Abstract Several embodiments of an optical scanning system are disclosed which employ an accessible entrance pupil interposed between an image and a scanning device for isolating rays of light from the image without focusing the rays, thereby eliminating the aberrations associated with focusing. The disclosure shows the use of rotating mirrors spaced from the axis of rotation being employed for line scanning. A tilting mirror is also disclosed which converts the line scanners into complete image scanners.
Inventors
- 👤 Stig Leopold Ullstig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:12
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/108; G02B5/00; G02B5/08; G02B5/09; H; H04; H04N; H04N3/00; H04N3/02; H04N3/08; H04N3/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
An optical scanning device comprising detector means for afocal scanning of an object, said detector means including a plurality of mirrored surfaces mounted in a circular path and directed inwardly for rotation about a fixed axis for angular deflection of a substantially parallel ray path, a radiation deflecting means positioned in the parallel ray path between the mirrored surfaces and the detector means and mounted for synchronous rotation with said mirrors to direct radiation onto said detector means, said detector means having an accessible substantially fixed entrance pupil on the object side thereof.
Claim 2
Dependent Claim
93 words
An optical scanning device comprising detector means for afocal scanning of an object, said detector means including a plurality of mirrored surfaces mounted in a circular path and directed inwardly for rotation about a fixed axis for angular deflection of a substantially parallel ray path, a radiation deflecting means positioned in the parallel ray path between the mirrored surfaces and the detector means and mounted for synchronous rotation with said mirrors to direct radiation onto said detector means, said detector means having an accessible substantially fixed entrance pupil on the object side thereof.
Claim 3
Dependent Claim
17 words
The optical scanning device of claim 1, wherein said mirrors on said circular path are roof-edge prisms.
Claim 4
Dependent Claim
22 words
The optical scanning device of claim 1, wherein said mirrors on said circular path are two reflecting surfaces perpendicular to each other.
Claim 5
Dependent Claim
71 words
The optical scanning device of claim 1, wherein said radiation deflecting means is a polygonal cylinder prism with mutually parallel reflecting surfaces, the angular velocity of said radiation defelction means following the following equation: f.sub.s /f.sub.p = n.sub.s /n.sub.p ; where f s is the angular velocity of the mirrored surfaces and n s is the number of mirrored surfaces and n p is the number of surfaces of the prism.
Claim 6
Dependent Claim
18 words
The optical scanning device of claim 1, wherein said rotating radiation deflection means is a rotating refractive prism.
Claim 7
Dependent Claim
18 words
The optical scanning device according to claim 1, wherein an optical means is positioned in said entrance pupil.
Claim 8
Dependent Claim
19 words
The optical scanning device of claim 5, wherein said radiation reflecting mirrors on said optical path are roof-edge prisms.
Claim 9
Dependent Claim
19 words
The optical scanning device according to claim 6, wherein said optical means in the entrance pupil is an objective.
Claim 10
Dependent Claim
19 words
The optical scanning device of claim 6, wherein said optical means in the entrance pupil is a tilting mirror.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |