EP0014548A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Flying spot scanning apparatus
Assignee: Xerox Corp
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Filing: 1980-01-24
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Granted: —
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Expires: 2000-01-24
Abstract
Abstract A flying spot scanning apparatus including a laser (20) and a multifaceted rotating polygon or pyramid (44) as the scanner. In particular, a beam of light (34) such as that generated by a laser beam, is directed onto a first facet (42) of the scanner. This beam is expanded and reflected back to the same facet (42) or any other facet (46) on the scanner by optical means (50) positioned adjacent the scanner so that the beam is caused to follow the facet of the scanner upon which the beam is reflected during a complete scan and to shift to the next facet for the following scan.
Inventors
- 👤 Leonard C. Debenedictis
- 👤 Gary K. Starkweather
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:25
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/113; H04N1/1135; G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/12; G02B26/129; G02B27/00; G02B27/0025; G02B27/0031
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
1 . A flying spot scanning apparatus including means (20) for producing a beam (34) of radiant energy, a rotatable scanner (44) having a plurality of reflective surfaces (42, 46) each of which is arranged to reflect the beam and to cause scanning motion of the beam on rotation of the scanner (44) and means (36, 58, 60) to focus the scanning beam at a scan line (10) on an image surface (14), characterised in that an optical element (50) is positioned in the path of the beam (52) reflected from one of said reflective surfaces (42) so as to return the beam for a second reflection from said one reflective surface (42) or from another one of said reflective surfaces (46) whereby the beam is caused to track the reflective surface at which the second reflection occurs during a complete scan, and to shift to the next reflective surface for the following scan.
Claim 2
Dependent Claim
154 words
1 . A flying spot scanning apparatus including means (20) for producing a beam (34) of radiant energy, a rotatable scanner (44) having a plurality of reflective surfaces (42, 46) each of which is arranged to reflect the beam and to cause scanning motion of the beam on rotation of the scanner (44) and means (36, 58, 60) to focus the scanning beam at a scan line (10) on an image surface (14), characterised in that an optical element (50) is positioned in the path of the beam (52) reflected from one of said reflective surfaces (42) so as to return the beam for a second reflection from said one reflective surface (42) or from another one of said reflective surfaces (46) whereby the beam is caused to track the reflective surface at which the second reflection occurs during a complete scan, and to shift to the next reflective surface for the following scan.
Claim 3
Dependent Claim
13 words
The apparatus of Claim 1 wherein the optical element (50) includes a reflector.
Claim 4
Dependent Claim
16 words
The apparatus of Claim 2 wherein the optical element (50) includes a curved reflective surface (51).
Claim 5
Independent Claim
27 words
The apparatus of any one of Claims 1 to 3 wherein the scanner (44) comprises a single multifaceted polygon having reflective facets which constitute said reflective surfaces.
Claim 6
Dependent Claim
20 words
The apparatus of Claim 4 wherein said second reflection is from a second facet (46) adjacent the first facet (42).
Claim 7
Independent Claim
27 words
The apparatus of any one of Claims 1 to 3 wherein said scanner (44) comprises a single multifaceted pyramid having reflective facets which constitute said reflective surfaces.
Claim 8
Independent Claim
27 words
The apparatus of any one of Claims 1 to 6 wherein said radiant energy means is a laser (20) which emits a beam (34) of' collimated light.
Claim 9
Independent Claim
27 words
The apparatus of any one of Claims 1 to 7 including means (30) for modulating said beam in accordance with the information content of an electrical signal.
References Cited (Backward Citations)
No citation records indexed.
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