US4368488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture scanning method at high speed
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1980-11-20
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Granted: 1983-01-11
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Expires: 2000-11-20
Abstract
Abstract A method for scanning an original picture at a high speed by using a white light for use in a picture reproducing machine such as a color scanner and a color facsimile, wherein a light beam generated by a light source is deflected by a light deflector and the deflected light beam is focused by a concave mirror, and wherein an original picture is scanned by a light spot obtained by focusing the light beam by the concave mirror, while the light deflector is oscillated, the original picture being arranged in a curve along which the light spot is focused, and then the light beam passing through the original picture is detected by a light detector to obtain a picture signal.
Inventors
- 👤 Takashi Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:09
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/06; H04N1/0657; G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; H04N1/024; H04N1/028
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
139 words
A method for scanning an original picture by a light beam at a high speed for use in a picture reproducing machine, comprising the steps of: (a) deflecting a light beam which is generated by a light source, by a light deflector which is pivotally oscillated, the deflected light passing by a concave mirror; (a 1) reflecting the light beam back to said concave mirror; (b) focusing the deflected light beam by a concave mirror; (c) scanning an original picture by a light spot obtained by focusing the light beam by the concave mirror, while the light deflector is oscillated, the original picture being arranged in a curved plane including a curve along which the light spot is focused; and (d) detecting the light beam passing through the original picture by a light detector to obtain a picture signal.
Claim 2
Independent Claim
139 words
A method for scanning an original picture by a light beam at a high speed for use in a picture reproducing machine, comprising the steps of: (a) deflecting a light beam which is generated by a light source, by a light deflector which is pivotally oscillated, the deflected light passing by a concave mirror; (a 1) reflecting the light beam back to said concave mirror; (b) focusing the deflected light beam by a concave mirror; (c) scanning an original picture by a light spot obtained by focusing the light beam by the concave mirror, while the light deflector is oscillated, the original picture being arranged in a curved plane including a curve along which the light spot is focused; and (d) detecting the light beam passing through the original picture by a light detector to obtain a picture signal.
Claim 3
Dependent Claim
33 words
A method as defined in claim 1, wherein said reflecting is accomplished by reflecting said light beam by a planar mirror disposed on a side of said concave mirror opposite said light source.
Claim 4
Dependent Claim
34 words
A method as defined in claim 2, wherein the diameter center of the concave mirror and the virtual image of the light deflector with respect to the planar mirror are aligned along a line.
Claim 5
Dependent Claim
16 words
A method as defined in claim 3, wherein the light detector is aligned on the line.
Claim 6
Dependent Claim
15 words
A method as defined in claim 1, wherein the concave mirror is a spherical mirror.
Claim 7
Dependent Claim
34 words
A method as defined in claim 5, wherein a lens is arranged in the path of the light beam before the light deflector so as to change the focusing distance of the light beam.
Claim 8
Independent Claim
177 words
A method for scanning an original picture by a light beam at a high speed for use in a picture reproducing machine, comprising the steps of; (a) deflecting a light beam which is generated by a light source, by a light deflector which is pivotally oscillated; (b) focusing the deflected light beam by a concave mirror; (c) scanning an original picture by a light spot obtained by focusing the light beam by the concave mirror, while the light deflector is oscillated, the original picture being arranged in a curved plane including a curve along which the light spot is focused; (d) detecting the light beam passing through the original picture by a light detector to obtain a picture signal; and wherein the light beam passing through the original picture is deflected by a pickup deflector which is pivotally oscillated in synchronization with the light deflector, wherein the light beam deflected by the pickup deflector is converged by a pickup lens, and wherein the light beam converged is detected by the light detector to obtain the picture signal.
Claim 9
Independent Claim
177 words
A method for scanning an original picture by a light beam at a high speed for use in a picture reproducing machine, comprising the steps of; (a) deflecting a light beam which is generated by a light source, by a light deflector which is pivotally oscillated; (b) focusing the deflected light beam by a concave mirror; (c) scanning an original picture by a light spot obtained by focusing the light beam by the concave mirror, while the light deflector is oscillated, the original picture being arranged in a curved plane including a curve along which the light spot is focused; (d) detecting the light beam passing through the original picture by a light detector to obtain a picture signal; and wherein the light beam passing through the original picture is deflected by a pickup deflector which is pivotally oscillated in synchronization with the light deflector, wherein the light beam deflected by the pickup deflector is converged by a pickup lens, and wherein the light beam converged is detected by the light detector to obtain the picture signal.
Claim 10
Dependent Claim
33 words
A method as defined in claim 2, wherein said reflecting is accomplished by reflecting said light beam by a planar mirror disposed on a side of said concave mirror opposite said light source.
Claim 11
Dependent Claim
34 words
A method as defined in claim 8, wherein the diameter center of the concave mirror and the virtual image of the light deflector with respect to the planar mirror are aligned along a line.
Claim 12
Dependent Claim
16 words
A method as defined in claim 9, wherein the pickup deflector is aligned on the line.
Claim 13
Independent Claim
186 words
A method for scanning an original picture by a light beam at a high speed for use in a picture reproducing machine, comprising the steps of: (a) deflecting a light beam which is generated by a light source, by a light deflector which is pivotally oscillated, the deflected light passing by a concave mirror; (a 1) reflecting the light beam back to said concave mirror; (b) focusing the deflected light beam by a concave mirror; (c) scanning an original picture by a light spot obtained by focusing the light beam by the concave mirror, while the light deflector is oscillated, the original picture being arranged in a curved plane including a curve along which the light spot is focused; and (d) detecting the light beam passing through the original picture by a light detector to obtain a picture signal; and wherein the concave mirror is a cylindrical mirror and a cylindrical lens, which focuses the light beam to the original picture in a direction perpendicular to the focusing direction of the cylindrical mirror, is arranged in the path of the light beam before the light deflector.
Claim 14
Independent Claim
186 words
A method for scanning an original picture by a light beam at a high speed for use in a picture reproducing machine, comprising the steps of: (a) deflecting a light beam which is generated by a light source, by a light deflector which is pivotally oscillated, the deflected light passing by a concave mirror; (a 1) reflecting the light beam back to said concave mirror; (b) focusing the deflected light beam by a concave mirror; (c) scanning an original picture by a light spot obtained by focusing the light beam by the concave mirror, while the light deflector is oscillated, the original picture being arranged in a curved plane including a curve along which the light spot is focused; and (d) detecting the light beam passing through the original picture by a light detector to obtain a picture signal; and wherein the concave mirror is a cylindrical mirror and a cylindrical lens, which focuses the light beam to the original picture in a direction perpendicular to the focusing direction of the cylindrical mirror, is arranged in the path of the light beam before the light deflector.
Claim 15
Dependent Claim
34 words
A method as defined in claim 11, wherein a lens is arranged in the path of the light beam before the light deflector so as to change the focusing distance of the light beam.
Claim 16
Dependent Claim
16 words
A method as defined in claim 6 or 12, wherein the lens comprises a concave lens.
Claim 17
Dependent Claim
16 words
A method as defined in claim 6 or 12, wherein the lens comprises a convex lens.
References Cited (Backward Citations)
US3520586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |