Patent US3883688A successfully refreshed from Google Patents.
US3883688A
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Method and arrangement for recording by a writing beam
Assignee: Agfa Gevaert AG
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Filing: 1974-02-26
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Granted: 1975-05-13
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Expires: 1994-02-26
Abstract
Abstract A method and an arrangement for line-by-line recording of information by a controlled writing beam in which random statistical fluctuations are superimposed on the repeating vertical error deflections of the beam.
Inventors
- 👤 Ulrich Greis
- 👤 Josef Helmberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:40
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
101 words
A method of line-by-line recording of information by a controlled writing beam, comprising directing a writing beam with a predetermined picture frequency and having a transverse movement due to a periodically repeating error, and a longitudinal movement, at a recording medium to record a plurality of recording lines spaced a predetermined distance from each other; controlling the longitudinal movement of said writing beam; and controlling the transverse movement of said writing beam by means of statistical fluctuations, said fluctuations having a maximum amplitude equal to half said predetermined distance between said recording lines so as to suppress said periodically repeating error.
Claim 2
Independent Claim
101 words
A method of line-by-line recording of information by a controlled writing beam, comprising directing a writing beam with a predetermined picture frequency and having a transverse movement due to a periodically repeating error, and a longitudinal movement, at a recording medium to record a plurality of recording lines spaced a predetermined distance from each other; controlling the longitudinal movement of said writing beam; and controlling the transverse movement of said writing beam by means of statistical fluctuations, said fluctuations having a maximum amplitude equal to half said predetermined distance between said recording lines so as to suppress said periodically repeating error.
Claim 3
Dependent Claim
38 words
A method as defined in claim 1, wherein said transverse movement controlling step further comprises limiting the transverse deviation frequency of said statistical fluctuations to lie between one-third and one times the picture frequency of said writing beam.
Claim 4
Dependent Claim
23 words
A method as defined in claim 1, wherein said controlling steps further comprise modulation of said writing beam by an electro-optical refracting device.
Claim 5
Dependent Claim
32 words
A method as defined in claim 1, wherein said transverse movement controlling step further comprises utilizing a signal generator to produce said statistical fluctuations resulting in vertical deflections of the writing beam.
Claim 6
Dependent Claim
15 words
A method as defined in claim 1, wherein said writing beam is a laser beam.
Claim 7
Dependent Claim
15 words
A method as defined in claim 1, wherein said writing beam is an electron beam.
Claim 8
Dependent Claim
88 words
An arrangement for line-by-line recording of information by a controlled writing beam comprising means for generating a writing beam; a recording medium spaced from said generating means; means for controlling movement of said writing beam to produce on said recording medium a plurality of substantially parallel recording lines spaced in transverse direction from each other, said controlling means producing in said recording lines transverse deflections forming a repeating error pattern; and means for superimposing deflections to said beam in accordance with statistical fluctuations to suppress said error pattern.
Claim 9
Dependent Claim
88 words
An arrangement for line-by-line recording of information by a controlled writing beam comprising means for generating a writing beam; a recording medium spaced from said generating means; means for controlling movement of said writing beam to produce on said recording medium a plurality of substantially parallel recording lines spaced in transverse direction from each other, said controlling means producing in said recording lines transverse deflections forming a repeating error pattern; and means for superimposing deflections to said beam in accordance with statistical fluctuations to suppress said error pattern.
Claim 10
Dependent Claim
16 words
An arrangement as defined in claim 7, wherein said control means comprise an electromechanical deflection device.
Claim 11
Dependent Claim
19 words
An arrangement as defined in claim 7, wherein said superimposing means for said statistical fluctuations is a signal generator.
Claim 12
Dependent Claim
16 words
An arrangement as defined in claim 7, wherein said control means comprise an electro-optical deflection device.
Claim 13
Dependent Claim
16 words
An arrangement as defined in claim 7, wherein the control means comprise a piezoelectric deflection device.
Claim 14
Dependent Claim
15 words
An arrangement as defined in claim 7, wherein said writing beam is a laser beam.
Claim 15
Dependent Claim
15 words
An arrangement as defined in claim 7, wherein said writing beam is an electron beam.
Claim 16
Dependent Claim
15 words
An arrangement as defined in claim 13, wherein said control means comprise deflection electrode plates.
Claim 17
Dependent Claim
28 words
An arrangement as defined in claim 7, wherein said superimposing means produce deflections having a frequency greater and an amplitude smaller than the deflections of said error pattern.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |