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US4681394A
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Light beam scanning system
Assignee: Fujifilm Holdings Corp
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Filing: 1986-02-27
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Granted: 1987-07-21
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Expires: 2006-02-27
Abstract
Abstract In a light beam scanning system, a plurality of laser beams emitted by a plurality of semiconductors are combined into a single laser beam, and the single laser beam is deflected to sweep a surface-to-be-scanned. The oscillation wavelengths of the semiconductor lasers are selected so that the oscillation wavelengths λi and λj of any two of the semiconductor lasers satisfy the formula |λi-λj|≧λiλjM/c wherein M and c respectively represent the picture element frequency and the velocity of light.
Inventors
- 👤 Masaru Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:04
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/0604; B23K26/0613; B23K26/064; B23K26/0643; B23K26/0648; B23K26/0665; B23K26/08; B23K26/082; B23K26/0821; B41; B41B; B41B21/00; B41B21/08; B41B21/14; B41J; B41J2/00; B41J2/435; B41J2/47; B41J2/471; B41J2/473; G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/02815; H04N1/0282; H04N1/0283; H01; H01S; H01S5/00; H01S5/40; H01S5/4025
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
A light beam scanning system in which laser beams emitted by a plurality of semiconductor lasers are combined into a single laser beam and the single laser beam is caused to sweep a surface-to-be-scanned, characterized in that the oscillation wavelengths of the semiconductor lasers are selected so that the oscillation wavelengths λi and λj of any two of the semiconductor lasers satisfy the formula |λi-λj|≧λiλjM/c wherein M and c respectively represent the picture element frequency and the velocity of light.
Claim 2
Dependent Claim
80 words
A light beam scanning system in which laser beams emitted by a plurality of semiconductor lasers are combined into a single laser beam and the single laser beam is caused to sweep a surface-to-be-scanned, characterized in that the oscillation wavelengths of the semiconductor lasers are selected so that the oscillation wavelengths λi and λj of any two of the semiconductor lasers satisfy the formula |λi-λj|≧λiλjM/c wherein M and c respectively represent the picture element frequency and the velocity of light.
Claim 3
Dependent Claim
55 words
A light beam scanning system as defined in claim 1 in which the oscillation wavelengths of the semiconductor lasers are selected so that the oscillation wavelengths λi and λj of any two of the semiconductor lasers satisfy the formula |λi-λj|≧5(λiλjM/c) wherein M and c respectively represent the picture element frequency and the velocity of light.
References Cited (Backward Citations)
US4509819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |