发明名称 |
Laser beam recording apparatus |
摘要 |
A laser beam recording apparatus is provided with a semiconductor laser for producing a laser beam, and a beam scanning system for scanning the laser beam on a photosensitive material. A laser operation control circuit produces a light emission level instructing signal corresponding to an image signal and controls a drive current for the semiconductor laser over a natural light emission region and a laser oscillation region on the basis of the light emission level instructing signal, thereby to modulate the intensity of the laser beam. A device superimposes a radio-frequency current upon the drive current for the semiconductor laser only in a region in which the drive current exceeds a predetermined value.
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申请公布号 |
US5283793(A) |
申请公布日期 |
1994.02.01 |
申请号 |
US19920987814 |
申请日期 |
1992.12.09 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
SHOJI, TAKASHI |
分类号 |
B41J2/44;G03G15/04;G06K15/12;H01S5/062;H01S5/068;H04N1/23;H04N1/40;(IPC1-7):H01S3/10 |
主分类号 |
B41J2/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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