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1. 发明授权

US5138340A Temperature controlled light source for interlaced printer 失效
标题翻译：用于隔行打印机的温度控制光源
公开(公告)号：US5138340A
公开(公告)日：1992-08-11
申请号：US624117
申请日：1990-12-06
申请人： Robert A. Sprague , Mark S. Bernstein , Robert P. Kowalski , David L. Hecht , David L. Steinmetz , David E. Kizer , Robert L. Thornton
发明人： Robert A. Sprague , Mark S. Bernstein , Robert P. Kowalski , David L. Hecht , David L. Steinmetz , David E. Kizer , Robert L. Thornton
IPC分类号： G06K15/12
CPC分类号： G06K15/12
摘要： A technique for producing pixel patterns at different selected wavelengths. A diode laser is repeatedly pulsed and has its temperature changed from pulse to pulse, which causes the output wavelength to change. This allows pixel patterns to be interlaced by the use of dispersive elements such as prisms in the optical train. A temperature shift of about 15.degree. C. provides a wavelength shift of about 30 angstroms, which is usable. A temperature shift of 20.degree. C.-30.degree. C. or more is preferable. The temperature shifts may be accomplished by supplying specific currents below threshold and above threshold. For two-wavelength operation, the laser is driven at a first bias current below threshold for a first non-illumination interval, at a first pulse current above threshold for a first illumination interval, at a second bias current below threshold for a second non-illumination interval, and a second pulse current above threshold for a second illumination interval. The bias currents are sufficiently different so as to establish different operating temperatures for the illumination intervals. The temperature shifts may also be accomplished at least in part by use of an auxiliary heater.
摘要翻译：用于产生不同选定波长的像素图案的技术。二极管激光器被反复脉冲并且其温度从脉冲变为脉冲，这导致输出波长改变。这允许像素图案通过使用诸如光学列中的棱镜的色散元件来隔行扫描。约15℃的温度偏移提供约30埃的波长位移，这是可用的。温度变化优选为20℃-30℃以上。温度漂移可以通过提供低于阈值和高于阈值的特定电流来实现。对于双波长操作，对于第一非照明间隔，激光器以低于第一非照明间隔的第一偏置电流被驱动，在第一照明间隔的第一脉冲电流高于阈值时，在第二非 - 照明间隔和第二脉冲电流高于第二照明间隔的阈值。偏置电流充分不同，从而为照明间隔建立不同的工作温度。至少部分地通过使用辅助加热器也可以实现温度漂移。

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