公开(公告)号：US4692877A

公开(公告)日：1987-09-08

申请号：US879247

申请日：1986-06-27

申请人： Kent A. Byerly ,  Marvin E. Feldhacker ,  Duane E. Grant

发明人： Kent A. Byerly ,  Marvin E. Feldhacker ,  Duane E. Grant

IPC分类号： H04N1/113 ,  H04N1/053 ,  H04N1/27

CPC分类号： H04N1/053 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04774

摘要： A pel timing clock compensates for the non-linear displacement profile of a resonant galvanometerscanner. A pel time counter is loaded with a count value and outputs a clock pulse after expiration of a delay serial determined by the count value. Each time the clock pulse is produced the pel time counter is reloaded. The various count values are accessed from a memory which is addressed by an address counter whose contents are also altered each time the clock pulse is produced. The memory stores a sequence of count values which, when used to load the pel time counter, produces the desired sequence of clock pulses to compensate for the non-linear displacement profile of the scanner.

摘要翻译： 像素定时时钟补偿了谐振电流计的非线性位移曲线。 像素时间计数器装载有计数值，并且在由计数值确定的延迟串行期满之后输出时钟脉冲。 每次产生时钟脉冲时，重新加载像素计时器。 各种计数值从存储器访问，该存储器由地址计数器寻址，其每当产生时钟脉冲时其内容也被改变。 存储器存储一系列计数值，当用于加载像差计时器时，产生期望的时钟脉冲序列以补偿扫描器的非线性位移分布。