XIONG Mu-di, XIAO Wen-li, XINAG Zhong-bao . Focussing-servo system of laser direct writting device[J]. Editorial Office of Optics and Precision Engineering, 2000,(1): 79-82
XIONG Mu-di, XIAO Wen-li, XINAG Zhong-bao . Focussing-servo system of laser direct writting device[J]. Editorial Office of Optics and Precision Engineering, 2000,(1): 79-82DOI:
The working principle of binary optics laser direct writting device is introduced. Method of high resolution focussing servo is discussed. The principle of two steps focussing servo system
which consists of motor and piezoelectric ceramic
is analysed. The method of two point probe focus is proposed to resolve the problem of the jog of focus
and unitization processing is used to eliminate the change of laser power. At last