In the design , gear and spline were adopted , so symmetrical movement of ( collimator ’ s ) lead gates can be achieved easily , mechanical structure became more compact . worm was adopted to adjust mirrors accurately , and deflection of mirrors can be prevented in case of the external impacts or vibrations 采用齒輪齒條結(jié)構(gòu),實(shí)現(xiàn)鉛門的對(duì)稱開合運(yùn)動(dòng),使子系統(tǒng)的機(jī)械結(jié)構(gòu)更為緊湊,同時(shí)提高了定位精度;采用蝸輪蝸桿調(diào)解反光鏡的角度,可以使反光鏡的調(diào)節(jié)更精確,同時(shí)可以防止在外界振動(dòng)或撞擊下反光鏡發(fā)生偏轉(zhuǎn)。