做照明聚光設(shè)計(jì),為LED做condenser,想了解condenser的直徑范圍,應(yīng)該是可以通過(guò)光展量來(lái)計(jì)算,但對(duì)于光展量這個(gè)詞一直沒(méi)有搜到解釋?zhuān)恢?span onclick="sendmsg('pw_ajax.php','action=relatetag&tagname=論壇',this.id)" style="cursor:pointer;border-bottom: 1px solid #FA891B;" id="rlt_3">論壇中有沒(méi)有人能指點(diǎn)一二,感謝!!