It has been found that before thermal equilibrium to become established in the element, its thermal lensing effect presents a kind of behavior of fluctuation. 實(shí)驗發(fā)現，光學(xué)元件在達到熱平衡狀態(tài)之前，其熱透鏡效應呈現某種波動(dòng)起伏的特征。
We analyze the positive and negative lens effect caused by the hole theoretically and give the expression of normalized transmittance in this condition. 本文從理論上分析了因孔洞而產(chǎn)生的正透鏡或負透鏡效應并給出了歸一化透過(guò)率的表達式。
