second critical angle 中文意思是什麼
second critical angle
解釋
第二臨界角-
This paper analyses the critical angle method that often use in focus detected. we receive two relations, the first relation between refractive index of the critical - angle prism and focus - error signal ; the second relation between numerical aperture of object lens and out - of - focus error signal
本文針對伺服系統中常用的調焦方法-臨界角方法進行了分析,理論上得到臨界角棱鏡的折射率、物鏡的數值孔徑與離焦誤差信號的關系。
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