Liu Aimei, Lv Hao, Tong Jufang, Yi Xunong, Li Qianguang, Wang Xinmin, Ding Yaoming
Department of Physics, Xiaogan University, Xiaogan 432000, China.
J Opt Soc Am A Opt Image Sci Vis. 2009 Dec;26(12):2512-4. doi: 10.1364/JOSAA.26.002512.
We establish theoretically the relationship between the lateral magnification m and the object distance L(0) for a gradient refractive index (GRIN) square lens and a GRIN rod lens. Through the linear fit of the object distance and the reciprocal of the magnification for different image locations, we use the imaging method to measure the central refractive index n(0) and focusing constant alpha of the GRIN square lens and the GRIN rod lens. The center refractive indices and focusing constant alpha of the GRIN square lens and the GRIN rod lens are 1.611 and 1.609, 0.0926 and 0.100, respectively. For the GRIN square lens and the GRIN rod lens, the measured central refractive indices are accurate to 10(-3).
我们从理论上建立了梯度折射率（GRIN）方形透镜和GRIN棒透镜的横向放大率m与物距L(0)之间的关系。通过对不同像位置的物距和放大率倒数进行线性拟合，我们采用成像方法测量了GRIN方形透镜和GRIN棒透镜的中心折射率n(0)和聚焦常数α。GRIN方形透镜和GRIN棒透镜的中心折射率和聚焦常数α分别为1.611和1.609、0.0926和0.100。对于GRIN方形透镜和GRIN棒透镜，测量得到的中心折射率精确到10^(-3)。
