Villegas Eloy A, Artal Pablo
Laboratorio de Optica, Departamento de Física, Universidad de Murcia, Campus de Espinardo (Edificio C), Murcia, Spain.
Ophthalmic Physiol Opt. 2004 Sep;24(5):419-26. doi: 10.1111/j.1475-1313.2004.00214.x.
Recently, computer numerically controlled machines have permitted the manufacture of progressive power lenses (PPLs) with different designs. However, the possible differences in optical performance among lens designs are not yet well established. In this work, the spatially resolved aberrations, at 20 relevant locations, of three PPLs with different designs were measured with a Hartmann-Shack wavefront sensor. The wavefront aberration (WA), its root mean square error (RMS) and the point-spread function were obtained. Spatially resolved plots are shown for all aberrations, astigmatism alone, and for higher order aberrations. The average RMS of all zones is also compared, and the standard deviation is used as a parameter to evaluate the level of hard-soft design. We find differences in the spatial distribution of the aberrations but not in the global RMS, indicating that current PPLs are rather similar to a waterbed, with the aberrations being the water: they can be moved but they cannot be eliminated.
最近，计算机数控机器已能够制造出具有不同设计的渐进多焦点镜片（PPL）。然而，不同镜片设计之间光学性能的可能差异尚未得到充分证实。在这项工作中，使用哈特曼-夏克波前传感器测量了三种不同设计的PPL在20个相关位置的空间分辨像差。获得了波前像差（WA）、其均方根误差（RMS）和点扩散函数。展示了所有像差、单独的像散以及高阶像差的空间分辨图。还比较了所有区域的平均RMS，并将标准偏差用作评估硬-软设计水平的参数。我们发现像差的空间分布存在差异，但全局RMS没有差异，这表明当前的PPL与水床相当相似，像差就是水：它们可以移动但无法消除。
