测量高能激光远场辐照度分布是评估激光**系统性能指标的一个有效方法。对国内外现有的几种高能激光远场辐照度分布测量方法进行了比较和归纳，对各种技术的优点和缺点作了深入的分析，并对靶面抗损伤技术、取样衰减技术和功率密度定标技术3项关键技术研究进展进行了介绍，在该基础上阐述了高能激光能量远场辐照度分布直接测量技术的发展趋势。

Current freeform illumination optical designs are mostly focused on producing prescribed irradiance distributions on planar targets. Here, we aim to design freeform optics that could generate a desired illumination on a curved target from a point source, which is still a challenge. We reduce the difficulties that arise from the curved target by involving its varying z-coordinates in the iterative wavefront tailoring (IWT) procedure. The new IWT-based method is developed under the stereographic coordinate system with a special mesh transformation of the source domain, which is suitable for light sources with light emissions in semi space such as LED sources. The first example demonstrates that a rectangular flat-top illumination can be generated on an undulating surface by a spherical-freeform lens for a Lambertian source. The second example shows that our method is also applicable for producing a non-uniform irradiance distribution in a circular region of the undulating surface.