波前像差基本理论ppt参考课件.ppt

* * So, what is the wavefront. Line that is perpendicular to all the rays. While it is a bit more abstract in the sense of understanding the light paths, it is simpler than rays because many rays can be represented by a single wavefront surface. Parallel beam = plane or flat wavefront Converging beam = spherical wavefront * If the lens has aberrations …. * In reverse, a similar ray distortion take place except now that wave aberration is a distortion of an otherwise plane wave. * In reverse, a similar ray distortion take place except now that wave aberration is a distortion of an otherwise plane wave. 波前像差基本理论 什么是波前(Wavefront)? 平行光线 什么是波前? 理想波前 变形的波前 模糊成像 平行光线 什么是波前? 不规则波前 理想波前 平行光线 什么是波前? 不规则波前 理想波前 什么是波前像差? 像差 理想波前 -3 -2 -1 0 1 2 3 -3 -2 -1 0 1 2 3 Wavefront Aberration mm (right-left) mm (superior-inferior) 3 Dimensional View 2 Dimensional View 波前像差的表示方法 低阶像差 高阶像差 波前像差的表示方法－ Zernike多项式 像差的表示方法－均方根（RMS）　 有时也称方均根。Root Mean Square（RMS）.将N个项的平方和处以N后开平方的结果，即方均根的结果。 WF-RMS= ？ RMS = 像差的表示方法－点扩散函数（PSF） 　表示一点经光学系统成像后的光强分布 波前像差的检查方法 基于Shack-hartmann原理的Wavescan 　 波前像差的检查方法 基于Shack-hartmann原理的Wavescan 　 * * So, what is the wavefront. Line that is perpendicular to all the rays. While it is a bit more abstract in the sense of understanding the light paths, it is simpler than rays because many rays can be represented by a single wavefront surface. Parallel beam = plane or flat wavefront Converging beam = spherical wavefront * If the lens has aberrations …. * In reverse, a similar ray distortion take place except now that wave aberration is a distortion of an otherwise plane wave. * In reverse, a similar ray distortion take place except now that wave aberration is a distortion of an otherwise plane wave.