基于PWC法的宽波段复消色光学系统设计

提出了应用普通光学玻璃和折射方式，实现0．4～2．5μm宽波段范围内中小相对孔径较小视场光学系统复消色的设计方法。推导了基于PWC法的三胶合透镜初始解求取公式，加入位置色差、色球差等限制因素，提出了一种新的材料选择方法，由玻璃库中选择消色差效果最佳的材料组合，其色离焦量为应用最初算法求出结果的1／3。给出了工作F／IO的转像系统和F／4．5的望远系统两个光学设计结果，0．4μm、1．0μm和2．5μm三波长实现了复消色，传递函数接近衍射极限。证明了普通光学玻璃实现0．4～2．5μm宽波段范围内的中小相对孔径光学系统复消色设计的可行性。

Wide waveband apochromatic optical systems design based on PWC method

In this paper,a new method was proposed to design middle F number and small field apochromatic optical systems with proper glass and a refractive structure in a wide waveband from 0.4 to 2.5μm.The arithmetic of the triplet lens' initial configuration based on the PWC method was discussed.A new method which could choose the appropriate glass from catalog to eliminate the chromatic very well was discussed.It was composed with the arithmetic and the calculation of longitudinal aberration and spherochromatism.The defocus was reduced to the 1/3 compared with the results calculated by the classic methods.Two examples were presented in details,one was a relay lens with work F/10,the other was a telescope with F/4.5,both systems were apochromatic in the wavelengths of 0.4μm,1.0μm and 2.5μm.The MTF was within the diffraction limit.So it was demonstrated that usual optical glass could be used to design the middle F number and small field apochromatic optical system with the wide waveband from 0.4 to 2.5μm.