【摘要】 使用离子束刻蚀法成功制作高衍射效率 16阶菲涅耳透镜。菲涅耳透镜的衍射效率是评价菲涅耳透镜质量的一个重要指标。对于宽带光学系统 ,除设计、制作误差外 ,入射光波波长对菲涅耳透镜的衍射效率也有影响。针对宽带折衍混合光学系统 ,分析不同入射光波波长对菲涅耳透镜衍射效率的影响。使用四种不同光源 ,对菲涅耳透镜的衍射效率进行测试。指出在短波方向 ,衍射效率下降较多 ;在长波方向 ,衍射效率下降较少更多还原

【Abstract】 step Fresnel lens of high diffractive efficiency is fabricated by ion beam etching. Diffractive efficiency of Fresnel lens is important factor to evaluate the quality of Fresnel lens. The incident wavelength, except fabrication errors, has effect on diffractive efficiency of Fresnel lens for broadband diffractive refractive hybrid optical system. The effects of incident wavelength on diffractive efficiency of Fresnel lens are analyzed. Four kinds of laser source are used to measure the diffractive efficiency of Fresnel lens. It is pointed that the diffractive efficiency decreases greatly in short wavelength, but one decreases smally in long wavelength.更多还原