Yoon Y
Applied Optics Section, Blackett Laboratory, Imperial College, London SW7 2B7 United Kingdom.
Appl Opt. 2000 Jun 1;39(16):2551-8. doi: 10.1364/ao.39.002551.
Since focal diffractive optics have been introduced, designing them has flourished, particularly as the manufacturing technology has developed to meet the performance requirements. My purpose is to introduce to hybrid diffractive-refractive optical systems not only the design procedure but also the optical and the mechanical aspects of optical tolerancing. A comparison is made with equivalent conventional (purely refractive) systems in the visible wave band (rather than the infrared wave band where there are many published designs) to seek advantages and disadvantages that systems with diffractive optics bring. The results of tolerancing comparisons show that for small-field systems the introduction of diffractive components has a powerful desensitizing effect, whereas for a wide-field anastigmatic system that has been investigated the desensitization effect of the inclusion of diffractive surfaces is less marked. These results come mainly from the fact that an achromatizing diffractive surface has little focal power, whereas an achromatizing refractive component has to have a large focal power.
自从引入了聚焦衍射光学器件以来，其设计得到了蓬勃发展，尤其是随着制造技术的发展以满足性能要求。我的目的不仅是向混合衍射 - 折射光学系统介绍设计过程，还介绍光学公差的光学和机械方面。在可见光波段（而非已有许多公开设计的红外波段）将其与等效的传统（纯折射）系统进行比较，以探寻具有衍射光学器件的系统的优缺点。公差比较结果表明，对于小视场系统，引入衍射元件具有强大的减敏效果，而对于所研究的宽视场消像散系统，包含衍射面的减敏效果则不太显著。这些结果主要源于这样一个事实，即消色差衍射面的焦度很小，而消色差折射元件必须具有较大的焦度。
