Abstract Spectral diffraction lenses that have the same focusing distance for several specified wavelengths are proposed as a basis for a point light source with several specified wavelengths. A spectral diffraction lens designed to focus three wavelengths, 462, 608, and 952 nm (the wavelengths used to excite tubulin $$\beta$$ fluorescence), is considered. For the production of spectral lenses, the method of direct laser recording using a photoresist with iterative correction of the recording parameters was used, which provided an error in the formation of the height of the diffraction microrelief of less than 30 nm. An experiment is presented to determine the wavelengths focused by the resulting lens, which is based on the use of a point diaphragm located in the focus of the spectral lens.

中文翻译：

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用于形成发射多个指定波长的光源的光谱衍射透镜

摘要 提出了对多个指定波长具有相同焦距的光谱衍射透镜作为具有多个指定波长的点光源的基础。考虑设计用于聚焦三个波长 462、608 和 952 nm（用于激发微管蛋白 $\beta$$ 荧光的波长）的光谱衍射透镜。对于光谱透镜的生产，使用光刻胶直接激光记录的方法对记录参数进行迭代校正，这提供了小于 30 nm 的衍射微浮雕高度的形成误差。提出了一个实验来确定最终透镜聚焦的波长，该实验基于使用位于光谱透镜焦点的点光阑。