Randomly distributed anti-reflective nanostructures were fabricated on both surfaces of cylindrical lenses and freeform optical elements using a plasma-assisted reactive-ion etching technique. An average spectral transmission of 98% was measured across the wavelength range from 340 to 800 nm. Mid-band full-angle directional scatter measurements show a difference of six orders of magnitude in transmission intensity between specular and off-specular angles. Measurements before and after the etching process show little to no wavefront distortion for the cylindrical lenses. The enhanced transmission optics were used as part of the dual-unit arrayed wide-field astronomical camera system tested on the Harlan J. Smith telescope at the McDonald Observatory, and their performance was contrasted with conventional thin film coated component performance.

中文翻译：

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用于阵列宽视场天文校正单元的自由曲面元件和柱面透镜的高效抗反射修改

使用等离子体辅助反应离子蚀刻技术在柱面透镜和自由形状光学元件的两个表面上制造随机分布的抗反射纳米结构。在 340 至 800 nm 的波长范围内测得平均光谱透射率为 98%。中频带全角度定向散射测量显示镜面反射角和非镜面反射角之间的传输强度存在六个数量级的差异。蚀刻过程前后的测量显示柱面透镜的波前畸变很小甚至没有。增强型传输光学器件被用作双单元阵列宽视场天文相机系统的一部分，在麦克唐纳天文台的哈兰·J·史密斯望远镜上进行了测试，并将其性能与传统薄膜涂层组件的性能进行了对比。