光学
飞秒
镜头(地质)
制作
焦距
材料科学
光电子学
物理
激光器
医学
替代医学
病理
作者
Xu Zhang,Lei Wang,Xiaowen Cao,Shu Jiang,Yan‐Hao Yu,Weiwei Xu,Saulius Juodkazis,Qi‐Dai Chen
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-01-16
卷期号:49 (4): 911-911
摘要
In this Letter, a method for the fabrication of bifocal lenses is presented by combining surface ablation and bulk modification in a single laser exposure followed by the wet etching processing step. The intensity of a single femtosecond laser pulse was modulated axially into two foci with a designed computer-generated hologram (CGH). Such pulse simultaneously induced an ablation region on the surface and a modified volume inside the fused silica. After etching in hydrofluoric acid (HF), the two exposed regions evolved into a bifocal lens. The area ratio (diameter) of the two lenses can be flexibly adjusted via control of the pulse energy distribution through the CGH. Besides, bifocal lenses with a center offset as well as convex lenses were obtained by a replication technique. This method simplifies the fabrication of micro-optical elements and opens a highly efficient and simple pathway for complex optical surfaces and integrated imaging systems.
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