A large stroke magnetic fluid deformable mirror for focus control

A liquid deformable mirror, which can provide a large stroke deflection more than 100 μm, is proposed for focus control. The deformable mirror utilizes the concept of magnetic fluid deformation shaped with electromagnetic fields to achieve concave or convex surface and to change the optical focus de...

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Bibliographic Details
Published inOptoelectronics letters Vol. 12; no. 2; pp. 115 - 118
Main Author 闵令坤 吴智政 黄明双 孔祥会
Format Journal Article
LanguageEnglish
Published Tianjin Tianjin University of Technology 01.03.2016
Subjects
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
可变形反射镜
大行程
磁流体
种用
纳米颗粒增强
聚焦控制
自适应光学系统
表面形状
A
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Summary:A liquid deformable mirror, which can provide a large stroke deflection more than 100 μm, is proposed for focus control. The deformable mirror utilizes the concept of magnetic fluid deformation shaped with electromagnetic fields to achieve concave or convex surface and to change the optical focus depth of the mirrors. The free surface of the magnetic fluid is coated with a thin layer of metal-liquid-like film（MELLF） prepared from densely packed silver nanoparticles to enhance the reflectance of the deformable mirror. The experimental results on the fabricated prototype magnetic fluid deformable mirror（MFDM） show that the desired concave/convex surface shape can be controlled precisely with a closed-loop adaptive optical system.
Bibliography:12-1370/TN
A liquid deformable mirror, which can provide a large stroke deflection more than 100 μm, is proposed for focus control. The deformable mirror utilizes the concept of magnetic fluid deformation shaped with electromagnetic fields to achieve concave or convex surface and to change the optical focus depth of the mirrors. The free surface of the magnetic fluid is coated with a thin layer of metal-liquid-like film（MELLF） prepared from densely packed silver nanoparticles to enhance the reflectance of the deformable mirror. The experimental results on the fabricated prototype magnetic fluid deformable mirror（MFDM） show that the desired concave/convex surface shape can be controlled precisely with a closed-loop adaptive optical system.
mirror silver concave densely desired reflectance packed coated precisely convex
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-016-5245-9