Design,fabrication and characteristics of optofluidic variable aperture based on electromagnetic-driving  

作　　者：ZHANG Anning ZHAO Rui WEI Xian LIANG Zhongcheng HAN Zefeng 

机构地区：[1]Center of Optofluidic Technology,College of Optoelectronic Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China

出　　处：《Optoelectronics Letters》2024年第12期705-708,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61775102);the Youth Program of National Natural Science Foundation of China(No.61905117)。

摘　　要：An electromagnetic-driving variable liquid aperture is designed and fabricated.It consists of a driving cavity,an optical cavity and a storage chamber,a polydimethylsiloxane(PDMS)elastic film,an annular magnet and a driving coil.The driving cavity is filled with dyeing liquid,while the colorless transparent liquid fills the optical cavity and the storage chamber.When applying current,the annular magnet moves downward driven by the magnetic field,leading to deformation of the PDMS film.Being squeezed by the moving magnet with the deforming film,the dyeing liquid flows from the driving cavity into the optical cavity,which contributes to the decrease of the clear aperture diameter in the optical cavity.Our proposed aperture performs continuous variable ability up to 2.775 mm in diameter of clear aperture,when the current increases from 0 to 0.33 A,and its relative transmittance ranges from 98.539% to 22.776%.

关 键 词：ANNULAR FILM FILLED 

分 类 号：O441[理学—电磁学]