title: Microelectromechanical-systems-driven two-layer rotary-blade-based adjustable iris diaphragm.
abstract: We report a miniature adjustable multi-blade iris diaphragm driven by microelectromechanical-systems-based electrostatic rotary microactuators. A proof-of-concept device is designed and fabricated using a silicon-on-insulator micromachining process. The diameter of the developed iris diaphragm aperture is experimentally demonstrated to be able to adjust from 0.45 to 1.56 mm. When used in a miniature camera lens system, the current prototype device is capable of providing an adjustment range of more than three full f/stops.
authors.affiliation: Department of Mechanical Engineering, National University of Singapore, Singapore. mpezgy@nus.edu.sg
authors.forename: Guangya
authors.initials: G
authors.lastname: Zhou
authors.forename: Hongbin
authors.initials: H
authors.lastname: Yu
authors.forename: Yu
authors.initials: Y
authors.lastname: Du
authors.forename: Fook Siong
authors.initials: FS
authors.lastname: Chau