Liquid Zoom.pdf

Variable Focus Liquid Lens A Technology Developed by A*STAR’s Institute of Materials Research Engineering Introduction ? What is Variable Focus Liquid Lens? – A type of lens made out of a liquid. – Allows focus and zoom capability for miniature cameras which currently rely on a fixed focus, solid lens. Conventional Camera Human Eye Lens stretching to increase focal length Lens rounding to shorten focal length How Does A Liquid Lens Function? Much like the lens of the Human Eye Length between lens and focal plane adjusted to focus image. Shape and curvature of the lens changed to focus image Fluid lens actuator Lens How Does IMRE’s Variable Focus Liquid Lens Chip Function Bi-concave lens - long focal length Bi-convex lens - short focal length IMRE’s Variable Focus Liquid Lens In Operation Some Possible Variable Focus Liquid Lens Configurations Liquid B. Singlet-Lens System Equi-Convex Equi-Concave Biconvex Convex- Concave A. Doublet-Lens System Imaging With Variable Focus Liquid Lens Focusing?at?near?objects?(a)?Without?liquid? lens?(b)?With?liquid?lens.?The?object?placed? at?a?distance?of?15?mm?from?the?camera?lens. Zoom?capabilities?of?our?liquid?lens (a) (b) IMRE’s Variable Focus Liquid Lens Integrated On A Hand Phone Zoom Capability Of The Variable Focus Liquid Lens Picture?of?text?taken?by? handphone cameras?with?(left)? and?without?(right)?the?liquid? lens?placed?at?a?distance?of?10? mm?from?the?camera?lens. Features Of IMRE’s Liquid Lens ? Optical focus/zoom system that has no moving parts ? Low cost ? Compact in size (10μm – 10 mm) ? Concave or convex lens can be formed in the same lens chip ? Electricity not required when used in manual mode ? Electricity used to drive the actuator in auto focus mode, but is not required to sustain the lens curvature at a particular curvature Telecommunications: Optical switches, fibre optic coupling, mobile phone cameras, webcams Data storage: CD, DVD, barcode readers Analytical equipment: Por