DocumentCode :
3464269
Title :
Thermally actuated liquid tunable microlens with embedded thermoelectric driver and sub-second response time
Author :
Ashtiani, A.O. ; Jiang, Hongbo
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Wisconsin-Madison, Madison, WI, USA
fYear :
2013
fDate :
16-20 June 2013
Firstpage :
2604
Lastpage :
2607
Abstract :
This paper reports a thermally actuated microlens. The microlens has an embedded thermoelectric heat pump that drives a water based heat engine. In the liquid heat engine, the water temperature is changed to tune the lens through the thermal expansion of water. The shape of a pinned water meniscus at an aperture is deformed in response to the net volume change in the water, creating a tunable lens with sub-second thermal response time (0.8 second). By a temperature change from 20°C to 30°C, focal length of the microlens varies continuously from -22.6 mm to ±∞ and then to +22.6 mm.
Keywords :
heat engines; heat pumps; microactuators; microfabrication; microlenses; thermoelectric devices; aperture deformation; embedded thermoelectric heat pump driver; focal length; liquid heat engine; pinned water meniscus; sub-second thermal response time; temperature 20 degC to 30 degC; thermal expansion; thermally actuated liquid tunable microlens; time 0.8 s; water based heat engine; water temperature; Glass; Heat engines; Lenses; Liquids; Microoptics; Water heating; Liquid microlens; micro-optics; thermoelectric device; tunable focus;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013 Transducers & Eurosensors XXVII: The 17th International Conference on
Conference_Location :
Barcelona
Type :
conf
DOI :
10.1109/Transducers.2013.6627339
Filename :
6627339
Link To Document :
بازگشت