27 February 2015 Improvement of Varioptic's liquid lens based on electrowetting: how to obtain a short response time and its application in the design of a high resolution iris biometric system
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Proceedings Volume 9375, MOEMS and Miniaturized Systems XIV; 93750S (2015) https://doi.org/10.1117/12.2075719
Event: SPIE OPTO, 2015, San Francisco, California, United States
Abstract
This communication presents the results obtained for decreasing the response time of electrowetting-based real time focus correctors (liquid lenses). In order to provide a compact iris biometric system demonstrator, we have achieved a response time at 90% of 7.5 ms for a change in focalization from 0 diopter to 10 diopter with a liquid lens having an aperture of 1.9 mm. We have used a hydrodynamic fluid reorganization model to predict the features of these fast liquid lenses and evaluated the sensivity of the response time to the different conception parameters.
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Benjamin Burger, Serge C. Meimon, Cyril Petit, Minh Chau Nguyen, "Improvement of Varioptic's liquid lens based on electrowetting: how to obtain a short response time and its application in the design of a high resolution iris biometric system", Proc. SPIE 9375, MOEMS and Miniaturized Systems XIV, 93750S (27 February 2015); doi: 10.1117/12.2075719; https://doi.org/10.1117/12.2075719
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