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

Benjamin Burger; Serge C. Meimon; Cyril Petit; Minh Chau Nguyen

doi:10.1117/12.2075719

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

Benjamin Burger, Serge C. Meimon, Cyril Petit, Minh Chau Nguyen

Author Affiliations +

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.

Citation Download Citation

Benjamin Burger, Serge C. Meimon, Cyril Petit, and 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); https://doi.org/10.1117/12.2075719

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