A  passive autofocus system by using standard deviation of the image on a liquid lens

Pejman Rasti; Arko Kesküla; Henry Haus; Helmut F. Schlaak; Gholamreza Anbarjafari; Alvo Aabloo; Rudolf Kiefer

doi:10.1117/12.2084198

1 April 2015 A passive autofocus system by using standard deviation of the image on a liquid lens

Pejman Rasti, Arko Kesküla, Henry Haus, Helmut F. Schlaak, Gholamreza Anbarjafari, Alvo Aabloo, Rudolf Kiefer

Proceedings Volume 9430, Electroactive Polymer Actuators and Devices (EAPAD) 2015; 94301Q (2015) https://doi.org/10.1117/12.2084198
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

Today most of applications have a small camera such as cell phones, tablets and medical devices. A micro lens is required in order to reduce the size of the devices. In this paper an auto focus system is used in order to find the best position of a liquid lens without any active components such as ultrasonic or infrared. In fact a passive auto focus system by using standard deviation of the images on a liquid lens which consist of a Dielectric Elastomer Actuator (DEA) membrane between oil and water is proposed.

Citation Download Citation

Pejman Rasti, Arko Kesküla, Henry Haus, Helmut F. Schlaak, Gholamreza Anbarjafari, Alvo Aabloo, and Rudolf Kiefer "A passive autofocus system by using standard deviation of the image on a liquid lens", Proc. SPIE 9430, Electroactive Polymer Actuators and Devices (EAPAD) 2015, 94301Q (1 April 2015); https://doi.org/10.1117/12.2084198

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