Paper Info
Title
High-speed liquid lens for computer vision
Abstract
We report a high-speed liquid lens, called a Dynamorph Lens (DML), and its applications in the field of computer vision. The developed lens uses a liquid-liquid interface as a variable refractive surface. The interface shape is controlled by the volume of a liquid chamber using a high-speed piezostack actuator. A developed prototype demonstrated both millisecond-order response speed and practical optical performance. A high-speed focusing vision system that can adaptively control its focal length in based on visual feedback by using the DML prototype coupled with a high-speed imager is also proposed. High-speed autofocusing within 15.8 ms and focus tracking of a moving object were demonstrated using the developed system. The DML prototype was also applied to high-speed focus scanning of a camera lens at 500 Hz. An image sequence was captured at 8000 fps through the lens so that every eight images were captured with a different focus, and a 1000 fps video with extended depth of field was successfully synthesized.
Year
DOI
Venue
2010
10.1109/ROBOT.2010.5509471
Robotics and Automation
Keywords
Field
DocType
computer vision,lenses,DML prototype,computer vision,dynamorph lens,high-speed autofocusing,high-speed focusing vision system,high-speed imager,high-speed liquid lens,high-speed piezostack actuator,image sequence,liquid-liquid interface,variable refractive surface,visual feedback
Computer vision,Machine vision,Refraction,Optics,Focal length,Lens (optics),Camera lens,Artificial intelligence,Through-the-lens metering,Engineering,Depth of field,Actuator
Conference
Volume
Issue
ISSN
2010
1
1050-4729 E-ISBN : 978-1-4244-5040-4
ISBN
Citations 
PageRank 
978-1-4244-5040-4
2
0.55
References 
Authors
2
2
Name
Order
Citations
PageRank
Hiromasa Oku17416.39
Masatoshi Ishikawa2619.33