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Open AccessArticle

Fast Volumetric Feedback under Microscope by Temporally Coded Exposure Camera

Graduate School of Science and Technology, Gunma University, 1-5-1, Tenjin-cho, Kiryu 376-8515, Japan
Author to whom correspondence should be addressed.
Sensors 2019, 19(7), 1606;
Received: 27 February 2019 / Revised: 22 March 2019 / Accepted: 23 March 2019 / Published: 3 April 2019
(This article belongs to the Special Issue Advanced CMOS Image Sensors and Emerging Applications)
We developed a temporally coded exposure (TeCE) camera that can cope with high-speed focus variations of a tunable acoustic gradient index (TAG) lens. The TeCE camera can execute a very short exposure multiple times at an arbitrary timing during one shot. Furthermore, by accumulating the photoelectrons generated by each exposure, it is possible to maintain the brightness even with a short exposure time. By synchronously driving the TeCE camera and the TAG lens, different focal planes of an observation target can be acquired at high speed. As a result, high-speed three-dimensional measurement becomes possible, and this can be used for feedback of three-dimensional information. In the work described in this paper, we conducted a focus tracking experiment to evaluate the feedback performance of the TeCE camera. From the experimental results, we confirmed the feedback capability of the TeCE camera. View Full-Text
Keywords: high-speed measurement; three-dimensional information; feedback control high-speed measurement; three-dimensional information; feedback control
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Yamato, K.; Yamashita, T.; Chiba, H.; Oku, H. Fast Volumetric Feedback under Microscope by Temporally Coded Exposure Camera. Sensors 2019, 19, 1606.

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