<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Gurtner, Martin</style></author><author><style face="normal" font="default" size="100%">Jiří Zemánek</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Twin-beam real-time position estimation of micro-objects in 3D</style></title><secondary-title><style face="normal" font="default" size="100%">Measurement Science and Technology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Meas. Sci. Technol.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2016</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">27</style></volume><pages><style face="normal" font="default" size="100%">127003</style></pages><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span&gt;Various optical methods for measuring positions of micro-objects in 3D have been reported in the literature. Nevertheless, the majority of them are not suitable for real-time operation, which is needed, for example, for feedback position control. In this paper, we present a method for real-time estimation of the position of micro-objects in 3D&lt;/span&gt;&lt;span&gt;; the method is based on twin-beam illumination and requires only a very simple hardware setup whose essential part is a standard image sensor without any lens. The performance of the proposed method is tested during a micro-manipulation task in which the estimated position served as feedback for the controller. The experiments show that the estimate is accurate to within  ~3 μm in the lateral position and  ~7 μm in the axial distance with the refresh rate of 10 Hz. Although the experiments are done using spherical objects, the presented method could be modified to handle non-spherical objects as well.&lt;/span&gt;&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">12</style></issue></record></records></xml>