Generally, tracking control for optical disk system is accomplished by the feedback control designed by using PID control, repetitive control and so on. However, it is difficult to reduce the tracking error on condition of high disk rotation speed. In the near future, the disk rotation speed of the optical disk system becomes higher than 10000[rpm]. Therefore, the tracking servo system for opti...

The analysis of transitions between areas of interest (AOIs) in eye tracking data provides insight into visual reading strategies followed by participants. We present a new approach to investigate eye tracking data of multiple participants, recorded from video stimuli. Our new transition trees summarize sequence patterns of all participants over complete videos. Shot boundary information from t...

This paper presents the design and implementation of a sliding-mod controller for tracking servo of optical disk drives. The tracking servo is majorly subject to two disturbance sources: radial run-out and shock. The lateral run-out disturbance is mostly repeatable, and a model of such disturbance is incorporated into the controller design to effectively compensate for it. Meanwhile, as a shock...

There is a growing demand for high-accuracy and frameless solutions for cranial radiation therapy. Among different approaches for intra-fractional head tracking using X-Ray or MV imaging or Cone Beam CT, optical head tracking in particular promises high spatial and temporal resolution with a minimum of system latency and no additional dose exposition. It may therefore be ideal for motion-compen...

We demonstrate an integrated holographic optical tweezers system with double-helix point spread function (DH-PSF) imaging for high precision three-dimensional multi-particle tracking. The tweezers system allows for the creation and control of multiple optical traps in three-dimensions, while the DH-PSF allows for high precision, 3D, multiple-particle tracking in a wide field. The integrated sys...

NASA/PL has been developing technologies for a novel and unified approach to point a laser beam from deep space with sub-micro-radian precision for optical communication systems. The approach is based on using high bandwidth inertial sensors to compensate for jitter excursions caused by spacecraft vibrations. This novel use of high bandwidth inertial sensors enables the implementation of laser ...

We introduce optical fiber illumination for real-time tracking of optically trapped micrometer-sized particles with microsecond time resolution. Our light source is a high-radiance mercury arc lamp and a 600 μm optical fiber for short-distance illumination of the sample cell. Particle tracking is carried out with a software implemented cross-correlation algorithm following image acquisition fro...

in this paper, a robust pid control scheme is proposed for micro-electro-mechanical-systems(mems) optical switches. the proposed approach is designed in a way which solves twochallenging and important problems. the first one is successful reference tracking and the second ismitigating the system nonlinearities. the overall system composed of nonlinear mems dynamicsand the pid controller is prov...

Tracking user movements is one of the major low-level tasks which every Virtual Reality (VR) system needs to fulfill. There are different methods how this tracking may be performed. Common tracking systems use magnetic or ultrasonic trackers in different variations as well as mechanical devices. All of these systems have drawbacks which are caused by their principles of work. Typically, the use...

BACKGROUND In image-guided robotic interventions, an error component is related to the positioning error of the manipulator. Therefore, measuring the kinematic error is required during robot development. However, no specialized measurement device exists for this task. This study explores the possibility of using optical tracking for robot measurement. METHODS A CNC machine is used to position...