Interferometric Tracking
Interferometric Tracking - Related Videos
11:04
Biomolecular Detection employing the Interferometric Reflectance Imaging Sensor (IRIS)
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Cited by 2 •
2011
Quantitative, high-throughput, real-time, and label-free biomolecular detection (DNA, protein, etc.) on SiO2 surfaces can be achieved using a simple interferometric technique which relies on LED illumination, minimal optical components, and a camera. The Interferometric Reflectance Imaging Sensor (IRIS) is inexpensive, simple to use, and amenable to microarray formats.
05:55
Multiple Object Tracking
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University In a staggeringly complex and engaging world, it is crucial to selectively process some stimuli at the expense of others. Experimental psychologists call this ability attention. Specifically, visual attention refers to the ability to selectively process aspects of a visual scene. Many paradigms used to study visual attention involve brief, punctuated, and repeated trials. However, everyday situations often place sustained demands...
06:19
Eye Tracking in Cognitive Experiments
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2023
Eye tracking as the name suggests involves tracking of eye-movements. It is a non-invasive, sensitive tool that quantifies and measures eye-movements to describe an individuals' cognitive state. An eye-movement between two fixation points is called a saccade, which is one of the fastest motor movements in our body. By observing the profiles of these eye movements, scientists can better understand neural deficits in patients with cognitive impairments. In this video, we will first look at an...
09:03
Eye Tracking Young Children with Autism
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Cited by 93 •
2012
Eye tracking has long been used to study gaze patterns in typically-developing individuals, but recent technological advancements have made its use with clinical populations, including autism, more feasible. While eye-tracking young children with autism can offer insight into early symptom manifestations, it involves methodological challenges. Suggestions for best practices are provided.
07:36
C. elegans Tracking and Behavioral Measurement
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Cited by 14 •
2012
We have developed a video-rate tracking microscope system that can record and quantify C. elegans behavior at high resolution and high speeds. We have also developed computational methods to reduce the dimensionality of the worm images to a fundamental set of measurements that completely describe the shape of the worm.
FAQs
As the tracked particle or specimen moves, the interference pattern produced by the probe beam changes. Analyzing those changes over time allows the measurement system to associate pattern variation with displacement. This relationship supports position tracking at nanometer-scale sensitivity, while rapid pattern measurements help resolve motion occurring on short timescales.
Coherence allows the probe beam and light associated with the particle or specimen to produce a measurable interference pattern. The resulting pattern provides the signal used to identify changes in position or motion. Without this light-wave interaction, the measurement would not obtain the displacement information that distinguishes interferometric tracking from simple observation.
Interferometric tracking can follow beads, cells, membranes, or molecular-scale movements without relying solely on fluorescent labels. This expands the types of biological measurements that can be considered when labeling is limited or not the only desired signal. The approach therefore complements fluorescence-based strategies in studies of motion, mechanics, and biomolecular behavior.
The method can quantify the position or motion of microscopic objects, including beads, cells, membranes, and molecular-scale components. Its combination of nanometer-scale sensitivity and high temporal resolution is relevant when researchers need to examine small displacements as well as changes occurring rapidly. These measurements connect optical motion data with cellular and biomolecular dynamics.
A typical measurement begins when a coherent probe beam interacts with the selected particle or specimen. The resulting interference pattern is then observed and analyzed as it changes. Pattern changes are converted into information about displacement, producing a time-resolved record of motion that can be used for subsequent mechanical or biological interpretation.
Researchers may choose this approach when they need to quantify cellular mechanics, transport, force generation, or biomolecular dynamics. It is especially relevant when measurements require both very small displacement sensitivity and high temporal resolution. The technique also supports studies involving engineered tissues and precision measurement platforms, where microscopic motion can provide functional information.
Interferometric measurements can provide quantitative information about how biological structures move and respond. In bioengineering, those data can support analysis of cellular mechanics, transport processes, force generation, and molecular-scale dynamics. The resulting measurements contribute to the development of diagnostic tools, engineered tissues, and precision measurement platforms by linking microscopic motion with system behavior.