Optical Transmittance
Optical Transmittance - Related Videos
08:43
Long-term Continuous EEG Monitoring in Small Rodent Models of Human Disease Using the Epoch Wireless Transmitter System
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Cited by 26 •
2015
Here we demonstrate the use of a wireless enabling technology for electroencephalogram (EEG) in neonatal rodent models of human disease. With telemetry, there are no encumbering connections, thus allowing natural behaviors.
08:31
Three-dimensional Optical-resolution Photoacoustic Microscopy
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Cited by 27 •
2011
Optical-resolution photoacoustic microscopy (OR-PAM) is an emerging technology capable of imaging optical absorption contrasts in vivo with cellular resolution and sensitivity. Here, we provide a visualized instruction on the experimental protocols of OR-PAM, including system configuration, system alignment, typical in vivo experimental procedures, and functional imaging schemes.
09:11
Implantation of Radiotelemetry Transmitters Yielding Data on ECG, Heart Rate, Core Body Temperature and Activity in Free-moving Laboratory Mice
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Cited by 56 •
2011
A surgical technique for implantation of commercially available telemetry transmitters used for continuous measurement of biopotential (one-lead ECG), heart rate, core body temperature and locomotor activity in freely moving mice is shown. Recommendations and protocols for post-operative care and pain relief, improving recovery, well being and survival rate are also presented.
09:39
Optical Biosensing
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2023
Optical biosensors utilize light to detect the binding of a target molecule. These sensors can utilize a label molecule, which produces a measurable signal such as fluorescence, or these sensors can be label-free and use the changes in optical properties, such as refractive index, to sense for the binding of the target molecule. This video introduces both label and label-free optical biosensors, demonstrates their use in the laboratory, and shows some applications of the technology.
13:39
Optical Trapping of Nanoparticles
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Cited by 7 •
2013
The following setup approach details low power optical trapping of dielectric nanoparticles using a double-nanohole in metal film.
FAQs
The measured signal can fall for three different reasons: absorption removes light within the material, reflection redirects light at its surfaces, and scattering sends light away from the detector. Separating these effects matters because a low reading may indicate bulk material behavior, surface behavior, or optical redirection rather than one single defect.
Reporting a wavelength or spectral range preserves information that a single value can hide. A component may transmit light differently across the measured region because its material composition or optical behavior changes with wavelength. Engineers therefore select the reporting format according to whether they need a general percentage or a spectrum for characterization, comparison, or design.
Changes across a measured spectrum can signal differences in material composition or surface and manufacturing condition. This makes the measurement useful beyond pass-through performance: engineers can compare a component with expected optical behavior, identify quality variations, and decide whether it is suitable for an imaging or photonic system.
A percentage is most useful when its measurement wavelength is specified, because the reported value can change across the spectrum. Stating the wavelength or spectral range allows engineers to interpret the result correctly and compare materials, coatings, filters, or other components under the same optical condition.
They should consider whether absorption, reflection, or scattering is responsible, and whether the result was obtained at one wavelength or across a spectrum. The detector reading alone does not identify the cause. Examining the spectral pattern and measurement context can support judgments about material, surface, or manufacturing quality.
These measurements apply to glass, polymers, coatings, optical filters, and other optical components. The results help engineers characterize how these materials perform and whether their behavior fits a system requirement. This is especially relevant when selecting or evaluating parts for imaging and photonic systems, where transmitted light affects component suitability.
Designers use measured percentages or spectra to choose materials and components with suitable light-passing behavior. For windows, sensors, and displays, the data can guide component selection and performance evaluation. In energy-efficient optical devices, transmittance information supports designs that provide the required optical behavior while helping assess material and component quality.