Infrared Photo Refractor
Infrared Photo Refractor - Related Videos
07:03
Imaging Denatured Collagen Strands In vivo and Ex vivo via Photo-triggered Hybridization of Caged Collagen Mimetic Peptides
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Cited by 18 •
2014
This procedure demonstrates in vivo near IR fluorescence imaging of collagen remodeling activities in mice as well as ex vivo staining of collagens in tissue sections using caged collagen mimetic peptides that can be photo-triggered to hybridize with denatured collagen strands.
08:11
Infrared Spectroscopy
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2023
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate the use of infrared (IR) spectroscopy (also known as vibrational spectroscopy) to elucidate the identity of an unknown compound by identifying the functional group(s) present. IR spectra will be obtained on an IR spectrometer using the attenuated total reflection (ATR) sampling technique with a neat sample of the unknown.
07:14
In situ Photo-rheology Monitors Viscoelastic Changes in Photo-responsive Polymer Networks
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2025
We describe a procedure used to collect in situ photo-rheology measurements of polymeric materials undergoing photo-responsive liquid-to-solid transitions.
05:47
Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
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Cited by 2 •
2018
Here, we present a protocol to prepare charge transfer chromophores based on a polyoxometalate/polymer composite membrane.
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
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Cited by 4 •
2015
We describe the generation of far-infrared radiation using an optically pumped molecular laser along with the measurement of their frequencies with heterodyne techniques. The experimental system and techniques are demonstrated using difluoromethane (CH2F2) as the laser medium whose results include three new laser emissions and eight measured laser frequencies.
FAQs
The instrument infers optical focus from the retinal reflex rather than requiring a verbal report. Infrared illumination produces a returning pattern whose position, size, and brightness vary with defocus. Those measurable changes are converted into an estimate of focusing power, allowing investigators to track refractive state objectively during visual testing.
Position, size, and brightness provide complementary indicators of how the eye is focused. Defocus alters the returning retinal pattern, and analyzing these changes helps estimate the eye’s refractive state and accommodation. Considering several properties of the reflex allows the recording to capture changes in focusing behavior rather than relying on a single optical measurement.
Accommodation reflects the eye’s focusing response and can therefore connect optical changes with neural control of vision. Measuring it objectively helps investigators examine how visual systems operate, develop, and guide behavior. Because the recording does not depend on a participant describing what is seen, it is useful when studying visual responses that are difficult to assess verbally.
A recording begins when the device projects infrared light into the eye. The instrument then analyzes the returning retinal reflex, focusing on its position, size, and brightness. Changes in that pattern are interpreted as evidence of defocus and used to estimate refractive state or focusing power, producing a rapid optical measure for subsequent analysis.
Infants and animal models may not provide reliable verbal responses during visual testing. Infrared photorefraction offers rapid, objective recordings that can estimate refractive development and accommodation without requiring such responses. This makes the approach valuable for comparing how visual optics change across development and for examining visual function in experimental models.
The measurements provide an optical view of focusing during studies of visual behavior. By estimating accommodation and refractive state, investigators can relate changes in eye optics to the operation of the visual system and to visually guided actions. In neuroscience, this supports research connecting eye development, focusing control, and behavior without depending on verbal reports.