Abstract
OTTER (opto-thermal transient emission radiometry) is an infrared remote sensing technology that has been extensively used in skin measurements. It is non-contact, non-invasive, and has a unique depth profiling capability. By selecting different detection wavelengths, OTTER can be used for different types of skin measurements, such as skin hydration measurements and skin topically applied substance measurements, etc. By plotting the results at different detection wavelengths, we can have an opto-thermal detection spectrum. Combining with OTTER’s unique depth profiling capability, we can get a depth-resolved opto-thermal detection spectrum. This is a powerful tool that can be used for many skin studies. Here we will present our latest study with details on the apparatus setup, theoretical background, as well as experimental results.
Highlights
Opto-thermal radiometry, or photothermal radiometry, is an infrared remote sensing technique that was originally developed back in the 1980s [1,2]
The OTTER signal is divided into progressive pieces, e.g., every piece is starting from the same beginning, and progressively increased in length, see Figure 2b
All the volunteers were acclimatized for 15 min before the measurements
Summary
Opto-thermal radiometry, or photothermal radiometry, is an infrared remote sensing technique that was originally developed back in the 1980s [1,2]. By analyzing the shape (opto-thermal transient emission radiometry), originally developed by Imhof et al [2,12,13] and of the measured signal, we can get information on the sample’s optical properties, thermal properties, subsequently by Xiao et al [13,14,15,16,17,18,19,20,21,22,23,24], has been intensively used for skin measurements. By plotting the OTTER results at different detection spectrum with OTTER’s depth profiling capability, we can get a unique depth-resolved detection wavelengths, we can have an opto-thermal detection spectrum. This will be a powerful tool that can be used for many skin studies
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