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Laser-induced thermoelastic effects can evoke tactile sensations
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Journal Article
Laser-induced thermoelastic effects can evoke tactile sensations
2015
Overview
Humans process a plethora of sensory information that is provided by various entities in the surrounding environment. Among the five major senses, technology for touch, haptics, is relatively young and has relatively limited applications largely due to its need for physical contact. In this article, we suggest a new way for
non-contact
haptic stimulation that uses
laser
, which has potential advantages such as mid-air stimulation, high spatial precision and long working distance. We demonstrate such tactile stimulation can be enabled by laser-induced thermoelastic effects by means of physical and perceptual studies, as well as simulations. In the physical study, the mechanical effect of laser on a human skin sample is detected using low-power radiation in accordance with safety guidelines. Limited increases (< ~2.5 °C) in temperature at the surface of the skin, examined by both thermal camera and the Monte Carlo simulation, indicate that laser does not evoke heat-induced nociceptive sensation. In the human EEG study, brain responses to both mechanical and laser stimulation are consistent, along with subjective reports of the non-nociceptive sensation of laser stimuli.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ EEG
/ Female
/ Humanities and Social Sciences
/ Humans
/ Lasers
/ Male
/ Mechanotransduction, Cellular
/ Science
/ Skin
/ Touch
