期刊
BIOMEDICAL OPTICS EXPRESS
卷 11, 期 10, 页码 5603-5617出版社
OPTICAL SOC AMER
DOI: 10.1364/BOE.403695
关键词
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资金
- Agencia Estatal de Investigacion [PID2019-105684RB-I00]
- Fundacion Seneca [19897/GERM/15]
When the eye is exposed to pulsed infrared (IR) light, it is perceived as visible of the corresponding half wavelength. Previous studies have reported evidence that this is due to a non-linear two-photon absorption process. We have carried out a study which provides additional support to this nonlinear hypothesis. To this end, we have measured the spectral sensitivity at 2 different pulse repetition rates and have developed a theoretical model to account for the experimental observations. This model predicts a ratio between the minimum powers needed to detect the visual stimulus at the 2 pulse repetition rates employed of 0.45 if the stimulus were detected through a nonlinear effect and 1 if it were caused by a linear effect as in normal vision. The value experimentally found was 0.52 +/- 0.07, which supports the hypothesis of a nonlinear origin of the two-photon vision phenomena. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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