METHOD FOR DETECTING WATER PRESENCE-POSITION IN SKIN AND APPARATUS THEREFOR

摘要

PURPOSE:To make it possible to detect the state of existence of water in the depth direction of a skin by irradiating the skin with near infrared light of at least two kinds of wave lengths and detecting the amt. of light of scattered light from the skin at least at two kinds of wave lengths. CONSTITUTION:A skin sample 3 is irradiated with a light source 5 emitting a near infrared light with at least two wave lengths and an image of a horny membrane of a guinea pig which is a sample is photographed by means of an infrared vidicon camera 8 through an optical lens system 6 and a wave length selective filter 7. The wave length selective filter 7 consists of wave length selective filters 71 and 72 through which only one of two near infrared lights with two wave length is transmitted and these are alternatively used by switching. Then, output of the camera 8 is inputted into an image treating apparatus 9, where difference of the amt. of light of the scattered light detected on every wave length is obtd. and this difference in this amt. of light and the depth where water exists in the skin is obtd. based on damping properties of the near infrared light in the skin. The obtd. result is outputted by means of a video monitor 10 and a video printer 11.