Imaging of skin thermal properties by changing ambient radiation temperature-an electrical control system for stepwise change in ambient radiation temperature

A practical measurement system has been developed for creating an image of skin thermal properties using a stepwise change in ambient radiation temperature. By introducing a capacitor discharge circuit, more rapid stepwise change in ambient temperature was achieved, at a rate 30% faster than a mechanical system. Numerous experiments were performed using the authors' present system on the facial skin of the cheek. The repeatability of thermal properties of the same subject suggests that the present system is reliable for practical use.