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