A new simulator of the human head and animal bodies mimics moisture
transpiration from eyes and skin and heat emission. The present invention
used to demonstrate and quantify anti-fogging performance of goggles and
apparel. Thin water permeable membranes are mounted onto a container
containing a thermostatically controlled, heated and stirred reservoir of
water as a simulation of the moisture source of the human eyes and skin.
A light source and optical mesh patterns help illuminate water
condensation on the inner lens of the goggles. The simulator results in a
reliable and convenient demonstration and testing system for moisture
condensation in goggle lenses, and heat and moisture apparel.