Skin surface properties_elasticity

There are many methods to detect the skin health, skin surface properties, skin color, skin color type, and hair conditions. They are non-intrusive.

Skin surface properties

Elasticity of skin
The skin is composed by complex material. Collagen and elastic fibers in dermis provide the elasticity when the skin is under a constant force. 
The measurement is to apply a force to record and analysis the reaction of skin firmness.
The topography of skin
Use optical method to sketch the surface of skin.

surface profile cuts are generated via a plane of light or shadow cutting the surface at an angle. The emerging cutting curve can be observed through a microscope. In the throwing-shadows technique, the length of the shadows caused by slanted lighting characterizes the peak heights of a surface.

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