A method for the treatment of skin including the steps of determining the skin depth for energy absorption necessary for treatment; and generating a spot size for energy impinging on the skin to provide a desired amount of energy to the desired depth for treatment. In one embodiment the selected spot...http://www.google.se/patents/US7837675?utm_source=gb-gplus-sharePatent US7837675 - Method and device for skin treatment with replaceable photosensitive window