Method and apparatus for treating a surface with a scanning laser beam having an improved intensity cross-section
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United States of America Patent
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Aug 13, 1996
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app pub date -
Sep 13, 1995
filing date -
Sep 13, 1995
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Abstract
A method and apparatus are disclosed for laser treatment of surfaces, such as tissue. In a preferred embodiment, the invention employs a unique reflective optical delivery system which produces an improved beam intensity cross-section which reduces thermal injury, increases the precision of the tissue interaction and allows the creation of craters with decreased sizes. Reflective optics provide precise, single-layer vaporization at low power levels without thermal injury to the underlying papillary dermis. Movable optical elements focus and direct the laser beam in a scanning pattern to treat a large area of the surface.
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