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US 8,540,701 B2Granted
Hair treatment system
AssigneeThe Invention Science Fund I, LLC
InventorsBran Ferren, Muriel Y. Ishikawa, Edward K. Y. Jung, Nathan P. Myhrvold, Clarence T. Tegreene, Lowell L. Wood, Jr.
Life of this patent
Estimating the term…
Abstract
Embodiments of methods and systems for hair treatment are disclosed. According to various embodiments, light is used to shave, trim, or otherwise modify hair shafts.
Claims15
A hair removal method comprising:
- a) manually positioning a handheld device containing a light source adjacent to a skin surface;
- b) detecting or determining a distance of said light source from the skin surface with a proximity sensor in said handheld device;
- and
- c) if said determined distance is within a specified range, activating said light source responsive to said detecting or determining a distance of said light source from the skin surface with a proximity sensor in said handheld device to generate a highly convergent beam of a frequency band significantly absorbed by hair and having a narrow, spatially limited beam waist located at a selected distance above the skin surface, wherein said selected distance is between about 25μm and about 300 μm.
1 more element
A hair removal method comprising:
- a) manually positioning a handheld device containing a light source adjacent to a skin surface;
- b) detecting or determining a distance of said light source from the skin surface with a proximity sensor in said handheld device;
- and
- if said determined distance is within a specified range, activating said light source responsive to said detecting or determining a distance of said light source from the skin surface with a proximity sensor in said handheld device to generate a highly convergent beam of a frequency band significantly absorbed by hair and having a narrow, spatially limited beam waist located at a selected distance above the skin surface, wherein the light fluence at said beam waist is between about 4 and about 100 times the light fluence at said skin surface.
1 more element
A hair removal method comprising:
- a) manually positioning a handheld device containing a light source adjacent to a skin surface;
- b) detecting or determining a distance of a portion of said handheld device from the skin surface with a proximity sensor in said handheld device;
- and
- c) if said determined distance is within a specified range, activating said light source responsive to said detecting or determining a distance of said portion of said handheld device from the skin surface with a proximity sensor in said handheld device to generate a highly convergent beam of a frequency band significantly absorbed by hair and having a narrow, spatially limited beam waist located at a selected distance above the skin surface, wherein the light fluence at said beam waist is between about 4 and about 100 times the light fluence at said skin surface.
1 more element
A hair removal method comprising:
- a) manually positioning a handheld device containing a light source adjacent to a skin surface;
- b) detecting or determining a distance of a portion of said handheld device from the skin surface with a proximity sensor in said handheld device;
- and
- if said determined distance is within a specified range, activating said light source responsive to said detecting or determining a distance of said portion of said handheld device from the skin surface with a proximity sensor in said handheld device to generate a highly convergent beam of a frequency band significantly absorbed by hair and having a narrow, spatially limited beam waist located at a selected distance above the skin surface, wherein said selected distance is between about 25μm and about 300μm.
1 more element
Dependencies are inferred from the claim text.