Method and system for temporary hair removal
First Claim
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1. A depilation method comprising:
- a) detecting or determining proximity of a depilation device to a skin surface;
b) responsive to detecting or determining proximity of a depilation device to a skin surface, delivering a beam of highly convergent light from said depilation device to the skin surface, said beam of light having a beam waist positioned substantially at a base of at least one hair shaft;
c) delivering said light for a duration and with an intensity sufficient to cause mechanical failure of the at least one hair shaft at said beam waist; and
d) delivering a beam of light having a diameter at the skin surface that is between about 2 and about 10 times the diameter of said beam at said beam waist.
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Accused Products
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.
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Citations
15 Claims
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1. A depilation method comprising:
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a) detecting or determining proximity of a depilation device to a skin surface; b) responsive to detecting or determining proximity of a depilation device to a skin surface, delivering a beam of highly convergent light from said depilation device to the skin surface, said beam of light having a beam waist positioned substantially at a base of at least one hair shaft; c) delivering said light for a duration and with an intensity sufficient to cause mechanical failure of the at least one hair shaft at said beam waist; and d) delivering a beam of light having a diameter at the skin surface that is between about 2 and about 10 times the diameter of said beam at said beam waist. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13, 14)
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8. A depilation device comprising:
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a) a light source capable of producing light of a wavelength band significantly absorbed by hair; b) a lens positioned to receive light from the light source and configured to form from the received light a highly convergent beam having a narrow, spatially limited beam waist; c) a proximity sensor capable of detecting the proximity of said light source to a skin surface and generating a proximity sense signal indicative of said proximity; and d) control circuitry configured to gate said light in response to said proximity sense signal, wherein said control circuitry is configured to permit generation of said highly convergent beam such that said narrow spatially limited beam waist is positioned within a distance-range of about 40 μ
m and about 300 μ
m above the skin surface. - View Dependent Claims (9, 10, 11, 12, 15)
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Specification