MARIUS IOSIF BOAMFA,KIRAN KUMAR THUMMA,BASTIAAN WILHELMUS MARIA MOESKOPS,MARK THOMAS JOHNSON,RIEKO VERHAGEN
申请号：
US16468325
公开号：
US20200069370A1
申请日:
2017.12.08
申请国别(地区):
US
年份:
2020
代理人:
摘要：
There is provided a hair cutting device a hair cutting device for cutting hair on a subject, the hair cutting device comprising a light source for generating light at one or more specific wavelengths corresponding to wavelengths absorbed by one or more chromophores in or on hair； a cutting element that comprises an optical waveguide that is coupled at a first end to the light source to receive light, wherein a portion of a sidewall of the optical 5 waveguide forms a cutting face for contacting hair； and a control unit that is coupled to the light source, wherein the control unit is configured to vary the power of the light generated by the light source between first and second power levels during operation such that, on heating of a hair by light coupling from a contact point on the cutting face into the hair, the temperature of the contact point on the cutting face is maintained below a glass transition 10 temperature for the optical waveguide, wherein the first power level is higher than the second power level.
