A hair-detection device

A technology for detecting equipment and hair, which can be used in hairdressing equipment, permed hair roots, diagnostic recording/measurement, etc., and can solve problems such as difficult detection of hair
CN1946335AInactive Publication Date: 2007-04-11KONINKLIJKE PHILIPS ELECTRONICS NV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KONINKLIJKE PHILIPS ELECTRONICS NV
Publication Date
2007-04-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a hair-detection device (100), with a source (80) of electromagnetic radiation and an imaging sensor (74), and with radiation selection means (83, 48). During use of the device, the selection means improve a ratio between the part of the emitted radiation that is coupled into a skin (8), homogenized via multiple scattering without much absorption in the skin, reaches the sensor (74) and thus provides an image of the skin, and the part that reaches the sensor via other ways, such as reflection at the skin surface. The radiation preferably has a wavelength between about 700 nm and 1100 nm. The radiation selection means may e.g. comprise a separate wall (83) around at least one of the source (80) and the sensor (74) and the sensor (74), crossed polarizers, etc. By means of this selection, the contrast of the image may be improved, and may be made less dependent on skin color and skin artifacts, thus enabling easier detection of e.g. white hairs on a fair skin. A hair-detection in accordance with the invention is used in a hair-removing device.
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Description

technical field

[0001] The invention relates to a hair detection device comprising a source of electromagnetic radiation and an imaging sensor for determining an image of a portion of skin irradiated by said radiation, the imaging sensor being sensitive to at least a predetermined wavelength range of said electromagnetic radiation. Background technique

[0002] From WO 00 / 62700 a hair detection device of the kind mentioned in the opening paragraph is disclosed for use in a hair removal device comprising irradiating means for irradiating a part of the skin, an image sensor and for processing the image to detect A control unit for the position and / or orientation of the hairs on the skin part.

[0003] A disadvantage of this known hair detection device is that it is difficult to detect hair in certain situations, especially low-contrast situations, such as white or light-colored hair on light-colored skin, or dark-colored hair on dark skin. hair. Contents of the invention ...

Claims

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