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Light emitting device

A technology of light-emitting devices and light beams, used in measurement devices, material analysis by optical means, instruments, etc.

Inactive Publication Date: 2014-05-14
BRAUN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Laser hair removal has long been restricted to specialized salons and clinics due to the necessity of high powered light sources
[0004] However, there is a need for electromagnetic hair removal devices to be used at home by non-professionals as household appliances

Method used

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Embodiment Construction

[0024] In one aspect of the invention, the radiation source providing the electromagnetic radiation of the manipulation beam and the radiation source providing the electromagnetic radiation of the sensing beam may be the same emission source.

[0025] In an alternative aspect of the invention, the radiation source providing the operating beam and the radiation source providing the sensing beam may be independent of each other, ie at least two independent electromagnetic radiation emitting sources.

[0026] If the radiation source for manipulating the beam and the radiation source for sensing the beam are provided by a single source of electromagnetic radiation, the radiation source according to one aspect of the invention may include a beam splitter to split the radiation emitted from the actual emitter Divided into a sensing beam and an operating beam.

[0027] In another aspect of the invention, wherein the sensing beam and the manipulating beam are provided by a single sour...

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Abstract

The invention provides a light emitting device. The light emitting device is provided with at least one radiation source; at least one radiation source for electromagnetic radiation providing at least one sensing beam during operation of the device; at least one detector for detecting the sensing beam; at least one sensing window having a contact boundary surface, wherein the detector is arranged such that during operation of the device the sensing beam on a path from the radiation source providing the sensing beam to the detector is at least once reflected at the contact boundary surface of a sensing window by total internal reflection once the contact boundary surface of the sensing window is in contact with air; and a controller communicating with the radiation source providing the operating beam and with a detector and being operable to influence operation of the radiation source providing the operating beam responsive to the sensing beam detected at the detector.

Description

technical field [0001] The invention relates to the field of light emitting devices, and also to the field of household appliances, such as electromagnetic hair removal devices comprising light emitting devices. Background technique [0002] Laser hair removal or laser hair removal techniques are commonly used to remove hair from a person's skin or even prevent the growth of new hair. In certain wavelength regions of electromagnetic radiation, the electromagnetic absorption of the hair, in particular the hair root, is greater than the absorption of the surrounding skin. Thus, when the skin is treated with light in a selected wavelength range, the hair roots may be selectively heated to temperatures above 60° C., resulting in a loss of the hair roots' ability to grow new hairs. Thus, light treatment may allow for the control of hair growth on human skin. [0003] Laser hair removal has long been restricted to specialized salons and clinics due to the necessity of high-power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/20
CPCA61B18/203A61B2018/00476A61B2090/065G01N21/552G01N33/5005G01N33/543
Inventor S·K·曼德尔F·比尔沃思D·保加特斯凯C·尼亚
Owner BRAUN GMBH
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