EP1928339A1 - Apparatus for shaving a person's hair by means of laser radiation - Google Patents

Apparatus for shaving a person's hair by means of laser radiation

Info

Publication number
EP1928339A1
EP1928339A1 EP05787833A EP05787833A EP1928339A1 EP 1928339 A1 EP1928339 A1 EP 1928339A1 EP 05787833 A EP05787833 A EP 05787833A EP 05787833 A EP05787833 A EP 05787833A EP 1928339 A1 EP1928339 A1 EP 1928339A1
Authority
EP
European Patent Office
Prior art keywords
characterized
device according
optical fibers
laser
portable unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05787833A
Other languages
German (de)
French (fr)
Inventor
Jens Meinschien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LIMO Patentverwaltung GmbH and Co KG
Original Assignee
LIMO Patentverwaltung GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LIMO Patentverwaltung GmbH and Co KG filed Critical LIMO Patentverwaltung GmbH and Co KG
Priority to PCT/EP2005/010079 priority Critical patent/WO2007033687A1/en
Publication of EP1928339A1 publication Critical patent/EP1928339A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/203Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser applying laser energy to the outside of the body
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/0604Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
    • B23K26/0608Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams in the same heat affected zone [HAZ]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/073Shaping the laser spot
    • B23K26/0738Shaping the laser spot into a linear shape
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00452Skin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00452Skin
    • A61B2018/00476Hair follicles
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/22Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B2018/2205Characteristics of fibres
    • A61B2018/2211Plurality of fibres

Abstract

Apparatus for shaving a person’s hair by means of laser radiation (4), comprising a base unit (1) having at least one laser light source, a portable unit (2) which a user can move to the region of the hair to be cut, and also transmission means having a plurality of optical fibres (7) which can transmit the laser radiation emitted by the at least one laser light source from the base unit (1) to the portable unit (2), with the ends of the optical fibres (7) being arranged in the portable unit (2) in such a way that the laser radiation (4) emitted from these ends can at least partially overlap and has a linear beam cross section in the overlapped state.

Description

"A device for shaving hair of a person by means of

Laser Radiation "

The present invention relates to a device for shaving hair of a human according to the preamble of claim 1 and an application of this device.

An apparatus of the aforementioned type is known from international patent application WO 93/05920 A1. The device described therein may comprise a base station and a portable hand piece which the user can result in the work area are in shave the hair. The base station and the handpiece may be interconnected via a cable, which comprises an optical fiber. In the base station a laser light source is housed, the light passes through a series of lenses passes before it enters the optical fiber. After emerging from the optical fiber within the handpiece, the laser radiation also occurs by a plurality of lenses, especially cylindrical lenses therethrough so that the laser radiation can emerge with a line-shaped cross-section from the handpiece to the shaving human hair.

A disadvantage of such an apparatus, the complexity of the optical setup, which entails high manufacturing costs turns.

The problem of the present invention is based is to provide a device of the type mentioned, which is less expensive to manufacture.

This is inventively achieved by a device of the aforementioned type with the characterizing features of claim 1. The subclaims relate to preferred embodiments of the invention.

Whose ends are located in the portable unit in such a manner, by providing a plurality of optical fibers for transmitting the laser radiation, that the emerging from these ends, the laser radiation may overlap at least partially and having an elongated beam cross section in the overlapped state can by simple means Shaving suitable beam cross section can be obtained. There is in particular the possibility of suitable for shaving, elongated beam cross section without additional optics such as lenses or with significantly less or more cost-effective optical means to achieve. In an embodiment without lenses or the like in front of the exit ends of the optical fibers can also be dispensed with high precision and thus expensive mechanical supports. Furthermore, the complex adjustment of such lenses and brackets omitted when manufacturing the device. A further advantage results from the fact that even with defects in the individual light waveguides, the device can continue to be used because the laser radiation further is transmitted through the other optical waveguide.

In particular, the ends of the optical fibers may be arranged to in the portable unit essentially in a row next to each other, thus resulting in a substantially line-shaped beam cross-section in the overlapped state of the laser radiation. Thus, this arrangement of the plurality of optical fibers allows the creation of a line-shaped beam cross-section without additional cylindrical lenses or the like. This arrangement of optical fibers can passively during manufacture of the device, that is to be created without laser operation, so that the manufacturing cost can be further reduced.

There is the possibility that the device comprises a plurality of laser light sources, which are preferably formed as a single laser diode or as individual emitters of a laser diode bar. In particular, each of the laser light sources can in this case be associated with exactly one optical fiber. Individual laser diodes have opposite laser diode bars have the advantage that they have a longer service life and can be operated at higher Temperaturßn, so that less stringent requirements must be imposed on the cooling. Furthermore, an independent operation of the individual laser diodes can be selected, so that the failure of a single laser diode does not lead to defects of other laser diode and the device can still be used. This can be ensured, for example by a series circuit of the laser diode with failover such as low-bypass in case of failure of a diode. Furthermore, the use of many identical or equivalent components, such as the use of several identical laser diodes and a plurality of same) "optical fibers due to mass production to reduce costs contributes.

An advantageous embodiment may result in that in each case an optical fiber may be arranged in front of one of the laser light sources, that the light emerging from the laser light source laser light directly enters the optical fiber, in particular without a prior passage through optical means such as lenses or the like. Thus, to dispense with the input side of the optical fibers to lenses, so that the costs can be further reduced. At most, a fast-axis collimating lens could be arranged to collimate the laser radiation largely with respect to the large divergence in the so-called fast axis between a laser diode or a laser diode bar and the optical fiber or optical fibers.

There is a possibility that the transmission means comprise a flexible cable in which the optical fibers are tightly packed. This results in a particularly dense and compact package when the number of optical fibers is 7 or 19 or 37 apply.

There is also the possibility that the flexible cable comprises an electrical signal line and / or at least one optical waveguide for guiding visible pilot radiation. By means of the electrical signal line, the laser light source may for example be switched. The pilot radiation from a light emitting diode or laser diode, the visible light for the generation is adapted to go out and be supplied through an additional optical fiber of the portable unit. For example, in case that the laser radiation emerges from the portable unit in a work area for shaving hair, the pilot radiation may facilitate the user with the guidance of the laser radiation.

It is possible to use an inventive apparatus for disinfecting or for plastic processing. In this case, of course, the output power of at least one laser light source must be adapted to the application. It is found, however, that a welding, cutting or modification of plastic is enabled by the signals generated by the corresponding arrangement of the optical fibers linear beam cross section. Other features and advantages of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. therein

Fig. 1 is a schematic perspective view of a device according to the invention;

Fig. 2 shows schematically the structure of an embodiment of a base unit of a device according to the invention;

Fig. 3 shows a cross section through an embodiment of a

Mounting the optical fibers in the portable unit of an inventive device;

FIG. 4a is a cross section through an embodiment of a bundle of optical fibers 7 of a device according to the invention;

FIG. 4b is a cross section through an embodiment of a bundle of 19 optical fibers of a device according to the invention;

Fig. 4c shows a cross section through an exemplary embodiment of a bundle of 37 optical fibers of a device according to the invention;

FIG. 5a is a two-dimensional intensity distribution of the outgoing of an inventive apparatus the laser radiation in an application layer;

FIG. 5b is a one-dimensional representation of the intensity distribution shown in Fig. 5a; Fig. 5c, a further one-dimensional representation of the intensity distribution of Fig. 5a;

As shown in Fig. 1 is seen an apparatus according to the invention comprises a base unit 1, a portable unit 2, and a connecting these to one another flexible cable 3. The portable unit 2 may have on one side a slot-shaped opening through which laser radiation 4 from the portable can emerge unit.

From Fig. 2 shows details of an exemplary embodiment of a base unit 1 are schematically shown. This base unit 1 comprises a cooling body 5, on which a plurality of laser diodes is mounted. 6 By arranging the laser diode 6 to a common heat sink 5, the heat generated from the individual laser diodes 6 is distributed comparatively uniformly, so that the thermal load of the laser diode 6 is small due to small temperature gradients.

For example, about 10 to 30 laser diodes 6, preferably about 19 laser diodes can be provided. 6 The laser diode 6 may each have at an emission wavelength between 800 nm and 1000 nm, an optical power of about 3 W to 8 W.

Instead of a plurality of laser diode 6, a laser diode bar with a plurality may be provided by emission sources in an alternative embodiment. It is also possible to provide a plurality of laser diode bars.

Prior to each of the laser diodes 6, an optical fiber 7 is positioned in the light emanating from the corresponding diode laser light may enter 6. In this case, in the illustrated embodiment, no optical means such as lenses or the like between the laser diode 6, and the entrance end of the optical fiber 7 are disposed. At an appropriate distance and appropriate positioning can still be guaranteed that a large part of light emerging from the laser diode light coupled into the optical fiber. 7 The optical fibers 7 may have a core diameter of 100 microns and a numerical aperture of 0.22, respectively. The optical fibers 7 may be coated with metal to make them more flexible and increase the fracture resistance compared to uncoated optical fibers.

It can also be provided between the laser diode 6 and of the corresponding optical fiber 7, a lens, such as a fast axis collimating lens, the divergence of light emerging from the laser diode 6 laser light with respect to the direction perpendicular to the active layer before entering the optical fiber 7 at least collimate partially.

The base unit 1 5 may comprise a power supply with a power supply for the laser diode and an electronic control system in addition to the shown laser diodes 6 and the heat sink. The individual laser diode 6 may be connected in series, in particular means for low-impedance bridging of a failed laser diode 6 may be provided to ensure smooth operation of the device in case of failure of individual laser diodes. In this series connection of the individual laser diodes 6 much lower currents occur than with laser diode bars. Characterized electric lines with smaller cross-sections and simpler electronic circuits can be used.

Furthermore, in the base unit 1, the cooling power can be housed for the laser diodes 6 which is designed in particular as air cooling or cooling by Peltier elements. Emanating from the individual laser diodes 6 optical fibers 7 are combined into a bundle and are part of the flexible cable 3 which connects the base unit 1 to the portable unit. 2 In the cable 3 electrical signal lines, for example for control of the laser diode circuit, or may be further added. 6 In addition, the cable 3 may include one or more optical fibers for guiding visible pilot radiation. These pilot radiation can emanate from an opening provided in the base unit laser diode or light emitting diode which emits light in the visible region of the spectrum. The pilot radiation can inform the user what course takes the laser beam after exiting from the portable unit. 2

From Fig. 3 shows a detail of an embodiment of a portable unit 2 can be seen. In particular, this embodiment includes a retaining member 8 with a plurality of V-shaped grooves 9. In each of these grooves 9 one of the optical fibers 7 is arranged. The optical fibers 7 are held in the grooves 9 by a plate 10 which rests on the side remote from the grooves 9 side of the optical fibers 7 and to this example, is connected to the holding part. 8 The portable unit 2 may include a transparent to the laser radiation 4 protective window that can protect the ends of the optical fibers 7 from external influences. In particular, the portable unit 2 and the like can be hermetically sealed against moisture.

The distance between the lower ends of the grooves 9 to each other may be between 0.5 mm and 5 mm, in particular about 1 mm. The distance between the axes of the optical fibers 7 with each other may also be about 1 mm so. The light emerging from the individual optical fibers 7 laser light already overlapped with each other just beyond the end of the optical fibers. 7 In Fig. 5a the intensity distribution of the overlapped laser radiation is shown in a distance of 3 mm behind the end of the optical fibers 7 two-dimensionally. Correspond to darker region of higher intensity than lighter areas.

In Fig. 5b and Fig. 5c, the intensities of the laser beam are each applied to a spatial coordinate X or Y, the directions X and Y perpendicular to each other. Fig. 5b clearly shows that the intensity differences between the darker points in Fig. 5a, which can be associated with the cores of individual optical fibers 7, and the lighter transition or overlap regions are available but not very pronounced. Thereby it can be ensured in a working distance of 2 mm from the exit location of the laser radiation from the portable unit 2 sufficient for shaving human hair homogeneity of the line-like overlapped laser radiation.

The mechanical tolerance requirements on the holding member 8 are very small, since is not greatly influenced by a slight change in the distance of the optical fibers 7 with each other, the intensity distribution of the overlapped laser radiation. Accordingly, the portable unit 2 is largely insensitive due to the large mechanical tolerances of the holding member 8 for external mechanical or thermal influences. This robustness of the portable unit 2 is reinforced by the protective window and the hermetic seal of the portable unit. 2

In Fig. 4a, the exemplary arrangement of optical fibers 7 7 in Fig. 4b, the exemplary arrangement of the optical fibers 7 and 19 in Fig. 4c, the exemplary arrangement of optical fibers 37 in a bundle 7 of optical fibers is illustrated. The numbers of optical fibers 7 referred to respectively enable a very compact arrangement of the optical fibers 7 in the bundle.

Claims

claims:
, A device for shaving hair of a person by means of laser radiation (4), comprising
- a base unit (1) with at least one laser light source;
- a portable unit (2), which can be brought by a user in the area to be cut off the hair;
- transfer means having at least one optical fiber (7), which can transmit the radiation emanating from the at least one laser light source laser radiation from the Basiseihheit (1) to the portable unit (2);
characterized, in that
- the transmission means comprise a plurality of optical fibers (7) for transmitting the laser radiation, wherein the ends of the optical fibers (7) in the portable unit (2) are arranged such that the can overlap emerging from these ends, at least partially, and in the overlapped state a having elongated beam cross section.
2. Device according to claim 1, characterized in that the beam cross section of the laser radiation (4) in the overlapped state is substantially linear.
3. A device according to any one of claims 1 or 2, characterized in that the ends of the optical fibers (7) in the portable unit (2) are arranged substantially in a row next to each other.
4. Device according to one of claims 1 to 3, characterized in that the device comprises a plurality of laser light sources, preferably as a single laser diode (6) or are formed as a single emitter of a laser diode bar.
5. The device according to claim 4, characterized in that each of the laser light sources exactly one optical fiber is associated with (7).
6. Device according to one of claims 1 to 5, characterized in that the optical fibers (7) comprises a laser light source are arranged in front of at least that which passes laser light emerging directly into the optical fibers (7) of the at least one laser light source, in particular without prior passing through optical means such as lenses or the like.
7. Device according to one of claims 1 to 6, characterized in that the portable unit (2) is designed such that from the optical fibers (7) emerging laser radiation (4) passes directly into the serving shaving work area, in particular without prior passing through optical means such as lenses or the like.
8. Device according to one of claims 1 to 7, characterized in that the transmission means comprise a flexible cable (3), in which the optical fibers (7) are closely packed.
9. Device according to one of claims 1 to 8, characterized in that the transmission means comprise 7 or 19 or 37 optical fibers (7).
10. The device according to one of claims 1 to 9, characterized in that the flexible cable (3) comprises an electrical signal line and / or at least one optical fiber for guiding visible pilot radiation.
1. 1 Device according to one of claims 1 to 10, characterized in that the device is designed in such a way that the laser radiation (4) from the portable unit (2) emerge and can shave outside of the portable unit (2) hair.
12. Device according to one of claims 1 to 11, characterized in that the device is designed in such a manner that hair partially in the portable unit (2) and penetrate within the portable unit (2) can be shaved.
13. Application of a device according to any one of claims 1 to 12, characterized in that the device is used for disinfecting or for plastic processing.
EP05787833A 2005-09-19 2005-09-19 Apparatus for shaving a person's hair by means of laser radiation Withdrawn EP1928339A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/010079 WO2007033687A1 (en) 2005-09-19 2005-09-19 Apparatus for shaving a person’s hair by means of laser radiation

Publications (1)

Publication Number Publication Date
EP1928339A1 true EP1928339A1 (en) 2008-06-11

Family

ID=35999483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05787833A Withdrawn EP1928339A1 (en) 2005-09-19 2005-09-19 Apparatus for shaving a person's hair by means of laser radiation

Country Status (5)

Country Link
US (1) US20080201954A1 (en)
EP (1) EP1928339A1 (en)
JP (1) JP2009508689A (en)
CN (1) CN101321502A (en)
WO (1) WO2007033687A1 (en)

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US8858229B2 (en) 2007-08-27 2014-10-14 Morgan Gustavsson Volume emitter
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WO2013093772A1 (en) * 2011-12-22 2013-06-27 Koninklijke Philips Electronics N.V. Hair cutting device
EP2656982A1 (en) * 2012-04-27 2013-10-30 Koninklijke Philips N.V. Device for cutting hair
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US9017322B2 (en) * 2013-03-15 2015-04-28 Morgan Lars Ake Gustavsson Laser shaving
US10105182B2 (en) 2013-03-15 2018-10-23 Skarp Technologies (Delaware) Inc. Laser shaving
US20160121426A1 (en) * 2014-11-05 2016-05-05 Franz HOLLINGER Laser fiber array for singulating semiconductor wafers

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Also Published As

Publication number Publication date
WO2007033687A1 (en) 2007-03-29
US20080201954A1 (en) 2008-08-28
CN101321502A (en) 2008-12-10
JP2009508689A (en) 2009-03-05

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