WO2019144972A1

WO2019144972A1 - Laser shaving device

Info

Publication number: WO2019144972A1
Application number: PCT/CN2019/073737
Authority: WO
Inventors: 李明
Original assignee: 李明
Priority date: 2018-01-29
Filing date: 2019-01-29
Publication date: 2019-08-01
Also published as: CN207689764U

Abstract

A laser shaving device, comprising: a laser source (1), a laser shaping unit (2), and a shaving surface (3). The laser source, the laser shaping unit, and the shaving surface are provided in sequence. After the laser source is subjected to imaging by means of the laser shaping unit, linear laser light spots (7) are gathered above the shaving surface. Linear laser light spots are added to the laser shaving device on the basis of an original manual shaver. Beards (8) are cut off at intersections with the linear laser light spots. The sharpness requirement of a shaver blade is reduced, the service life of a shaver is prolonged, and the risk of cutting into skin when shaving is avoided.

Description

Laser shaving device

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 20182014625, the entire disclosure of which is incorporated herein by reference.

Technical field

The application relates to a laser shaving apparatus.

Background technique

At present, the shaving device on the market is mainly an electric razor and a manual blade razor. The electric razor is noisy and the blade is not clean; the manual blade razor needs a softener to assist the shaving. The risk of cuts, and the blade has a short life and needs to be replaced frequently.

The prior art discloses a hair shortening device which uses a laser source to form a plurality of focal points after shaping, directly irradiates onto the skin, forms a laser-induced optical destruction phenomenon in the hair tissue, achieves the purpose of shortening the hair, and can damage the skin hair follicle To achieve permanent hair removal, the laser power density threshold is on the order of 4 x 10 ¹¹ W/cm ² . The laser directly illuminates the human skin, and the laser power density exceeds 200 W/cm ^{2, which may} cause damage to the skin such as carbonization. Therefore, the device is not suitable for daily use as a razor.

Obviously, shaving can be performed with a laser of a certain power density, and the hair of Asians is mainly black, black hair has a strong ability to absorb light in a certain wavelength range, and a lower laser power can burn black hair. Adding a laser cutting device to the manual blade, using a laser with a certain power density to achieve the purpose of shaving, can reduce the sharpness of the blade, avoiding the blade cutting the skin, after the laser shaving, the edge of the hair is not neat, the available blade Finishing for a perfect shaving effect.

Summary of the invention

In order to solve the above problems, the present application discloses a laser shaving apparatus which adds a laser line type spot on the basis of the original manual razor, and is used as a "razor" to meet the intersection of the beard and the laser spot. The laser is cut off at the point, reducing the sharpness requirements of the razor blade, increasing the life of the razor and avoiding the risk of cutting the skin during shaving.

In order to achieve the above object, the present application adopts the following technical solutions:

The present application discloses a laser shaving apparatus comprising: a laser source, a laser shaping unit and a shaving surface; the laser source, the laser shaping unit and the shaving surface are sequentially disposed, and the laser source is imaged by the laser shaping unit Concentrate into a linear laser spot at a set position above the shaving surface.

Further, the laser source is one or more.

Further, the laser source may be an edge emitting semiconductor laser.

Further, the laser source may be a fiber-coupled output laser, and the output end of the fiber is on the order of micrometers.

Further, the laser shaping unit comprises: a cylindrical lens that images the laser light in a linear spot to a set position above the shaving surface.

Further, the laser source may be a vertical cavity surface emitting semiconductor laser.

Further, when the laser source is a vertical cavity surface emitting laser, the shaping unit comprises: an aspherical lens and an aspherical aspherical cylindrical lens arranged in sequence; the aspherical lens converges the laser into a reduced real image, the A spherical aberration aspherical cylindrical lens shapes the reduced real image into a linear laser spot and projects it over the shaving surface.

Further, the contact laser surface on the shaving surface is plated with a laser anti-reflection medium, and most of the laser light can be reflected back into the housing of the shaving apparatus.

Further, the shaving surface is detachable, and the portion of the shaving surface that contacts the laser is curved, which can effectively reflect the laser back into the housing.

Further, the shaving surface contacts the skin with a sharp edge, the beard is placed on the shaving surface, and the laser-cut beard section is trimmed.

The beneficial effects of the application:

This application is equivalent to the addition of a laser line spot on the basis of the original manual razor, and is used as a "razor" to reduce the sharpness requirement for the razor blade and increase the life of the razor. Avoids the risk of cutting the skin when shaving.

Compared to the electric shaver, there is no noise when used, and the cutter head is cleaned. The laser spot is formed above the shaving surface to avoid direct contact with the skin and no risk of burns to the skin.

The laser anti-reflection medium is plated on the shaving surface, and the laser light is reflected back into the shaving device casing to prevent the shaving surface from absorbing the laser and overheating and scalding the skin.

DRAWINGS

1 is a schematic structural view of a laser shaving apparatus of the present application;

2 is a schematic structural view of a plurality of laser light sources of the present application;

3 is a schematic structural view of a laser shaping unit according to an embodiment of the present application;

4 is a schematic structural view of a laser shaping unit according to Embodiment 2 of the present application;

Figure 5 is a schematic view of laser shaving of the present application;

6 is a schematic view of a laser anti-reflection medium for a shaving surface of the present application;

Among them, 1 laser source, 2 laser shaping unit, 3 shaving surface, 4 DC power supply, 5 housing, 6 laser anti-reflection medium, 7-line laser spot, 8 beard.

Detailed ways

The present application will be further described below in conjunction with the drawings and specific embodiments.

The present application discloses a laser shaving apparatus, as shown in FIG. 1, comprising: a laser source 1, a laser shaping unit 2 and a shaving surface 3; the laser source 1 is powered by an internal DC power source 4, and can also be powered by an external power source.

The laser source 1 can be singular or plural, preferably a semiconductor laser source 1. The laser shaping optical path unit 2 forms a linear spot of the laser light from the laser source 1 and projects it onto the shaving surface 3, and the shaving surface is opaque and maintains a certain distance from the skin to avoid damage to the skin. As shown in FIG. 6, the contact laser surface on the shaving surface is plated with the laser anti-reflection medium 6, so that the shaving surface acts as a laser mirror at the same time, and most of the laser light can be reflected back into the casing 5 to avoid the shaving surface. Absorbs the laser overheating and burns the skin.

As shown in Fig. 5, the shaving surface 3 is in contact with the sharp end of the skin, and the beard 8 can be placed on the shaving surface 3, and the beard 8 is cut after laser irradiation, and the sharp edge is trimmed and cut. Untidy beard 8 on the edge. The shaving surface 3 can be removed to meet the replacement requirements.

For Asian black hair, it is generally considered that the 800nm laser power reaches 100W/mm ² to achieve good shaving requirements. The laser power can be adjusted according to the shaving speed and hair color, and the laser wavelength.

The length of the linear laser spot 7 and the number of the laser light source 1 can be adjusted under the premise of ensuring the laser power.

The laser shaping path will vary depending on the laser source 1. The laser source 1 is preferably a semiconductor laser having a wavelength in the range of 700 nm to 2000 nm, preferably in the range of 800 nm to 1500 nm. There are many types of semiconductor lasers, and the side emitting semiconductor laser and the vertical cavity surface emitting semiconductor are divided into different laser emitting modes. Lasers, because the shape of the light-emitting surface of the two lasers and the laser exit angle are very different, the requirements for the laser-shaping optical path are also different.

Embodiment 1

In this embodiment, the laser source 1 uses four C-mount package side emitting semiconductor lasers, arranged in a line-like equidistant arrangement, as shown in FIG. The width of the light-emitting surface of the edge-emitting semiconductor laser is on the order of micrometers, and the light-emitting angle is inconsistent in the direction of the fast axis and the slow axis, and the phase difference is relatively large, and the emitted far-field spot is elliptical. The laser has a wavelength of 810 nm and a rated maximum laser power of 1 W. The laser shaping unit 2 uses a cylindrical lens. As shown in FIG. 3, the beam is concentrated and imaged along the fast axis of the laser, and the light emitting surface of the laser is imaged by a linear spot. Above the surface 3, the laser in the slow axis direction is not affected. The laser light from the four lasers is concentrated by the cylindrical lens and superimposed on the shaving surface 3 in the longitudinal direction to form a linear laser spot 7 having a length of 3 cm and a width of 100 μm, projected onto the shaving surface 3, and shaving the beard 8 jobs. The beard is cut at the intersection with the laser spot, and the laser-cut beard section is then trimmed with the sharp edges of the shaving surface. The shaving surface is detachable and easy to replace. The part contacting the laser is coated with a laser anti-reflection film, which can reflect the laser back into the casing to avoid overheating of the shaving surface and avoid laser radiation to the outside of the casing, thereby causing laser eye safety problems. Preferably, the portion of the shaving surface that contacts the laser is curved to effectively reflect the laser back into the housing.

Embodiment 2

In this embodiment, the laser source 1 uses a three-plane emitting semiconductor laser with a light emitting surface size of about 1 mm*0.6 mm, a laser wavelength of 808 nm, and a rated maximum laser power of 2 W; the laser shaping unit 2 employs an aspherical positive lens and an aspheric cylindrical lens. As shown in FIG. 4, the aspherical positive lens forms a reduced image of the laser source, reduces the laser light emitting surface, and then converges in a single direction by an aspherical cylindrical lens, and converges into an image of the same size in the width direction, and the length direction The upper part of the three sides of the laser spot is 3 cm and the width is 200 μm.

After the shaving face 3 stands up, the shaving work of the beard 8 is performed by a line laser. The beard is cut at the intersection with the laser spot, and the laser-cut beard section is then trimmed with the sharp edges of the shaving surface. The portion of the shaving surface that contacts the laser is plated with a laser anti-reflection medium that reflects most of the laser light back into the housing to prevent overheating of the shaving surface.

Preferably, the portion of the shaving surface that contacts the laser is curved to effectively reflect the laser light back into the housing.

Embodiment 3

In this embodiment, the laser source 1 adopts a fiber-coupled output mode, the output end face of the optical fiber is 200 μm, and the laser power is 2 W. The laser shaping unit 2 uses a cylindrical lens to image the laser spot outputted from the output surface of the optical fiber above the shaving surface 3. A linear spot having a spot width of 200 μm and a spot length of 1 cm. The laser part of the shaving surface contact is coated with a laser anti-reflection film, which can effectively reflect the laser back into the casing.

The above description of the specific embodiments of the present application is described in conjunction with the accompanying drawings, but is not intended to limit the scope of the application, and those skilled in the art should understand that those skilled in the art do not need to work creatively on the basis of the technical solutions of the present application. Various modifications or variations that can be made are still within the scope of the present application.

Claims

A laser shaving apparatus, comprising: a laser source, a laser shaping unit, and a shaving surface; the laser source, the laser shaping unit and the shaving surface are sequentially disposed, and the laser source passes through After imaging, the laser shaping unit converges into a linear laser spot at a set position above the shaving surface.
A laser shaving apparatus according to claim 1, wherein said laser source is one or more.
A laser shaving apparatus according to claim 1, wherein said laser source is an edge emitting semiconductor laser.
A laser shaving apparatus according to claim 1, wherein said laser source is coupled by means of a fiber, and the output end of the fiber is on the order of micrometers.
A laser shaving apparatus according to claim 3 or 4, wherein said laser shaping unit comprises: a cylindrical lens that images laser light in a linear spot above said shaving surface Set the location.
A laser shaving apparatus according to claim 1, wherein said laser source is a vertical cavity surface emitting semiconductor laser.
A laser shaving apparatus according to claim 6, wherein said laser shaping unit comprises: an aspherical lens and an aspherical aspherical cylindrical lens arranged in sequence; said aspherical lens condensing laser light into a reduction The real image, the aspherical aspherical cylindrical lens shapes the reduced real image into a linear laser spot, projected onto the shaving surface.
A laser shaving apparatus according to claim 1, wherein said laser portion of said shaving surface is plated with a laser anti-reflection medium.
A laser shaving apparatus according to claim 1, wherein said shaving surface contacts a sharp edge at one end of the skin for trimming the beard end face after laser shaving.
A laser shaving apparatus according to claim 1, wherein the portion of the shaving surface that contacts the laser is curved.