Abstract: A hand held personal care device 1 has a main housing 2 arranged to be held by hand, and an operative unit 3 connected to the main FIG. 1 housing 2 and adapted for carrying out a personal care operation to a body part of a user. The main housing 2 has a main axis of extension 36 and accommodates a light indicator 4 for indicating an operational condition of the personal care device 1. The light indicator 4 has a light emitting surface 6, that extends circumferentially around the main housing 2 as a closed-loop surface about the main axis of extension 36, and a light guiding wall 31 of which at least a portion, including the closed-loop surface, extends as a closed-loop wall portion 40 about the main axis of extension.

Abstract: A hand held personal care device (1) with an operative unit (3) connected to a main housing (2), a light source (24), and an optically transparent light guide (23) having a light receiving surface (27), a light emitting surface (6) and a light guiding member (31) extending from the light receiving surface to the light emitting surface for guiding light from the light receiving surface to the light emitting surface. The light source is arranged in a watertight chamber (51) of the main housing. The main housing includes an optically transparent wall portion (52) arranged adjacent to the light source and bounding the watertight chamber. The light guide is arranged outside the watertight chamber and the light receiving surface is arranged adjacent to the optically transparent wall portion in a position for receiving light from the light source via the optically transparent wall portion.

Abstract: The invention provides a system (1) comprising a sensor (100) for measuring a skin parameter, the sensor (100) comprising (i) a plurality of spatially separated light sources (110) configured to provide light source light (111), and (ii) a detector (120) configured at a first distance (d1) from each of the light sources (110), wherein the first distance (d1) is selected from the range of 5-80 mm, wherein the sensor (100) is configured to provide the light source light (111) with optical axes (OL) under an angle (?) relative to an optical axis (O2) of the detector (120) selected from the range of 10-80°, wherein the sensor (100) comprises at least three light sources (110), wherein the light sources (110) are configured to provide unpolarized light source light (111), wherein the sensor (100) further comprises (iii) a sensor opening (107) downstream of the light sources (110) and upstream of the detector (120) for propagation of the light source light (111) out of the sensor (100) and for entrance of reflected

Abstract: In an embodiment, a method of manufacturing (100) is described. The method comprises providing (102) a first layer defining a first inner surface (203a) and a first outer surface (203b), a second layer defining a second inner surface (205a) and a second outer surface (205b), and an electrical component (206) positioned on the first inner surface or the second inner surface. The method further comprises attaching (104) the first and second layers together to create a device (200) comprising the first and second layers, wherein the first outer surface and the second outer surface define an external surface of the device. The device further comprises a sealed portion (208) defined by liquid-tight attachment between the first and second inner surfaces. In use of the device, the sealed portion prevents liquid ingress into the device between the first and second layers towards the electrical component.

Abstract: The invention relates to an oral care device for teeth whitening or other purpose. The device is designed to provide a uniform light intensity distribution at the teeth. This is achieved by use of a light guide which at some surface parts is separated from surrounding parts of the mouthpiece of the oral care device by air-filled separation portions. The light guide mixes the injected light to improve the uniformity of the light intensity. In 5 order to couple light out from the light guide, the mouthpiece comprises an out-coupling structure located opposite to the buccal side of the teeth. The out-coupling structure may be shaped, e.g. by changing the area or density of parts of the out-coupling structure depending on the distance to a location of the light guide where light is injected.

Abstract: A hand held personal care device (1) with an operative unit (3) connected to a main housing (2), a light source (24), and an optically transparent light guide (23) having a light receiving surface (27), a light emitting surface (6) and a light guiding member (31) extending from the light receiving surface to the light emitting surface for guiding light from the light receiving surface to the light emitting surface. The light source is arranged in a watertight chamber (51) of the main housing. The main housing includes an optically transparent wall portion (52) arranged adjacent to the light source and bounding the watertight chamber. The light guide is arranged outside the watertight chamber and the light receiving surface is arranged adjacent to the optically transparent wall portion in a position for receiving light from the light source via the optically transparent wall portion.

Abstract: A hand held personal care device 1 has a main housing 2 arranged to be held by hand, and an operative unit 3 connected to the main FIG. 1 housing 2 and adapted for carrying out a personal care operation to a body part of a user. The main housing 2 has a main axis of extension 36 and accommodates a light indicator 4 for indicating an operational condition of the personal care device 1. The light indicator 4 has a light emitting surface 6, that extends circumferentially around the main housing 2 as a closed-loop surface about the main axis of extension 36, and a light guiding wall 31 of which at least a portion, including the closed-loop surface, extends as a closed-loop wall portion 40 about the main axis of extension.

Abstract: A laser arrangement includes a laser array, and an optical arrangement. The laser array includes lasers in a first pattern emitting a same laser emission profile around a first optical axis with a divergence angle ?/2. The optical arrangement has a diffusor with an array of optical elements in a second pattern, with a second optical axis, and with an illumination pattern along a first illumination axis in a field-of-view if laser light is received within a defined range smaller than or equal to a range of angles between ?/+? with respect to the second optical axis. A row of lasers parallel to the first illumination axis has a pitch p. A row of m optical elements is parallel to the first axis. Each optical element has a diameter L, and contacts its neighbor. The n lasers and the m optical elements satisfy n*p=m*L with a deviation smaller than +/?5%.

Abstract: There is provided a light guiding unit (10) for use in an oral cleaning device. The light guiding unit is configured to be coupled to a light source (50), and the light guiding unit comprises a homogenizing component (110) having a length along which light from the light source is guided. The homogenizing component is further configured such that at least one of an amount of refraction of the guided light and an amount of internal reflection of the guided light varies along the length to homogenize, along the length of the homogenizing component, an amount of light transmitting out of the homogenizing component.

Abstract: A laser arrangement includes a laser array, and an optical arrangement. The laser array includes lasers in a first pattern emitting a same laser emission profile around a first optical axis with a divergence angle ?/2. The optical arrangement has a diffusor with an array of optical elements in a second pattern, with a second optical axis, and with an illumination pattern along a first illumination axis in a field-of-view if laser light is received within a defined range smaller than or equal to a range of angles between ?/+? with respect to the second optical axis. A row of lasers parallel to the first illumination axis has a pitch p. A row of m optical elements is parallel to the first axis. Each optical element has a diameter L, and contacts its neighbor. The n lasers and the m optical elements satisfy n*p=m*L with a deviation smaller than +/?5%.

Abstract: There is proposed a light source comprising: a semiconductor diode structure adapted to generate light; and an optical enhancement section above the semiconductor diode structure and adapted to output light from the semiconductor diode structure. A partially-reflective layer covers at least a portion of the top of the optical enhancement section and is adapted to reflect a portion of the output light towards the optical enhancement section. The partially-reflective layer has a light transmittance characteristic that varies laterally.

Abstract: A VCSEL array has VCSELs on a semiconductor substrate and has a prismatic or Fresnel optical structure, which is arranged to transform laser light to provide a continuous illumination pattern in a reference plane. The optical structure increases a size of the illumination pattern in comparison to an untransformed illumination pattern. The optical structure is arranged such that each VCSEL illuminates a sector of the pattern. Sub-surfaces of the optical structure with different height above the semiconductor substrate are arranged next to each other. Each VCSEL is associated with a sub-surface. A distance between each VCSEL and a size of its sub-surface is arranged such that the VCSEL illuminates only a part of the sub-surface without illuminating one of the steps. The VCSEL array has an array of microlenses, each VCSEL being associated with a microlens arranged to collimate the laser light after traversing the optical structure.

Abstract: There is provided a light guiding unit (10) for use in an oral cleaning device. The light guiding unit is configured to be coupled to a light source (50), and the light guiding unit comprises a homogenizing component (110) having a length along which light from the light source is guided. The homogenizing component is further configured such that at least one of an amount of refraction of the guided light and an amount of internal reflection of the guided light varies along the length to homogenize, along the length of the homogenizing component, an amount of light transmitting out of the homogenizing component.

Abstract: The invention provides a system (1) comprising a sensor (100) for measuring a skin parameter, the sensor (100) comprising (i) a plurality of spatially separated light sources (110) configured to provide light source light (111), and (ii) a detector (120) configured at a first distance (d1) from each of the light sources (110), wherein the first distance (d1) is selected from the range of 5-80 mm, wherein the sensor (100) is configured to provide the light source light (111) with optical axes (OL) under an angle (?) relative to an optical axis (O2) of the detector (120) selected from the range of 10-80°, wherein the sensor (100) comprises at least three light sources (110), wherein the light sources (110) are configured to provide unpolarized light source light (111), wherein the sensor (100) further comprises (iii) a sensor opening (107) downstream of the light sources (110) and upstream of the detector (120) for propagation of the light source light (111) out of the sensor (100) and for entrance of reflected

Abstract: The invention relates to a mouthpiece (100) for illumination of teeth, e.g. for teeth whitening. The mouthpiece comprises a slab shaped light guide (203), at least one light source arranged for injecting light into the light guide and an optically transparent element (101) arranged to contact the light guide. The optically transparent element has a lower refractive index than the light guide to enable total internal refection of the injected light. Light is coupled out of the light guide by an out-coupling structure (210) and through a part of the optically transparent part located between the light guide and the buccal side of the teeth to illuminated the teeth with uniform light.

Abstract: The invention relates to a mouthpiece (100) for illumination of teeth, e.g. for teeth whitening. The mouthpiece is configured with at least two lenses (102a, 102b) shaped to cast asymmetrical light onto the teeth (110). The lenses are arranged one-to-one with associated light sources (101a, 101b). The first and second lenses are arranged to project the received light onto a buccal side (111) of the teeth (110), and each of the first and second lenses has an asymmetrically shaped refraction surface (301) shaped to change an intensity distribution of the received light asymmetrically on opposite sides of an optical axis (121) of the respective light source along the dental arch (201) of the teeth.

Abstract: A VCSEL array has VCSELs on a semiconductor substrate and has a prismatic or Fresnel optical structure, which is arranged to transform laser light to provide a continuous illumination pattern in a reference plane. The optical structure increases a size of the illumination pattern in comparison to an untransformed illumination pattern. The optical structure is arranged such that each VCSEL illuminates a sector of the pattern. Sub-surfaces of the optical structure with different height above the semiconductor substrate are arranged next to each other. Each VCSEL is associated with a sub-surface. A distance between each VCSEL and a size of its sub-surface is arranged such that the VCSEL illuminates only a part of the sub-surface without illuminating one of the steps. The VCSEL array has an array of microlenses, each VCSEL being associated with a microlens arranged to collimate the laser light after traversing the optical structure.

Abstract: The invention relates to an oral care device for teeth whitening or other purpose. The device is designed to provide a uniform light intensity distribution at the teeth by use of a light mixing chamber of a mouthpiece comprised by the oral care device. The mouthpiece comprises a sealing structure with rims designed to connect to the gums of a user. At least apart of the rim and a closure of the mouthpiece surrounded by the rim are reflective. When light is emitted into the mouthpiece, the light will be reflected by the reflective rim, the reflective closure and the buccal side of the teeth. Accordingly, the light will be reflected multiple times, which makes the intensity distribution more uniform. Additionally, the mouthpiece may comprise light redirection structures arranged to redirect light rays from light injected into the mouthpiece.

Abstract: The invention relates to a mouthpiece (100) for illumination of teeth, e.g. for teeth whitening. The mouthpiece is configured with at least two lenses (102a, 102b) shaped to cast asymmetrical light onto the teeth (110). The lenses are arranged one-to-one with associated light sources (101a, 101b). The first and second lenses are arranged to project the received light onto a buccal side (111) of the teeth (110), and each of the first and second lenses has an asymmetrically shaped refraction surface (301) shaped to change an intensity distribution of the received light asymmetrically on opposite sides of an optical axis (121) of the respective light source along the dental arch (201) of the teeth.

Abstract: The invention relates to a mouthpiece (100) for illumination of teeth, e.g. for teeth whitening. The mouthpiece comprises a slab shaped light guide (203), at least one light source arranged for injecting light into the light guide and an optically transparent element (101) arranged to contact the light guide. The optically transparent element has a lower refractive index than the light guide to enable total internal refection of the injected light. Light is coupled out of the light guide by an out-coupling structure (210) and through a part of the optically transparent part located between the light guide and the buccal side of the teeth to illuminated the teeth with uniform light.