Lumileds LLC

Lumileds Holding B.v.

Rob Engelen

Emanuel Stassar

Peter Josef Schmidt

Varun Dev Kakkar

Thomas Diederich

Erno Fancsali

Embodiments of the invention include an infrared-emitting phosphor comprising (La,Gd)GaAlSiO:Cr, where 0≤x≤1 and 0.02≤y≤0.08. In some embodiments, the infrared-emitting phosphor is a calcium gallogermanate material. In some embodiments, the infrared-emitting phosphor is used with a second infrared-emitting phosphor. The second infrared-emitting phosphor is one or more chromium doped garnets of composition GdScLuGaO:Cr, where 0.02≤x1≤0.25, 0.05≤x2≤0.3 and 0.04≤y≤0.12.

Wavelength converting material for a light emitting device

The invention refers to a lighting device comprising at least one light emitting diode (LED). The object to provide a lighting device that is capable of providing a light pattern for illuminating an object in 3D imaging, wherein the lighting device is simple and cost-effective to manufacture, while the lighting device may in addition have a very small form factor, is solved in with a lighting device comprising: at least one LED for emitting light towards a light-emitting side; a first grating with a regular pitch having light-blocking sections and light-permeable sections; wherein the first grating is arranged on the light-emitting side to block the passage of light at the light-blocking sections, such that the light passing the light-permeable sections is capable to illuminate an object with a line pattern. The invention further corresponds to a method for producing a lighting device and the use of a lighting device.

Lighting device comprising LED and grating

A biometric identification system and a method for biometric authentication are described. A biometric authentication system includes at least one light source comprising at least one of a vertical surface emitting laser (VCSEL) or a VCSEL array configured to provide an illumination beam when the biometric authentication system is turned on. The system also includes an optical element configured to broaden the illumination beam and direct the illumination beam towards the portion of the object so as to generate at least one corresponding image response. The system also includes an image sensing unit configured to receive the at least one corresponding image response, capture a speckle pattern in the image response and form at least one of a computer readable image or data representing a speckle contrast in the speckle pattern.

Laser speckle analysis for biometric authentication

The invention describes a device () and a method () for bio metric identification of an object with a significantly improved signal-to-noise ratio. The device comprises an optical image sensor element () at least sensitive to an infrared spectrum to take at least one picture () of the object () under ambient light conditions (ALC) with additional infrared light conditions (ILC), an infrared light source () to provide additional infrared light (IR) for the infrared light conditions (ILC), and a processing unit () to provide an image or image code () for the bio metric identification obtained from the picture (), where the infrared light source () emits a narrow infrared light spectrum with a peak wavelength () between 925 nm to 955 nm and with a full width of half maximum of less than 5 nm, and where an infrared bandpass filter () is arranged in the light path (LP) between the object () and a sensor array of the optical image sensor element () having a transmission window () between 925 nm and 955 nm covering at least the peak wavelength () of the infrared light source ().

VCSEL based biometric identification device

A lighting module and a lighting assembly provide high irradiance at long working distances. The lighting module includes at least two rows of multiple LEDs separated from each other by an intermediate area between the rows and one integral optical element on top of the at least two rows of multiple LEDs. The one integral optical element includes one collimator lens portion per row of LEDs extending along the row of LEDs. The collimator lens portions of different rows are merged together above the intermediate area. The collimator lens portions, seen in a direction perpendicular to the at least two rows, provide an off-axis focus for the one collimator lens portion, and focus light emitted from the at least two rows of multiple LEDs in a focus line extending parallel to the rows of LEDs at a focus distance above the optical element.

Lighting assembly with high irradiance

Systems, methods and devices are for optical imaging are described. A system includes a light source and a light detection unit. The light source includes a light-emitting device and a first spectral filter opposite the light emitting device. The first spectral filter includes at least one dielectric filter and has a first angular dependence of a transmission passband. The light source further includes at least one reflector adjacent side surfaces of the light emitting device. The light detection unit includes an optical sensor and a second spectral filter opposite the optical sensor. The second spatial filter has a second angular dependence of a transmission passband that is matched to the first angular dependence.

System for optical imaging comprising matched spectral filters

An illumination module comprises a semiconductor light source and a light guide, which comprises a solid body with essentially parallel entry and exit faces and side faces extending between the entry and exit faces; and wherein the entry face receives light emitted by the semiconductor light source; the exit face is offset from the entry face and the area of the exit face exceeds the area of the entry face; a first side face comprises a uniform plane subtending an angle of inclination to the entry face; a second side face, opposite to the first side face, comprises a plurality of offset sub-faces, each sub-face subtends an angle of inclination relative to the entry face; and the inclined faces are formed so that the direction of light leaving the exit face is essentially the same as the direction of light entering the entry face.

Illumination module

Embodiments of the invention include an infrared-emitting phosphor comprising (La,Gd)GaAlSiO:Cr, where 0&#x2264;x&#x2264;1 and 0.02&#x2264;y&#x2264;0.08. In some embodiments, the infrared-emitting phosphor is a calcium gallogermanate material. In some embodiments, the infrared-emitting phosphor is used with a second infrared-emitting phosphor. The second infrared-emitting phosphor is one or more chromium doped garnets of composition GdScLuGaO:Cr, where 0.02&#x2264;x1&#x2264;0.25, 0.05&#x2264;x2&#x2264;0.3 and 0.04&#x2264;y&#x2264;0.12.

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Eindhoven, Netherlands

Rob Engelen