Abstract: An example device may include a light source, an optical element, and, optionally, an encapsulant layer. A light beam generated by the light source may be received by the optical element and redirected towards an illumination target, such as an eye of a user. The optical element may include a material, for example, with a refractive index of at least approximately 2 at a wavelength of the light beam. The light source may be a semiconductor light source, such as a light-emitting diode or a laser. The optical element may be supported by an emissive surface of the light source. Refraction at an exit surface of the optical element, and/or within a metamaterial layer, may advantageously modify the beam properties, for example, in relation to illuminating a target. In some examples, the light source and optical element may be integrated into a monolithic light source module.

Abstract: An apparatus that includes a structured light projector which includes a light source, a metalens, and a diffractive optical element (DOE) multiplier. Each of the metalens and the DOE multiplier is integrated onto the light source. The structured light projector is operable such that light beams produced by the light source pass through the metalens and the DOE multiplier.

Abstract: An example device may include a light source, an optical element, and an encapsulant layer. A light beam generated by the light source may be received by the optical element, and redirected into the encapsulant layer. The optical element may include a high-index material, for example, with a refractive index of at least approximately 1.5 at the wavelength of the light beam. The light source may be a semiconductor light source, such as a light emitting diode or a laser. The optical element may be embedded in the encapsulant layer, and the optical element may have a curved exit surface. Refraction at the exit surface of the optical element may redirect the light beam towards a target.

Abstract: An apparatus includes a light source operable to produce light having a wavelength, an optical component disposed over the light source so as to intersect a path of light produced by the light source, and at least one electrically conductive trace on a surface of the optical component. A drive controller is operable to regulate optical output power of the light source. The at least one electrically conductive trace is coupled electrically to the drive controller, which is operable to monitor an electrical characteristic of the at least one electrically conductive trace, and to reduce the optical output power of the light source if a value of the electrical characteristic is indicative of a possible eye-safety hazard.

Abstract: The present disclosure describes various linear VCSEL arrays, as well as VCSEL array chips incorporating such linear VCSEL arrays, and modules, host devices and other apparatus into which one or more of the linear VCSEL arrays are integrated. Implementations can include, for example, varying the aperture size of the VCSELs, tapering the shape of the transmission line, and/or changing the density of the VCSELs.

Abstract: An apparatus that includes a structured light projector which includes a light source, a metalens, and a diffractive optical element (DOE) multiplier. Each of the metalens and the DOE multiplier is integrated onto the light source. The structured light projector is operable such that light beams produced by the light source pass through the metalens and the DOE multiplier.

Abstract: A VCSEL includes a substrate, and an epitaxial VSCEL structure on the substrate. The epitaxial VSCEL structure includes a resonant cavity, including a gain region, disposed between a first reflector and a partially reflecting second reflector. At least one of the first or second reflectors includes a first sub-wavelength grating to provide spectral control for optical emission from the VCSEL. The first sub-wavelength grating can be operable to lock a wavelength of an optical beam for emission from the VCSEL substantially to a wavelength defined by the grating.

Abstract: An example device may include a light source, an optical element, and, optionally, an encapsulant layer. A light beam generated by the light source may be received by the optical element and redirected towards an illumination target, such as an eye of a user. The optical element may include a material, for example, with a refractive index of at least approximately 2 at a wavelength of the light beam. The light source may be a semiconductor light source, such as a light-emitting diode or a laser. The optical element may be supported by an emissive surface of the light source. Refraction at an exit surface of the optical element, and/or within a metamaterial layer, may advantageously modify the beam properties, for example, in relation to illuminating a target. In some examples, the light source and optical element may be integrated into a monolithic light source module.

Abstract: A multi-wavelength VECSEL includes an active region comprising a plurality of semiconductor quantum wells having an intrinsically broadened gain with a wavelength selective filter disposed within the cavity to provide a laser output that oscillates at two or more separated wavelengths simultaneously. A non-linear crystal may be provided in the cavity to emit radiation at a frequency in the THz range that is the difference of the frequencies associated with two of the separated wavelengths.

Abstract: The invention relates to a method for analysing the material of a sample (3) using terahertz spectroscopy in order to identity material irregularities of the sample (3), having the following steps: (a) a terahertz wave transmitting device (5, 8) is used to transmit electromagnetic waves (6, 9) at a frequency in that terahertz range to the sample (3) to be analysed, (b) a terahertz wave receiving device (1, 8) is used to receive electromagnetic waves (7, 9) in the terahertz range from the sample (3), (c) the terahertz wave receiving device (1, 8) supplies the received waves (7, 9), in the form of a time domain signal or a frequency domain signal, to an evaluation device (10), (d) if a signal supplied to the evaluation device (10) is a time domain shier, the evaluation device (10) converts the time domain signal into a frequency domain signal (11) by means of a first spectral transformation, (e) the evaluation device (10) converts the frequency domain signal (H) into an output function (Q(x)) by means of a seco

Abstract: The present invention relates generally to a terahertz and millimeter wave source, and more particularly, but not exclusively, to structures for coupling the terahertz electromagnetic waves out of the source.