An optical element for light concentration for a predefined wavelength range, includes a holding sleeve which is formed in such a way that a light passage volume is framed by at least one reflective partial surface of the holding sleeve, and a light transmission element, with which the light passage volume is at least partly filled and which is transmissive, at least for the predefined wavelength range. The light transmission element is at least partly formed from at least one medium that is diffuse for the predefined wavelength range, and has at least one first subregion having at least a first diffusivity and a second subregion having at least a second diffusivity differing from the first diffusivity. The disclosure further relates to a method for producing an optical element for light concentration.

A transmitter of a wireless power transfer and data communication system comprising a transmitter system including a transmitter housing, one or more high-power laser sources, a laser controller, one or more low-power laser sources, one or more photodiodes, a beam steering system and lens assembly, and a safety system. High-power and low-power beams are directed to corresponding receivers and transceivers of a transceiver system inside a remote receiver system by the controller and the beam steering system and lens assembly. Low-power beams include optical communication to the transceiver system. The photodiodes of the transmitter system receive optical communication from the transceiver system. Low-power beams are co-propagated with and in close proximity to high-power beams substantially along an entire distance between the transmitter housing and the receiver system. The safety system instructs the controller to reduce the high-power sources in response to detected events.

A single crystal multilayer low-loss optical component comprising first and second layers made from dissimilar materials, with the materials comprising the first layer lattice-matched to the materials comprising the second layer. The first and second layers are grown epitaxially in pairs on a growth substrate to which the materials of the first layer are also lattice-matched, such that a single crystal multilayer optical component is formed. The optical component may further comprise a second substrate to which the layer pairs are wafer bonded after being removed from the growth substrate.

An infrared lamp 100 is composed of an LED 110 that emits infrared light and a cut filter 120 that transmits a part of the light from the LED 110. And a peak wavelength of the light emitted from the LED 110 in the lighting starting stage is set to be shorter than a cut-on wavelength of the cut filter 120.

A far-infrared (FIR) emitter includes at least one far-infrared source for generating a far-infrared beam, a filter unit for filtering a wavelength range of the far-infrared beam, and a beam-expanding unit for expanding the far-infrared beam. The FIR emitter can generate a FIR light of a specific wavelength range to cover an expanded projection area.

A light source-integrated lens assembly includes a lens including first through hole at its center along optical axis, an internal light shielding member including second through hole at its center and first protrusion that protrudes from front surface of the lens, and a light emitting element configured to emit light to target object. The internal light shielding member is fitted into the first through hole and the light emitting element is fitted into the second through hole to form a single integrated unit. The lens receives light emitted from the light emitting element and diffused and reflected from inside the target object. When the internal light shielding member is brought into contact with surface of the target object, the internal light shielding member prevents light emitted from the light emitting element and directly reflected at the surface of the target object from being incident on the lens.

There is provided an illumination system of a navigation device including a light beam shaping optics, and a first light source and a second light source having different characteristics. The light beam shaping optics is used to shape light beams emitted by the first light source and the second light source to illuminate a work surface with substantially identical incident angles and/or beam sizes.

A device for converting electromagnetic radiation into electricity comprises an expander that includes a conical shape having an axis and a curved surface that is configured to reflect electromagnetic radiation away from the axis to expand a beam of the electromagnetic radiation; and one or more energy conversion components configured to receive a beam of electromagnetic radiation expanded by the expander, and to generate electricity from the expanded beam of electromagnetic radiation. With the expander's curved surface, a beam of electromagnetic radiation that is highly concentratedhas a large radiation fluxmay be converted into a beam that has a larger cross-sectional area. Moreover, one can configure, if desired, the curved surface to provide a substantially uniform distribution of radiation across the expanded cross-sectional area. With such an expanded beam the one or more energy conversion components can efficiently convert some of the electromagnetic radiation into electricity.

A reflector assembly for an additive manufacturing apparatus comprises a first reflector comprising a first reflector section having a first reflecting surface and a second reflector comprising a second reflector section having a second reflecting surface. The first reflector section is for reflecting radiation from a first radiating element located, in use, proximate to the first reflecting surface, and the second reflector section is for reflecting radiation from a second radiating element located, in use, proximate to the second reflecting surface. The first reflector section and the second reflector section are each formed of a ceramic material.

An optical unit includes a ball lens and a light source. The ball lens is configured to condense light and to output the condensed light. The light source has a light emitting surface and is configured to output light toward the ball lens. The light emitting surface is located closer to the ball lens than a focal position of the ball lens.