Transmitter that includes a light source, a spatial light modulator including a modulation part that modulates illumination light emitted from the light source, a first mirror that is arranged on a first optical path of the modulated light modulated by the modulation part and reflects the modulated light toward a first projection range, and a second mirror that is arranged on a second optical path of the modulated light modulated by the modulation part and reflects the modulated light toward a second projection range around the first projection range. The first mirror and the second mirror are disposed at positions deviated from an optical path of unnecessary light included in the modulated light.

A beam director for use in 3D printers comprises a first mirror rotating about its longitudinal axis for redirecting a beam onto a second mirror and then onto a work surface, which may result in a beam with a distorted elliptical shape. A beam corrector, e.g. a lens or a reflective surface, is used to ensure the beam has the same dimensions in first and second perpendicular directions.

The invention relates to a projector module. In particular, the invention relates to a projector module for the use in mobile devices, wherein a most compact, stable and reliable module structure with high module efficiency can be achieved. A projector module according to the invention comprises a beam path with a laser source, designed to emit coherent electromagnetic radiation with a divergent beam profile; a collection optics, designed to collimate or focus convergently into an image plane the divergent radiation emitted by the laser source; and a diffractive optical element, DOE, designed to generate a projection pattern from the radiation collimated or converged by the collection optics; wherein a deflector, designed to deflect the divergent radiation emitted by the laser source from a first direction into a second direction deviating from the first direction, is arranged in front of the collection optics or is designed as a collection optics.

The invention relates to a projector module. In particular, the invention relates to a projector module for the use in mobile devices, wherein a most compact, stable and reliable module structure with high module efficiency can be achieved. A projector module according to the invention comprises a beam path with a laser source, designed to emit coherent electromagnetic radiation with a divergent beam profile; a collection optics, designed to collimate or focus the divergent radiation emitted by the laser source convergently into an image plane; and a diffractive optical element, DOE, designed to generate a projection pattern from the radiation collimated or focused by the collection optics; wherein a deflector, designed to deflect the divergent radiation emitted by the laser source from a first direction into a second direction deviating from the first direction, is arranged in front of the collection optics or is designed as a collection optics.

A light irradiation apparatus that splits white light into light rays of a plurality of wavelengths to apply the light ray includes a white light source, a diffraction grating that splits white light emitted by the white light source into light rays of a plurality of wavelengths, and a light selector that selects a light ray of a specified wavelength from the light rays of the plurality of wavelengths split by the diffraction grating.

A beam director for use in 3D printers comprises a first mirror rotating about its longitudinal axis for redirecting a beam onto a second mirror and then onto a work surface, which may result in a beam with a distorted elliptical shape. A beam corrector, e.g. a lens or a reflective surface, is used to ensure the beam has the same dimensions in first and second perpendicular directions.

Articles and systems for dark microscopy and related methods are generally described.

A nonreciprocal Solar thermophotovoltaic (STPV) system includes an absorber configured to absorb broad-spectrum solar radiation and generate heat an intermediate emitter, and a single-junction photovoltaic cell configured to convert solar radiation to electrical energy. The intermediate emitter includes nonreciprocal radiative properties. The nonreciprocal radiative properties include absorbing light from the front side but only emitting light to the backside.

An optical system for a projection exposure apparatus, comprising a first component, a second component, and a fastening device used to attach the second component to the first component. The fastening device has a decoupling bushing for mechanically decoupling the second component from the first component. The decoupling bushing has a decoupling groove reducing the rigidity of the decoupling bushing.

To provide an optical module that can further be reduced in size, an optical module according to the present invention includes a casing, a light source that is mounted on a first surface of the casing and outputs light, a first reflection means that is arranged at a position facing the light source and reflects the light from the light source to a direction vertical to the first surface, a second reflection means that reflects the light from the first reflection means to a direction parallel to an output direction of the light from the light source, and a transmission means that transmits the light from the second reflection means.