An image display apparatus according to one embodiment of the present disclosure includes: an output unit including a light source and outputting projection light outputted from the light source along a predetermined axis; an irradiation target member to be irradiated with the projection light; a first optical member disposed opposite to the output unit along the predetermined axis and controlling an incident angle of the projection light to be incident on the irradiation target member; and a second optical member included in the output unit and adjusting an illumination range of the projection light to be incident on the first optical member such that the illumination range has an aspect ratio of substantially the same as an aspect ratio of an outer shape of the first optical member.

The present invention relates to a retention apparatus comprising a) a retention body, which delimits an inner region at least on a first side and a further side opposite to the first side, and b) at least one spring element;
wherein the retention body comprises, on the first side, a first receiving portion facing the inner region and, on the further side, a second receiving portion facing the inner region; wherein the retention apparatus is embodied to retain at least one optical module, which has a light input side and an opposing light output side, by means of the first receiving portion, the second receiving portion, and the at least one spring element in a retention state,
in such a way that the at least one optical module in the retention state is retained a. in a first direction extending from the light input side to the light output side by means of an interlock of i. the at least one optical module with the first receiving portion and ii. the at least one optical module with the second receiving portion, and b. in the opposite direction to the first direction by means of a spring force of the at least one spring element directed against the at least one optical module.

Further, the invention relates to a luminaire having the retention apparatus according to the invention; a printing machine having the luminaire according to the invention; a production method using the luminaire according to the invention; and uses of the retention apparatus according to the invention; and of the luminaire.

A texture image acquiring device, a display device and a collimator are disclosed. The texture image acquiring device (10) includes a collimator (110) and an image sensor (120). The collimator (110) includes a lens array (111), a first diaphragm layer (112), and a second diaphragm layer (113). The lens array (111) is configured to allow light rays to be converged and incident on the first diaphragm layer (112). The first diaphragm layer (112) is configured to allow light rays incident on the first diaphragm layer (112) to pass through and be incident on the second diaphragm layer (113), and to restrict an angle of light rays capable of passing through the first diaphragm layer (112). The second diaphragm layer (113) is configured to allow light rays incident on the second diaphragm layer (113) to pass through, and to restrict an angle of light rays capable of passing through the second diaphragm layer (113). The image sensor (120) is configured to sense light rays incident on the image sensor (120) for acquiring a texture image. The texture image acquiring device (10) has a light and thin structure, and can improve the accuracy of the acquired texture image.

An illumination device includes an emission layer including a semiconductor-based light emitter; and an optical layer disposed on the emission layer. The optical layer includes an optical element, such as a lens, at least partially aligned with the semi-conductor-based light emitter. The optical layer is formed of a material having a negative coefficient of thermal expansion (CTE). For instance, the semiconductor-based light emitter is configured to emit light at a wavelength λ, and in which a pitch p of the MLA, a thickness z of the optical layer, and the wavelength λ satisfy a predefined relationship.

The invention relates to an optical device for a vehicle with at least one lens comprising an optical axis, an output diopter, and an input diopter. The device including a light source arranged to emit light towards the input diopter of the at least one lens, with the at least one lens having an object focus located substantially on the input diopter of the lens. A section of the output diopter in a vertical plane parallel to the optical axis of the at least one lens includes one or more elliptical or substantially elliptical arcs which are modified relative to a reference elliptical shape, in which all the rays coming from the light source would be emitted parallel to the optical axis of the at least one lens at the output of a reference output diopter.

This document relates to head mounted display devices. One example can include a layer of individually controllable pixels that can be energized to emit light and a layer of lenses that are physically aligned over the pixels. The example can also include a layer of shutters interposed between the pixels and the lenses and configured to be independently transitioned between a transmissive state and an opaque state to limit paths of the emitted light that reach the layer of lenses.

The invention relates to an arrangement for producing a Bessel beam (5), comprising a beam-forming element (2), which transforms a beam (1) incident as a plane electromagnetic wave into a Bessel beam (5). According to the invention, the beam-forming element (2) comprises at least one annular lens (3, 3′) and a Fourier optical unit, e.g. in the form of a Fourier lens (4).

A laser system includes: a pulse laser system configured to emit a first laser beam having a first wavelength component and having a first polarization component and a second laser beam having the first wavelength component and having a second polarization component; a guide laser apparatus configured to emit a third laser beam having a second wavelength component; a polarization conversion mechanism configured to be able to switch between a first state in which the third laser beam is emitted as a first guide laser beam having the first polarization component, and a second state in which the third laser beam is emitted as a second guide laser beam having the second polarization component; a dichroic mirror configured to reflect the first and second laser beams having the first wavelength component or the first and second guide laser beams having the second wavelength component, to transmit the first and second laser beams or the first and second guide laser beams that are not reflected by the dichroic mirror; and a polarization beam splitter configured to reflect the first laser beam and the first guide laser beam, and to transmit the second laser beam and the second guide laser beam.

An embodiment includes a light source. The light source may include a substrate and a diffuser. The substrate may include a first surface and a second surface. The second surface may be opposite the first surface. The diffuser may be carried by the substrate. The diffuser may be configured to receive an optical signal from the substrate after the optical signal propagates through the substrate and to control a particular profile of a resultant beam of the optical signal over two axes after the optical signal propagates through the integrated diffuser.

An illumination device of the present disclosure includes: a first light source unit that emits first light of a first wavelength band; a first spatial light modulator where the first light from the first light source unit enters; a second light source unit that emits second light of a second wavelength band; an integrator optical system including a first fly-eye lens where the second light from the second light source unit enters and generating illumination light for an illumination target on a basis of the first light having been modulated by the first spatial light modulator and the second light from the second light source unit; and a multiplexing optical system that multiplexes the second light having entered the first fly-eye lens and the first light having been modulated by the first spatial light modulator, in an optical path between the first fly-eye lens and the illumination target.