A device includes a light source configured to output a first beam, and a light guide coupled with an in-coupling element and an out-coupling element. The device includes a display panel and a lens assembly disposed at opposite sides of the light guide. The in-coupling element is configured to couple the first beam into the light guide as a second beam. The out-coupling element is configured to couple a first portion of the second beam out of the light guide as a third beam propagating toward the display panel to illuminate the display panel, and couple a second portion of the second beam out of the light guide as a fourth beam propagating toward the lens assembly. A normal of a surface of the light guide where the out-coupling element is disposed is tilted by a predetermined angle with respect to an axis of the display panel.

A optical path structure and a cross line laser comprising the same are provided. The optical path structure comprises a laser emitter (1) for emitting laser light, and the following devices arranged sequentially along the direction of the optical path of the laser light: an aspherical mirror (2), a first beamsplitter (31) and a second beamsplitter (32), a wedge-shaped mirror (4), and a cylindrical mirror (5). The advantages of the present invention are that: 1) the angle of the incident surface (41) of the wedge-shaped mirror (4) is reasonably set such that the light ray reflected by the incident surface (41) of the wedge-shaped mirror (4) cannot emit onto the beamsplitters (31, 32), or even if it emits onto the beamsplitters (31, 32), there is no interference with the reflected light rays (61, 63) by the beamsplitters (31, 32), avoiding the multiple-point phenomenon; 2) the structure of the wedge-shaped mirror (4) is reasonably set such that the breakpoints in the projected laser light line are eliminated.

An optical beam expander and a luminaire, including: a collimating lens configured for adjusting light emitted by a light source to parallel light; a condensing lens, the condensing lens including a plurality of inclined light-control surfaces, and any one of the light-control surfaces is not parallel to a plane in which the condensing lens is located, the condensing lens being configured for refracting the parallel light emitted from the collimating lens towards a direction of a center line of the condensing lens; and a fixing component, configured for fixing the collimating lens and the condensing lens, so that an optical axis of the collimating lens coincides with an optical axis of the condensing lens.

A device for alternating between different shapes of a light beam includes a multi-plane light conversion (MPLC) device that is used to apply a unitary transformation to a light beam by way of a succession of elementary transformations. The MPLC faces the light source so that the light beam is emitted into the MPLC device along a reference axis. The device further includes automated means arranged upstream of the multi-plane light conversion (MPLC) device for varying the transverse position and/or the angle of incidence of the light beam in relation to the reference axis and/or to vary the angle of rotation of the light beam about the reference axis. The MPLC device is designed to transform a variation of the transverse position and/or the angle of incidence and/or the angle of rotation of the light beam into a modification of the specific shape of the light beam.

A projection apparatus and an illumination system that includes an excitation light source, a beam filter module, a wavelength conversion module and a homogenizing element are provided. The beam filter module includes a light effective region and is disposed on a transmission path of an excitation beam. The wavelength conversion module includes a wavelength conversion region and is disposed on a transmission path of the excitation beam reflected by the light effective region. The wavelength conversion region converts the excitation beam into a conversion beam. The conversion beam from the wavelength conversion module passes through the light effective region and then forms at least one color light. An optical axis of the excitation beam incident on the light effective region and a normal line of the light effective region are respectively not parallel to a central axis of the homogenizing element.

An illumination system, including an excitation light source, a beam splitting filter device, and a wavelength conversion element, is provided. The excitation light source is configured to emit an excitation beam. The beam splitting filter device includes a light penetration region and a beam splitting filter region. The excitation beam penetrates the light penetration region to form a first beam. The excitation beam is reflected by the beam splitting filter region. The wavelength conversion element is disposed on a transmission path of the excitation beam coming from the beam splitting filter region. The wavelength conversion element is configured to convert the excitation beam coming from the beam splitting filter region to a conversion beam and transmit the conversion beam back to the beam splitting filter region, and the conversion beam at least partially penetrates the beam splitting filter region to form a second beam. A projection device is also provided.

A light projecting apparatus is disclosed. The apparatus has a head with first and second light sources. There is a first reflector and a second reflector respectively disposed proximate to the first and second light sources. Each of the first and second reflectors has a concave reflective surface and a convex reflective surface configured to form light emitted by the respective light source into an illumination pattern having a central region having a substantially uniform distribution of luminous intensity and a taper region having a tapered luminous intensity.

An optical device is provided that includes a first optical member made of a birefringent material and disposed so that an optical axis of the first optical member is neither parallel nor orthogonal to a direction in which incident light travels. Moreover, a second optical member made of a birefringent material is disposed so that an optical axis of the second optical member is neither parallel nor orthogonal to the direction in which the incident light travels. A third optical member is disposed between the first and second optical members and generates an optical path difference of {¼+m×(½)}×λ (m is an integer) between orthogonal polarization components of light emitted from the first optical member. At least one of the optical members is rotatable about an axis of the incident light.

An optical system and a method for producing it is disclosed. The optical system has at least two separate optical components and an optical connection between them. In the inventive method, first and second optical component are provided, each having respective beam profiles. An arrangement of the first and second optical components and the form and target position of at least one beam-shaping element are specified. The beam-shaping element is produced using a three-dimensional direct-writing lithography method in situ at the target position to thereby obtain an optical component supplemented by the beam-shaping element. The supplemented optical component is placed and fixed on common base plate to thereby obtain the optical system. The optical systems produced with the present method can be used in optical data transfer, measurement technology and sensors, life sciences and medical technology, or optical signal processing.

An optical system and a method for producing it is disclosed. The optical system has at least two separate optical components and an optical connection between them. In the inventive method, first and second optical component are provided, each having respective beam profiles. An arrangement of the first and second optical components and the form and target position of at least one beam-shaping element are specified. The beam-shaping element is produced using a three-dimensional direct-writing lithography method in situ at the target position to thereby obtain an optical component supplemented by the beam-shaping element. The supplemented optical component is placed and fixed on common base plate to thereby obtain the optical system. The optical systems produced with the present method can be used in optical data transfer, measurement technology and sensors, life sciences and medical technology, or optical signal processing.