A luminaire includes a housing (102) with an inner cavity a light source (122) mounted to an inner top surface of the housing. The luminaire also includes a door frame (104), wherein the door frame includes a first side rail (108), a second side rail (109), a third side rail (107), and a fourth side rail (110). The four side rails of the door frame define a light emitting opening for the luminaire. A film stack (116) is supported by the door frame and placed in the light emitting opening so that light from the light source passes through the film stack as it is emitted through the light emitting opening. The film stack (116) includes a diffuser film (129) and a photopolymer film (127). The photopolymer film (127) is embossed with optical structures that create a holographic pattern that appears to be three-dimensional.

A medical luminaire, for example a dental treatment luminaire for the intraoral illumination of a surgical field, has at least one illuminating unit with light-producing means and with optical means for generating a field of light in an object plane, wherein a diffuser is provided that is designed to widen the field of light in the object plane.

This specification describes an improved automated luminaire employing an improved laser optical module with a laser module and an optical module, which expands the width of the laser light beam emitted from the laser module.

An embodiment relates to a vehicular lamp and a vehicle comprising the same, the vehicular lamp comprising: a lens portion; and a light source portion for emitting light toward the lens portion, wherein the lens portion comprises a body having least one curved surface and a film portion arranged on one side of the body so as to generate a 3D stereoscopic image using the light, and the lens portion is injected in an in-mold labelling (IML) type using a mold. Accordingly, the design-related degree of freedom can be improved, thereby providing an enhanced aesthetic appearance, and the manufacturing process can be simplified, thereby improving the productivity.

Provided is a lighting device capable of safely illuminating a region to be illuminated having a first direction while making its edge sharp. A lighting device illuminates a region to be illuminated extending in a first direction and extending in a second direction intersecting with the first direction. The lighting device includes a light source and a diffractive optical element having a first hologram component and a second hologram component both of which diffract light from the light source and direct the light to the region to be illuminated, wherein the diffracted light from the first hologram component illuminates the entire region of the region to be illuminated and the diffracted light from the second hologram component illuminates the entire region of the region to be illuminated.

Described is a holographic film (100) whose transmission and/or reflection properties vary periodically along at least one of its directions of principal extent, said film being designed for at least partial transmission (22, 28) of light (20, 26) of at least one first wavelength range that is irradiated from a multiplicity of periodically disposed illuminants (200) and that impinges on the holographic film (100). Also described are a lighting means (300), a backlighting means and a method for producing a holographic film (100).

An optical cell (10) for forming a luminaire, the optical cell (10) comprising: (i) a light collector element (14), (ii) a cover element (15) attached to the light collector element (14), and (iii) a transmission element (16) mounted between the light collector element (14) and the cover element (15); wherein: (iv) the light collector element (14) comprises a body including: an input, e.g. an input opening, for receiving and collecting light from at least one light source, e.g. one or more LEDs (32) pre-mounted on a circuit- or wiring board (30); an output, e.g. an output opening, for propagating collected light towards the transmission element (16); at least one wall (52) defining one or more portions of the body, such as an internal chamber (53) therewithin, between its input and output, and configured for collecting light entering the body/chamber (53) via its input and conveying or directing said light towards its output; and attachment means (55, 65) for mechanically attaching the light collector element (14) to the cover element (15) and securing the transmission element (16) therebetween; (v) the cover element (15) comprises: an input opening facing towards the transmission element (16) and for receiving light transmitted thereby; an output opening via which light is outputted from the optical cell (10); and at least one internal surface (62) defining a cavity (63) within the cover element (15) between its input and output openings, the cavity's internal surface(s) (62) being configured for allowing or effecting passage of light, or a portion of the light, through the cavity (63) from the cover element's input opening towards its output opening; and (vi) the transmission element (16) comprises: one or more planar optical elements, wherein the or each optical element includes a first surface facing towards the output of the light collector element (14) and a second surface facing towards the input opening of the cover element (15), and the or each optical element exhibits a predetermined optical activity or function in its transmission of light incident thereon which has exited the output of the light collector element (14) and is transmitted by the transmission element (16) towards the input opening of the cover element (15).

An arrangement (1) for forming into a luminaire, the arrangement (1) comprising: one or more optical cells (10) each including means for receiving, collecting and redistributing light from a respective one of one or more light sources (32), e.g. LEDs; and a configuring element (20) for accommodating the one or more optical cells (10) in a predefined relative configuration or pattern; wherein the configuring element (20) comprises a sheet or plate or film of material having one or more apertures (22) therein in the said predefined relative configuration or pattern, each aperture (22) being for receiving therein a respective one of the said cells (10).

Some examples herein include systems and methods of creating standards of gemstones of various classifications, which may display certain characteristics of the various classifications when excited by ultraviolet radiation and fluoresce in response. In some examples, a set of standards are created using fluorescent material, filters, and a radiation source to compare against a sample gemstone. In some examples, specific Light Emitting Diodes are selected to illuminate the gemstone samples under analysis.

An LED light engine includes a plurality of LED emitters; a first lens array having a plurality of collimating lenslets corresponding to the plurality of LED emitters, where the first lens array is optically coupled to the plurality of LED emitters and configured to emit a plurality of light beams corresponding to the plurality of LED emitters, each of the light beams including partially collimated light rays; a light integrator optic to receive the plurality of light beams and to internally reflect the light beams to generate a plurality of at least partially-homogenized light beams; a homogenizer optically coupled to the light integrator optic and configured to receive the plurality of at least partially-homogenized light beams from the light integrator optic; and a converging lens optically coupled to the homogenizer. The homogenizer and the converging lens illuminate a gate with the plurality of light beams from the light integrator optic.