Illuminator for illuminating a surface

Abstract

A luminaire that produces two light beams. A first light is generated from a first cavity of the luminaire and output from the first cavity of the luminaire as a first light beam. Second light is generated from the second cavity and output from the second cavity to the third cavity via an elongate member that performs beamshaping on the second light. The beamshaped second light is output from the third cavity as a second beam. An elongate member holder holds or supports the elongate member and provides at least partial boundaries for the first and second lumens.

Description

Technical Field

[0001] The invention relates to the field of lighting and in particular to a luminaire for illuminating a wall with two light beams. Background Art

[0002] There is an increasing interest in accent lighting. One area of ​​growing interest is in surface lighting, which is often provided by luminaires that project light onto a surface to provide a wall wash effect. Wall wash lighting has the perceptual effect of improving the sense of space and providing texture and interest to the illuminated surface. Typically, luminaires capable of providing a light pattern include a light source that emits or projects light in the direction of a surface. For example, currently available luminaires include directional downlights or spotlights that are positioned to illuminate a wall or surface.

[0003] One area of ​​particular interest is in providing a two-tone effect on illuminated surfaces. In this scenario, a surface or wall is illuminated by two separate beams that appear stacked one on top of the other, forming an upper illuminated area with a first light characteristic and a lower illuminated area with a second, different light characteristic. The upper and lower illuminated areas may differ in color, color temperature and / or intensity. Summary of the invention

[0004] The invention is defined by the claims.

[0005] According to an example according to one aspect of the present invention, a luminaire for illuminating a surface with two light beams is provided.

[0006] The luminaire comprises: a first cavity accommodating a first illumination device for generating a first light having a first optical characteristic, the first cavity comprising a first light output window for outputting the first light from the first cavity to the outside of the luminaire in the form of a first light beam; a second cavity accommodating a second illumination device for generating a second light having a second, different optical characteristic; an elongated optical component configured to perform beam shaping on the light provided to the elongated optical component; and an elongated component holder configured to hold the elongated optical component and form at least a portion of a boundary of the first cavity and at least a portion of a boundary of the second cavity.

[0007] The elongated component holder is configured to: prevent or limit not less than 90% of the first light from being transmitted from the first cavity to the elongated optical component; and allow the second light to be transmitted from the second cavity to the elongated optical component; and a third cavity is at least partially defined by the elongated optical component and is configured to receive the beam-shaped second light from the elongated optical component, the third cavity including a second light output window for outputting the beam-shaped second light from the third cavity to the outside of the illuminator in the form of a second light beam.

[0008] The present disclosure provides a luminaire for illuminating a surface or wall with two light beams. A first light beam is output from a first cavity. A second light beam is passed from the second cavity to an elongated optical component, which performs one or more beam shaping processes on the received light. The beam-shaped light passes to a third cavity, from which the second light beam is output.

[0009] The present disclosure proposes to use an elongated component holder as part of the boundary between the first and second cavities and to hold the elongated optical component. This provides a method for reducing the size of the luminaire. This effect is achieved by providing an element that can perform more than one function simultaneously.

[0010] In some examples, the cross-sectional shape of the elongated optical component includes an arc; and the elongated component holder includes a retaining portion having an arc-shaped cross-sectional area for retaining the elongated optical component at the arc of the cross-sectional shape of the elongated component holder. This method provides a compact structure for the elongated component and the elongated component holder.

[0011] The elongate member holder may include a translucent or transparent portion defining at least part of a boundary of the second cavity and configured to allow light to pass from the second cavity to the elongate optical member.

[0012] Preferably, the translucent or transparent portion of the elongate component holder is configured to diffuse light transmitted from the second cavity to the elongate optical component. This increases the uniformity of the light transmitted to the elongate optical component.

[0013] The illuminator may also include an optical foil for performing diffusion of light along the longitudinal axis of the elongated optical element. The optical foil may be held between the elongated optical component and the elongated component holder. The use of the optical foil (e.g., rather than creating or etching a diffuser) reduces the material cost and complexity of manufacturing the illuminator. Positioning the optical foil at this location allows easy installation of the optical foil (thereby providing diffusion functionality) without the need for any additional clamping or retaining components (such as glue, etc.). Therefore, this provides a more compact and cost-effective illuminator.

[0014] In some examples, the elongated member holder includes a reflective portion that defines at least a portion of a boundary of the first cavity and is configured to reflect the first light incident thereon. This retains the first light within the first optical cavity (e.g., rather than the light being absorbed by the elongated member holder), thereby improving the energy efficiency of the luminaire.

[0015] The elongated member holder may include a scattering portion that defines at least a portion of a boundary of the first cavity and is configured to scatter and / or diffuse the first light in the first cavity. This approach increases the uniformity of the first light within the first cavity, giving the first light beam a more uniform intensity distribution and reducing glare.

[0016] The elongated component holder may be configured to prevent light from passing from the elongated optical component to the first cavity. This reduces mixing of the second light with the first light, making the two light beams more distinguishable from each other.

[0017] In some examples, the first light output window and the second light output window are configured to define a distinguishable boundary between the first light beam and the second light beam.This approach can be used to simulate a natural horizon using two light beams.

[0018] The second light output window may be configured to define a distinguishable bottom edge of the second light beam. This reduces the likelihood that the second light beam illuminates an undesired surface (eg, a floor), which would distract from the illumination of the intended surface.

[0019] The luminaire may include a ceiling mount configured to mount the luminaire to a ceiling.

[0020] Preferably, the luminaire is configured such that when the luminaire is mounted to the ceiling via the ceiling mounting bracket, a first light beam output by the luminaire is higher than a second light beam output by the luminaire.

[0021] The first lighting device may include a first group of one or more LEDs. Similarly, the second lighting device may include a second (eg, different) group of one or more LEDs.

[0022] Preferably, the first light has a different color and / or color temperature than the second light.

[0023] In some embodiments, the elongated component holder is an extruded elongated component holder, which is a component holder produced using an extrusion process. This means that a cost-effective mechanism (in terms of material and energy costs) can be used to produce the elongated component holder. Therefore, the use of an extruded elongated component holder provides a more cost-effective luminaire.

[0024] These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] For a better understanding of the invention, and to show more clearly how it may be carried into effect, reference will now be made, by way of example only, to the accompanying drawings, in which:

[0026] Figure 1 A cross-sectional view of the illuminator is provided;

[0027] Figure 2 An exploded view of a portion of the luminaire is provided;

[0028] Figure 3 provides a cross-sectional view of the luminaire installation; and

[0029] Figure 4 The diagram shows a surface illuminated by a luminaire. DETAILED DESCRIPTION

[0030] The present invention will be described with reference to the accompanying drawings.

[0031] It should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the device, system and method, are intended for illustrative purposes only and are not intended to limit the scope of the invention. These and other features, aspects and advantages of the device, system and method of the present invention will be better understood through the following description, the appended claims and the accompanying drawings. It should be understood that the drawings are merely schematic and are not drawn to scale. It should also be understood that the same reference numerals are used throughout the drawings to indicate the same or similar parts.

[0032] Embodiments provide an illuminator that generates two light beams. A first light is generated from a first cavity of the illuminator and output from the first cavity of the illuminator as a first light beam. A second light is generated from a second cavity and output from the second cavity into a third cavity via an elongated member that performs beam shaping on the second light. The beam-shaped second light is output from the third cavity as a second light beam. An elongated member holder holds or supports the elongated member and provides at least a partial boundary for the first and second cavities.

[0033] The invention is based on the recognition that a more compact illuminator can be achieved by using the same components to define or delineate the cavity from which the light is emitted as to perform beam shaping on one of the beams.

[0034] Embodiments may be deployed in any suitable environment where it is desirable to illuminate a surface with two light beams, for example, to provide ambient lighting in an office, home, or industrial environment.

[0035] In the context of the present disclosure, "beam shaping" refers to the process of modifying, changing, or otherwise defining one or more characteristics of a beam shape or distribution (i.e., beam shape or beam distribution). For example, beam shaping may include changing the profile of the beam shape. As another example, beam shaping may include changing the intensity distribution of the beam, such as modifying the shape of the intensity distribution.

[0036] Figure 1 The figure shows a luminaire 100 according to an embodiment. The luminaire is configured to generate two light beams.

[0037] The luminaire includes at least three cavities, including a first cavity 110 , a second cavity 120 , and a third cavity 130 .

[0038] The housing 105 may be used to at least partially define or delimit a cavity.For example, the housing 105 may be formed of any suitable material for the luminaire 100, such as metal (eg, aluminum / aluminum) or plastic.

[0039] The first cavity 110 accommodates a first lighting device 115. The first lighting device generates a first light having a first light characteristic. The first cavity 110 comprises a first light output window 111, which is configured to output the first light from the illuminator 100 (and thus from the first cavity). The light output from the first light output window forms a first light beam.

[0040] The second cavity 120 houses a second lighting device 125. The second lighting device generates a second light having a second light characteristic different from the first light characteristic.

[0041] Example light characteristics include color of light, color temperature of light, pattern of light, intensity of light, temporal pattern of light, etc. Thus, the first light may be different from the second light at least in that any (e.g., a subset or all) of the above example light characteristics have one or more different values.

[0042] Preferably, the first and second lighting devices are configured to emit light of different colors and / or color temperatures. By way of example only, the first lighting device 115 may, for example, output blue light, and the second lighting device 125 may output yellow light. However, other combinations of colors or color temperatures may be advantageously used depending on implementation requirements. For example, the first lighting device 115 may output one of the following: blue light, purple light, violet light, red light, etc. The second lighting device may output one of the following: yellow light, green light, orange light, white light, etc.

[0043] For example, the first lighting device 115 may include a first group of one or more LEDs. Similarly, the second lighting device 125 may include a second, different group of one or more LEDs.

[0044] In the illustrated example, each lighting device is formed on a separate circuit board 116, 126, which is coupled to the housing via one or more corresponding screws 117, 127 or other fixing members. Each circuit board 116, 126 can carry circuit components for driving and / or controlling the operation of the lighting device.

[0045] The lighting device need not be provided on a separate circuit board. Instead, the first and second lighting devices may be mounted on the same circuit board.

[0046] The luminaire 100 further comprises an elongated component holder 140 which holds or supports an elongated optical component 150. The elongated component holder forms at least part of a boundary / boundary / edge of the first cavity 110 and forms at least part of a boundary / boundary / edge of the second cavity 120. In other words, the elongated component holder may define at least some of the contours between the first and second cavities. Other boundaries / edges of the first and second cavities may be defined by other components or parts of the luminaire.

[0047] The elongated optical component 150 is a component that performs beam shaping on the received light. Thus, the light received by the elongated optical component 150 undergoes a shaping process to produce a light beam. For example, beam shaping can create a gradient effect in the light beam (e.g., an effect in which the intensity of light varies relative to a specific direction within the light beam).

[0048] The elongated component holder 140 holds the elongated optical component 150 in a position such that the elongated optical component holds or defines at least a portion of the boundary, demarcation or edge of the third cavity 150. The elongated component holder 140 is located between the elongated optical component 150 and the first cavity 110 and also between the elongated optical component 150 and the second cavity 120.

[0049] The elongated member holder 140 is configured to restrict not less than 90%, such as not less than 95%, of the first light from passing from the first cavity to the elongated member 150. In a preferred example, the elongated member holder completely prevents the first light from passing from the first cavity to the elongated optical member (excluding any stray or leakage light).

[0050] The elongated member holder 140 is also configured to allow second light to pass from the second cavity 120 to the elongated optical member 150. For example, as illustrated, the elongated member holder may include a translucent or transparent portion 141 that defines at least a portion of the boundary of the second cavity and is configured to allow light to pass from the second cavity to the elongated optical member.

[0051] The portion 141 may be configured to diffuse light passing therethrough. This may be achieved by integrating diffusing particles into the portion 141 .

[0052] As illustrated, the elongate member holder is preferably configured to prevent or limit the transfer of light from the elongate optical member to the first cavity by no less than 90%, such as no less than 95%.

[0053] In a preferred example, the elongated member holder is configured to prevent or limit not less than 90%, for example not less than 95%, of light from being transmitted between the first and second cavities. In the illustrated example, this is achieved via a protruding portion 142 of the elongated member holder that defines or delineates the boundary between the first and second cavities.

[0054] As previously described, the elongated optical component 150 performs beam shaping on the received light. Therefore, the second light passing through the elongated component holder 140 from the second cavity 120 and transmitted to the elongated optical component undergoes beam shaping by the elongated component 150. Then, the beam-shaped light is emitted into the third cavity 130.

[0055] The elongated optical component 150 may be, for example, a cylindrical prism of an optically transmissive material such as plastic, glass, etc. In other words, the elongated optical component 150 may act similar to a biconvex lens on the received light. Such an elongated optical component will create / output a beam having a relatively wide beam angle in one direction (parallel to the length of the elongated optical component 150) and a relatively narrow beam angle in another direction (perpendicular to the length of the elongated optical component). Such a beam has reduced the emission of stray light (e.g., light emitted in an undesirable direction) while helping to provide light to the bottom of the third cavity 130.

[0056] The third cavity 130 comprises a second light output window 131 for outputting the beam-shaped second light from the third cavity to the outside of the illuminator in the form of a second light beam.

[0057] Thus, a first light beam is output from the first cavity 120 and a second light beam is output from the third cavity 130. The first light beam contains light originally generated by the first illumination device 115 and the second light beam contains light originally generated by the second illumination device 125. The second light beam is passed to the third cavity 130 via an elongated optical component that performs beam shaping on the light beam.

[0058] In this way, the second light beam is beam-shaped by the elongated optical component. This allows, for example, the second light beam to be controlled to have a gradient (eg a specific intensity distribution).

[0059] The proposed method provides a mechanism to provide two beams in a compact housing, one of which has been beamshaped.

[0060] It will be appreciated that the first and second light beams may overlap in an overlap region. The size of the overlap region will be defined at least by the boundaries of the first light exit window 111 and the second light exit window 131 and the relative positions of the first lighting device 115 and the second lighting device 125 in the first cavity 110 and the second cavity 120. For example, moving the second lighting device 125 to a position further away from the elongated optical component will increase the overlap between the first and second light beams.

[0061] The elongated component holder may be an extruded elongated component holder. Thus, the elongated component holder may have been manufactured or produced using an extrusion process. This means that a cost-effective mechanism (in terms of material and energy costs) may be used to produce the elongated component holder. Thus, the use of an extruded elongated component holder provides a more cost-effective luminaire.

[0062] The elongated optical component may be formed from any suitable material for performing beam shaping on light (eg without significant absorption). Example materials include glass and PMMA. Preferably, the material is one suitable for undergoing a protrusion manufacturing process, the benefits of which have been described previously.

[0063] Various optional features of the luminaire 100 will be described below. Figure 1 This is explained in .

[0064] The cross-sectional shape of the elongated optical component may include an arc. For example, the elongated optical component may have a circular cross-sectional shape.

[0065] The elongated component holder 140 may include a retaining portion 143 having an arcuate cross-sectional area for retaining the elongated optical component at the arcuate cross-sectional shape of the elongated component holder. For example, the retaining portion may clamp or grip the elongated optical component 150.

[0066] The elongated member holder 140 may include a protrusion 145 configured to hold the elongated member holder to the housing 105. The housing may include a protrusion gripping portion for gripping the protrusion 145 of the elongated member holder 140, thereby securing the holder 140 thereto.

[0067] The luminaire 100 may further comprise an optical foil 160. The optical foil is held between the elongated optical component 150 and the elongated component holder 140. The optical foil is configured to perform light diffusion of light passing from the second cavity 120 (via the elongated optical component 150) to the third cavity 130.

[0068] In particular, the optical foil is configured to perform light diffusion along the longitudinal direction of the elongated optical component, ie in a direction parallel to the extension of the elongated optical component.

[0069] Examples of suitable optical foils are well known in the art and may be formed from any suitable material such as polytetrafluoroethylene (PTFE). Typically, the surface or structure of the optical foil includes random or pseudo-random and periodically dispersed structures that scatter received light in a pseudo-random pattern, thereby diffusing light transmitted therethrough.

[0070] The elongated member holder 140 may include a reflective portion 144. This defines at least part of the boundary of the first cavity 110 and is configured to reflect the first light incident thereon. This reduces the amount of light absorbed by the walls or sides of the first cavity, increasing the amount of light in the first light beam output from the first cavity 110.

[0071] For example, the reflective portion 144 may also be configured to reflect the second light incident thereon, such as to retain the light within the elongated optical component 150 .

[0072] The reflective portion may be formed of a reflective material, for example. In some examples, the reflective portion is white, which improves the reflective properties of the reflective portion at a low material cost.

[0073] In some examples, the elongated member holder includes a scattering portion. The scattering portion also forms at least part of a boundary of the first cavity and is configured to scatter and / or diffuse the first light in the first cavity. This increases the diffusion of the light within the first cavity, so that the first light beam has a more uniform intensity distribution.

[0074] The scattering portion may be provided in place of or in addition to the previously described reflective portion. For example, the reflective portion 144 may be configured to both reflect and scatter / diffuse the first light in the first cavity.

[0075] In the illustrated example, the first light output window 111 comprises a sheet of translucent / transparent material. Examples of suitable materials are well known to those skilled in the art and include plastics and glass. The first light output window may be held between the elongated member holder 140 and the housing 105 .

[0076] In some examples, the first light output window 111 includes or is a light diffuser configured to diffuse the light output from the first light output window. This provides a light beam with a more uniform amplitude density.

[0077] As mentioned above, various properties of the luminaire 100 define the shapes of the first and second light beams, including for example the shape of the cavities 110 , 120 , 130 , the position and structure of the light emitting devices 115 , 125 and / or the shape of the light exit windows 111 , 131 .

[0078] In particular, the shape of the first cavity and / or the first light output window defines or controls the shape of the first light beam output from the first cavity.

[0079] The shape and / or position of the first edge 111A of the first light output window 111 defines a first cut-off location of the first light beam. The second edge 111B of the first light output window 111 defines a second cut-off location of the first light beam.

[0080] In the illustrated example, the second light output window 131 comprises a gap or slit in the third housing (i.e., is a space in the third housing). In this way, the shape of the third cavity (which defines the shape of the perimeter of the second light output window 131) and the beam shaping performed by the elongated optical component 150 define the shape of the second light beam.

[0081] In particular, a first edge 131A of the second light output window 131 (defined by the third cavity 130) defines a first cutoff location for the second light beam. A second edge 131B of the second light output window 131 (also defined by the third cavity) defines a second cutoff location for the second light beam.

[0082] The edges of the first and second light output windows may effectively act as shielding elements to define the edges or cut-off points of the light beam(s) output therethrough.

[0083] In this way, the spatial relationship between the first and the second light beam may be controlled by appropriate configuration of the luminaire, in particular by the edge(s) of the light output window(s).

[0084] To improve the uniformity of the second light beam, the second cavity 120 may include a reflective region 180 configured to receive and redirect light emitted by the second lighting device 125 that is not directly transmitted through the elongated member holder 140 to the elongated member 150 .

[0085] The luminaire 100 may further include additional circuitry 190. The additional circuitry may include a power supply and / or a driver for driving and / or controlling the lighting devices 115,125.

[0086] By way of example, the additional circuit 190 may include a power supply. The power supply is configured to generate power and / or provide power to the lighting device. For example, the power supply may convert a power signal received from the mains into a drive signal for (multiple) lighting devices. In some examples, the power supply may include an energy storage unit, such as a battery, for reserve or auxiliary power.

[0087] Other suitable component parts for additional circuitry (eg, control logic, etc.) are well known in the art and will be apparent to those skilled in the art.

[0088] The housing 105 may include a removable base element 107 that may be removed from the remainder of the housing. The removable base element may be configured to allow access to additional circuitry, such as for installation, maintenance, and / or repair.

[0089] In some examples, the first light exit window 111 is formed integrally with the elongated member holder 140. This increases the ease of manufacturing the luminaire 100.

[0090] Figure 2 An exploded view of the luminaire 100 is provided. For clarity of illustration, the lighting device has been omitted from this figure. Figure 2 The extension of the elongated optical component and the corresponding elongated component holder is more clearly illustrated.

[0091] Figure 2 Also illustrated is another optional component of the luminaire 100, namely an end cap 210. An end cap may be mounted to the end of the luminaire, for example, to prevent and / or limit sliding or movement of the elongated optical component 150 and / or the elongated component holder 140.

[0092] Figure 3 A luminaire installation 10 according to an embodiment is illustrated, comprising a luminaire 100 mounted on a ceiling 300 .

[0093] Figure 3 A further optional element of the luminaire is illustrated, namely a ceiling mount 310 which is configured for mounting the luminaire 100 to a ceiling 300 .

[0094] Figure 4 Illumination of a surface 400, such as a wall, by a first light beam and a second light beam is illustrated. A first illumination area 410 represents a portion of the surface illuminated by the first light beam, and a second illumination area 420 represents a portion of the surface illuminated by the second light beam.

[0095] As illustrated, the luminaire can be configured so that, when the luminaire is mounted to the ceiling via the ceiling mounting bracket, the first light beam output by the luminaire is higher than the second light beam output by the luminaire. In this way, the first light output window can be higher than the second light output window (when the luminaire is mounted to the ceiling via the ceiling mounting bracket).

[0096] It will be appreciated that the size of each illuminated area will depend in part on the distance and orientation of the illuminator relative to surface 400 .

[0097] That is, it has been explained before how the spatial relationship between the first light beam and the second light beam can be controlled by appropriate configuration of the luminaire, in particular by the edge(s) of the light output window(s). In particular, the spacing or overlap between the two light beams can be controlled or defined.

[0098] Preferably, the luminaire is configured so that there is a distinguishable overlap region 430, such as a boundary region or horizon between the first and second beams. This simulates a natural horizon or boundary for an improved user experience. This approach has been determined to give the observer a greater sense of spaciousness and well-being.

[0099] In particular, the overlapping area can create a gradient effect between the two light beams, so that one light beam appears to merge into the other light beam. This can be achieved by appropriate configuration and selection of various components of the luminaire, including the boundaries of the light exit window (e.g., edges 111A, 111B, 131A, 131B), the position of the light emitting devices 115, 125 and / or the structure / composition of the elongated optical element 150.

[0100] Therefore, the luminaire is preferably configured so that at least a portion (e.g., not less than 1%, not less than 5%, or not less than 10%) of each of the first illumination area 410 and the second illumination area 420 overlaps with the other of the first illumination area and the second illumination area. Preferably, no more than a predetermined percentage (e.g., no more than 20%, or no more than 10%, or no more than 5%) of each of the first illumination area 410 and the second illumination area 420 overlaps with the other of the first illumination area and the second illumination area.

[0101] This approach allows the use of luminaires to simulate different environmental conditions, depending on the color or other properties of the emitted light. For example, if the first light beam comprises blue light and the second light beam comprises green light, a distant land horizon can be simulated.

[0102] Preferably, the luminaire is configured so that the second illumination area has a sharp cut-off or boundary 450 at its lowermost portion. This can be achieved by appropriate configuration of the second light output window and / or appropriate positioning of the elongated optical component. In particular, the second light output window can be configured (e.g., appropriately shaped or appropriately spatially positioned) to define a distinguishable bottom edge of the second light beam.

[0103] In the context of this disclosure, a subset of a larger set or a plurality of items includes one or more (but not all) of the larger set.

[0104] Variations to the disclosed embodiments may be understood and effected by those skilled in the art in practicing the claimed invention based on a study of the drawings, the present disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality.

[0105] The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

[0106] If the term "suitable for" is used in the claims or description, it should be noted that the term "suitable for" is intended to be equivalent to the term "configured to". If the term "device" is used in the claims or description, it should be noted that the term "device" is intended to be equivalent to the term "system" and vice versa.

[0107] Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A luminaire for illuminating a surface with two light beams, the luminaire comprising: a first cavity accommodating a first illuminator for generating first light having first light characteristics, the first cavity comprising a first light output window for outputting the first light from the first cavity to outside the illuminator in the form of a first light beam; a second cavity housing a second illumination device for generating a second light having a second different light characteristic; an elongated optical component configured to perform beam shaping on light provided to the elongated optical component; an elongated component holder configured to hold the elongated optical component and to form at least a portion of a boundary of the first cavity and at least a portion of a boundary of the second cavity, wherein the elongated component holder is configured to: preventing or limiting not less than 90% of the first light from passing from the first cavity to the elongated optical member; and allowing second light to pass from the second cavity to the elongated optical member; and a third cavity at least partially defined by the elongated optical component and configured to receive the beam-shaped second light from the elongated optical component, the third cavity comprising a second light output window for outputting the beam-shaped second light from the third cavity to the outside of the illuminator in the form of a second light beam, Wherein the elongated component holder includes a translucent or transparent portion, the translucent or transparent portion defining at least part of a boundary of the second cavity and configured to allow light to pass from the second cavity to the elongated optical component.

2. The luminaire according to claim 1, wherein: The cross-sectional shape of the elongated optical component comprises an arc; and The elongated component holder includes a retaining portion having an arcuate cross-sectional area for retaining the elongated optical component at the arcuate cross-sectional shape of the elongated component holder.

3. A luminaire according to claim 1 or 2, wherein the translucent or transparent portion of the elongated component holder is configured to diffuse light passing from the second cavity to the elongated optical component.

4. A luminaire according to any one of claims 1 to 3, further comprising an optical foil held between the elongated optical component and the elongated component holder for performing linear diffusion of light.

5. A luminaire according to any one of claims 1 to 4, wherein the elongated member holder comprises a reflective portion defining at least part of a boundary of the first cavity and configured to reflect the first light incident thereon.

6. A luminaire according to any one of claims 1 to 5, wherein the elongated member holder comprises a scattering portion defining at least part of a boundary of the first cavity and configured to scatter and / or diffuse the first light in the first cavity.

7. A luminaire according to any one of claims 1 to 6, wherein the elongated member holder is configured to prevent light from passing from the elongated optical member to the first cavity.

8. The luminaire according to any one of claims 1 to 7, wherein the first light output window and the second light output window are configured to define a distinguishable boundary between the first light beam and the second light beam.

9. A luminaire according to any one of claims 1 to 8, wherein said second light output window is configured to define a distinguishable bottom edge of said second light beam.

10. The luminaire according to any one of claims 1 to 9, further comprising a ceiling mounting bracket configured to mount the luminaire to a ceiling.

11. The luminaire according to claim 10, wherein when the luminaire is mounted to the ceiling via the ceiling mounting bracket, a first light beam output by the luminaire is higher than a second light beam output by the luminaire.

12. A luminaire according to any one of claims 1 to 11, wherein: The first lighting device comprises a first group of one or more LEDs; and The second lighting device includes a second group of one or more LEDs.

13. A luminaire according to any one of claims 1 to 12, wherein the first light has a different color and / or color temperature than the second light.

14. A luminaire according to any one of claims 1 to 13, wherein the elongated component holder is an extruded elongated component holder, being a component holder produced using an extrusion process.

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