CN116601432A - Lighting device with upward illumination using adjustable optics - Google Patents

Abstract

The illumination device (100) may include a plurality of light sources (170) that emit light along a range of radiation paths (195). The lighting device (100) may further comprise a reflective member (130-1), the reflective member (130-1) being arranged in the vicinity of at least a part of the first side inner surface in a first part (195-2) of the range of the radiation path (195), wherein light in the first part (195-2) of the range of the radiation path (195) is reflected off the reflective member (130-1). The lighting device (100) may further comprise a housing (105) having an optical structure (120) adjacent to the reflective member (130-1), wherein after reflection off the reflective member (130-1) light in a first portion (195-2) of the range of the radiation path (195) passes through the optical structure (120) into a first portion (140-2) of the surrounding environment (140). The reflective member (1301) may be adjacent to an opening through which a second portion (195-1) of the extent of the radiation path (195) passes into a second portion (140-1) of the surrounding environment (140).

Description

Lighting device with upward illumination using adjustable optics

Technical Field

The present disclosure relates generally to lighting devices, and more particularly to systems, methods, and devices for lighting devices with upward illumination accomplished with adjustable optics.

Background

Many different types of lighting devices, such as linear lights, use blinds, other optical structures, and/or no optical structures for downward illumination. Such lighting devices are typically suspended from some structure (e.g., ceiling, overhang, beam) a distance such that there is a physical separation between the structure and the lighting device. Since such lighting devices are suspended from the structure, there is an opportunity to provide both upward and downward illumination.

Disclosure of Invention

In summary, in one aspect, the present disclosure is directed to a lighting device comprising a housing having a plurality of walls forming a cavity, wherein the walls comprise an optical structure. The illumination device may further include a plurality of light sources that emit light into the cavity along a range of radiation paths, wherein the range of radiation paths includes the first portion and the second portion. The lighting device may further comprise a plurality of louvers arranged at a first position within the cavity, wherein the first position is in a first portion of the range of the radiation path, wherein light in the first portion of the range of the radiation path passes through the louvers into a first portion of the ambient environment. The illumination device may further comprise a reflective member disposed at a second location within the cavity, wherein the second location is in a second portion of the range of the radiation path, wherein light in the second portion of the range of the radiation path is reflected off the reflective member. The lighting device may further comprise a plurality of adjustable optical devices at least partially surrounding the plurality of light sources, wherein the plurality of adjustable optical devices comprises two or more optics/lens portions coupled to form the plurality of adjustable optical devices providing a predetermined light distribution. After reflection off the reflective component, light in a second portion of the range of the radiation path may pass through the optical structure into a second portion of the surrounding environment. The second portion of the ambient environment may be elevated relative to the first portion of the ambient environment.

In another aspect, the present disclosure is directed to a lighting device comprising a housing having a plurality of walls forming a cavity, wherein the walls comprise an optical structure. The illumination device may further include a plurality of light sources that emit light into the cavity along a range of radiation paths, wherein the range of radiation paths of light includes the first portion and the second portion. The lighting device may further comprise a reflective member disposed at a first position in the cavity within a first portion of the range of the radiation path of the light, wherein the light in the first portion of the range of the radiation path is reflected off the reflective member towards the optical structure and subsequently passes through the optical structure into a first portion of the surrounding environment. Light in a second portion of the range of the radiation path may pass through the opening at the second location in the cavity into a second portion of the ambient environment. The first portion of the ambient environment may be elevated relative to the second portion of the ambient environment.

In yet another aspect, the present disclosure is directed to an assembly for upward illumination of an illumination device, wherein the assembly for upward illumination may include an optical structure integrated with a housing of the illumination device. The upwardly illuminating assembly may further comprise a reflective member disposed at a location within a cavity formed by the housing of the lighting device, wherein the location is near a side inner surface of the housing. The reflective component may be positioned at an acute angle relative to the optical component. The reflective member may be configured to be disposed adjacent to an opening located at a second position in the cavity of the housing, wherein a portion of the light emitted by the light source of the lighting device passes through the opening into a first portion of the ambient environment. The reflective member may be configured to reflect at least some of the remaining portion of the light emitted by the light source of the lighting device. The optical structure may be configured to allow at least some of the remaining portion of the light to pass therethrough into a second portion of the ambient environment, wherein the second portion of the ambient environment is elevated relative to the first portion of the ambient environment.

These and other aspects, objects, features and embodiments will be apparent from the following description and appended claims.

Drawings

The drawings illustrate only exemplary embodiments and are therefore not to be considered limiting in scope, for the exemplary embodiments may admit to other equally effective embodiments. The elements and features illustrated in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the exemplary embodiments. In addition, beam tunable optics are used to provide desired optical effects, such as wide beams, narrow beams, skewed beams, and the like. In addition, certain dimensions or locations may be exaggerated to help visually convey such principles. In the drawings, reference numerals designate identical or corresponding elements, but not necessarily identical elements.

Fig. 1A-1C illustrate various views of a lighting device according to certain exemplary embodiments.

Fig. 2 shows the extent of the radiation path of the light source of the lighting device of fig. 1A to 1C.

Fig. 3 illustrates another lighting device according to some example embodiments.

Fig. 4 illustrates yet another lighting device according to some example embodiments.

Fig. 5 illustrates yet another lighting device according to some example embodiments.

Fig. 6-14 illustrate beam-tunable optics according to certain example embodiments.

Detailed Description

In summary, exemplary embodiments provide systems, methods, and devices for a lighting device with upward illumination. Exemplary embodiments may provide a number of benefits. Such benefits may include, but are not limited to: the more efficient and effective light distribution of the lighting device, easier maintenance, smaller footprint and flexible features. The exemplary embodiments may be used with new lighting devices (e.g., luminaires, fixtures) or retrofitted with existing lighting devices. The exemplary illumination devices discussed herein with upward illumination may be used with any of a number of different types of illumination devices, including but not limited to linear fixtures, channel fixtures, and round fixtures. The illumination devices discussed herein provide general illumination. The lighting device with upward illumination may be located in any one or more of a plurality of environments. Examples of such environments may include, but are not limited to: indoor, outdoor, commercial, industrial, educational, retail, residential, healthcare applications, office space, manufacturing plants, bathrooms, closets, kitchens, restrooms, warehouses and storage facilities (climate controlled and climate controlled).

An exemplary lighting device with upward illumination (including its components) may be made of one or more of a number of suitable materials to allow the lighting device to meet certain criteria and/or regulations while also maintaining durability under one or more conditions under which the lighting device and/or other associated components of the lighting device may be exposed. Examples of such materials may include, but are not limited to, aluminum, stainless steel, fiberglass, glass, plastic, ceramic, and rubber. Additionally or alternatively, one or more components of an exemplary illumination device having upward illumination may have a particular coating (e.g., a reflective coating).

The example lighting devices described herein, or portions thereof, may be made from a single component (e.g., made by a mold, injection mold, die casting, or extrusion process). Additionally or alternatively, the exemplary lighting device (or portions thereof) may be made of multiple components mechanically coupled to one another. In this case, the plurality of members may be mechanically coupled to each other using one or more of a plurality of coupling methods including, but not limited to: epoxy, welding, fastening means, compression fit, mating threads, snap fit and grooved fit. One or more components mechanically coupled to each other may be coupled to each other in one or more of a variety of ways, including, but not limited to: fixed, hinged, detachable, slidable and threadably connectable.

Components and/or structures described herein may include elements described as coupled, fastened, secured, abutted, in communication, or other similar terms. Such terms are intended merely to distinguish between various elements and/or structures within a component or device and are not intended to limit the ability or function of the particular element and/or structure. For example, structures described as "coupled structures" may be fixed, fastened, abutted, and/or perform other functions in addition to physical coupling.

The coupling structures (including complementary coupling structures) as described herein may allow one or more components and/or portions of an exemplary lighting device to be directly or indirectly coupled to some other component of the lighting device. The coupling structure may include, but is not limited to: clamps, a portion of the hinge, holes, recessed areas, protrusions, holes, slots, tabs, pawls, and mating threads. One portion of an exemplary lighting device may be coupled to some other component of the lighting device through the direct use of one or more coupling structures.

Additionally or alternatively, a portion of the exemplary lighting device may be coupled to the lighting device or some other component of the lighting device using one or more independent devices that interact with one or more coupling structures disposed on the component of the lighting device. Examples of such devices may include, but are not limited to: pins, hinges, fastening devices (e.g., bolts, screws, rivets), epoxy, glue, adhesive, and springs. One coupling structure described herein may be the same as or different from one or more other coupling structures described herein. A complementary coupling structure as described herein may be a coupling structure that is mechanically coupled, directly or indirectly, to another coupling structure.

In the foregoing figures, which illustrate exemplary embodiments of a lighting device with upward illumination, one or more of the illustrated components may be omitted, repeated, and/or replaced. Thus, exemplary embodiments of lighting devices with upward illumination should not be considered limited to the specific arrangement of components shown in any of the figures. For example, features illustrated in one or more figures or described with respect to one embodiment may be applied to another embodiment associated with a different figure or description.

In certain exemplary embodiments, the lighting devices described herein are subject to meeting certain criteria and/or requirements. For example, national Electrical Code (NEC), national Electrical Manufacturers Association (NEMA), international Electrotechnical Commission (IEC), federal Communications Commission (FCC), energy star program of the Environmental Protection Agency (EPA), lamp design consortium (DesignLights Consortium, DLC), underwriters laboratories (Underwriters Laboratories, UL), and Institute of Electrical and Electronics Engineers (IEEE) set standards for electrical accessories, wiring, and electrical connections. When applicable, use of the exemplary embodiments described herein meets (and/or allows the lighting device to meet) such criteria.

If a component of a drawing is described but not explicitly shown or labeled in the drawing, a label for the corresponding component in another drawing may be inferred as the component. Conversely, if a component in a figure is labeled but not described, the description of such component may be substantially the same as the description of the corresponding component in another figure. The numbering scheme for the various components in the figures herein is as follows: each component is a three-digit number and corresponding components in the other figures have the same last two digits.

In addition, the statement that a particular embodiment (e.g., as shown in the figures herein) does not have particular structure or components does not mean that the embodiment cannot have such structure or components unless explicitly stated. For example, structures or components described as not being included in the exemplary embodiments illustrated by one or more particular drawings can be included in one or more claims corresponding to the one or more particular drawings herein for purposes of the present or future claims herein.

Exemplary embodiments of lighting devices with upward illumination will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of lighting devices with upward illumination are shown. However, the lighting device with upward illumination may be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of lighting devices with upward illumination to those skilled in the art. Similarly, and not necessarily identically, elements (sometimes referred to as components) in each figure are indicated by the same reference numerals to facilitate consistency.

The terms "first," second, "" upper, "" lower, "" inner, "" outer, "" distal, "" proximal, "" end, "" top, "" bottom, "" side, "" front, "" back, "and" within … … (if present) are used merely to distinguish one component (or a portion of a component or a state of a component) from another component. These terms are not intended to indicate a preference or a particular orientation. These terms are not intended to limit embodiments of lighting devices having upward illumination. In the following detailed description of exemplary embodiments, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known features have not been described in detail so as not to unnecessarily complicate the description.

Fig. 1A-1C illustrate various views of a lighting device 100 according to certain exemplary embodiments. Specifically, fig. 1A shows an isometric view of the top front side of the lighting device 100. Fig. 1B shows a front view of the lighting device 100 without one of the end caps 110 (specifically, end cap 110-1). Fig. 1C shows a cross-sectional side view of the lighting device 100. The lighting device 100 of fig. 1A-1C is in the form of a linear luminaire comprising a plurality of sections. For example, the lighting device 100 of fig. 1A-1C includes a housing 105 having a top wall 106, two side walls 108 (side wall 108-1 and side wall 108-2), an intermediate wall 109, two end caps 110 (end caps 110-1 and 110-2), and optionally two bottom walls 107 (bottom wall 107-1 and bottom wall 107-2). All of these walls of housing 105 may be referred to herein as having housing walls.

The lighting device 100 is disposed in an ambient environment 140, more specifically, the ambient environment 140 has a plurality of portions adjacent to different components of the lighting device 100. In this case, ambient portion 140-1 is disposed adjacent bottom surface 152 of optional louver 150, ambient portion 140-2 is disposed adjacent optical structure 120-1, and ambient portion 140-3 is disposed adjacent optical structure 120-2. In this case, ambient portion 140-2 and ambient portion 140-3 are elevated relative to ambient portion 140-1.

In certain exemplary embodiments, the lighting device 100 includes one or more optical structures 120 integrated with one or more portions of the housing 105. Examples of optical structure 120 may include (but are not limited to): diffusers, prismatic lenses, polycarbonate lenses, and unobstructed openings in one or more walls (e.g., side wall 108) of the housing. In this case, there are two optical structures 120. The optical structure 120-1 is integrated with the side wall 108-1 of the housing 105 at the distal half of the housing (beginning at the intermediate wall 109 of the housing 105), and the optical structure 120-2 is integrated with the side wall 108-2 of the housing 105 at the distal half of the housing. In alternative embodiments, the housing 105 may have only one optical structure 120 or three or more optical structures 120 integrated therewith.

In this case, bottom wall 107 is used to help secure optical structure 120 and louver 150. Specifically, bottom wall 107-1 is used (e.g., via one or more coupling structures (e.g., clips, grooves, slots, detents, fastening devices)) to secure a bottom edge of optical structure 120-1 and at least one surface (e.g., vertical side surface 153-1, bottom surface 152) of blind 150. Similarly, bottom wall 107-2 is used to secure the bottom edge of optical structure 120-2 and at least one surface (e.g., vertical side surface 153-2, bottom surface 152) of blind 150. In addition, end cap 110-1 may be used (e.g., via one or more coupling structures (e.g., clips, grooves, slots, detents, fastening devices)) to help secure optical structure 120-2 and the ends of optical structure 120-1. Similarly, end caps 110-2 are used to help secure optical structure 120-2 and the opposite ends of optical structure 120-1.

In this case, optical structures 120-1 and 120-2 are continuous along the entire length of housing 105. In alternative embodiments, one or more of the optical structures 120 may have a length and/or width that is less than the total length and width of the wall (e.g., side wall 108-1) of the housing 105 on which the optical structures 120 are integrated. Further, in this case, optical structures 120-1 and 120-2 have a thickness greater than the thickness of sidewalls 108-1 and 108-2, respectively. The optical structure 120 may have any of a variety of shapes when viewed from above, including but not limited to rectangular (as in this case), circular, oval, triangular, hexagonal, and random shapes.

In this case, the optical structures 120-1 and 120-2 are flat along their length, width and height, respectively. In alternative embodiments, the optical structure 120 may be non-flat (e.g., have curvature; have variable thickness along its length, width, and/or height) in one or more of its dimensions. Each optical structure 120 is configured to allow light emitted by the light source 170 to pass therethrough. The optical structure 120 may (partially) reflect light and/or refract light. The optical structure 120 may be transparent, translucent, semi-transmissive, and/or have some other type of light transmission characteristic. The optical structure 120 can have uniform or variable features (e.g., spots, etches, feature deletions, refractive elements, coloration) along its length, width, and/or height.

The side walls 108, top wall 106, intermediate wall 109, and end cap 110 of the housing 105 form an enclosed cavity 160, and one or more components (e.g., driver, battery, controller, sensing device) of the lighting device 100 may be housed within the enclosed cavity 160. In some cases, as shown in fig. 3 below, the cavity 160 and at least some of the walls used to form the cavity 160 may be removed from the housing 105. The housing 105 may also include another cavity 190, which cavity 190 is open (at least at the bottom) and has multiple portions (e.g., cavity portion 190-1, cavity portion 190-2, cavity portion 190-3).

One or more light sources 170 may be disposed on a bottom surface of the intermediate wall 109 of the housing 105 (and thus disposed within the cavity 190). In this case, there are four separate rows of light sources 170, with each row having a plurality of light sources 170. In alternative embodiments, the light sources 170 may be arranged in any of a number of other configurations (e.g., concentric circles, randomly, a plurality of clustered groups). The light source 170 may use any of a number of different illumination techniques, including, but not limited to: light Emitting Diodes (LEDs), incandescent bulbs, fluorescent bulbs and halogen bulbs. When the light source 170 is an LED, the light source 170 may utilize any type of LED technology, including, but not limited to, chip-on-board and surface mount diodes.

Alternatively, the illumination device 100 may include one or more optical devices 180, in which case there are four optical devices 180 (also located within the cavity 190), one for each row of light sources 170. These optical devices 180 are disposed against or near the bottom surface of the intermediate wall 109 of the housing 105 and at least partially surround the light source 170 such that substantially all light emitted by the light source 170 passes through the optical devices 180. When the illumination device 100 includes one or more optical devices 180, the light emitted by the light source 170 may be refracted and/or otherwise manipulated (e.g., change color) within the cavity 190 before exiting the cavity 190. In the absence of optional optics 180, light emitted by light source 170 travels within cavity 190 without manipulation before reaching reflector 130 (also referred to herein as reflective member 130), optical structure 120, and/or louver 150.

In this case, there are a plurality of louvers 150 provided in the cavity portion 190-1 of the cavity 190, which are provided at the bottom (open end) of the cavity 190. One louver 150 may be configured (e.g., length, height, thickness, cross-sectional shape, orientation, material, translucency, texture, color) the same as or different from one or more of the other louvers 150. And the spacing between adjacent louvers 150 (e.g., 1 inch, 2 cm) may be uniform or variable throughout. One or more of the louvers 150 may be fixed, adjustable, and/or replaceable. In this case, all of the louvers 150 are identically configured with respect to one another, are arranged parallel to one another, and are secured within the cavity portion 190-1.

Each louver 150 of fig. 1A-1C has a top surface 151 and a bottom surface 152 that are planar and parallel to each other. The bottom surface 152 of each louver 150 has a greater length than the length of the top surface 151 of the louver 150. The top surface 151 of each louver 150 is vertically centered with respect to the bottom surface 152 of the louver 150. There is a small vertical side surface 153 extending upward from each end of the bottom surface 152 of the louver 150, with the vertical side surface 153-1 extending upward from one end of the bottom surface 152 and the vertical side surface 153-2 extending upward from the other end of the bottom surface 152. There is also a beveled side surface 154 extending from the top of each vertical side surface 153 to the end of the top surface 151. In this case, the inclined side surface 154-1 extends from the top of the vertical side surface 153-1 to one end of the top surface 151, and the inclined side surface 154-2 extends from the top of the vertical side surface 153-2 to the other end of the top surface 151. When the thickness of the louver 150 is small, various surfaces (e.g., the top surface 151) of each louver 150 have a small width.

In certain exemplary embodiments, the lighting device 100 includes one or more reflective members 130. Each reflective member 130 is configured to reflect at least some light directed thereto. In this case, there are two reflective members 130, wherein reflective member 130-1 is positioned adjacent to optical structure 120-1 in cavity portion 190-2 of cavity 190. And wherein the reflective member 130-2 is positioned adjacent to the optical structure 120-2 in the cavity portion 190-3 of the cavity 190. In some cases, as in this example, optical structures 120 may be disposed on the surface of some or all of louvers 150 (in this case, on beveled side surfaces 154). Specifically, in this case, the optical structure 120 coincides with (abuts against) the inclined side surfaces 154 of all of the louvers 150. Alternatively, optical structures 120 may be positioned near one or more of louvers 150, but not actually touching one or more of louvers 150.

Each of the reflective members 130 may be made of and/or coated with a reflective material that reflects light emitted by the light source 170. The reflective characteristics may be part of the outer surface and/or inner surface of the reflective member 130. In some cases, the reflective component 130 reflects all light directed toward it. In some other cases, the reflective member 130 may additionally or alternatively be made of a material that allows some light directed toward the reflective member 130 to be transmitted (e.g., refracted) therethrough while the remainder of the light is reflected from the reflective member 130. As yet another alternative, one or more portions of the reflective member 130 may allow light directed thereto to pass therethrough (with or without any reflection) while other portions of the reflective member 130 reflect light directed thereto.

In some cases, if the optical structure 120 is a physical component (i.e., not just an opening in the wall of the housing 105), the optical structure 120 and associated reflective component 130 may be part of a single extruded member or separate members coupled to each other. In other alternative embodiments, the reflective component 130 may be part of a single extruded member having a portion of the housing 105, or may be a separate member coupled to a portion of the housing 105.

Further, each reflective member 130 (or portion thereof) may have a particular orientation within cavity 190 relative to one or more other members of illumination device 100. The reflective member 130 may be integral (e.g., by extrusion) with a portion of the housing 105 (e.g., the bottom wall 107). Alternatively, the reflective member 130 may be a separate component (e.g., an insert) disposed on and/or coupled to a portion of the housing 105. Hereinafter, as shown in fig. 2, the purpose of the orientation of each reflective member 130 is to redirect some of the light emitted by the light source 170 to the nearby optical structure 120 for upward illumination.

For example, as shown in FIG. 1B, reflective member 130-1 forms an angle 135-1 with the extension of top surface 151 of louver 150 that is also equal to the angle between reflective member 130-1 and bottom surface 152 of louver 150 because top surface 151 and bottom surface 152 of louver 150 are parallel to each other. Similarly, reflective member 130-2 forms an angle 135-2 with the extension of top surface 151 of louver 150 that is also equal to the angle between reflective member 130-2 and bottom surface 152 of louver 150.

Because of the particular configuration of blind 150 in this case, angle 135-1 is equal to angle 135-2, as described above. In alternative embodiments, when two reflective members 130 are present, angle 135-1 and angle 135-2 may differ from each other based on one or more of any number of factors, including, but not limited to: the configuration of the louvers 150, the relative position of the light sources 170, the presence and nature of the optical device 180, and the configuration of the reflective member 130. The angle 135 may be fixed. Alternatively, the angle 135 may be adjustable, for example, based on the configuration of a coupling structure for coupling the reflective member 130 and the bottom wall 107 of the housing 105 to each other.

When the lighting device 100 includes a plurality of reflective members 130, in which case one reflective member may have the same or different corresponding characteristics (e.g., material, coating, shape, size, orientation with respect to nearby optical structure 120, orientation with respect to light source 170) as one or more of the other reflective members 130. In this example, the characteristics of the reflective member 130-1 are substantially similar to the corresponding characteristics of the reflective member 130-2.

Each reflective element 130 may also have a particular orientation in its portion of cavity 190 relative to nearby optical structures 120, for example, in which case reflective member 130-1 forms an angle 137-1 with optical structure 120-1 and reflective member 130-2 forms an angle 137-2 with optical structure 120-2. Those skilled in the art will appreciate that other angles may be established between the reflective component 130 of the lighting device 100 and another component (or portion thereof) to define the orientation of the reflective component 130 and/or another component (e.g., the optical structure 120) of the lighting device 100. In some cases, the angle 137 may be fixed. Alternatively, the angle 137 may be adjustable, for example, based on the configuration of a coupling structure for coupling the reflective member 130 and the bottom wall 107 of the housing 105 to each other. In this example, angles 137-1 and 137-2 are fixed acute angles to encourage light reflected off of reflective component 130 to be directed through optical structure 120.

As shown in fig. 2 below, the angle 135 formed between the reflective member 130 and a portion of the louver 150 and the angle 137 formed between the reflective member 130 and the nearby optical structure 120 are designed to direct some of the light emitted by the light source 170 into a surrounding portion (e.g., surrounding portion 140-2, surrounding portion 140-3) that is elevated relative to the surrounding portion 140-1 (for upward illumination), wherein other light emitted by the light source 170 is directed (for downward illumination).

Fig. 2 illustrates the extent of the radiation path 195 of the light source 170 of the illumination device 100 of fig. 1A-1C. Fig. 2 illustrates a portion of fig. 1B, which is a front view of the lighting device 100 without the end cap 110-1. Referring to fig. 1A-2, the extent of the radiation path 195 is shown as emanating from a row of light sources 170 closest to the sidewall 108-1 and the optical structure 120-1. The optical device 180 disposed near the light source 170 does not have any refractive characteristics. As a result, the extent of the radiation path 195 that travels through the optical device 180 is unchanged when entering the cavity 190 of the housing 105.

After traveling through the optical device 180, a portion 195-1 (e.g., a first portion) of the range of the radiation path travels through the cavity portion 190-1, through the louvers 150, and into the ambient portion 140-1 to provide downward illumination. Another portion 195-2 (e.g., a second portion) of the range of the radiation path, after traveling through the optical device 180, travels through the cavity portion 190-2, reflects off the reflective member 130-1, passes through the optical structure 120-1, and into the ambient portion 140-2 to provide upward illumination. With respect to the extent of radiation path 195-2, some radiation passes directly through optical structure 120-1 after reflecting off reflective element 130-1, while some of the other radiation internally reflects off of a plurality of inner surfaces (e.g., reflective element 130-1, bottom wall 107-1, bottom surface of intermediate wall 109) and into ambient portion 140-2 before passing through optical structure 120-1.

The extent of the radiation path 195 for light emitted by the light sources 170 of the other rows may similarly have different portions, wherein some portions of the extent of the radiation path 195 pass through the louvers 150 to radiate into the ambient portion 140-1, and wherein other portions of the extent of the radiation path 195 reflect off the reflective member 130 (in this case, the reflective member 130-1 or the reflective member 130-2) at least once and into the ambient portion 140 (the ambient portion 140-2 or the ambient portion 140-3) before passing through the optical structure 120 (in this case, the optical structure 120-1 or the optical structure 120-2), the ambient portion 140 (the ambient portion 140-2 or the ambient portion 140-3) being elevated relative to the ambient portion 140-1.

The extent of radiation path 195 produced by light source 170 positioned closer to the center of illumination device 100 (based on the front view provided in fig. 1B and 2) tends to travel to ambient portion 140-1 instead of ambient portion 140-2 or ambient portion 140-3, while the extent of relatively more radiation path 195 produced by light source 170 positioned closer to each side of illumination device 100 (based on the front view provided in fig. 1B and 2) tends to travel to ambient portion 140-2 or ambient portion 140-3 instead of ambient portion 140-1.

Fig. 3 illustrates another lighting device 300 according to some example embodiments. Specifically, fig. 3 shows an isometric view of the bottom front side of the lighting device 300. Referring to fig. 1A-3, the lighting device 300 of fig. 3 and its various components are substantially identical to the lighting device 100 of fig. 1A-2 and its corresponding components except as described below. Specifically, although the lighting device 300 is a linear light fixture, the housing 305 of the lighting device 300 of fig. 3 lacks an upper portion (e.g., side wall 108, top wall 106, cavity 160) that is part of the lighting device 100 of fig. 1A-2. Components (e.g., driver, battery) of the lighting device 100 disposed in the cavity 160 may be located remotely from the housing 305 of fig. 3 and/or integrated with the light source of the lighting device 300. In either case, the equivalent of the intermediate wall 109 of the lighting device 100 of fig. 1A-2 becomes the top wall (hidden in the view of fig. 3) of the lighting device 300.

The optical structure 320-1 serves as one side wall of the housing 305 of the lighting device 300, and the optical structure 320-2 serves as an opposite side wall of the housing 305 of the lighting device 300. In this case, the optical structure 320 is a transparent lens. The lighting device 300 of fig. 3 also lacks the bottom wall 107 of the housing 105 of the lighting device 100 of fig. 1A-2. Accordingly, the optical structure 320 of fig. 3 may be configured to be directly coupled to one or more surfaces of the blind 350.

The lighting device 300 of fig. 3 is in the form of another linear luminaire comprising a plurality of parts. For example, the lighting device 300 of fig. 3 includes a housing 305 having a top wall (hidden from view), two end caps 310 (end cap 310-1 and end cap 310-2), and two optical structures 320 (optical structures 320-1 and 320-2). The lighting device 300 is disposed in an ambient environment 340 having a plurality of sections (in this case, ambient section 340-1, ambient section 340-2 and ambient section 340-3). Ambient portion 340-1 is disposed adjacent to louver 350, ambient portion 340-2 is disposed adjacent to optical structure 320-1, and ambient portion 340-3 is disposed adjacent to optical structure 320-2. In this case, ambient portion 340-2 and ambient portion 340-3 are elevated relative to ambient portion 340-1.

The process of distributing the various portions of the range of the radiation path within the cavity 390 for light emitted by the light source of the illumination device 300 of fig. 3 is substantially the same as the process of distributing the various portions of the range of the radiation path 195 within the cavity 190 for light emitted by the light source 170 of the illumination device 100 as set forth above with respect to fig. 2.

Fig. 4 illustrates yet another lighting device 400, according to some example embodiments. Specifically, fig. 4 shows a front view of lighting device 400 without a front end cap (which would be labeled element 410-1). Referring to fig. 1A-4, the lighting device 400 of fig. 4 and its various components are substantially identical to the lighting device 100 of fig. 1A-2 and its corresponding components, except as described below. Specifically, the illumination device 400 of fig. 4 lacks any one of the optical devices 180 of the illumination device 100 of fig. 1A-2.

The lighting device 400 of fig. 4 is in the form of a linear luminaire having a housing 405 with a top wall 406, two side walls 408 (side wall 408-1 and side wall 408-2), an intermediate wall 409, two end caps 410 (having only end cap 410-2 shown in fig. 4) and two bottom walls 407 (bottom wall 407-1 and bottom wall 407-2). The lighting device 400 is disposed in an ambient environment 440. More specifically, the ambient environment 440 has portions adjacent to the different components of the lighting device 400. In this case, ambient portion 440-1 is disposed adjacent to bottom surface 452 of blind 450, ambient portion 440-2 is disposed adjacent to optical structure 420-1, and ambient portion 440-3 is disposed adjacent to optical structure 420-2. In this case, ambient portion 440-2 and ambient portion 440-3 are elevated relative to ambient portion 440-1.

The lighting device 400 comprises two optical structures 420. Optical structure 420-1 is integrated with side wall 408-1 of housing 405 at the distal half of the housing (beginning at intermediate wall 409 of housing 405) and optical structure 420-2 is integrated with side wall 408-2 of housing 405 at the distal half of the housing. The bottom wall 407 is used to help secure the optical structure 420 and the blind 450. Specifically, bottom wall 407-1 is used to secure the bottom edge of optical structure 420-1 and at least one surface (e.g., vertical side surface 453-1, bottom surface 452) of blind 450. Similarly, bottom wall 407-2 is used to secure the bottom edge of optical structure 420-2 and at least one surface (e.g., vertical side surface 453-2, bottom surface 452) of blind 450. In addition, end cap 410 may be used (e.g., via one or more coupling structures (e.g., clips, grooves, slots, detents, fastening devices)) to help secure the ends of optical structures 420-1 and 420-2.

In this case, optical structures 420-1 and 420-2 are continuous along the entire length of housing 405. Further, in this case, optical structures 420-1 and 420-2 have a thickness that is greater than the thickness of sidewalls 408-1 and 408-2, respectively. In this case, optical structures 420-1 and 420-2 are flat along their length, width and height, respectively.

The side walls 408, top wall 406, intermediate wall 409, and end caps 410 of the housing 405 form an enclosed cavity 460 within which one or more components (e.g., driver, battery, controller, sensing device) of the lighting device 400 may be housed. The housing 405 also includes another cavity 490, which is open (at least at the bottom) and has multiple portions (e.g., cavity portion 490-1, cavity portion 490-2, cavity portion 490-3). One or more light sources 470 may be disposed on a bottom surface of intermediate wall 409 of housing 405 (and thus disposed within cavity 490). In this case, there are four separate rows of light sources 470, with each row having a plurality of light sources 470.

In the cavity portion 490-1 of the cavity 490, a plurality of louvers 450 are provided, which are provided at the bottom (open end) of the cavity 490. In this case, all of the louvers 450 are identically configured with respect to one another, arranged parallel to one another, and secured within the cavity portion 490-1. Each louver 450 of fig. 4 has a top surface 451 and a bottom surface 452, the top surface 451 and the bottom surface 452 being flat and parallel to each other. The bottom surface 452 of each louver 450 has a greater length than the length of the top surface 451 of the louver 450. The top surface 451 of each louver 450 is vertically centered with respect to the bottom surface 452 of the louver 450. There is a small vertical side surface 453 extending upward from each end of the bottom surface 452 of the louver 450, with the vertical side surface 453-1 extending upward from one end of the bottom surface 452 and the vertical side surface 453-2 extending upward from the other end of the bottom surface 452. There is also a beveled side surface 454 extending from the top of each vertical side surface 453 to the end of top surface 451. In this case, the sloped side surface 454-1 extends from the top of the vertical side surface 453-1 to one end of the top surface 451, and the sloped side surface 454-2 extends from the top of the vertical side surface 453-2 to the other end of the top surface 451.

The illumination device 400 of fig. 4 includes two reflective members 430, wherein the reflective member 430-1 is positioned adjacent to the optical structure 420-1 in the cavity portion 490-2 of the cavity 490, and wherein the reflective member 430-2 is positioned adjacent to the optical structure 420-2 in the cavity portion 490-3 of the cavity 490. Each reflective member 430 coincides with (abuts against) the inclined side surfaces 454 of all of the louvers 450. The orientation of each reflective member 430 redirects some of the light emitted by light source 470 toward nearby optical structure 420 for upward illumination.

The reflective member 430-1 forms an angle 435-1 with the extension of the top surface 451 of the blind 450 that is also equal to the angle between the reflective member 430-1 and the bottom surface 452 of the blind 450 because the top surface 451 and the bottom surface 452 of the blind 450 are parallel to each other. Similarly, the reflective member 430-2 forms an angle 435-2 with the extension of the top surface 451 of the blind 450 that is also equal to the angle between the reflective member 430-2 and the bottom surface 452 of the blind 450. In this case, angle 435-1 is equal to angle 435-2.

In this case, reflective member 430-1 forms an angle 437-1 with optical structure 420-1 and reflective member 430-2 forms an angle 437-2 with optical structure 420-2. In this example, angles 437-1 and 437-2 are acute angles to encourage light reflected off of reflective component 430 to be directed through nearby optical structure 420.

Fig. 5 illustrates yet another lighting device 500, according to some example embodiments. In particular, fig. 5 shows a front cross-sectional view of a lighting device 500. Referring to fig. 1A-5, the lighting device 500 of fig. 5 and its various components are substantially identical to the lighting device of fig. 1A-4 and its corresponding components, except as discussed below. For example, the lighting device 500 of fig. 5 is a circular luminaire with a single reflective member 530, a single optical structure 520, and no louvers. Alternatively, the lighting device 500 of fig. 5 may be a linear luminaire having at least two reflective members 530, at least two optical structures 520, and no louvers.

The lighting device 500 of fig. 5 has a housing 505, the housing 505 having a top wall 506, a single side wall 508, an intermediate wall 509, no end caps (such as the end caps 110 of the lighting device 100 of fig. 1A-2), and a single bottom wall 507. The lighting device 500 is disposed in an ambient environment 540, more specifically, the ambient environment 540 has a plurality of portions adjacent to different components of the lighting device 500. In this case, the ambient portion 540-1 is disposed adjacent to the bottom of the lighting device 500 (adjacent to the open bottom of the cavity portion 590-1 of the cavity 590), and the ambient portion 540-2 is disposed adjacent to the optical structure 520. In this case, ambient portion 540-2 is elevated relative to ambient portion 540-1.

The lighting device 500 includes an optical structure 520. The optical structure 520 is integrated with the side wall 508 of the housing 505 at the distal half of the housing (starting at the intermediate wall 509 of the housing 505) around the entire perimeter of the housing 505. In alternative embodiments, there may be a plurality of optical structures 520 disposed at intervals (e.g., equidistantly, randomly) around the perimeter of the housing 505. The bottom wall 507 is used to help secure the bottom edge of the optical structure 520. In this case, the optical structure 520 has a thickness greater than the thickness of the sidewall 508.

The side walls 508, top wall 506, and intermediate wall 509 of the housing 505 form an enclosed cavity 560, and one or more components (e.g., driver, battery, controller, sensing device) of the lighting device 500 may be housed within the enclosed cavity 560. The housing 505 further comprises a further cavity 590, which further cavity 590 is open (at least at the bottom) and has a plurality of parts (in this case cavity part 590-1 and cavity part 590-2). One or more light sources 570 may be provided on the bottom surface of the intermediate wall 509 of the housing 505 (and thus disposed within the cavity 590). In this case, there are two concentric circles of light sources 570, with each circle having a plurality of light sources 570.

The illumination device 500 further includes a plurality of optical devices 580 located within the cavity 590, wherein each optical device 580 covers one of the light sources 570. These optical devices 580 are disposed against or near the bottom surface of the intermediate wall 509 of the housing 505 and at least partially surround the corresponding light sources 570 such that substantially all of the light emitted by the light sources 570 passes through the optical devices 580.

The lighting device 500 of fig. 5 includes a single reflective member 530 positioned in a cavity portion 590-2 of the cavity 590 near the entire perimeter of the housing 505 formed by the optical structure 520. The orientation of the reflective member 530 redirects some of the light emitted by the light source 570 towards the nearby optical structure 520 for upward illumination. The reflective member 530 forms an angle 535 with a plane formed by the bottom of the bottom wall 507 of the housing 505. The angle 535 may be the same or variable around the entire perimeter formed by the reflective member 530. In this example, the angle 537 is an acute angle to encourage light reflected off of the reflective member 530 to be directed through the nearby optical structure 520.

Fig. 6-14 illustrate various adjustable beam optics in which two or more optics/lenses are coupled together to form a final optic/lens that provides a predetermined light distribution. As further described below and shown in fig. 6-14, the respective optic/lens portions 602, 604 have one or more characteristics including different curvatures, radii of curvature, optical axes, grooves, and thicknesses.

Fig. 6 shows TIR optics for a tunable beam for beam narrowing. TIR optic/lens 602 is provided with insert 604 to create TIR optic/lens 606. As shown, the insert 604 is placed in a cavity of the optic 602 and may be secured via mechanical means or other known means. The insert 604 may be completely or partially surrounded by the optic 602. The beam profile for the original optic 602 is shown in diagram 608 by element 610. The beam profile of the original optic 606 is shown in diagram 608 by element 612.

Fig. 7 shows a TIR optic of a tunable light beam with an adjustment on the top surface that deflects the light beam to the side surface. The original optics/lens 702 with top (703) is provided with a top lens 704 to create TIR optics/lens 706. As shown, top lens 704 is placed on top of optics 702 and may be secured via mechanical means or other known means. The beam profile of the original optics 702 is shown by element 710 in figure 708. The beam profile of the original optics 706 is shown in figure 708 by element 712.

Fig. 8 shows Blob optics for a beam narrowing tunable beam. The original optics/lenses 802 are provided with a top lens 804 to create Blob optics/lenses 806. As shown, a top lens 804 is placed on top of the optic 802 and covers the entire optic 802. Which may be fastened via mechanical means or other known means. The beam profile of the original optic 802 is shown by element 810 in diagram 808. The beam profile of the original optic 806 is shown by element 812 in diagram 808.

Fig. 9 shows Blob optics for a beam-widening tunable light beam. The original optics/lens 902 is provided with a top lens 904 to create Blob optics/lens 906. As shown, a top lens 904 is placed on top of the optic 902 and covers the entire optic 902. Which may be fastened via mechanical means or other known means. The beam profile of the original optic 902 is shown by element 910 in graph 908. The beam profile of the original optic 906 is shown in figure 908 by element 912. Element 914 shows a top view of optic 906.

Fig. 10 shows Blob optics with tunable light beams. The base optics/lens portion 1002 is provided with a top lens portion 1004 to create a Blob optic/lens 1006. As shown, top lens 1004 is placed on top of optics 1002 and may be secured via mechanical means or other known means. The size and shape of the top lens 1004 may vary and the base optics 1002 may be the same for all three versions shown. The beam profile for three Blob optics 1006 is shown in graph 1006. In this way, for example, different street-side optical components are fitted to the individual public house-side optical component shapes.

Fig. 11 shows Blob optics with tunable light beams. Original optics/lens 1102 has a top lens 1104. As shown, a top lens 1104 is placed on top of the optics 1102 and covers a portion of the optics 1102. Which may be secured via mechanical means or other known means. The beam profile of the original optic 1102 is shown in graph 1106 and the beam profile of the optic for the combination is shown in graph 1108.

Fig. 12 shows an optical device with an adjustable beam having an upwardly illuminated reflective member 1210. The first side lens portion 1202 mates with the second side lens portion 1204 to create a final lens 1206. The first side lens portion 1202 with the upwardly illuminated reflective member 1210 provides upwardly illumination. The first side lens portion and the second side lens portion are fastened via mechanical means or other known means. As shown, the first and second side lens portions may have different curvatures and radii of curvature, optical axis, grooves, thicknesses. In diagram 1212, the beam profile for the combined optics and upwardly illuminated reflector is shown, where "1" indicates the upwardly illuminated portion and "2" indicates the downwardly illuminated position.

Fig. 13 shows a beam-tunable extruded optic with an upwardly-illuminated reflector 1314. The optics/lenses 1302 are provided with inserts 1304 to create optics/lenses 1306. As shown, the insert 304 is placed in a cavity of the optical device 1302 and mated into a corresponding portion of the optical device 1302. Which may be fastened via mechanical means or other known means. The insert 1304 may be completely or partially surrounded by the optic 1302. The beam profile for the optical device 1302 is shown by element 1310 in figure 1308. The beam profile of the original optic 1306 is shown in figure 1308 by element 1312.

Fig. 14 shows a beam-tunable extruded optic with upwardly-illuminated reflectors 1414. The optics/lenses 1302 are provided with inserts 1404 to create optics/lenses 1406. As shown, the insert 404 is placed in a cavity of the optical device 1402 and fits into a corresponding portion of the optical device 1402. Which may be fastened via mechanical means or other known means. The insert 1404 may be completely or partially surrounded by the optics 1402. The beam profile for the optical device 1402 is shown by element 1310 in figure 1308. The beam profile of the original optic 1406 is shown in figure 1408 by element 1412.

Depending on the application, all of the above-described optics/lenses or lens portions may be: biconvex, plano-convex, positive meniscus, negative meniscus, plano-concave, biconcave, aspheric, compound, fresnel, lenticular, bifocal, graded index, axicon, etc., or having some of their features, etc. In some cases, an exemplary embodiment may relate to a lighting device that may include a housing including a plurality of walls forming a cavity, wherein the plurality of walls include an optical structure. The lighting device may further comprise a plurality of light sources emitting light into the cavity along a range of radiation paths, wherein the range of radiation paths comprises the first portion and the second portion. The lighting device may further comprise a plurality of louvers arranged at a first position within the cavity, wherein the first position is in a first portion of the range of the radiation path, wherein light in the first portion of the range of the radiation path passes through the plurality of louvers into a first portion of the ambient environment. The lighting device may further comprise a reflective member disposed at a second location within the cavity, wherein the second location is in a second portion of the range of the radiation path, wherein light in the second portion of the range of the radiation path is reflected off the reflective member. With such an illumination device, after reflection off the reflective component, light in a second part of the range of the radiation path passes through the optical structure into a second part of the surrounding environment. Furthermore, for such a lighting device, the second part of the surroundings is raised relative to the first part of the surroundings.

In some cases, exemplary embodiments may relate to an assembly for upward illumination of an illumination device. Such upwardly illuminated assemblies may include an optical structure integrated with the housing of the lighting device. Such an upwardly illuminated assembly may further comprise a reflective member disposed at a location within the cavity formed by the housing of the lighting device, wherein the location is near the side inner surface of the housing. For such upwardly illuminated assemblies, the reflective member is positioned at an acute angle relative to the optical structure, and the reflective member is configured to be disposed adjacent to the opening at the second location in the cavity of the housing, wherein a portion of the light emitted by the light source of the illumination device passes through the opening into the first portion of the ambient environment. Further, with such an upwardly illuminated assembly, the reflective member is configured to reflect at least some of the remaining portion of the light emitted by the light source of the lighting device, and the optical structure is configured to allow at least some of the remaining portion of the light to pass therethrough into a second portion of the ambient environment, and wherein the second portion of the ambient environment is elevated relative to the first portion of the ambient environment. In some cases, for the lighting assembly, the lighting device is a linear luminaire. In other cases, the lighting device is a circular luminaire for the lighting assembly.

Exemplary embodiments may be used to provide upward illumination for various types of lighting devices (e.g., linear fixtures and fixtures with louvers). The exemplary embodiments use a combination of reflective components and optical structures to provide upward illumination. The exemplary embodiments may be used for new installations of lighting devices and for retrofitting existing lighting devices. The exemplary embodiments also provide a number of other benefits. Such other benefits may include, but are not limited to: improved light distribution, easy maintenance, smaller footprint for the lighting device, and compliance with industry standards and regulations for use in lighting devices.

While the embodiments described herein are made with reference to exemplary embodiments, those skilled in the art will appreciate that various modifications are within the scope of the disclosure. Those skilled in the art will appreciate that the exemplary embodiments described herein are not limited to any particular discussed application, and that the embodiments described herein are illustrative rather than limiting. From the description of the exemplary embodiments, equivalents of the elements shown herein will suggest themselves to those skilled in the art, and ways of constructing other embodiments using the present disclosure will suggest themselves to practitioners in the art. Accordingly, the scope of the exemplary embodiments is not limited herein.

Claims (15)

1. A lighting device (100, 300, 400, 500), comprising:

-a housing (105, 305, 405, 505), the housing comprising a plurality of walls (106, 107, 108, 109, 110, 310, 406, 407, 408, 409, 410, 506, 507, 508, 509) forming a cavity (190, 390, 490, 590), wherein the plurality of walls (106, 107, 108, 109, 110, 310, 406, 407, 408, 409, 410, 506, 507, 508, 509) comprises an optical structure (120, 320, 420, 520);

a plurality of light sources (170, 470, 570) that emit light into the cavity (190, 390, 490, 590) along a range of radiation paths (195), wherein the range of radiation paths (195) of light includes a first portion (195-2) and a second portion (195-1); and

at least one adjustable optical device (180, 580, 606) enclosing at least one of a plurality of light sources (170, 570) at least partially within the cavity (190, 590) proximate to the intermediate wall (109, 509), wherein the at least one adjustable optical device (180, 580) comprises two or more optics/lens portions (602, 604), the two or more optics/lens portions (602, 604) being coupled to form the adjustable optical device (180, 580, 606) providing a predetermined light distribution.

2. The lighting device (100, 300, 400, 500) according to claim 1, further comprising:

a reflective member (130-1, 430-1, 530) disposed at a first location (190-2, 490-2, 590-2) in a cavity (190, 390, 490, 590) within a first portion (195-2) of a range of a radiation path (195) of light, wherein light in the first portion (195-2) of the range of the radiation path (195) is reflected off the reflective member (130-1, 430-1, 530) toward the optical structure (120, 320, 420, 520) and then passes through the optical structure (120, 320, 420, 520) into a first portion (140-2, 340-2, 440-2, 540-2) of an ambient environment (140, 340, 440, 540),

wherein light in a second portion (195-1) of the range of the radiation path (195) passes through an opening at a second location (190-1, 490-1, 590-1) in the cavity (190, 390, 490, 590) into a second portion (140-1, 340-1, 440-1, 540-1) of the ambient environment (140, 340, 440, 540), and wherein the first portion (140-2, 340-2, 440-2, 540-2) of the ambient environment (140, 340, 440, 540) is elevated relative to the second portion (140-1, 340-1, 440-1, 540-1) of the ambient environment (140, 340, 440, 540-1), and

An additional reflective member (120-2, 420-2) disposed in the cavity (190, 390, 490) at a third location (190-3, 490-3), wherein light in a third portion of the range of the radiation path (195) is reflected off the additional reflective member (120-1, 320-1, 420-1).

3. The lighting device (100, 300, 400, 500) according to claim 2, wherein the housing (105, 305, 405, 505) further comprises an additional optical structure (120-2, 320-2, 420-2) adjacent to the additional reflective component (130-2, 430-2), wherein after reflection off the additional reflective component (130-2, 430-2) light in a third portion of the range (195) of radiation paths passes through the additional optical structure (120, 320, 420, 520) into a third portion of the ambient environment, wherein the third portion of the ambient environment is elevated relative to the second portion of the ambient environment.

4. The lighting device (100, 300, 400, 500) according to claim 2, further comprising:

-a plurality of louvers (150, 350, 450) in the opening provided at a second location (190-1, 490-1, 590-1) in the cavity (190, 390, 490, 590), wherein light in a second portion (195-1) of the range of radiation paths (195) passes through the plurality of louvers (150, 350, 450) into the second portion (140-1, 340-1, 440-1, 540-1) of the ambient environment (140, 340, 440, 540).

5. The lighting device according to claim 4, wherein the reflective member (130-1, 430-1, 530) is disposed at a first angle (135-1, 435-1) relative to a top surface (151, 451) of at least one of the plurality of louvers (150, 350, 450).

6. The lighting device of claim 5, further comprising:

an additional reflective member (130-2, 430-2) disposed at a third location (190-3, 490-3) within the cavity (190, 490), wherein the additional reflective member (130-2, 430-2) is in a third portion of the range of the radiation path (195), wherein light in the third portion of the range of the radiation path (195) is reflected off the additional reflective member (130-2, 430-2).

7. The lighting device according to claim 6, wherein the housing (105, 305, 405, 505) further comprises an additional optical structure (120-2, 320-2, 420-2), wherein light in a third portion of the range of the radiation path (195) passes through the additional optical structure (120-2, 320-2, 420-2) into a third portion (140-3, 340-3, 440-3) of the ambient environment (140, 340, 440-3) after reflecting off the additional reflective member (130-2, 430-2), wherein the third portion (140-3, 340-3, 440-3) of the ambient environment (140, 340, 440, 540) is elevated relative to a second portion (140-1, 340-1, 440-1, 540-1) of the ambient environment (140, 340, 440, 540).

8. The lighting device according to claim 7, wherein the optical structure (120-2, 320-2, 420-2) and the additional optical structure (120-2, 320-2, 420-2) have substantially similar characteristics with respect to each other.

9. The lighting device of claim 4, wherein the housing (105, 305, 405, 505) further comprises a first end cap securing the reflective member (130-1, 430-1, 530) and the plurality of louvers (150, 350, 450).

10. The lighting device according to claim 2, wherein the first portion (140-2, 340-2, 440-2, 540-2) of the ambient environment (140, 340, 440, 540) is elevated relative to the housing (105, 305, 405, 505).

11. The lighting device according to claim 1, wherein the optical structure (120, 320, 420, 520) is a transparent lens arranged in a housing wall (106, 107, 108, 109, 110, 310, 406, 407, 408, 409, 410, 506, 507, 508, 509).

12. The lighting device according to claim 1, wherein the optical structure (120, 320, 420, 520) is an opening in a housing wall (106, 107, 108, 109, 110, 310, 406, 407, 408, 409, 410, 506, 507, 508, 509) of the housing (105, 305, 405, 505).

13. The lighting device according to claim 1, wherein one adjustable optical device (180, 580, 606) comprises one or more of the following: (1) A first optic/lens portion (602, 1302, 1402) having a cavity into which a second optic/lens portion (604, 1304, 1402) is inserted; (2) A first optic/lens portion (702, 1002, 1102) having a top (703, 1003, 1103) and a second optic/lens portion (704, 1004, 1103) coupled to the top (703, 1003, 1103) of the first optic/lens portion (702, 1003, 1103); (3) A first optic/lens portion (802, 902) and a second optic/lens portion (804, 904) overlying the first optic/lens portion (802, 904); (4) The first side lens portion (1202) mates with the second side lens portion (1204).

14. The lighting device of claim 1, wherein respective ones of the two or more optic/lens portions (602, 604) have one or more characteristics including different curvatures, radii of curvature, optical axes, grooves, and thicknesses.

15. The lighting device according to claim 1, wherein the adjustable optical device (180, 580, 606) or the optics/lens portion (602, 604) is one or more of the following lens types: biconvex, plano-convex, positive meniscus, negative meniscus, plano-concave, biconcave, aspheric, compound, fresnel, lenticular, bifocal, graded index, axicon.