Indirect lighting optical system and lamp

Abstract

The utility model relates to the field of illumination, in particular to an optical system for indirect illumination and a lamp, and the optical system for indirect illumination comprises a light source structure which is used for emitting light; the reflection structure is used for reflecting light; the Rayleigh scattering optical plate and the reflection structure are arranged at an interval, and the Rayleigh scattering optical plate is used for generating Rayleigh scattering and emitting light; the light-emitting surface of the light source structure faces the reflection structure, and light emitted by the light source structure is reflected by the reflection structure and then is emitted through the Rayleigh scattering optical plate. The lamp comprises the optical system for indirect illumination. By adopting an indirect illumination mode, the height of the lamp can be reduced by more than 30%, and the light-emitting surface of the light source structure faces the reflection structure, so that light-emitting points can be well hidden, the light-emitting points are difficult to see at all angles of the lamp, and the effect similar to blue sky can be created.

Description

Technical Field

[0001] The utility model relates to the field of lighting, and particularly relates to an optical system and a lamp for indirect lighting. Background Art

[0002] The blue sky lamp, as the name implies, is a lamp that can simulate the light of a clear sky. It uses high-precision optical design and advanced material technology, such as nano-level materials, and through the Rayleigh scattering principle, makes the light scatter on a specific medium, so as to present an effect similar to that of a blue sky. The blue sky lamp not only improves the brightness of the living room, but also greatly increases the natural and transparent feeling of the space, allowing people to feel the warmth and brightness of the sun indoors.

[0003] As Figure 1 shown, most of the existing blue sky lamps adopt direct lighting distribution, that is, the light source structure 100 is arranged above the Rayleigh scattering optical plate 200, and the light emitted by the light source structure 100 is directly scattered by the Rayleigh scattering optical plate 200 and then emitted. Such a lighting distribution form requires a relatively high installation height, and the light source structure 100 can be seen within a certain angle range, making it difficult to create an effect similar to that of a blue sky. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art that the existing blue sky lamp requires a relatively high installation height, and the light source can be seen within a certain angle range, making it difficult to create an effect similar to that of a blue sky, and to provide an optical system and a lamp for indirect lighting.

[0005] In the first aspect, the utility model provides an optical system for indirect lighting, including

[0006] a light source structure for emitting light;

[0007] a reflection structure for reflecting light;

[0008] a Rayleigh scattering optical plate, which is arranged at an interval from the reflection structure and is used for generating Rayleigh scattering and emitting light;

[0009] the light-emitting surface of the light source structure faces the reflection structure, and the light emitted by the light source structure is reflected by the reflection structure and then emitted through the Rayleigh scattering optical plate.

[0010] In the optical system for indirect lighting of the utility model, the light emitted by the light source structure is reflected by the reflection structure and then emitted through the Rayleigh scattering optical plate. In this way, by adopting the indirect lighting method, the height of the lamp can be reduced by more than 30%, and the light-emitting surface of the light source structure is arranged facing the reflection structure. Therefore, the light-emitting point can be well hidden, making it difficult to see the light-emitting point from all angles of the lamp, and an effect similar to that of a blue sky can be created.

[0011] Preferably, the reflection structure is located above the light source structure, the Rayleigh scattering optical plate is located below the reflection structure, the light source structure is located between the reflection structure and the Rayleigh scattering optical plate, and the light emitting surface of the light source structure faces upward.

[0012] Preferably, the light source structure is arranged at one end close to the Rayleigh scattering optical plate.

[0013] Preferably, the light source structure is arranged close to the Rayleigh scattering optical plate.

[0014] Preferably, the height difference between the light source structure and the Rayleigh scattering optical plate is less than or equal to 10 cm.

[0015] Preferably, the reflection structure includes a Fresnel lens surface, and the Fresnel lens surface is coated with a reflective film.

[0016] Preferably, the Fresnel lens surface is arranged on the side of the reflection structure close to the Rayleigh scattering optical plate.

[0017] Preferably, the Fresnel lens surface is arranged on the side of the reflection structure away from the Rayleigh scattering optical plate.

[0018] Preferably, the Fresnel lens surface is an array body or a linear surface type variation body with equal width and equal depth and the same surface type.

[0019] Preferably, the reflection structure further includes a reflector, and the reflector is arranged on the Fresnel lens surface.

[0020] Preferably, the light source structure includes an LED lamp board and a basic light distribution structure.

[0021] In a second aspect, the present invention provides a lamp, including any one of the optical systems for indirect lighting described above.

[0022] Preferably, the lamp further includes a housing, the Rayleigh scattering optical plate is located at the bottom of the housing, and the light source structure is located at the lower left corner and / or the lower right corner of the housing.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] For the optical system for indirect lighting described in the present invention, the light emitted by the light source structure is reflected by the reflection structure and then emitted through the Rayleigh scattering optical plate. In this way, by adopting the indirect lighting method, the height of the lamp can be reduced by more than 30%, and the light emitting surface of the light source structure faces the reflection structure. Therefore, the light emitting point can be well hidden, making it difficult to see the light emitting point from all angles of the lamp, and an effect similar to that of a blue sky can be created. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of an existing blue sky light.

[0026] Figure 2 It is a schematic structural diagram of the lamp described in the present utility model.

[0027] Figure 3 For Example 1 Figure 2 It is a schematic structural diagram after hiding the housing.

[0028] Figure 4 For Example 1 Figure 2 It is a schematic structural diagram after half-sectioning.

[0029] Figure 5 For Example 1 Figure 2 It is a sectional view after half-sectioning.

[0030] Figure 6 It is a three-dimensional structural diagram of the reflection structure in Example 1.

[0031] Figure 7 For Figure 6 It is a bottom view.

[0032] Figure 8 For Figure 6 It is a front view.

[0033] Figure 9 For Figure 8 It is a partially enlarged schematic diagram.

[0034] Figure 10 It is an optical path diagram of the optical system described in Example 1.

[0035] Figure 11 For Example 2 Figure 2 It is a schematic structural diagram after hiding the housing.

[0036] Figure 12 It is an optical path diagram of the optical system described in Example 2.

[0037] Figure 13 It is a three-dimensional structural diagram of the reflection structure described in Example 3.

[0038] Figure 14 It is an optical path diagram of the optical system described in Example 3.

[0039] Markings in the figure:

[0040] 100 - Light source structure, 101 - LED lamp board, 102 - Basic light distribution structure,

[0041] 200 - Rayleigh scattering optical plate,

[0042] 300 - Reflective structure, 301 - Fresnel lens surface, 302 - Reflector,

[0043] 400 - Housing. Detailed implementation mode

[0044] The following further describes the present utility model in detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the above - mentioned subject matter of the present utility model to the following embodiments. All technologies implemented based on the content of the present utility model belong to the scope of the present utility model.

[0045] In the description of the specific embodiments of the present utility model without special instructions, the expression terms indicating the orientation or positional relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product / device / equipment of the present utility model is usually placed. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in the specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present utility model.

[0046] In addition, for terms such as "horizontal", "vertical", "hanging", "parallel", etc., it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is set in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still perform its function in the solution of the present utility model.

[0047] In addition, the expressions such as "first", "second", "third", etc. in the terms are only used to distinguish the description of the same or similar components, and should not be construed as emphasizing or implying the relative importance of specific components.

[0048] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a number of" represent at least 2. It can be any situation of 2, 3, 4, 5, 6, 7, 8, 9, etc., or even more than 9.

[0049] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / restricted, where the terms "set", "installed", "connected", "linked", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, and can be connection means commonly used in the art such as welding, riveting, bolting, threaded connection, etc. Such a connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0050] Embodiment 1

[0051] As Figure 2 - 5 shown, an optical system for indirect lighting includes a light source structure 100, a reflection structure 300, and a Rayleigh scattering optical plate 200.

[0052] The light source structure 100 is used to emit light, the reflection structure 300 is used to reflect light, and the Rayleigh scattering optical plate 200 is used to generate Rayleigh scattering and emit light.

[0053] The Rayleigh scattering optical plate 200 is arranged at an interval from the reflection structure 300. The light-emitting surface of the light source structure 100 faces the reflection structure 300. After the light emitted by the light source structure 100 is reflected by the reflection structure 300, it is emitted through the Rayleigh scattering optical plate 200.

[0054] For the optical system for indirect lighting of the present utility model, the light emitted by the light source structure 100 is reflected by the reflection structure 200 and then emitted through the Rayleigh scattering optical plate 300. In this way, by adopting the indirect lighting method, the height of the lamp can be reduced by more than 30%, and the light-emitting surface of the light source structure 100 faces the reflection structure 200. Therefore, the light-emitting point can be well hidden, making it difficult to see the light-emitting point from all angles of the lamp, and an effect similar to that of a blue sky can be created.

[0055] The Rayleigh scattering optical plate 200 serves as the light-emitting surface of the blue sky lamp. When installing the blue sky lamp, the Rayleigh scattering optical plate 200 is generally arranged at the bottom of the blue sky lamp. Therefore, preferably, the reflection structure 300 is located above the light source structure 100, the Rayleigh scattering optical plate 200 is located below the reflection structure 300, the light source structure 100 is located between the reflection structure 300 and the Rayleigh scattering optical plate 200, and the light-emitting surface of the light source structure 100 faces upward. In this way, with the light-emitting surface of the light source structure 100 facing upward, people cannot see the light-emitting point when they are under the blue sky lamp, thereby further enhancing the authenticity of the blue sky effect.

[0056] Further, the light source structure 100 can be arranged as close as possible to the Rayleigh scattering optical plate 200. For example, the light source structure 100 is arranged close to the Rayleigh scattering optical plate 200. Further, the height difference between the light source structure 100 and the Rayleigh scattering optical plate 200 is preferably less than or equal to 10 cm, and more preferably less than or equal to 5 cm. Thereby, the height of the lamp can be further reduced.

[0057] The light source structure 100 preferably includes a light source and a basic light distribution structure 102. The light source is further preferably an LED lamp board 101. The basic light distribution structure 102 is used to perform primary light distribution of the light source and distribute the light energy relatively uniformly to the reflection structure 300. The basic light distribution structure 102 is preferably a lens and / or a reflector cup and / or a diffuser plate, etc.

[0058] The reflection structure 300 can achieve light reflection by plating a reflection film, and the reflection film can be an aluminum film. In a preferred embodiment, it may further include a Fresnel lens surface 301, and the Fresnel lens surface 301 is plated with the reflection film. The Fresnel lens surface 301 includes a plurality of micro-units, and each micro-unit is provided with an inclined surface. By providing the Fresnel lens surface 301, the height of the reflection structure 300 can be further reduced, thereby further reducing the height of the lamp.

[0059] As Figure 6 - 10 shown, the Fresnel lens surface 301 can be arranged on the side of the reflection structure 300 close to the Rayleigh scattering optical plate 200. The Fresnel lens surface 301 can be a co-planar type array body with equal width and equal depth (i.e., the structural form of each micro-unit is the same) or a linearly varying surface type (i.e., the structural form of each micro-unit is gradually changed). As Figure 10 shown, the optical system described in this embodiment can achieve a good light output effect, and by providing the Fresnel lens surface 301, the height of the reflection structure 300 can be further reduced, thereby further reducing the height of the lamp.

[0060] Embodiment 2

[0061] As Figure 11 shown, the difference between this embodiment and Embodiment 1 is that the Fresnel lens surface 301 is arranged on the side of the reflection structure 300 away from the Rayleigh scattering optical plate 200. As Figure 12 shown, it can also achieve a good light output effect, and by providing the Fresnel lens surface 301, the height of the reflection structure 300 can be further reduced, thereby further reducing the height of the lamp.

[0062] Embodiment 3

[0063] Based on Embodiment 1 or Embodiment 2, as Figure 13As shown, in this embodiment, a reflector 302 is further added to the reflection structure 300. The reflector 302 can be disposed on the Fresnel lens surface 301. The reflector 302 can create the effect of the sun, such as Figure 14 as shown, so as to achieve a better visual experience.

[0064] Embodiment 4

[0065] A lighting fixture includes an indirect lighting optical system as described in any one of Embodiments 1-3.

[0066] Preferably, the lighting fixture may further include a housing 400. The Rayleigh scattering optical plate 200 is located at the bottom of the housing 100, and the light source structure 100 is located at the lower left corner and / or the lower right corner of the housing 400, so as to facilitate hiding the light-emitting point and further enhance the authenticity of the blue sky effect.

[0067] Preferably, the cross-sectional shape of the housing 400 in the vertical plane can be a rectangle, a trapezoid, a parallelogram, etc., preferably a rectangle or a trapezoid, so as to be more convenient for installation and also facilitate hiding the light-emitting point.

[0068] Preferably, the cross-sectional shape of the housing 400 in the horizontal plane can be a rectangle, a circle, an ellipse, etc.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An indirect lighting optical system, characterized in that: include A light source structure (100) for emitting light; A reflective structure (300) for reflecting light; A Rayleigh scattering optical plate (200), arranged at a distance from the reflective structure (300), and used for generating Rayleigh scattering and emitting light; The light emitting surface of the light source structure (100) faces the reflective structure (300), and the light emitted by the light source structure (100) is reflected by the reflective structure (300) and then emitted through the Rayleigh scattering optical plate (200).

2. An indirect lighting optical system according to claim 1, characterized in that: The reflective structure (300) is located above the light source structure (100), the Rayleigh scattering optical plate (200) is located below the reflective structure (300), the light source structure (100) is located between the reflective structure (300) and the Rayleigh scattering optical plate (200), and the light emitting surface of the light source structure (100) is arranged to face upward.

3. An indirect lighting optical system according to claim 2, characterized in that: The light source structure (100) is arranged at one end close to the Rayleigh scattering optical plate (200), or the light source structure (100) is arranged close to the Rayleigh scattering optical plate (200).

4. An indirect lighting optical system according to claim 3, characterized in that: The height difference between the light source structure (100) and the Rayleigh scattering optical plate (200) is less than or equal to 10 cm.

5. An indirect lighting optical system according to any one of claims 1 to 4, characterized in that: The reflective structure (300) comprises a Fresnel lens surface (301), and the Fresnel lens surface (301) is coated with a reflective film.

6. An indirect lighting optical system according to claim 5, characterized in that: The Fresnel lens surface (301) is arranged on a side of the reflective structure (300) close to the Rayleigh scattering optical plate (200), and / or the Fresnel lens surface (301) is arranged on a side of the reflective structure (300) far from the Rayleigh scattering optical plate (200).

7. An indirect lighting optical system according to claim 5, characterized in that: The Fresnel lens surface (301) is a homogeneous array body or a linear surface variation body with equal width and depth.

8. An indirect lighting optical system according to claim 5, characterized in that: The reflective structure (300) further comprises a reflector (302), wherein the reflector (302) is arranged on the Fresnel lens surface (301).

9. A lamp, characterized in that: An optical system for indirect lighting comprising the optical system as described in any one of claims 1-8.

10. The lamp according to claim 9, characterized in that: It also includes a shell (400), the Rayleigh scattering optical plate (200) is located at the bottom of the shell (400), and the light source structure (100) is located at the lower left corner and / or lower right corner of the shell (400).

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