A natural light illumination system

Abstract

The application provides a natural light illumination system, which comprises a natural light guide illumination device or a natural light fiber illumination device, a light turning device and a heliostat. The light turning device is adjacent to a light inlet of the light guide part. The heliostat reflects sunlight towards the light turning device. The light turning device can capture light and turn the sunlight directly irradiated thereon and the sunlight reflected thereon to the light inlet of the light guide part, so that the total amount of light entering the light guide device is increased, and the system efficiency is improved.

Description

Technical Field

[0001] This invention relates to a natural light lighting system, specifically to a natural light lighting system that improves system efficiency by changing the amount and angle of natural light entering the lighting system. Background Technology

[0002] Natural light lighting systems are devices that utilize natural light to illuminate indoor spaces, aiming to improve indoor lighting quality, reduce energy consumption, and enhance the comfort of living and working environments. Based on light-guiding devices, such as light pipes, natural light lighting systems are called natural light guiding lighting systems. Natural light lighting systems based on fiber optic devices are called natural light fiber optic lighting systems. Both can guide outdoor sunlight into indoor areas away from windows to provide illumination. This type of system is particularly suitable for indoor spaces that cannot obtain sufficient natural light directly through windows.

[0003] Natural light lighting systems mainly consist of three parts: a light-collecting section, a light-guiding section, and a light-diffusing section. The light-collecting section is generally made of light-transmitting material, which collects sunlight while protecting the system. Sunlight collected by the light-collecting section enters the light-guiding section through a light inlet. The light-guiding section of a natural light light-guiding lighting system differs from that of a natural light fiber optic lighting system. The light-guiding section of a natural light light-guiding system is made of hollow or solid light-guiding tubes, allowing sunlight entering from the light inlet to travel through multiple reflections before finally being conducted into the room. The light-guiding section of a natural light fiber optic lighting system typically includes a focusing device and optical fibers. The light-diffusing section, made of light-transmitting or light-diffusing material, is generally placed on the ceiling and disperses the sunlight entering the room through the light-guiding section, providing large-area illumination.

[0004] Natural light guiding lighting devices are simple in structure and low in cost. They can penetrate ceilings to provide sunlight indoors, making them environmentally friendly and economical. However, in this type of device, the amount of light received is directly proportional to the diameter of the light-collecting aperture and the cross-sectional area of ​​the light guide tube. This means that if more sunlight is desired, the diameter of the light-collecting aperture and the cross-sectional area of ​​the light guide tube must be increased. This usually means occupying more building space, thus limiting its application due to site constraints. For example, in multi-story buildings, the interior space closer to the ground floor needs more supplemental natural sunlight. However, if the area of ​​the light-collecting section and the cross-sectional area of ​​the light guide tube are increased to meet the light requirements of the ground floor, it will inevitably increase the space occupied on each floor, limiting its application.

[0005] For natural light fiber optic lighting devices, increasing the amount of light requires a proportional increase in the cross-sectional area of ​​the light guide, as well as an increase in the area of ​​the light inlet, light-collecting part, and / or light-concentrating device to increase the amount of light collected.

[0006] Therefore, it is hoped that the amount of light in the system can be increased and the efficiency of existing natural light lighting devices can be improved without increasing the building space required for the light guide section of the lighting system. Summary of the Invention

[0007] To address the aforementioned technical problems, this application aims to provide a natural light illumination system that increases the amount of light entering the system and improves its efficiency by providing more sunlight through a heliostat and changing the amount and angle of sunlight entering the light guide illumination system through a light deflector.

[0008] One aspect of the present invention provides a natural light guiding illumination system, including a natural light guiding illumination device, a light deflecting device, and a heliostat. The natural light guiding illumination device has a light guiding section. The light deflecting device is located near the light inlet of the light guiding section. The heliostat reflects sunlight toward the light deflecting device. The light deflecting device can capture light and deflect sunlight directly illuminating it and sunlight reflected from it toward the light inlet of the light guiding illumination device, thereby increasing the total amount of light entering the light guiding device and improving system efficiency. Preferably, the entire area of ​​the light deflecting device can capture light and deflect the received light.

[0009] Another aspect of the present invention provides a natural light fiber optic illumination system, including a natural light fiber optic illumination device, a light redirection device, and a heliostat. The natural light fiber optic illumination device has a light guide section. The light redirection device is located near the light inlet of the light guide section. The heliostat reflects sunlight toward the light redirection device. The entire area of ​​the light redirection device can capture light and change the incident angle of the light, redirecting sunlight directly illuminating it and sunlight reflected from it toward the light inlet, thereby increasing the total amount of light entering the fiber optic device and improving system efficiency.

[0010] The light-directing device in this invention refers to a device capable of changing the direction of light propagation. Prisms and mirrors can both be used as light-directing devices in this system; they are relatively simple, reliable, economical, and easy to integrate into the system. In some embodiments, the light-directing device is a prism or a combination of prisms.

[0011] In some embodiments, the light deflector is one or more planar or curved walls formed by a combination of multiple prisms or mirrors. In some embodiments, the light deflector is a cylindrical shape with open top and bottom ends, such as a cylindrical or square tube with open top and bottom ends. In other embodiments, the light deflector only partially encloses the light entrance, while the other part remains open.

[0012] In some embodiments, the light steering device is in the form of a thin sheet.

[0013] In some embodiments, the lower open end of the light-directing device, which is open at both the top and bottom, leads to the light inlet, while the upper opening is either closed or capable of being closed. Preferably, the closed upper end is light-transmitting.

[0014] Preferably, the entire area of ​​the light redirection device can capture light and redirect the received light.

[0015] Preferably, the light steering device is located near the edge of the light inlet.

[0016] A light deflector converts light with a small incident angle relative to the light inlet into light with a larger incident angle, and allows light that cannot enter the light inlet to change direction and enter the light inlet, thus enabling more light to enter the lighting device and increasing the total light output and efficiency of the system. Depending on the incident angle of the light and the components of the light deflector, light undergoes refraction or reflection when passing through it. Reflection can be internal reflection. When a plane mirror is used as a light deflector, light reflection occurs, changing the direction of light propagation. When a prism is used as a light deflector, light refraction or internal reflection occurs, changing the direction of light propagation.

[0017] The heliostat in this invention refers to an optical device that reflects light from the sun or other celestial bodies in a fixed direction, and typically includes a biaxial device and a plane mirror.

[0018] Because heliostats can change angles to follow sunlight, they redirect as much direct sunlight as possible through reflections from the plane mirrors to the light redirection device. This allows the light redirection device to receive not only the direct sunlight but also a significant amount of additional light reflected from the heliostats. Furthermore, the light redirection device directs both the direct and reflected light towards the light inlet, increasing the amount of light the system can collect and transmit, thus improving the system's lighting efficiency.

[0019] To prevent the heliostat itself from blocking direct sunlight from entering the light inlet of a natural light illumination device, the heliostat is typically positioned not higher than the light inlet. This ensures that sunlight reflected by the heliostat can only reach the light inlet of the light-guiding or fiber optic illumination device at a low angle, i.e., a small angle with the horizontal plane. In this invention, thanks to the light-deflecting effect of a light-deflecting device placed around the light inlet, sunlight from the heliostat with a low angle of incidence relative to the light inlet can be deflected downwards and enter the light inlet at a higher angle. This reduces the number of reflections during subsequent light guiding, lowers the refraction rate, and improves the overall system efficiency.

[0020] Preferably, the heliostat is configured not to obstruct the light intake of the lighting system of the present invention during system operation, for example, between 8 a.m. and 5 p.m., in order to improve system efficiency.

[0021] In some implementations, an optical relay device is added between the heliostat and the optical redirection device to increase system flexibility and meet the needs of more scenarios.

[0022] Preferably, the optical relay device is configured not to block the lighting system from direct sunlight during system operation, such as between 8 a.m. and 5 p.m., in order to improve system efficiency.

[0023] Preferably, at least some points on the light steering device satisfy the following conditions: when the direction of the incident light passing through a certain point a is defined as vector i, and the direction of the outgoing light is defined as vector t, the angle between vectors i and t is greater than 0, and vector t intersects the plane M where the light entrance is located at the intersection point W, and the distance WK between W and the centroid K of the shape enclosed by the light entrance is less than R; where R is the maximum distance from K to the edge of the light entrance.

[0024] The natural light illumination system according to the present invention includes a heliostat and a light steering device, and in some embodiments, a relay device is configured. Without changing the space occupied by the original natural light guiding illumination device or fiber optic illumination device inside the building, the system increases the amount of light in the natural light illumination system and improves the light-gathering efficiency. It also has the advantages of flexible configuration and wider application in various scenarios. Attached Figure Description

[0025] Figure 1 Existing natural light guiding lighting devices.

[0026] Figure 2 Existing natural light fiber optic lighting devices.

[0027] Figure 3 A natural light guiding illumination system according to an embodiment of the present invention.

[0028] Figure 4 The working principle of a planar light steering device when placed vertically.

[0029] Figure 5 A semi-open space formed by two planar light-directing devices placed vertically.

[0030] Figure 6 : An enclosed space formed by four planar light-directing devices placed vertically.

[0031] Figure 7 According to an embodiment of the present invention, a natural light guiding illumination system including a light relay device is provided.

[0032] Figure 8 According to one embodiment of the present invention, a natural light fiber optic illumination system includes a combined heliostat and a combined optical relay device.

[0033] Figure 9 According to one embodiment of the present invention, a natural light fiber optic illumination system comprising two heliostats is provided.

[0034] Figure 10 Example diagram of the light steering device and light entrance position according to an embodiment of the present invention.

[0035] List of reference numerals

[0036] 100 Natural light guide lighting devices

[0037] Lighting section 101

[0038] Light entrance 102

[0039] Light guide section 103

[0040] Astigmatism section 104

[0041] 105 openings in the roof

[0042] Natural light fiber optic lighting fixture 200

[0043] Concentrating Module 201

[0044] Fiber optic cable 202

[0045] Glass column 203

[0046] Lens 204

[0047] Natural light guiding lighting system 300

[0048] Light steering device 301

[0049] Heliostat 302

[0050] Light steering device assembly 311

[0051] Combined heliostat 312

[0052] Plane mirror 313

[0053] Enclosed light steering device 321

[0054] Natural light fiber optic lighting system 400

[0055] Optical Transmitter 401

[0056] Combined optical transceiver 411

[0057] Sunbeam 31

[0058] Direct sunlight 32

[0059] Incident light 33

[0060] The emitted ray is 34. Detailed Implementation

[0061] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Specific embodiments are only used to explain the present invention and are not considered as limiting the present invention. For ease of description, some drawings only show parts related to the present invention or specific embodiments. Unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0062] Figure 1 This shows an existing natural light guiding illumination device 100 based on a light guide tube.

[0063] like Figure 1 As shown, a light-guiding lighting device 100, disposed in an opening 105 in the roof, includes a light-collecting section 101, a light-guiding section 103, and a light-diffusing section 104 (i.e., a light-diffusing terminal). The roof opening 105 provides an entrance for installing the light-guiding section 103 on the building. The light-collecting section 101 is made of a transparent plexiglass material. The light entrance 102 provides an entrance for sunlight to enter the light-guiding section 103 from the light-collecting section 101. The light-guiding section 103 of the light-guiding lighting device is made of a highly reflective metallic material, such as a metal pipe, and may have a coating or lining, and / or contain optical devices such as mirrors, for the purpose of efficiently transmitting light therein to the desired lighting area. The light-diffusing section 104 is made of a transparent material with light-scattering function, such as plexiglass. The light-collecting section 101 is installed above the light-guiding section 103 and connected to it at the light entrance 102, and the light-diffusing section 104 is installed below the light-guiding section 103 and connected to it. The figure shows a beam of sunlight passing through the light-collecting part 101 and entering the light-guiding part 103. After multiple reflections inside the light-guiding part 103, the light reaches the light-diffusing part 104, which then scatters the light and enters the room, serving as illumination.

[0064] Figure 2 This demonstrates an existing fiber-optic-based natural light fiber optic lighting system 400.

[0065] like Figure 2As shown, a fiber optic lighting device 200 is installed in an opening 105 in the roof and includes a light-collecting section 101, a light-guiding section 103, and a light-diffusing section 104 (i.e., a light-diffusing terminal). The roof opening 105 provides an entrance for installing the light-guiding section 103 on the building. The light-collecting section 101 is made of a transparent material, such as plexiglass; the light-guiding section 103 includes a light-concentrating assembly 201 and an optical fiber cable 202 for transmitting light; the light-diffusing section 104 is made of a transparent material or component with light-scattering function, such as plexiglass. The light entrance 102 provides an entrance for sunlight to enter the light-guiding section 103 from the light-collecting section 101. The light-collecting section 101 is installed above the light-guiding section 103 and connects to the light-guiding section at the light entrance 102; the light-diffusing terminal 104 is installed below the light-guiding section 103 and connects to it. Figure 2 As shown, when a beam of sunlight with a high incident angle shines on the light-collecting part 101 of the fiber optic lighting device, it enters the focusing component 201 for focusing and enters the fiber optic cable 202. It then enters the room along the distribution of the fiber optic cable 202 and finally exits from the diffuser part 104, i.e. the diffuser terminal, to serve as indoor lighting.

[0066] Figure 3 A natural light guiding illumination system 300 according to an embodiment of the present invention is shown. For example... Figure 3 As shown, the system includes a light-guiding lighting device 100, a heliostat 302, and a light-directing device 301. The light-guiding lighting device 100 is installed in an opening 105 in the roof and includes a light-collecting section 101, a light-guiding section 103, and a light-diffusing section 104 (not shown). The light-collecting section 101 is connected to the light-guiding section 103 via a light inlet 102. The light-collecting section 101 is generally a cover made of a transparent material, such as plexiglass, serving to collect light and protect the lighting device.

[0067] exist Figure 3 In this system, a light-receiving section 101 is surrounded by a light-directing device 301. The light-directing device 301 is a rectangular tube open at both ends, with the light-receiving section 101 and the light inlet 102 located within the bottom opening of the rectangular light-directing device 301. A heliostat 302 is positioned not far from the light-directing device 301. This heliostat 302 includes a plane mirror and a rotation axis. During system operation, the heliostat 302 dynamically tracks the sun and reflects sunlight back to the light-directing device 301. Figure 3 As shown, the solar beam 31 is reflected by the heliostat 302 to the light deflection device 301, and after being deflected by it, the incident angle is changed, and it enters the light guide section 103 through the light inlet 102.

[0068] Due to the above-described configuration, when the system including the heliostat 302 and the light redirection device 301 according to the present invention is in operation, the total amount of sunlight entering the light guide section 103 is increased compared to the total amount of sunlight in existing light-guiding lighting systems. On sunny days, direct sunlight accounts for approximately 60-80% of the total radiation; therefore, it can be demonstrated that due to the introduction of more sunlight by the new system, considering the nearly 20% efficiency loss caused by reflection and / or refraction, the total amount of sunlight entering the light guide section 103 can increase by 50% or more when adding a heliostat of the same area. Different heliostat distances, areas, and / or numbers can be adjusted according to system needs to meet the layout and light intensity requirements of different scenarios. For example, it can provide higher levels of indoor lighting for more users on lower floors.

[0069] exist Figure 3 In the illustrated embodiment, the light deflector 301 is configured to process direct sunlight 32 from the sun and reflected sunlight from the heliostat 302 in a consistent manner. This allows direct sunlight and reflected sunlight, with the same incident direction and angle, to enter the light inlet 102 of the light guide section 103 in the same direction and exit angle. This configuration does not affect the utilization of direct sunlight by the conventional conduit-type light guide lighting device 100, thereby increasing the utilization of sunlight while maintaining its original functionality.

[0070] Figure 4 A planar light-directing device 301, consisting of four parallel prisms, is shown. A prism is a typical and common optical device, generally elongated with a triangular cross-section, and made of a transparent material. For example... Figure 4 Several low-angle incident light rays 33 are reflected internally by the prism to form several high-angle outgoing light rays 34, etc.

[0071] Figure 5 This demonstrates a semi-open light-directing device assembly 311 formed by two vertically placed planar light-directing devices 301. Light rays pass through the planes of the two light-directing devices 301 and are deflected into the semi-enclosed inner space of the light-directing device assembly 311. Figure 5 The space between the interior angles of two planes is then entered, for example... Figure 3 or Figures 7-9 In the light inlet 102 shown.

[0072] Figure 6 An enclosed light-directing device 321, formed by four vertically arranged planar light-directing devices 301, is demonstrated. Its shape is a square tube open at both the top and bottom. Direct or reflected light beams pass through the light-directing devices, are deflected, and enter the enclosed light-directing device 321, entering through the open bottom of the square tube, for example... Figure 3 or Figures 7-9In the light inlet 102 shown.

[0073] Inside the light-directing device assembly 311 and the enclosed light-directing device 321, the light-collecting part 101 and the light entrance 102 can be set up and accommodated.

[0074] The light steering device 301, the light steering device assembly 311, and / or the enclosed light steering device do not necessarily have to be as follows: Figures 4-6 The shape of the planar or rectangular vertical wall shown can be different from other shapes, such as curved walls or cylinders.

[0075] Figure 7 Another embodiment of the natural light guiding illumination system 300 according to the present invention is shown. This embodiment includes... Figure 3 The natural light guiding illumination system shown is different in that, Figure 7 In the illustrated embodiment, at the distance Figure 3 A light relay device 401 is also installed not far from the heliostat 302 shown. The sunlight beam 31 is first reflected by the heliostat 302 onto the light relay device 401, then redirected to the light redirection device 301, and finally enters the light inlet 102 after reflection or refraction. When the light relay device 401 completes the light relay, it should be configured to both change the direction of the light and minimize the loss of transmitted light. For example, it can be configured as specular reflection, or total internal reflection. The newly added light relay device 401 in this embodiment allows the system according to the present invention to adapt to more scenario requirements, with more flexible installation positions. At the same time, it allows the angle of the light reflected to the light inlet 102 to be adjusted in more positions, that is, only the angle of the light relay device 401 needs to be adjusted, without adjusting the heliostat 302. This will increase the convenience and flexibility of system control in practical applications.

[0076] Figure 8 The image shows a natural light fiber optic lighting system 400 according to the present invention. The system includes, as shown in the image... Figure 2 The fiber optic lighting device 200 shown includes a light-collecting section 101, a light-guiding section 103, and a light-diffusing section 104 (not shown). The difference lies in... Figure 8 In the embodiment of the present invention shown, a light-directing device 301 is provided around the light-collecting part 101. In this embodiment, the light-directing device 301 is a rectangular tube open at both the top and bottom. The light-collecting part 101 and the light inlet 102 are located inside the bottom opening of the rectangular light-directing device 301. A heliostat 302 is provided not far from the light-directing device 301. The heliostat includes a plane mirror and a rotation axis. When the system is running, the heliostat 302 can dynamically track the sun and reflect sunlight to the light-directing device 301. Figure 3As shown, the solar beam 31 is reflected by the heliostat 302 to the light deflection device 301, and after being deflected by it, the incident angle is changed, and it enters the light guide section 103 through the light inlet 102.

[0077] Due to the aforementioned structure, the total amount of sunlight entering the light guide section 103 during system operation based on the heliostat 302 and light deflector 301 is increased compared to the total amount of sunlight in existing light-guiding lighting systems. On sunny days, direct sunlight accounts for approximately 60-80% of the total radiation; therefore, it can be demonstrated that due to the introduction of more sunlight by the new system, considering the nearly 20% efficiency loss caused by reflection and / or refraction, the total amount of sunlight entering the light guide section 103 can increase by 50% or more with the addition of a heliostat of the same area. Different heliostat distances, areas, and / or numbers can be adjusted according to system needs to meet the layout and light intensity requirements of different scenarios. For example, it can provide higher levels of indoor lighting for users on more floors and lower levels.

[0078] Figure 8 The heliostat is presented in the form of a combined heliostat 312. Figure 8 The combined heliostat 312 includes a rotating frame and plane mirrors. Four parallel and synchronously rotating axes are mounted on the frame, and a plane mirror is mounted on each axis. In this embodiment, a total of four heliostat plane mirrors are installed. The advantage of the combined heliostat 312 is that multiple mirrors can be driven to track and reflect sunlight to their respective designated areas using a single dual-axis system, increasing light-gathering efficiency.

[0079] Figure 8 In the process, a set of combined light relay devices 411 is also set not far from the combined heliostat 312. It also includes 4 plane mirrors, which are placed in the areas corresponding to the plane mirrors of the above-mentioned 4 heliostats. They receive the reflected light from the combined heliostat 312 and reflect the received light to the light turning device 301.

[0080] like Figure 8 As shown, a beam of sunlight 31 is first reflected by the combined heliostat 312 onto the plane mirror 313 included in the intermediate combined light relay device 411, then deflected by the plane mirror 313 to the light redirection device 301, and finally enters the light guide section 103. Similarly, other beams of sunlight 31 are reflected by the combined heliostat 312 onto the other three plane mirrors on the intermediate combined light relay device 411 in the same manner, then deflected to the light redirection device 301, and finally enter the light inlet 102.

[0081] It should be understood that, in Figure 8 In the illustrated embodiment, other types of heliostats may also be used, such as Figure 3The heliostat 302 shown is an example. Other types of light relay devices can also be used, such as... Figure 3 The optical transceiver shown is an optical transceiver device.

[0082] exist Figure 8 In the illustrated embodiment, the focusing component 201 is composed of one or more solid glass pillars and / or glass fibers. For example, it can be composed of multiple acrylic pillars 203 and multiple lenses 204. The acrylic pillars 203, such as acrylic, due to their excellent light transmittance and good physical properties, can serve as initial light-capturing and guiding elements, helping the system guide light captured from a relatively wide area towards the lenses. The lenses 204 are used to further focus the light, ensuring that the light enters the fiber optic cable 202 more concentratedly. In the natural light fiber optic lighting system according to the present invention, the diffuser 104 can be a concave lens. In other embodiments, it can also be a diffuser, multimode fiber, frosted glass, or other diffuser terminals to achieve different lighting effects and distributions. The arrangement of the focusing component 201 in this embodiment is similar to... Figure 9 The same as in the illustrated embodiments, the reference numerals are used to identify them. Figure 9 In the following text.

[0083] Figure 9 A natural light fiber optic illumination system 400 according to an embodiment of the present invention is shown. The natural light fiber optic illumination system 400 includes a fiber optic illumination device 200, a heliostat 302, and a light steering device 301. Like the natural light guiding illumination device 100, the natural light fiber optic illumination device 200 includes a light-collecting section 101, a light-guiding section 103, and a light-diffusing section 104. In this embodiment, the light-collecting section 101 of the fiber optic illumination system 400 is a transparent acrylic glass cover, and the light-guiding section 103 includes a focusing assembly 201 and an optical fiber cable 202. The focusing assembly includes a solid glass column 203 and a lens 204, and the light-diffusing section 104 consists of a diffuser terminal. The materials of the glass column 203, the lens 204, and the optical fiber cable 202 can all be solid organic or inorganic glass, differing only in their specific diameter and refractive index. In this embodiment, the glass column 203 is positioned before the lens 204 in the optical path, and the lens 204 is positioned before the optical fiber cable 202 in the optical path. In this embodiment, the astigmatism section 104 is a solid transparent lens, which can be made of organic or inorganic glass.

[0084] exist Figure 9In the illustrated embodiment, a light-directing device 301 is arranged around the light-collecting section 101 of the natural light fiber optic lighting system 400, and two heliostats 302 are arranged nearby. During system operation, the heliostats 302 track the movement of the sun and reflect the sunlight beams 31 with a low incident angle relative to the light inlet 102 onto the light-directing device 301. The light-directing device 301 then directs the light downwards, allowing it to pass through the light-collecting section 101 to the light guide section 103. The light then passes sequentially through the glass column 203, lens 204, and fiber optic cable 202 of the light guide section 103, finally entering the room through the diffuser section 104 (i.e., the diffuser terminal) to provide illumination. Due to the combined action of the heliostats 302 and the light-directing device 301, the sunlight beams 31 that previously could not fall into the light inlet 102 due to their low incident angle can now reach the light inlet 102. Furthermore, due to the light-directing effect of the light-directing device 301, the sunlight beam 31 with a lower incident angle enters the light column 203, lens 204, and fiber optic cable 202 at a more perpendicular angle after being redirected downwards. This reduces the number of reflections during subsequent light guiding, lowers the refractive index, and improves the overall system efficiency. In some embodiments, the plexiglass column 203 and lens 204 in the focusing component 201 of the fiber optic system can be replaced with other components with focusing functions, such as a composite focusing glass body made by means of variable diameter, welding, or using a continuously variable refractive index technique.

[0085] Figure 10 The preferred positional relationship between the light steering device 301 and the light inlet 102 in the preferred embodiment is explained. When this positional relationship is satisfied, in the working state, for example, between 8:00 AM and 5:00 PM, the light steering device 301 can work relatively effectively, delivering at least part or all of the reflected light from the heliostat to the light inlet 102. Figure 10 It includes a Figure 4 The vertically placed planar light-directing device 301 shown is illustrated. Figure 10 As shown, at least some points on the light-directing device 301 satisfy the following conditions: when the direction of the incident light passing through a point a is defined as vector i, and the direction of the outgoing light is defined as vector t, the angle between vectors i and t is greater than 0, and vector t intersects the plane M containing the light inlet 102 at intersection point W, and the distance WK between W and the centroid K of the shape enclosed by the light inlet 102 is less than R; where R is the maximum distance from K to the edge of the light inlet 102. The above conditions apply to light-directing devices 301 of various specific shapes in each embodiment. It should be noted that the geometric definition of the centroid is the intersection of two vertical lines of any shaped object; the geometric definition of the vertical line is the line connecting the centroid of an object measured by a conical plumb line and the center of gravity of the Earth.

[0086] This invention is not limited to the embodiments discussed above. The above description of specific embodiments is intended to describe and illustrate the technical solutions involved in this invention. Obvious modifications, substitutions, or combinations based on the teachings of this invention should also be considered to fall within the protection scope of this invention. The above specific embodiments are used to disclose the best implementation methods of this invention, so that those skilled in the art can apply various embodiments and alternatives of this invention to achieve the objectives of this invention.

Claims

1. A natural light illumination system, comprising a light guide device (100) or an optical fiber device (200), characterized in that: It also includes a heliostat (302) and a light-directing device (301), which is configured to change the direction of the received light so that the light enters the light inlet (102) of the light guide (103).

2. The natural light illumination system as described in claim 1, characterized in that, The heliostat (302) tracks sunlight and reflects it through a plane mirror to the light-directing device (301).

3. The natural light illumination system as described in claim 1, characterized in that: The light steering device (301) includes a planar wall or curved wall consisting of one or more mirrors and / or prisms.

4. The natural light illumination system as described in claim 1, characterized in that: A light transfer device (401) is added between the heliostat (302) and the light turning device (301).

5. The natural light illumination system as described in claim 4, characterized in that: The heliostat (302) and / or the light transfer device (401) are configured not to block the light transmitted to the light transfer device (301) in the working state.

6. The natural light illumination system as described in claim 4, characterized in that: The heliostat (302) and / or the optical transceiver (401) can be configured as a single unit, multiple units, or a combination thereof.

7. The natural light illumination system as described in claim 2, characterized in that: The light steering device (301) is located near the light entrance (102).

8. The natural light illumination system as described in claim 7, characterized in that: At least some points a on the light steering device (301) satisfy the following conditions: when the direction of the incident light passing through a is defined as vector i, and the direction of the outgoing light is defined as vector t, the angle between the two vectors i and t is greater than 0, and the vector t intersects the plane M where the light entrance (102) is located at the intersection point W, and the distance WK between W and the centroid K of the shape enclosed by the light entrance (102) is less than R; where R is the maximum distance from K to the edge of the light entrance (102).

9. The natural light illumination system as described in claim 1, characterized in that, The light steering device (301) is independently configured outside the light-collecting part (101).

10. The natural light illumination system as described in any one of claims 1-9, characterized in that, The sunlight beam is reflected or refracted when it passes through the light deflector (301).

11. The natural light illumination system as described in claim 10, characterized in that, The reflection is internal reflection.

Images