CN114294610A - Natural light homogenization lighting device and method based on positive combination of double lenses - Google Patents
Natural light homogenization lighting device and method based on positive combination of double lenses Download PDFInfo
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Abstract
The invention discloses a natural light homogenizing illumination device and method based on positive combination of double lenses, which can be used for illuminating curtains, indoor shutters, window glass and the like. The device comprises a front positive lens and a rear positive lens in an array form, wherein the front positive lens and the rear positive lens are respectively a first positive lens array and a second positive lens array; the second positive lens array is used for refracting incident natural light and deflecting the incident natural light to the indoor space. The invention can efficiently collect the natural light entering the window, uniformly disperse the light to all directions indoors, homogenize the indoor illumination, effectively protect the indoor privacy, and is environment-friendly and pollution-free.
Description
Technical Field
The invention belongs to the field of lighting system design and beam shaping, and relates to a device and a method for shaping natural light. By the designed natural light homogenizing lighting device, the natural light incident from the window in the daytime can be uniformly diffused to each corner in the room, the natural light is fully utilized for indoor lighting, energy is saved, emission is reduced, and the energy utilization rate is improved; and effectively protect the indoor privacy, the device is environment-friendly and pollution-free, and can be used as a lighting curtain, an indoor shutter, window glass and the like.
Background
The research and development of the natural light illumination technology in China starts in the sixth and seventy decades of the twentieth century, and since the green illumination engineering promotion in 1996 is carried out to date, the concept of the natural light illumination as a green energy source gradually enters the field of vision of the public, and people have deeper understanding on the natural light collection illumination system along with the continuous deep research on the solar illumination technology. As natural resources such as petroleum and coal are gradually depleted, research and development on solar energy are increasing, and solar energy application technology has the disadvantage that the conversion efficiency of solar energy is low, but the cost is much higher than that of other traditional energy conversion methods, so that the improvement of the utilization efficiency of solar energy and the reduction of the solar energy conversion cost become important targets in recent research.
In order to improve the utilization efficiency of sunlight, one method is to use a solar collector combined with a light guide module to guide sunlight to a solar cell or a heat conduction module through the light guide module, so as to increase the collection efficiency of sunlight and further improve the production efficiency of the solar conversion device. Known solar energy conversion devices require passing through solar collectors to concentrate the incident sunlight to multiple focal points on the light exit side for use by solar cells or heat conducting components. However, the focal length of the collected light causes a huge volume of the known solar energy conversion device, the large-volume solar energy conversion device not only needs to consume higher manufacturing and material cost and is difficult to precisely move and control sun tracking, but also needs a large-area installation area, the light guide pipe occupying the mainstream of the market at present has low efficiency and poor lighting uniformity, and can damage the original building structure in the installation process, and the popularization and the promotion are not facilitated.
Therefore, how to perform efficient solar lighting without changing the original building structure is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
In view of the above, the invention provides a natural light homogenizing illumination device and method based on positive combination of double lenses, which can uniformly disperse natural light incident from a window to every corner in a room in the daytime, fully utilize the natural light to perform indoor illumination, save energy, reduce emission and improve energy utilization rate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the natural light homogenization lighting device based on the positive combination of the double lenses comprises front and rear positive lenses in the form of an array, namely a first positive lens array and a second positive lens array, wherein the first positive lens array is used for collecting outdoor natural light and transmitting the outdoor natural light to the second positive lens array through an air layer serving as an intermediate medium between the two lens arrays; the second positive lens array is used for refracting incident natural light and deflecting the incident natural light to the indoor space.
Preferably, the lens surface of the first positive lens array faces the incident direction of natural light, and the normal of the lens surface forms an acute angle with the incident angle of natural light.
Preferably, the center distance between the first positive lens array and the second positive lens array is greater than the sum of the focal lengths of the two lens arrays, so that light rays are diffused to an indoor space;
the second positive lens array is a partial lens array, and the single unit structure only takes the light-passing part of the positive lenses forming the second positive lens array to make light rays diverge.
Preferably, the second positive lens array and the first positive lens array are arranged in a staggered manner, and the staggered amount is the clear aperture size of a single lens of the second positive lens array;
the unit sizes of the second positive lens array and the first positive lens array are not equal, and the lens size of the second positive lens array is the clear aperture size of a single positive lens forming the second positive lens array.
Preferably, the focus of the single unit of the first positive lens array is located at the center of the single complete positive lens unit of the second positive lens array, so that the light is diffused to the indoor space;
the second positive lens array is a semi-transparent lens array, and the single unit structure of the second positive lens array only takes the lower half part of an ideal positive lens to enable light rays to be diffused.
Preferably, the second positive lens array and the first positive lens array are arranged in a staggered manner, and the staggered amount is the distance between the highest angle convergence point of the incident light in the first positive lens array in a single unit structure and the optical axis of the first lens of the first positive lens array;
the size of the unit of the second positive lens array is not equal to that of the unit of the first positive lens array, and the size of the semi-transparent lens of the second positive lens array is the distance between the highest angle convergence point of the first lens in the second positive lens array and the optical axis.
Preferably, the back focal point of the single lens of the first positive lens array coincides with the front focal point of the single lens corresponding to the second positive lens array to form a keplerian telescope structure, so that light is diffused to an indoor space.
Preferably, the unit sizes of the second positive lens array and the first positive lens array are not equal, and the single lens size of the second positive lens array satisfies that all of the corresponding unit light beams passing through the first positive lens array are collected and converged.
Preferably, the first positive lens array and the second positive lens array are made of a high-transmittance material having a transmittance of 85% or more.
The natural light homogenization illumination method based on the positive combination of the double lenses comprises the following steps:
the outdoor natural light is collected by the first positive lens array and is transmitted to the second positive lens array through the intermediate medium air layer;
the second positive lens array refracts incident natural light and deflects the incident natural light to an indoor space.
Has the advantages that:
the invention provides a natural light homogenizing illumination device and method based on positive combination of double lenses, which can efficiently collect natural light entering a window, uniformly disperse light rays to all indoor directions, homogenize indoor illumination, fully utilize the natural light to carry out indoor illumination, save energy, reduce emission and improve energy utilization rate. And because of adopting the lens array composite structure, the symmetry of light transmission is broken, and the indoor privacy can be effectively protected. The device has various material choices, is environment-friendly and pollution-free, can replace lighting curtains, indoor shutters, window glass and the like, and obtains better indoor lighting effect.
Drawings
Fig. 1 is a schematic structural diagram of a natural light homogenizing illumination device based on a positive-positive combination of two lenses according to embodiment 1 of the present invention.
In the figure: after passing through the device, the outdoor high-angle natural light is diffused to the indoor space;
fig. 2 is a simulation effect diagram of the natural light homogenizing illumination device based on the positive and negative combination of two lenses according to embodiment 1 of the present invention.
In the figure: the first surface and the second surface of the designed device are both positive lens arrays, incident high-angle natural light is collected by the first positive lens array, is converged to the rear focal plane of the second positive lens array through an intermediate medium, and is refracted by the second positive lens array and then is diffused to the indoor space.
Fig. 3 is a schematic structural diagram of a natural light homogenizing illumination device based on a positive-positive combination of two lenses according to embodiment 3 of the present invention.
In the figure: after passing through the device, the outdoor high-angle natural light is horizontally diffused to the indoor space;
fig. 4 is a simulation effect diagram of the natural light homogenizing illumination device based on the positive combination of two lenses according to embodiment 3 of the present invention.
In the figure: the first surface and the second surface of the designed device are both ideal lens arrays, incident high-angle natural light is collected by the first positive lens array, is collected to the second positive lens array through an intermediate medium, and is horizontally diffused to an indoor space after being refracted by the second positive lens array.
Fig. 5 is a schematic structural view of a natural light homogenizing illumination device based on a positive-positive combination of two lenses according to embodiment 5 of the present invention.
In the figure: after passing through the device, the outdoor high-angle natural light is horizontally diffused to the indoor space;
fig. 6 is a simulation effect diagram of the natural light homogenizing illumination device based on the positive combination of two lenses according to embodiment 5 of the present invention.
In the figure: the first surface and the second surface of the designed device are both ideal lens arrays, and outdoor large-angle natural light is collected by the first positive lens array, is refracted by the second positive lens array and then is diffused to an indoor space.
Detailed Description
Exemplary embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the device structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
Example 1: as shown in fig. 1, the present embodiment provides a natural light homogenizing lighting device based on a double-lens positive combination, which includes two front and rear positive lenses in the form of an array, respectively a first positive lens array and a second positive lens array, where the first positive lens array is used to collect outdoor natural light and conduct the outdoor natural light to the second positive lens array through an air layer of an intermediate medium; the second positive lens array is used for refracting incident natural light and deflecting the incident natural light to the indoor space; the first positive lens array and the second positive lens array respectively comprise n unit structures and are in one-to-one correspondence, and n is a natural number larger than or equal to 1.
The center distance between the first positive lens array and the second positive lens array is larger than the sum of the focal lengths of the two lens arrays, so that light rays are diffused to an indoor space;
the second positive lens array is a partial lens array, and the single unit structure only takes the light-passing part of the positive lens forming the second positive lens array to make the light rays diverge;
the second positive lens array and the first positive lens array are arranged in a staggered mode, and the dislocation amount is the clear aperture size of a single lens of the second positive lens array;
the size of the unit of the second positive lens array is not equal to that of the unit of the first positive lens array, and the size of the lens of the second positive lens array is the size of the clear aperture of a single lens.
More specifically: the lens surface of the first positive lens array faces the incident direction of natural light, the normal of the lens surface and the incident angle of the incident natural light form an acute angle, and the natural light incident at a high angle outdoors can be diffused to all corners indoors through the designed device.
More specifically: the focal length of the second positive lens array is 1-5 times of the focal length of the first positive lens array.
More specifically: the first and second positive lens arrays should be a high transmittance material having a transmittance of 85% or more, including but not limited to glass, resin, and transparent plastic.
More specifically: the front and back surfaces are in the form of a square full aperture array.
In order to verify the effect of the device, the focal length of the first positive lens array is selected to be 2mm, the focal length of the second positive lens array is selected to be 5mm, the interval between the first positive lens array and the second positive lens array is 10mm, the light ray divergence effect is simulated, and the simulation result is shown in fig. 2.
Example 2: on the basis of the device in the embodiment 1, a natural light homogenization illumination method based on a double-lens positive combination is designed, and comprises the following steps:
the outdoor natural light is collected by the first positive lens array and is transmitted to the second positive lens array through the intermediate medium air layer;
the second positive lens array refracts incident natural light and deflects the incident natural light to the indoor space.
Example 3: as shown in fig. 3, the present embodiment provides a natural light homogenizing lighting device based on a double-lens positive combination, which includes two positive lenses in the form of front and back arrays, respectively a first positive lens array and a second positive lens array, where the first positive lens array is used to collect outdoor natural light and conduct the outdoor natural light to the second positive lens array through an air layer of an intermediate medium; the second positive lens array is used for refracting incident natural light and deflecting the incident natural light to the indoor space. The first positive lens array and the second positive lens array respectively comprise n unit structures and are in one-to-one correspondence, and n is a natural number larger than or equal to 1.
The focus of the single unit of the first positive lens array is positioned at the center of the single complete positive lens unit of the second positive lens array, so that the light is diffused to the indoor space;
the second positive lens array is a semi-transparent lens array, and the single unit structure of the second positive lens array only takes the lower half part of an ideal positive lens to make light rays diverge.
The second positive lens array and the first positive lens array are arranged in a staggered mode, and the dislocation quantity is the distance between the highest-angle convergence point of incident light in the first positive lens array in a single unit structure and the optical axis of the first lens of the first positive lens array;
the size of the unit of the second positive lens array is not equal to that of the unit of the first positive lens array, and the size of the semi-transparent lens of the second positive lens array is the distance between the highest-angle convergence point of the first lens in the second positive lens array and the optical axis.
More specifically: the lens surface of the first positive lens array faces the incident direction of natural light, the normal of the lens surface and the incident natural light form an acute angle, and the natural light incident at a high angle outdoors can be diverged to all corners indoors in parallel through the designed device.
More specifically: the focal length of the second positive lens array is 0.5-5 times of the focal length of the first positive lens array.
More specifically: the first and second positive lens arrays should be a high transmittance material having a transmittance of 85% or more, including but not limited to glass, resin, and transparent plastic.
More specifically: the front and back surfaces are in the form of a square full aperture array.
In order to verify the effect of the device of the invention, the focal length of the first positive lens is selected to be 5mm, the focal length of the second positive lens is selected to be 5mm, the interval between the first positive lens and the second positive lens is also 5mm, the light ray divergence effect is simulated, and the simulation result is shown in fig. 4.
Example 4: on the basis of the device in the embodiment 3, a natural light homogenization illumination method based on a double-lens positive combination is designed, and comprises the following steps:
the outdoor natural light is collected by the first positive lens array and is transmitted to the second positive lens array through the intermediate medium air layer;
the second positive lens array refracts incident natural light and deflects the incident natural light to the indoor space.
Example 5: as shown in fig. 5, the present embodiment provides a natural light homogenizing lighting device based on a double-lens positive combination, which includes two positive lenses in the form of front and back arrays, respectively a first positive lens array and a second positive lens array, where the first positive lens array is used to collect outdoor natural light and conduct the outdoor natural light to the second positive lens array through an air layer of an intermediate medium; the second positive lens array is used for refracting incident natural light and deflecting the incident natural light to the indoor space. The first positive lens array and the second positive lens array respectively comprise n unit structures and are in one-to-one correspondence, and n is a natural number larger than or equal to 1.
The rear focal point of the single unit lens of the first positive lens array is superposed with the front focal point of the single unit lens of the second positive lens array to form a Keplerian telescope structure, so that light rays are diffused to an indoor space;
the size of the unit of the second positive lens array is not equal to that of the first positive lens array, and the size of a single unit lens of the second positive lens array meets the requirement that all the corresponding unit light beams passing through the first positive lens array are collected and converged.
More specifically: the lens surface of the first positive lens array faces the incident direction of natural light, the normal of the lens surface and the incident natural light form an acute angle, and the natural light incident at a high angle outdoors can be diverged to all corners indoors in parallel through the designed device.
More specifically: the focal length of the second positive lens array is 2-5 times of the focal length of the first positive lens array.
More specifically: the first and second positive lens arrays should be a high transmittance material having a transmittance of 85% or more, including but not limited to glass, resin, and transparent plastic.
More specifically: the front and back surfaces are in the form of a square full aperture array.
In order to verify the effect of the device of the invention, the focal length of the first positive lens is selected to be 2mm, the focal length of the second positive lens is selected to be 5mm, the interval between the first positive lens and the second positive lens is 7mm, the light ray divergence effect is simulated, and the simulation result is shown in fig. 6.
Example 6: on the basis of the device in the embodiment 5, a natural light homogenization illumination method based on a double-lens positive combination is designed, and comprises the following steps:
the outdoor natural light is collected by the first positive lens array and is transmitted to the second positive lens array through the intermediate medium air layer;
the second positive lens array refracts incident natural light and deflects the incident natural light to the indoor space.
Although the embodiments of the present invention have been described above, the contents thereof are merely embodiments adopted to facilitate understanding of the technical aspects of the present invention, and are not intended to limit the present invention. It will be apparent to persons skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The natural light homogenization lighting device based on the double-lens positive combination is characterized by comprising two front and back positive lenses in an array form, namely a first positive lens array and a second positive lens array, wherein the first positive lens array is used for collecting outdoor natural light and transmitting the outdoor natural light to the second positive lens array through an air layer serving as an intermediate medium between the two lens arrays; the second positive lens array is used for refracting incident natural light and deflecting the incident natural light to the indoor space.
2. The natural light homogenizing illumination device based on the positive combination of two lenses according to claim 1, wherein the lens surfaces of the first positive lens array face the incident direction of natural light, and the normal of the lens surface is at an acute angle to the incident natural light angle.
3. The natural light homogenizing illumination device based on the positive combination of two lenses as claimed in claim 1, wherein the center-to-center distance between the first positive lens array and the second positive lens array is larger than the sum of the focal lengths of the two lens arrays, so that the light is diffused to the indoor space;
the second positive lens array is a partial lens array, and the single unit structure only takes the light-passing part of the positive lenses forming the second positive lens array to make light rays diverge.
4. The natural light homogenizing illumination device based on the positive combination of two lenses according to claim 3, wherein the second positive lens array is arranged with the first positive lens array in a staggered manner, and the staggered amount is the clear aperture size of the single lens of the second positive lens array;
the unit sizes of the second positive lens array and the first positive lens array are not equal, and the lens size of the second positive lens array is the clear aperture size of a single positive lens forming the second positive lens array.
5. The natural light homogenizing illumination device based on the positive combination of two lenses according to claim 1, wherein the focus of the single unit of the first positive lens array is located at the center of the single complete positive lens unit of the second positive lens array, so that the light is diffused to the indoor space;
the second positive lens array is a semi-transparent lens array, and the single unit structure of the second positive lens array only takes the lower half part of an ideal positive lens to enable light rays to be diffused.
6. The natural light homogenizing illumination device based on the positive combination of two lenses according to claim 5, wherein the second positive lens array is arranged with the first positive lens array in a staggered manner, and the staggered amount is the distance between the highest angle convergence point of the incident light in the first positive lens array in the single unit structure and the optical axis of the first lens of the first positive lens array;
the size of the unit of the second positive lens array is not equal to that of the unit of the first positive lens array, and the size of the semi-transparent lens of the second positive lens array is the distance between the highest angle convergence point of the first lens in the second positive lens array and the optical axis.
7. The natural light homogenizing illumination device based on the positive combination of two lenses as claimed in claim 1, wherein the back focal point of the single lens of the first positive lens array coincides with the front focal point of the single lens corresponding to the second positive lens array to form a keplerian telescope structure, so that the light is diffused to the indoor space.
8. The natural light homogenizing illumination device based on positive combination of two lenses as claimed in claim 7, wherein the unit sizes of the second positive lens array and the first positive lens array are not equal, and the single lens size of the second positive lens array satisfies the requirement that all the corresponding unit light beams passing through the first positive lens array are collected and converged.
9. The natural light homogenizing illumination device according to claim 1, wherein the first positive lens array and the second positive lens array are high transmittance materials with transmittance of 85% or more.
10. The natural light homogenization illumination method based on the positive combination of the double lenses is characterized by comprising the following steps of:
the outdoor natural light is collected by the first positive lens array and is transmitted to the second positive lens array through the intermediate medium air layer;
the second positive lens array refracts incident natural light and deflects the incident natural light to an indoor space.
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| CN115451370A (en) * | 2022-10-13 | 2022-12-09 | 哈尔滨工业大学 | Natural light homogenization lighting device based on combination of convex lens and semi-plano-convex lens |
| CN115451371A (en) * | 2022-10-13 | 2022-12-09 | 哈尔滨工业大学 | Natural light homogenization lighting device based on combination of plano-convex lens and semi-plano-convex lens |
| CN115523461A (en) * | 2022-10-13 | 2022-12-27 | 哈尔滨工业大学 | Natural light homogenization lighting device based on combination of biconcave lens and biconvex lens |
| CN115523461B (en) * | 2022-10-13 | 2023-09-29 | 哈尔滨工业大学 | Natural light homogenizing lighting device based on double concave lens and double convex lens combination |
| CN116123473A (en) * | 2023-01-06 | 2023-05-16 | 哈尔滨工业大学 | Natural light homogenizing lighting device based on combination of biconcave lens and semi-convex lens |
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