CN107940404B - Compound parabolic condenser, method for determining size parameters of compound parabolic condenser and reflection cup - Google Patents

Compound parabolic condenser, method for determining size parameters of compound parabolic condenser and reflection cup Download PDF

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CN107940404B
CN107940404B CN201711130499.8A CN201711130499A CN107940404B CN 107940404 B CN107940404 B CN 107940404B CN 201711130499 A CN201711130499 A CN 201711130499A CN 107940404 B CN107940404 B CN 107940404B
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compound parabolic
light source
led light
parabolic concentrator
determining
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CN107940404A (en
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陈丽
徐斌
胡义华
何苗
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Guangdong University of Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
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Abstract

The application discloses a compound parabolic condenser, a method for determining size parameters of the compound parabolic condenser and a reflection cup, wherein the method comprises the following steps: determining a beam angle of light emitted by the LED light source after the light emitted by the compound parabolic condenser is reflected; and calculating the size parameter of the compound parabolic condenser according to the beam angle, the light-emitting angle of the LED light source and the focal length of the compound parabolic condenser. This application determines the size parameter of compound parabolic concentrator according to actual demand's beam angle to when the compound parabolic concentrator that utilizes this size parameter carries out the collaborative work with the LED light source of different luminous angles, all can obtain the beam angle of above-mentioned actual demand, and through relevant parameters such as adjustment focus, can realize compound parabolic concentrator space size's miniaturization, the LED light source can encapsulate.

Description

Compound parabolic condenser, method for determining size parameters of compound parabolic condenser and reflection cup
Technical Field
The invention relates to the field of compound parabolic concentrators, in particular to a compound parabolic concentrator, a method for determining size parameters of the compound parabolic concentrator and a reflecting cup.
Background
At present, various Light Emitting diodes (LEDs for short) are continuously emerging in the market, and the power and the Light Emitting angle of different types of LED Light sources are also greatly different. The light emitting angle of an LED light source affects the packability of the LED light source.
As shown in fig. 1, in the prior art, a projection type Compound Parabolic Concentrator 01 (CPC) is generally used to concentrate light of an LED light source 02 to obtain a good light-emitting angle (or beam angle), but the beam angle after being concentrated by the projection type Compound Parabolic Concentrator is large, the volume is too large, and the LED light source is not easy to package, so the above method is only applicable to the case of not packaging.
Therefore, the technical problem to be solved by those skilled in the art is how to fix the beam angle after condensing, reduce the size of the CPC space, and enable the LED light source to be packaged.
Disclosure of Invention
In view of the above, the present invention provides a compound parabolic concentrator, a method for determining a size parameter of the compound parabolic concentrator, and a reflective cup, which can obtain a fixed beam angle by using the compound parabolic concentrator with the determined size parameter, and realize the miniaturization of the space size of the compound parabolic concentrator, and the LED light source can be packaged. The specific scheme is as follows:
a method of determining a compound parabolic concentrator dimensional parameter, comprising:
determining a beam angle of light emitted by the LED light source after the light emitted by the compound parabolic condenser is reflected;
and calculating the size parameter of the compound parabolic condenser according to the beam angle, the light-emitting angle of the LED light source and the focal length of the compound parabolic condenser.
Preferably, in the method for determining the size parameter of the compound parabolic concentrator, provided by the embodiment of the present invention, the LED light source is disposed inside the compound parabolic concentrator.
Preferably, in the method for determining the size parameter of the compound parabolic concentrator, provided by the embodiment of the present invention, the LED light source is disposed at a focal point of the compound parabolic concentrator.
Preferably, in the method for determining a size parameter of a compound parabolic concentrator provided by the embodiment of the present invention, the length and the outlet width of the compound parabolic concentrator are calculated by using the following formulas:
Figure BDA0001469413430000021
wherein L represents the length of the compound parabolic concentrator; a represents the exit width of the compound parabolic concentrator; f represents the focal length of the compound parabolic concentrator; theta represents the light-emitting angle of the LED light source; ■, the beam angle.
Preferably, in the method for determining the size parameter of the compound parabolic concentrator provided by the embodiment of the present invention, a light emitting angle of the LED light source ranges from 30 ° to 75 °.
Preferably, in the method for determining a size parameter of a compound parabolic concentrator provided by an embodiment of the present invention, the method further includes:
and establishing a relation coordinate graph between the light emitting angle of the LED light source and the size parameter of the compound parabolic condenser according to the value range of the light emitting angle of the LED light source.
Preferably, in the method for determining a size parameter of a compound parabolic concentrator provided by an embodiment of the present invention, the method further includes:
and determining the size parameter of the compound parabolic condenser corresponding to the actual light-emitting angle of the LED light source according to the relation coordinate graph and the actual light-emitting angle of the LED light source, and performing simulation according to the determined size parameter.
Preferably, in the method for determining the size parameter of the compound parabolic concentrator provided by the embodiment of the present invention, the actual light emitting angle of the LED light source is half of the actual field angle of the LED light source.
The embodiment of the invention also provides a compound parabolic condenser, and the size parameter of the compound parabolic condenser is determined by adopting the method provided by the embodiment of the invention.
The embodiment of the invention also provides a reflecting cup which comprises the compound parabolic condenser provided by the embodiment of the invention.
The invention provides a compound parabolic condenser, a method for determining the size parameter of the compound parabolic condenser and a reflecting cup, wherein the method comprises the following steps: determining a beam angle of light emitted by the LED light source after the light emitted by the compound parabolic condenser is reflected; and calculating the size parameter of the compound parabolic condenser according to the beam angle, the light-emitting angle of the LED light source and the focal length of the compound parabolic condenser. According to the invention, the size parameter of the compound parabolic condenser is determined according to the actually required beam angle, so that when the compound parabolic condenser with the size parameter and the LED light sources with different light-emitting angles work cooperatively, the actually required beam angle can be obtained, and the miniaturization of the space size of the compound parabolic condenser can be realized by adjusting related parameters such as focal length, and the LED light sources can be packaged.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art apparatus including a projection compound parabolic concentrator and an LED light source;
fig. 2 is a flowchart of a method for determining a compound parabolic concentrator dimensional parameter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an apparatus including a compound parabolic concentrator and an LED light source according to an embodiment of the present invention;
FIG. 4 is a second schematic structural diagram of an apparatus including a compound parabolic concentrator and an LED light source according to an embodiment of the present invention;
FIG. 5 is a diagram of an optical path between an LED light source and a compound parabolic concentrator according to an embodiment of the present invention;
fig. 6 is a graph illustrating a relationship between a light emitting angle of an LED light source and a size parameter of a compound parabolic concentrator according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for determining the size parameter of a compound parabolic concentrator, as shown in fig. 2, comprising the following steps:
s201, determining a beam angle of light emitted by the LED light source after the light emitted by the compound parabolic condenser is reflected;
s202, calculating the size parameter of the compound parabolic condenser according to the beam angle, the light emitting angle of the LED light source and the focal length of the compound parabolic condenser.
It should be noted that, in step S201, the beam angle with a fixed angle determined by human according to actual requirements may be determined, and in the case that the beam angle is known, an LED light source needs to be selected in step S202, and a compound parabolic concentrator with a proper size can be found through calculation and analysis according to the light emitting angle of the LED light source and the focal length of the compound parabolic concentrator.
In the method for determining the size parameter of the compound parabolic condenser provided by the embodiment of the invention, firstly, a beam angle of light emitted by the compound parabolic condenser after the light emitted by the LED light source is reflected is determined; and then calculating the size parameter of the compound parabolic condenser according to the beam angle, the light-emitting angle of the LED light source and the focal length of the compound parabolic condenser. Therefore, the size parameter of the compound parabolic condenser is determined according to the actually required beam angle, so that the actually required beam angle can be obtained when the compound parabolic condenser with the size parameter and the LED light sources with different light-emitting angles work cooperatively, the compound parabolic condenser with the proper size can be found out through calculation and analysis by adjusting relevant parameters such as focal length, the miniaturization of the space size of the compound parabolic condenser can be realized, and the LED light sources can be packaged. The method can be applied to the fields of automobile illumination, extended light sources, outdoor decoration illumination and the like.
In practical implementation, in the method for determining the size parameter of the compound parabolic concentrator provided by the embodiment of the present invention, as shown in fig. 3 and 4, the LED light source 2 may be disposed inside (on the same plane) the compound parabolic concentrator 1; further, in order to make the light from the LED light source 2 substantially parallel to the light emitted from the compound parabolic condenser 1 after being reflected once, the LED light source 2 should be disposed at the focal point of the compound parabolic condenser 1, so as to ensure that the compound parabolic condenser 1 is at a small beam angle.
As shown in fig. 1, the light emitted from the LED light source 02 by the projection type compound parabolic concentrator 01 is divided into two parts: light rays reflected by the compound parabolic concentrator 01 and light rays not reflected by the compound parabolic concentrator 01; as shown in fig. 3, the compound parabolic concentrator 1 is a reflective compound parabolic concentrator, and there is only one case that all light rays are reflected by the compound parabolic concentrator 1 and then emitted, so that the compound parabolic concentrator 1 has higher controllability on the light rays and can ensure that the compound parabolic concentrator 1 has a smaller beam angle. Meanwhile, the volume of the reflecting type compound parabolic condenser is only slightly larger than half of that of the projecting type compound parabolic condenser, so that the using volume is greatly reduced.
Further, in practical implementation, in the method for determining a size parameter of a compound parabolic concentrator provided by the embodiment of the present invention, in combination with fig. 5, the length and the outlet width of the compound parabolic concentrator are calculated by using the following formulas:
Figure BDA0001469413430000051
wherein L represents the length of the compound parabolic concentrator; a denotes the exit width of the compound parabolic concentrator; f denotes the focal length of the compound parabolic concentrator; theta represents the light emitting angle of the LED light source; ■ denotes the beam angle.
As is apparent from the above formula in conjunction with fig. 5, the length L and the outlet width a of the compound parabolic concentrator can be calculated by knowing three parameters, namely the beam angle ■, the light-emitting angle θ of the LED light source, and the focal length f of the compound parabolic concentrator and substituting the three parameters into the above formula.
In practical implementation, in the method for determining the size parameter of the compound parabolic concentrator according to the embodiment of the present invention, since there is a large difference between the light emitting angles of the different types of LED light sources, the light emitting angle θ of the LED light source should be set as an independent variable, which is half of the self-viewing angle, where the light emitting angle of the LED light source may be set to be in a range from 30 ° to 75 °.
Further, in practical implementation, in the method for determining a size parameter of a compound parabolic concentrator provided in an embodiment of the present invention, the method may further include the following steps:
and establishing a relation coordinate graph between the light emitting angle of the LED light source and the size parameter of the compound parabolic condenser according to the value range of the light emitting angle of the LED light source.
It should be noted that, as shown in fig. 6, discrete values may be taken for the light-emitting angle θ of the LED light source in the above step, specifically, the sampling interval is greater than 0.1 ° between 30 ° and 75 °, so as to calculate two sets of data of the length L and the outlet width a of the compound parabolic concentrator.
Further, in practical implementation, in the method for determining a size parameter of a compound parabolic concentrator provided in an embodiment of the present invention, the method may further include the following steps:
and determining the size parameter of the compound parabolic condenser corresponding to the actual light-emitting angle of the LED light source according to the relation coordinate graph and the actual light-emitting angle of the LED light source, and performing simulation according to the determined size parameter.
The actual light emission angle of the LED light source is half of the actual angle of view of the LED light source. In practical implementation, an OSRAM LED chip of model LW-G6CP may be used, which has an actual field angle of 120 °, i.e., an actual light emission angle of 60 °. The length and the outlet width of the compound parabolic concentrator can be found in accordance with fig. 6, and then simulation can be performed in TracePro based on the data such as the found length and outlet width.
Based on the same inventive concept, the embodiment of the invention also provides a compound parabolic condenser, and the size parameter of the compound parabolic condenser is determined by adopting the method provided by the embodiment of the invention. Because the principle of solving the problem of the compound parabolic condenser is similar to the method for determining the size parameter of the compound parabolic condenser, the implementation of the compound parabolic condenser can refer to the implementation of the method for determining the size parameter of the compound parabolic condenser, and repeated details are not repeated.
Based on the same inventive concept, the embodiment of the invention further provides a reflecting cup, which comprises the compound parabolic condenser provided by the embodiment of the invention, and the implementation of the reflecting cup can refer to the implementation of determining the compound parabolic condenser, and repeated parts are not repeated.
The embodiment of the invention provides a compound parabolic condenser, a method for determining size parameters of the compound parabolic condenser and a reflecting cup, wherein the method comprises the following steps: determining a beam angle of light emitted by the LED light source after the light emitted by the compound parabolic condenser is reflected; and calculating the size parameter of the compound parabolic condenser according to the beam angle, the light-emitting angle of the LED light source and the focal length of the compound parabolic condenser. According to the invention, the size parameter of the compound parabolic condenser is determined according to the actually required beam angle, so that when the compound parabolic condenser with the size parameter and the LED light sources with different light-emitting angles work cooperatively, the actually required beam angle can be obtained, and the miniaturization of the space size of the compound parabolic condenser can be realized by adjusting related parameters such as focal length, and the LED light sources can be packaged.
Finally, it should also be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The compound parabolic concentrator, the method for determining the size parameter of the compound parabolic concentrator and the reflective cup provided by the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (9)

1. A method of determining a compound parabolic concentrator dimensional parameter, comprising:
determining a beam angle of light emitted by the LED light source after the light emitted by the compound parabolic condenser is reflected;
calculating the size parameter of the compound parabolic condenser according to the beam angle, the light-emitting angle of the LED light source and the focal length of the compound parabolic condenser;
the length and outlet width of the compound parabolic concentrator are calculated using the following equations:
Figure FDA0002274743990000011
wherein L represents the length of the compound parabolic concentrator; a represents the exit width of the compound parabolic concentrator; f represents the focal length of the compound parabolic concentrator; theta represents the light-emitting angle of the LED light source;
Figure FDA0002274743990000012
representing the beam angle.
2. The method of determining a compound parabolic concentrator dimensional parameter of claim 1, wherein the LED light source is disposed inside the compound parabolic concentrator.
3. The method of determining a compound parabolic concentrator dimensional parameter of claim 2, wherein the LED light source is disposed at a focal point of the compound parabolic concentrator.
4. The method of claim 3 wherein the emission angle of the LED light source ranges from 30 ° to 75 °.
5. The method of determining a compound parabolic concentrator dimensional parameter of claim 4, further comprising:
and establishing a relation coordinate graph between the light emitting angle of the LED light source and the size parameter of the compound parabolic condenser according to the value range of the light emitting angle of the LED light source.
6. The method of determining a compound parabolic concentrator dimensional parameter of claim 5, further comprising:
and determining the size parameter of the compound parabolic condenser corresponding to the actual light-emitting angle of the LED light source according to the relation coordinate graph and the actual light-emitting angle of the LED light source, and performing simulation according to the determined size parameter.
7. The method of determining a compound parabolic concentrator dimensional parameter of claim 6, wherein the actual lighting angle of the LED light source is half of the actual field angle of the LED light source.
8. A compound parabolic concentrator having dimensional parameters determined by the method of any one of claims 1 to 7.
9. A reflector cup comprising the compound parabolic concentrator of claim 8.
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KR20050119524A (en) * 2004-06-16 2005-12-21 황우성 Compound parabolic concentrator for uniform energy distribution on the receiver surface
CN102022834A (en) * 2010-09-28 2011-04-20 高铮 Fixed-reflector solar collector
CN102606978A (en) * 2012-02-27 2012-07-25 广东工业大学 Device and method for implementing smallest output beam angle of LED light source
CN105978478A (en) * 2016-05-04 2016-09-28 武汉理工大学 Compound parabolic concentrator based on PV/T system and design method

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
ITTO970059A1 (en) * 1997-01-27 1998-07-27 Fiat Ricerche REFLECTOR FOR LIGHTING DEVICE WITH LUMINOUS SOURCE ESTE SA.
CN103941394B (en) * 2014-04-18 2016-03-30 西安交通大学 A kind of intercept method of dull and stereotyped receiving type compound parabolic concentrator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050119524A (en) * 2004-06-16 2005-12-21 황우성 Compound parabolic concentrator for uniform energy distribution on the receiver surface
CN102022834A (en) * 2010-09-28 2011-04-20 高铮 Fixed-reflector solar collector
CN102606978A (en) * 2012-02-27 2012-07-25 广东工业大学 Device and method for implementing smallest output beam angle of LED light source
CN105978478A (en) * 2016-05-04 2016-09-28 武汉理工大学 Compound parabolic concentrator based on PV/T system and design method

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