Disclosure of Invention
An object of the present invention is to provide a light condensing apparatus capable of improving a condensing ratio with respect to a ring-shaped light source, thereby achieving a good condensing effect.
Another object of the present invention is to provide a light condensing method capable of improving a condensing ratio of an opposite light source to perform a good condensing effect.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the invention provides a light condensing device which is used for condensing light rays of an annular light source and comprises an annular first light condensing part and an annular second light condensing part, wherein the first light condensing part is arranged on the periphery of the second light condensing part in a surrounding mode, the first light condensing part and the second light condensing part are arranged at intervals, a light path channel is formed between the first light condensing part and the second light condensing part, an incident port and an exit port are formed in two ends of the light path channel, and the first light condensing part and the second light condensing part are respectively used for reflecting the light rays incident from the incident port and condensing the light rays at the exit port.
Further, the area of the exit port is smaller than the area of the entrance port.
Furthermore, the first light gathering part is provided with a first light gathering surface in a concave shape, the second light gathering part is provided with a second light gathering surface in a concave shape, and the first light gathering surface and the second light gathering surface are arranged oppositely.
Further, the first light-gathering surface and the second light-gathering surface are both paraboloids.
Further, the first light gathering member and the second light gathering member are coaxially arranged.
Further, the first light gathering part is used for reflecting edge light rays outside the annular light source and forming reflected light rays, so that the reflected light rays are tangent to the circumference of the exit port.
Further, the second light condensing part is used for reflecting the edge light rays on the inner side of the annular light source and forming reflected light rays, so that the reflected light rays are tangent to the circumference of the exit port.
Further, the calculation formula of the theoretical geometric concentration ratio of the light-condensing device is as followsWherein C denotes the theoretical geometric concentration ratio of the light-gathering device, SinRefers to the area of the entrance port, SoutRefers to the area of the exit port.
Further, the light condensing device further comprises a receiver, wherein the receiver is arranged at the exit port and is used for receiving the light rays condensed by the first light condensing part and the second light condensing part.
The invention also provides a light condensation method, which is used for condensing the light of the surface light source, the edge of the surface light source is enclosed to form a light source curved surface with a boundary, and the light source curved surface can be obtained by translating or rotating a line segment; the light condensation method comprises the following steps: selecting a first parabola and a second parabola which are symmetrical on the plane where the line segment is located; wherein the plane is different from the light source curved surface. If the light source curved surface can be obtained through the line segment translation, the first parabola is translated according to the line segment translation direction and distance to obtain a first curved surface, and the second parabola is translated according to the line segment translation direction and distance to obtain a second curved surface. If the light source curved surface can be obtained through the line segment rotation, the first parabola is rotated according to the direction and the distance of the line segment rotation to obtain a first curved surface, and the second parabola is rotated according to the direction and the distance of the line segment rotation to obtain a second curved surface. Manufacturing a first light gathering piece and a second light gathering piece according to the shapes of the first curved surface and the second curved surface; the first curved surface is arranged on the first light gathering part, the second curved surface is arranged on the second light gathering part, the first curved surface and the second curved surface are arranged oppositely, a light path channel is formed between the first light gathering part and the second light gathering part, and an incident port and an emergent port are formed at two ends of the light path channel. Setting the first light gathering part and the second light gathering part according to the relative positions of the first curved surface, the second curved surface and the light source curved surface; the first light gathering part and the second light gathering part are respectively used for reflecting the light rays emitted from the incident port and gathering the light rays at the emergent port.
The embodiment of the invention has the beneficial effects that:
the light condensing device provided by the invention has the advantages that the annular first light condensing part and the annular second light condensing part are oppositely arranged at intervals, so that the light path channel with the incident port and the emergent port is formed between the first light condensing part and the second light condensing part, the light rays incident from the incident port are respectively reflected by the first light condensing part and the second light condensing part, and the light rays are condensed at the emergent port. Therefore, the light condensing device can improve the light condensing ratio of the annular light source to play a good light condensing role.
The light-gathering method provided by the invention can be used for translating the first parabola and the second parabola coplanar with the line segments according to the translation or rotation direction and distance to form the first curved surface and the second curved surface of the surface light source obtained by translating or rotating the line segments on the curved surface of the light source. And manufacturing a first light gathering piece and a second light gathering piece according to the shapes of the first curved surface and the second curved surface, and setting the positions of the first light gathering piece and the second light gathering piece according to the relative positions of the first curved surface, the second curved surface and the light source curved surface. Therefore, the light rays emitted from the edge of the surface light source are reflected to form reflected light rays through the reflection of the first light-gathering piece and the second light-gathering piece, and the reflected light rays are tangent to the circumference of the exit port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships where products of the present invention are conventionally placed in use, and are used only for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the device or the element to which the present invention refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and "fourth," etc. are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise specified or limited more specifically, the terms "disposed" and "connected" are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the following, an embodiment of the present invention will be described in detail with reference to the drawings, and features in the following embodiments may be combined with each other without conflict.
It should be noted that the light condensing device 100 provided by the present invention is applied to condensing light, and in order to better explain the operation principle of the light condensing device 100, the light condensing system 300 is introduced for explanation.
Fig. 1 is a schematic structural diagram of a light-condensing system 300 according to the present invention. Referring to fig. 1, the light condensing system 300 includes a ring light source 200 and a light condensing device 100. Wherein, the ring-shaped light source 200 and the light-gathering device 100 are correspondingly arranged so as to gather the light emitted by the ring-shaped light-gathering device 100.
In the present embodiment, the annular light source 200 and the light condensing device 100 are coaxially disposed to ensure uniformity of light condensing and enhance light condensing effect.
Note that the arrow direction indicates the light direction.
Fig. 2 is a schematic view of a reflection light path of the light condensing device 100 provided by the present invention, and fig. 3 is a schematic view of a structure of the light condensing device 100 provided by the present invention, please refer to fig. 2 and fig. 3 in combination. The light-condensing device 100 is used for condensing light of the ring-shaped light source 200 and comprises a receiver 130, a ring-shaped first light-condensing element 110 and a ring-shaped second light-condensing element 120. The first light gathering part 110 and the second light gathering part 120 are oppositely arranged at intervals, a gap between the first light gathering part 110 and the second light gathering part 120 forms a light path channel, and two ends of the light path channel are respectively provided with an incident port 140 and an exit port 150. The first light gathering member 110 and the second light gathering member 120 are used for reflecting the light incident from the incident port 140 and gathering the light to the exit port 150. So that the light is incident from the incident port 140, reflected by the first light gathering member 110 and the second light gathering member 120, and then emitted from the exit port 150, thereby achieving the light gathering effect.
It should be noted that, in the present embodiment, the annular light source 200, the first light gathering member 110 and the second light gathering member 120 are coaxially disposed, so as to further improve the uniformity of light gathering.
Wherein,is the maximum acceptance angle of the light-focusing device 100, D is the entrance diameter of the light-focusing device 100, h is the distance between the light-focusing device 100 and the light source, Os is the center of the annular light source 200, l1Is the inner diameter, l, of the annular light source 2002D1 is the outer diameter of the annular light source 200, and d is the distance from the end of the second light-focusing member 120 near the exit 150 to the axis of the annular light source 2002The distance between one end of the first light-gathering part 110 close to the exit 150 and the axis of the annular light source 200, d3Refers to the distance between one end of the second light-gathering member 120 close to the incident port 140 and the axis of the ring-shaped light source 200, d4Refers to the distance between one end of the first light gathering part 110 close to the entrance port 140 and the axis of the ring light source 200.
It should be noted that, in this embodiment, the light condensing device 100 further includes a receiver 130, and the receiver 130 is disposed at the exit 150 to receive the light condensed by the first light condensing element 110 and the second light condensing element 120.
Optionally, in this embodiment, the receiver 130 covers the exit port 150 to ensure all light reception and improve the light collection efficiency.
It is understood that in other alternative embodiments, the receiver 130 may also partially cover the exit port 150 according to actual needs, so as to flexibly adjust the specification and configuration of the receiver 130.
Note that, in the present embodiment, the area of the exit port 150 is smaller than the area of the entrance port 140. Since the ultimate requirement of a non-imaging concentrator design is to achieve maximum intensity of light per unit area, it is essential to concentrate the light from a large entrance face to a small exit face to achieve the concentrating effect.
The first light gathering member 110 has a concave first light gathering surface 111, the second light gathering member 120 has a concave second light gathering surface 121, and the first light gathering surface 111 and the second light gathering surface 121 are disposed opposite to each other, so as to achieve a good light gathering effect.
Alternatively, in this embodiment, the first light-gathering surface 111 and the second light-gathering surface 121 are both paraboloids to form an annular compound paraboloid light-gathering device, so that all light rays incident at an angle not greater than the maximum acceptance angle of the light-gathering device 100 can be received by the light-gathering device 100 and gathered at the receiver 130.
It should be noted that the theoretical geometric concentration ratio of the annular compound parabolic concentrator is as follows:
wherein C denotes the concentration ratio, SinRefers to the area of the entrance port 140, SoutIndicating the area of the ejection opening 150.
The first light-gathering surface 111 and the second light-gathering surface 121 are symmetrically arranged to further improve the light gathering effect.
Optionally, in this embodiment, the radius of the first light gathering part 110 is larger than that of the second light gathering part 120, and the first light gathering part 110 is used for reflecting edge light rays outside the ring light source 200 and forming reflected light rays, so that the reflected light rays are tangential to the circumference of the exit port 150; the second light-condensing member 120 is used for reflecting the edge light inside the ring light source 200 and forming the reflected light so that the reflected light is tangential to the circumference of the exit port 150.
It should be noted that, according to the edge ray principle: all the light rays incident at the maximum angle, i.e. the edge light rays, are emitted from the edge of the exit port 150 after the maximum reflection, the light rays incident at the intermediate angle are reflected into the exit port 150 and received by the receiver 130, so as to achieve the purpose of increasing the energy density of the light beam and keeping the total energy constant.
It should also be noted that, in the present embodiment, the marginal rays emitted from the inner side and the outer side of the ring-shaped light source 200 enter the incident port 140, and the incident angle is just the maximum receiving angle of the ring-shaped compound parabolic concentrator by adjusting the relative positions of the first light-collecting part 110 and the second light-collecting part 120 with respect to the ring-shaped light source 200. So that the marginal rays are reflected to the marginal points of the outlet by the first light-gathering surface 111 and the second light-gathering surface 121, and at this time, the rays between the marginal rays are reflected to the middle of the receiver 130 by the first light-gathering surface 111 and the second light-gathering surface 121, so as to gather the light, thereby achieving the purpose of improving the energy density of the light beam.
Wherein the maximum acceptance angle is determined by the parabolic characteristics and material characteristics of the first light collection surface 111 and the second light collection surface 121.
It should be noted that, compared to the non-annular compound parabolic concentrator, the theoretical geometric concentration ratio of the non-annular compound parabolic concentrator is:
wherein C' is the concentration ratio of the non-annular compound parabolic condenser, and isIs the maximum acceptance angle of the compound parabolic concentrator.
As an example, given a set of parameters: h 500mm, l1=200m,l2=2000m,d110mm and 21mm, and the angle between the entrance of the light-collecting device 100 and the horizontal plane is calculated according to the formula (1) to be α -48.6 °, and the maximum receiving angle isThe condensing ratio of the annular compound parabolic condenser apparatus 100 is thus obtained as C6.4.
If a non-annular compound parabolic condenser is adopted, the light rays between the edge light rays can be condensed, so that the light rays are easy to knowThe concentration ratio calculated according to the formula (2) is only C' ═ 1/sin274.5°=1.08。
In the present embodiment, the total light intensity 29.978W and the average illuminance 9751.6W/m were obtained by modeling and simulating the light collecting device 100 using TracePro software2Total light intensity 27.727W of its emergent face, average light intensity 51935W/m2The concentration ratio was calculated to be 5.33. Because the incident beam has a certain angle, when the incident beam reaches the incident plane of the annular compound parabolic condenser, the light spot is large, so that a part of oblique incident beam can be reflected twice or more and then emitted from the inlet, and loss is caused. Simulation results show that the light condensation effect of the annular compound parabolic concentrator on the annular light source 200 is far better than that of a non-annular compound parabolic concentrator.
Fig. 4 is a schematic flow chart of a light condensing method provided by the present invention. Referring to fig. 2 and 4, the light condensing method is used to condense the light of the surface light source, the edge of the surface light source is enclosed to form a light source curved surface with a boundary, and the light source curved surface can be obtained by translating or rotating a line segment. The light condensation method comprises the following steps:
s100: and selecting a first parabola and a second parabola which are symmetrical on the plane of the line segment.
It should be noted that, in the present embodiment, the plane is different from the curved surface of the light source, i.e. the plane is prevented from being overlapped with the curved surface of the light source.
S200: if the light source curved surface can be obtained through line segment translation, the first parabolic line is translated according to the line segment translation direction and distance to obtain a first curved surface, and the second parabolic line is translated according to the line segment translation direction and distance to obtain a second curved surface.
In this embodiment, the first curved surface corresponds to the first light-gathering surface 111, and the second curved surface corresponds to the second light-gathering surface 121.
S300: if the light source curved surface can be obtained through line segment rotation, the first parabolic curve is rotated according to the rotation direction and distance of the line segment to obtain the first curved surface, and the second parabolic curve is rotated according to the rotation direction and distance of the line segment to obtain the second curved surface.
In the present embodiment, the ring-shaped light condensing device 100 is rotated.
S400: the first light condensing element 110 and the second light condensing element 120 are fabricated according to the shapes of the first curved surface and the second curved surface.
It should be noted that, in this embodiment, the first curved surface is disposed on the first light gathering member 110, the second curved surface is disposed on the second light gathering member 120, the first curved surface and the second curved surface are disposed opposite to each other, and the incident port 140 and the exit port 150 are respectively formed between the first light gathering member 110 and the second light gathering member 120.
S500: the first condensing member 110 and the second condensing member 120 are disposed according to the relative positions of the first curved surface, the second curved surface, and the light source curved surface.
In the present embodiment, the first light gathering part 110 is used for reflecting the edge light of one side of the surface light source and forming a reflected light, so that the reflected light is tangent to the circumference of the exit 150, and the second light gathering part 120 is used for reflecting the edge light of the other side of the surface light source and forming a reflected light, so that the reflected light is tangent to the circumference of the exit 150.
It should be noted that, light condensing devices 100 with different shapes can be formed according to different shapes of light sources, and the annular light condensing device 100 shown in the present embodiment is only a specific design for the annular light source 200.
It is understood that, in other alternative embodiments, if the shape of the light source is changed to a strip light source, the light-condensing device 100 may also be configured to be strip-shaped, and the cross section of the light-condensing device is a symmetrical double parabola, so as to achieve a good light-condensing effect.
In summary, the light condensing device 100 provided by the present invention is configured such that the annular first light condensing element 110 and the annular second light condensing element 120 are oppositely disposed at an interval, so as to form an optical path channel having an incident port 140 and an exit port 150 at two ends respectively in a gap between the first light condensing element 110 and the second light condensing element 120. So that the light incident from the incident port 140 is reflected by the first condensing member 110 and the second condensing member 120, respectively, and is condensed at the exit port 150. Thereby enabling the light condensing apparatus 100 to improve the light condensing ratio with respect to the ring-shaped light source 200 to perform a good light condensing function.
The light condensing system 300 provided by the present invention employs the light condensing device 100 provided by the present invention, and the annular first light condensing member 110 and the annular second light condensing member 120 are oppositely disposed at an interval, so that the incident port 140 and the exit port 150 are respectively formed between the first light condensing member 110 and the second light condensing member 120, so that the light incident from the incident port 140 is reflected by the first light condensing member 110 and the second light condensing member 120, respectively, and the light is condensed at the exit port 150. Meanwhile, the annular light source 200, the first light gathering member 110 and the second light gathering member 120 are coaxially arranged, so that the light gathering device 100 can improve the light gathering ratio of the annular light source 200 to achieve a good light gathering effect.
According to the light condensation method provided by the invention, for the surface light source of which the light source curved surface can be obtained by translating or rotating a line segment, a first parabola and a second parabola coplanar with the line segment are translated according to the translation or rotation direction and distance to form a first curved surface and a second curved surface. The first light gathering member 110 and the second light gathering member 120 are manufactured according to the shapes of the first curved surface and the second curved surface, and the positions of the first light gathering member 110 and the second light gathering member 120 are set according to the relative positions of the first curved surface, the second curved surface and the curved surface of the light source. So that the light emitted from the edge of the surface light source is reflected to form a reflected light by the reflection of the first and second light-focusing members 110 and 120, and the reflected light is tangential to the circumference of the exit port 150.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.