CN212658842U - Lens and LED module - Google Patents
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- CN212658842U CN212658842U CN202021001004.9U CN202021001004U CN212658842U CN 212658842 U CN212658842 U CN 212658842U CN 202021001004 U CN202021001004 U CN 202021001004U CN 212658842 U CN212658842 U CN 212658842U
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Abstract
The utility model discloses a lens and a LED module, wherein, a lens main body; the first optical film layer is arranged on one side of the lens main body; the second optical film layer is arranged on one side, far away from the lens body, of the first optical film layer; the fourth optical film layer is arranged on the other side of the lens main body; and the fifth optical film layer is arranged on one side, far away from the lens body, of the fourth optical film layer. By providing several optical film layers, the energy of the reflected and transmitted light within the film layers is redistributed.
Description
Technical Field
The utility model belongs to the technical field of the optical element technique and specifically relates to a lens and LED module are related to.
Background
As a commonly used Light Emitting device, an LED (Light Emitting Diode) works on the principle that energy is released by recombination of electrons and holes to emit Light so as to efficiently convert electric energy into Light energy.
In conventional lighting applications, an optical transparent sheet is added on the lighting source LED to prevent dust from covering the surface of the light source LED to reduce or disable the light emitting efficiency of the light source LED. However, the conventional optical transparent sheet causes energy loss of the light source generated by the light source LED, and the energy loss needs to be compensated by increasing the operating power of the light source LED.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a lens can be through setting up a plurality of optical film layers to redistribute the energy of the intraformational reflection light of membrane and transmitted light.
The utility model discloses still provide a LED module of having above-mentioned lens.
A lens according to an embodiment of the first aspect of the present invention includes a lens main body; the first optical film layer is arranged on one side of the lens main body; the second optical film layer is arranged on one side, far away from the lens body, of the first optical film layer; the fourth optical film layer is arranged on the other side of the lens main body; and the fifth optical film layer is arranged on one side of the fourth optical film layer, which is far away from the lens main body.
According to the utility model discloses lens has following beneficial effect at least: by providing several optical film layers, the energy of the reflected and transmitted light within the film layers is redistributed.
According to some embodiments of the present invention, further comprising: the third optical film layer is arranged on one side, far away from the first optical film layer, of the second optical film layer; and the sixth optical film layer is arranged on one side, far away from the fifth optical film layer, of the fifth optical film layer.
According to some embodiments of the invention, the lens body is a spherical mirror.
According to some embodiments of the invention, the refractive index of the first optical film layer is lower than the refractive index of the second optical film layer; the refractive index of the first optical film layer is lower than the refractive index of the third optical film layer; the refractive index of the third optical film layer is lower than the refractive index of the second optical film layer.
According to some embodiments of the invention, the refractive index of the sixth optical film layer is lower than the refractive index of the fifth optical film layer; the refractive index of the sixth optical film layer is lower than the refractive index of the fourth optical film layer; the refractive index of the fifth optical film layer is lower than the refractive index of the fourth optical film layer.
According to some embodiments of the invention, the first optical film layer is a silica film layer; the second optical film layer is a zinc dioxide film layer; the third optical film layer is an aluminum oxide film layer; the fourth optical film layer is a zinc dioxide layer; the fifth optical film layer is an aluminum oxide layer; the sixth optical film layer is a silicon dioxide layer.
According to some embodiments of the invention, the refractive index of the first optical film layer is 1.46; the refractive index of the second optical film layer is 2.1; the refractive index of the third optical film layer is 1.66; the refractive index of the fourth optical film layer is 2.1; the refractive index of the fifth optical film layer is 1.66; the refractive index of the sixth optical film layer is 1.46.
According to the utility model discloses a LED module of second aspect embodiment, including the lens in the above-mentioned embodiment.
According to the utility model discloses LED module has following beneficial effect at least: by providing several optical film layers, half-wave losses are introduced to redistribute the energy of reflected and transmitted light within the film layers.
According to some embodiments of the present invention, further comprising: a substrate; and the LED chip is arranged on the substrate.
According to some embodiments of the invention, the light beam wavelength generated by the LED chip is λ; the thicknesses of the first optical film layer, the second optical film layer, the fourth optical film layer and the fifth optical film layer are all lambda/4.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a lens according to an embodiment of the present invention;
fig. 2 is a schematic view of a film structure of a lens according to an embodiment of the present invention;
fig. 3 is a top view of a lens according to an embodiment of the present invention;
fig. 4 is a schematic view of a lens assembly according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an LED module according to an embodiment of the present invention.
Reference numerals: 100. a lens; 101. a first optical film layer; 102. a second optical film layer; 103. a third optical film layer; 104. a lens body; 105. a fourth optical film layer; 106. a fifth optical film layer; 107. a sixth optical film layer; 201. a first incident ray; 202. a first reflected light beam; 203. a second incident ray; 204. a second reflected light beam; 501. an LED chip; 502. a substrate.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
In conventional lighting applications, an optical transparent sheet is added on the lighting source LED to prevent dust from covering the surface of the light source LED to reduce or disable the light emitting efficiency of the light source LED. However, the conventional optical transparent sheet causes energy loss of the light source generated by the light source LED, and the energy loss needs to be compensated by increasing the operating power of the light source LED.
Based on this, the embodiments of the present invention provide a lens and an LED module, in which the surface of the lens body is provided with a plurality of optical films to increase the energy of transmitted light and reduce the energy loss of reflected light, thereby improving the light extraction efficiency of the lens and the LED module.
It should be noted that the lens and the LED module in the following embodiments can be applied to different light source devices according to specific needs, and the thickness and material of the film layer can be adaptively replaced according to specific application environments.
Referring to fig. 1, a lens 100 includes: a lens body 104; a first optical film layer 101 disposed on one side of the lens body 104; the second optical film layer 102 is arranged on one side of the first optical film layer 101, which is far away from the lens body 104; a fourth optical film layer 105 disposed on a side of the lens body 104 away from the first optical film layer 101; the fifth optical film layer 106 is disposed on a side of the fourth optical film layer 105 away from the lens body 104.
By providing several optical film layers, half-wave losses are introduced to redistribute the energy of reflected and transmitted light within the film layers.
Wherein, half-wave loss principle: when the light beam is emitted from the light sparse medium to the light dense medium, the difference between the reflected light and the incident light is n pi. By introducing the phase difference, the light beam optical film is interfered, and the energy of the reflected light and the energy of the transmitted light are redistributed, so that the energy of the transmitted light is increased, and the energy of the reflected light is reduced.
Referring to fig. 2, in some embodiments, the lens further includes: the third optical film layer 103 is disposed on a side of the second optical film layer 102 away from the first optical film layer 101; the sixth optical film layer 107 is disposed on a side of the fifth optical film layer 106 away from the fourth optical film layer 105.
The first optical film layer 101, the second optical film layer 102 and the third optical film layer 103 form a first antireflection film layer group; fourth optical film layer 105, fifth optical film layer 106, and sixth optical film layer 107 form a second antireflection film layer group. The transmittance and light extraction efficiency of the lens 100 are increased by the arrangement of the first antireflection film layer group and the second antireflection film layer group, so that the loss of light energy when light beams are transmitted through the lens 100 is reduced.
As shown in fig. 2, the first incident light 201 enters the third optical film 103, and the first incident light 201 is reflected at the combined interface of the third optical film 103 and the second optical film 102 to generate a first reflected light beam 202; the second incident light ray 203 enters the second optical film 102 from the third optical film 103, and is reflected at the combined interface of the first optical film 101 and the second optical film 102 to generate a second reflected light beam 204. The optical path length of the first reflected light beam 202 is l, and the optical path length of the second reflected light beam 204 is l + d1Wherein d is1Is the thickness of the second optical film layer 102. When the thickness d of the second optical film layer 1021At λ/4, the optical path length difference between the first reflected beam 202 and the second reflected beam 204 is λ/2, so that the energy of the first reflected beam 202 and the second reflected beam 204 is cancelled andand partially converted into the energy of the first incident ray 201 and the second incident ray 203.
Referring also to fig. 3, in some embodiments, the lens body 104 is a flat mirror, and the outer edge of the lens body 104 is a regular circle. By providing the lens body 104 in a regular circular shape, it is advantageous to reduce the amount of offset of the optical center axis from the mechanical center axis of the lens. The light source in the device is protected by the lens 100 from external rain dust entering the device and from the user coming into contact with the charged light source. The lens body 104 is made of one or a combination of Polycarbonate (PC), polymethyl methacrylate (PMMA), and optical glass.
The lens body 104 is made of a material such as Polycarbonate (PC), polymethyl methacrylate (PMMA), or optical glass by molding, injection molding, or engraving.
In some embodiments, the lens body 104 is a spherical mirror (not shown), and the outer edge of the lens body 104 is regularly rounded. By providing the lens body 104 in a regular circular shape, it is advantageous to reduce the amount of offset of the optical center axis from the mechanical center axis of the lens 100. By reducing the offset between the optical center axis and the mechanical center axis of the lens 100, the light beam generated by the light source can be ensured to propagate along the optical center axis.
In some embodiments, the lens body 104 may be other shapes, such as rectangular, triangular, elliptical, and the like. The lens is adapted to different application scenarios by changing the structure of the lens body 104.
Referring to fig. 4, in some embodiments, the lens assembly can be applied to different light source devices by arranging and combining the lenses 100 to construct the lens assembly. As shown in fig. 4, the mechanical central axes of the lenses 100 are arranged on the same straight line.
In some modified embodiments, the arrangement of the lenses can be a rectangular array or a ring arrangement to accommodate the requirements of different light source devices.
Referring to fig. 1 and fig. 2 again, the refractive index of the first optical film 101 is lower than the refractive index of the second optical film 102; the refractive index of the first optical film layer 101 is lower than the refractive index of the third optical film layer 103; the refractive index of the third optical film layer 103 is lower than the refractive index of the second optical film layer 102.
The refractive indexes of the first optical film layer 101, the second optical film layer 102 and the third optical film layer 103 are set so that the first incident light 201 enters the first optical film layer 101 and is reflected at the bonding interface of the first optical film layer 101 (optically thinner medium) and the second optical film layer 102 (optically denser medium) to generate a first reflected light beam 202, and the first incident light 201 and the first reflected light beam 202 have a phase difference. The phase difference is pi, that is, the first incident light ray 201 and the first reflected light ray 202 have an optical path difference of lambda/2. That is, the first optical film layer 101, the second optical film layer 102, and the third optical film layer 103 constitute a first antireflection film layer group to reduce the reflectivity of the lens body 104 side.
The refractive index of the sixth optical film layer 107 is lower than the refractive index of the fifth optical film layer 106; the refractive index of the sixth optical film layer 107 is lower than the refractive index of the fourth optical film layer 105; the refractive index of the fifth optical film layer 106 is lower than the refractive index of the fourth optical film layer 105.
The refractive indexes of the fourth optical film layer 105, the fifth optical film layer 106 and the sixth optical film layer 107 are set so that the light beams sequentially penetrate through the lens body 104, the fourth optical film layer 105, the fifth optical film layer 106 and the sixth optical film layer 107 and all enter the optically thinner medium from the optically denser medium. When the light beam enters the optically thinner medium from the optically denser medium, there is no phase difference between the incident light beams and the reflected light beams generated by the reflection of the light beam at the bonding interface where the optically denser medium enters the optically thinner medium, so as to increase the transmittance of the other side of the lens body 104. The energy of the reflected light and the transmitted light in the film layers is redistributed through the first antireflection film layer group and the second antireflection film layer group, and the transmittance of the whole lens is increased.
The first optical film layer 101 is a silicon dioxide film layer; the second optical film layer 102 is a zinc dioxide film layer; the third optical film layer 103 is an aluminum oxide film layer; the fourth optical film layer 105 is a zinc dioxide layer; the fifth optical film 106 is an aluminum oxide layer; the sixth optical film layer 107 is a silicon dioxide layer. The specific materials of the first optical film layer 101, the second optical film layer 102, the third optical film layer 103, the fourth optical film layer 105, the fifth optical film layer 106, and the sixth optical film layer 107 are set to construct a symmetrical film system, so that the transmittance and the light extraction efficiency of the whole lens are improved, and the loss of light energy when a light beam propagates through the lens is reduced.
The refractive index of the first optical film layer 101 is 1.46; the refractive index of the second optical film layer 102 is 2.1; the refractive index of the third optical film layer 103 is 1.66; the refractive index of the fourth optical film layer 105 is 2.1; the refractive index of the fifth optical film layer 106 is 1.66; the refractive index of the sixth optical film layer 107 is 1.46. The refractive indexes of the first optical film layer 101 and the sixth optical film layer 107 are equal; the refractive indexes of the second optical film layer 102 and the fourth optical film layer 105 are equal; the refractive indices of the third optical film layer 103 and the fifth optical film layer 106 are equal.
Referring again to fig. 1, in some implementations, a lens includes: a lens body 104; a first optical film layer 101 disposed on one side of the lens body 104; the second optical film layer 102 is arranged on one side of the first optical film layer 101, which is far away from the lens body 104; a fourth optical film layer 105 disposed on a side of the lens body 104 away from the first optical film layer 101; the fifth optical film layer 106 is disposed on a side of the fourth optical film layer 105 away from the lens body 104.
The lens further includes: the third optical film layer 103 is arranged on one side of the second optical film layer 102 far away from the first optical film layer 101; the sixth optical film layer 107 is disposed on a side of the fifth optical film layer 106 away from the fourth optical film layer 105. The first optical film layer 101, the second optical film layer 102 and the third optical film layer 103 form a first antireflection film layer group; fourth optical film layer 105, fifth optical film layer 106, and sixth optical film layer 107 form a second antireflection film layer group. The first antireflection film layer group and the second antireflection film layer group are arranged to increase the overall transmittance and light emitting efficiency of the lens, so that the loss of light energy when light beams are transmitted through the lens is reduced.
The refractive index of the first optical film layer 101 is lower than that of the second optical film layer 102; the refractive index of the first optical film layer 101 is lower than the refractive index of the third optical film layer 103; the refractive index of the third optical film layer 103 is lower than the refractive index of the second optical film layer 102. The refractive index of the sixth optical film layer 107 is lower than the refractive index of the fifth optical film layer 106; the refractive index of the sixth optical film layer 107 is lower than the refractive index of the fourth optical film layer 105; the refractive index of the fifth optical film layer 106 is lower than the refractive index of the fourth optical film layer 105.
The first optical film layer 101 is a silicon dioxide film layer; the second optical film layer 102 is a zinc dioxide film layer; the third optical film layer 103 is an aluminum oxide film layer; the fourth optical film layer 105 is a zinc dioxide layer; the fifth optical film 106 is an aluminum oxide layer; the sixth optical film layer 107 is a silicon dioxide layer. The refractive index of the first optical film layer 101 is 1.66; the refractive index of the second optical film layer 102 is 2.1; the refractive index of the third optical film layer 103 is 1.46; the refractive index of the fourth optical film layer 105 is 2.1; the refractive index of the fifth optical film layer 106 is 1.66; the refractive index of the sixth optical film layer 107 is 1.46.
By providing several optical film layers, half-wave losses are introduced to redistribute the energy of reflected and transmitted light within the film layers.
The first optical film layer 101, the second optical film layer 102 and the third optical film layer 103 form a first antireflection film layer group; fourth optical film layer 105, fifth optical film layer 106, and sixth optical film layer 107 form a second antireflection film layer group. The first antireflection film layer group and the second antireflection film layer group are arranged to increase the overall transmittance and light emitting efficiency of the lens, so that the loss of light energy when light beams are transmitted through the lens is reduced.
Referring to fig. 5, in some embodiments, an LED module includes the lens. The lens in the embodiment is applied to the LED module to improve the light emitting efficiency of the LED module. The first antireflection film layer group and the second antireflection film layer group are arranged to increase the overall transmittance and light emitting efficiency of the lens, so that the loss of light energy when light beams are transmitted through the lens is reduced.
In some embodiments, the LED module further comprises: a substrate 502; the LED chip 501 is disposed on the substrate 502. The LED chip 501 is disposed in the extending direction of the optical center axis of the lens, and a light beam generated by the LED chip 501 is transmitted through the lens, re-distributed, and emitted.
Referring again to FIG. 2, the LED chip 501 generatesThe wavelength of the light beam is lambda; the thicknesses of the first optical film layer 101, the second optical film layer 102, the third optical film layer 103, the fourth optical film layer 105, the fifth optical film layer 106 and the sixth optical film layer 107 are all lambda/4. 1/4 that the thicknesses of the first optical film layer 101, the second optical film layer 102, the third optical film layer 103, the fourth optical film layer 105, the fifth optical film layer 106 and the sixth optical film layer 107 are all the wavelengths of the light beams generated by the LED chip 501 are set, so that the first incident light 201 enters the third optical film layer 103, and the first incident light 201 is reflected at the combined interface of the third optical film layer 103 and the second optical film layer 102 to generate a first reflected light beam 202; the second incident light ray 203 enters the second optical film 102 from the third optical film 103, and is reflected at the combined interface of the first optical film 101 and the second optical film 102 to generate a second reflected light beam 204. The optical path length of the first reflected light beam 202 is l, and the optical path length of the second reflected light beam 204 is l + d1Wherein d is1Is the thickness of the second optical film layer 102. When the thickness d of the second optical film layer 1021At λ/4, the optical path length difference between the first reflected light beam 202 and the second reflected light beam 204 is λ/2, so that the energy of the first reflected light beam 202 and the energy of the second reflected light beam 204 are cancelled and partially converted into the energy of the first incident light beam 201 and the second incident light beam 203.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A lens, comprising:
a lens body;
the first optical film layer is arranged on one side of the lens main body;
the second optical film layer is arranged on one side, far away from the lens body, of the first optical film layer;
the fourth optical film layer is arranged on one side, far away from the first optical film layer, of the lens body;
and the fifth optical film layer is arranged on one side of the fourth optical film layer, which is far away from the lens main body.
2. The lens of claim 1, further comprising: the third optical film layer is arranged on one side, far away from the first optical film layer, of the second optical film layer;
and the sixth optical film layer is arranged on one side of the fifth optical film layer, which is far away from the fourth optical film layer.
3. The lens of claim 2, wherein the lens body is a spherical mirror or a planar mirror.
4. The lens of claim 2, wherein the first optical film layer has a refractive index lower than the refractive index of the second optical film layer;
the refractive index of the first optical film layer is lower than the refractive index of the third optical film layer;
the refractive index of the third optical film layer is lower than the refractive index of the second optical film layer.
5. The lens of claim 2, wherein the refractive index of the sixth optical film layer is lower than the refractive index of the fifth optical film layer;
the refractive index of the sixth optical film layer is lower than the refractive index of the fourth optical film layer;
the refractive index of the fifth optical film layer is lower than the refractive index of the fourth optical film layer.
6. The lens of claim 5, wherein the first optical film layer is a silicon dioxide film layer;
the second optical film layer is a zinc dioxide film layer;
the third optical film layer is an aluminum oxide film layer;
the fourth optical film layer is a zinc dioxide layer;
the fifth optical film layer is an aluminum oxide layer;
the sixth optical film layer is a silicon dioxide layer.
7. The lens of claim 5, wherein the first optical film layer has a refractive index of 1.46;
the refractive index of the second optical film layer is 2.1;
the refractive index of the third optical film layer is 1.66;
the refractive index of the fourth optical film layer is 2.1;
the refractive index of the fifth optical film layer is 1.66;
the refractive index of the sixth optical film layer is 1.46.
8. An LED module comprising the lens of any one of claims 1 to 7.
9. The LED module of claim 8, further comprising:
a substrate;
and the LED chip is arranged on the substrate.
10. The LED module of claim 9, wherein the LED chip generates a light beam having a wavelength λ;
the thicknesses of the first optical film layer, the second optical film layer, the fourth optical film layer and the fifth optical film layer are all lambda/4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021001004.9U CN212658842U (en) | 2020-06-03 | 2020-06-03 | Lens and LED module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021001004.9U CN212658842U (en) | 2020-06-03 | 2020-06-03 | Lens and LED module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212658842U true CN212658842U (en) | 2021-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021001004.9U Active CN212658842U (en) | 2020-06-03 | 2020-06-03 | Lens and LED module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212658842U (en) |
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2020
- 2020-06-03 CN CN202021001004.9U patent/CN212658842U/en active Active
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