CN101626053B - Aspherical positive irradiation-angle optical lens and light-emitting diode (LED) component formed by same - Google Patents

Abstract

The invention discloses an aspherical positive irradiation-angle optical lens and a light-emitting diode (LED) component formed by the same. The aspherical optical lens is provided with a concave surface on the light source side and a convex surface on the imaging side, and the LED component formed by the aspherical optical lens can focus the light emitted by an LED chip and can form the round light having the positive irradiation angle of more than 72 degrees and less than 108 degrees with uniform strength. Therefore, the light emitted by an LED can be focused into a preset shape by only one aspherical optical lens, and the aspherical positive irradiation-angle optical lens and the LED component formed by the same can achieve the luminous flux ratio of more than 85 percent and can be used for the illumination and the flash lamp of the cell phone or the camera.

Description

Aspheric positive illumination angle optical lens and light emitting diode assembly formed by same

Technical Field

The invention relates to an aspheric surface positive illumination angle optical lens and a light emitting diode component formed by the aspheric surface positive illumination angle optical lens, in particular to an optical lens applied to an LED luminous source to generate light and a light emitting diode component formed by the optical lens, which can be applied to LED illumination, a flash lamp of a mobile phone or a camera.

Background

Light Emitting Diodes (LEDs) have the advantages of low voltage, low power consumption, and long life, and have been widely used in the fields of displays (indicators), lighting (illuminators), and the like. Since the LED also has the characteristics of simple color of light and miniaturization and planar packaging, it has been used in a flash lamp of a camera of a mobile phone. However, since the LED chip is a point light source and the emitted light has a non-uniform brightness, researchers have conducted many researches on the collection of light, and the use of optical lenses is an important technical development direction besides the reduction of the chip size and the improvement of the light emitting efficiency.

The design of LED optical lenses can be divided into primary optical lenses (primary optical lenses) and secondary optical lenses (secondary optical lenses). The primary optical lens is a lens directly packaged on the LED chip, and generally focuses on concentrated (concentrated) light; secondary optics are used in single or multiple LED arrays (Array) to spread the light beam primarily. In the design of known primary optical lenses, such as ES2157829, symmetric aspherical lenses are used; japanese patents JP3032069, JP2002-111068, JP2005-203499, US2006/187653, Chinese patent CN101013193 and the like use spherical lenses; JP2002-221658 uses a spherical lens or the like for a Bulk (Bulk) type LED. In the aspect of high-order application, the primary optical lens is required to be capable of collecting light, and also capable of generating specific light patterns (distribution patterns) with uniform light intensity (peak intensity), for example, special light patterns such as large-angle, small-angle, circular, elliptical and the like, so as to be used in combination with the LED array, thereby generating the optimal optical effect. As shown in fig. 1, a lens 23 is covered on an LED chip 21, and when the LED chip 21 emits light, the light is collected by the lens 23 to emit a predetermined light pattern. In the prior art, applications of the primary optical lens are as in japanese patents JP2004-356512, JP2005-229082, JP2006-072874, JP2007-140524, JP2007-115708, and the like; U.S. Pat. Nos. US2005/162854, US2006/105485, US2006/076568, US2007/114551, US2007/152231, US7,344,902, US7,345,416, US7,352,011; taiwan patent TW M332796 and others use optical lenses to produce light patterns; further, Japanese patent JP60007425, U.S. Pat. No. WO/2007/100837 produce an elliptical light pattern, etc.; or a rectangular, square or stripe pattern of light, such as that produced by chinese patent 200710118965.0, of less than 160 degrees.

With the progress of science and technology, electronic products are gradually developed toward light weight, thinness, shortness, and multiple functions, and in the electronic products, devices such as Digital Still cameras (Digital Still cameras), computer cameras (pccameras), Network cameras (Network cameras), mobile phones (mobile phones) and the like have lenses, and in addition, devices such as Personal Digital Assistants (PDAs) and the like are required to be added with lenses. Therefore, the LED flash lamp or the LED lamp for illumination used in such products often uses a single or multiple LED modules to form an array, and in order to be portable and meet the requirement of humanization, the LED flash lamp or the LED lamp for illumination not only needs to meet the required luminous flux, but also needs to have smaller volume and lower cost to match with the LED modules of different light types. In the requirement of the primary optical lens of the LED, the optical lens with a complex shape or a diffraction surface in the prior art has the disadvantages of difficult manufacturing, plastic injection deformation, difficult glass molding or high cost, etc. Therefore, the LED lens is simple in appearance and easy to manufacture, light emitted by the LED can be gathered, and a round LED assembly with a front illumination angle larger than 72 degrees and smaller than 108 degrees can be generated with uniform light intensity (peak intensity), and the luminous flux ratio value meets the requirement of being larger than 85%, so that the LED lens meets the urgent requirement of a user.

Disclosure of Invention

The invention mainly aims to provide an aspheric positive illumination angle optical lens which is applied to an LED component. The LED assembly comprises a light emitting diode chip (LED die), an optical lens and a sealing adhesive (seal gel), wherein the light emitting diode chip is used for emitting light, the optical lens is used for gathering the light and forming a circular light type with a positive illumination angle larger than 72 degrees and smaller than 108 degrees with uniform light intensity, and the sealing adhesive is filled between the optical lens and the light emitting diode chip. The optical lens is a lens made of an optical material and having a concave surface and a convex surface, wherein the concave surface is a light source side optical surface facing a light source, the convex surface is an image side optical surface facing an image side, at least one of the concave surface and the convex surface is an aspherical optical surface, and the following conditions can be satisfied:

<math><mrow> <mn>0.7</mn> <mo>&le;</mo> <mo>|</mo> <mfrac> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <mo>-</mo> <msub> <mi>R</mi> <mn>2</mn> </msub> </mrow> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>R</mi> <mn>2</mn> </msub> </mrow> </mfrac> <mo>|</mo> <mo>&le;</mo> <mn>1.0</mn> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow></math>

<math><mrow> <mn>8</mn> <mo>&le;</mo> <mfrac> <msup> <msub> <mi>R</mi> <mn>1</mn> </msub> <mn>2</mn> </msup> <mrow> <mn>3</mn> <mo>&CenterDot;</mo> <msub> <mi>d</mi> <mn>2</mn> </msub> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> </mrow> </mfrac> <mo>&le;</mo> <mn>180</mn> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow></math>

<math><mrow> <mn>0.2</mn> <mo>&le;</mo> <mrow> <mo>(</mo> <msub> <mi>N</mi> <mrow> <mi>d</mi> <mn>2</mn> </mrow> </msub> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mfrac> <msub> <mi>d</mi> <mn>2</mn> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>&le;</mo> <mn>0.4</mn> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>3</mn> <mo>)</mo> </mrow> </mrow></math>

wherein fs is the length of the effective focal length (effective focal length) of the optical lens, R₁Is the radius of curvature, R, of the light source-side optical surface₂Is the radius of curvature of the image-side optical surface, d₂Is the thickness of the optical lens along the central axis, N_d2Is the refractive index of the optical lens.

In order to simplify the manufacturing process, the above-described optical lens may be replaced with a plano-convex optical lens whose plane is a light source side optical surface facing the light source, whose convex surface is an image side optical surface facing the image side, which is an aspheric surface, and the conditions of equations (3) and (4) may be satisfied:

<math><mrow> <mn>0.2</mn> <mo>&le;</mo> <mrow> <mo>(</mo> <msub> <mi>N</mi> <mrow> <mi>d</mi> <mn>2</mn> </mrow> </msub> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mfrac> <msub> <mi>d</mi> <mn>2</mn> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>&le;</mo> <mn>0.4</mn> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>3</mn> <mo>)</mo> </mrow> </mrow></math>

<math><mrow> <mn>0.5</mn> <mo>&le;</mo> <mfrac> <mrow> <mo>(</mo> <msub> <mi>d</mi> <mn>0</mn> </msub> <mo>+</mo> <msub> <mi>d</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>d</mi> <mn>2</mn> </msub> <mo>)</mo> </mrow> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>&lt;</mo> <mn>1.2</mn> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>4</mn> <mo>)</mo> </mrow> </mrow></math>

wherein fs is the length of the effective focal length of the optical lens, N_d2Is the refractive index, R, of the optical lens₂Is the radius of curvature of the image-side optical surface, d₀Is the thickness of the LED chip along the central axis, d₁Is a distance along the central axis from the surface of the LED chip to the light source side optical surface of the optical lens, d₂Is the thickness of the optical lens along the central axis.

It is another object of the present invention that the optical lens can be made of optical glass or optical plastic for ease of use selection.

Another objective of the present invention is to provide an led assembly comprising an led chip and the aspheric wide-angle led optical lens of the present invention, wherein the led assembly has a circular light pattern with a positive illumination angle greater than 72 ° and less than 108 °, and the luminous flux ratio satisfies the requirement of greater than 85% (β/α ≧ 85%), and satisfies the following conditions:

wherein,

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>6</mn> <mo>)</mo> </mrow> </mrow></math>

wherein fs is the length of the effective focal length of the optical lens, fg is the length of the relative focal length of the optical lens, R₁Is the radius of curvature, R, of the light source-side optical surface₂Is the curvature radius of the image side optical surface, 2 omega is the maximum angle of the light emitted by the LED chip symmetrical with the central axis,

the maximum angle of the light emitted through the optical lens is symmetric about the central axis, α is the luminous flux of the light emitted from the LED chip, and β is the luminous flux of the light at the image side at a relatively infinite distance (100 times fs).

Therefore, the aspheric surface positive illumination angle optical lens and the light emitting diode component formed by the aspheric surface positive illumination angle optical lens can have a positive illumination angle circular light type of more than 72 degrees and less than 108 degrees, meet the requirement that the luminous flux ratio is more than 85 percent, have the advantages of simple shape, thin thickness and easy manufacture, can be used for a single LED or an array LED, and can be used for illumination or a flashlight of a mobile phone and a flashlight of a camera.

Drawings

FIG. 1 is a schematic diagram of a prior art LED optical lens used in an LED assembly;

FIG. 2 is a schematic diagram of an application of the LED optical lens of the present invention in an LED assembly;

FIG. 3 is a schematic diagram of the optical path of the LED optic of the present invention in an LED assembly;

FIG. 4 is a schematic diagram of the application of the plano-convex LED optical lens of the present invention in an LED assembly;

FIG. 5 is a schematic optical path diagram of the plano-convex LED optical lens of the present invention applied in an LED assembly;

FIG. 6 is a polar plot of light intensity distribution versus illumination angle for a first embodiment of the LED assembly of the present invention;

FIG. 7 is a polar plot of light intensity distribution versus illumination angle for a second embodiment of an LED assembly in accordance with the present invention;

FIG. 8 is a polar plot of light intensity distribution versus illumination angle for a third embodiment of an LED assembly in accordance with the present invention;

FIG. 9 is a polar plot of light intensity distribution versus illumination angle for a fourth embodiment of an LED assembly in accordance with the present invention;

FIG. 10 is a polar plot of light intensity distribution versus illumination angle for a fifth embodiment of an LED assembly in accordance with the present invention;

FIG. 11 is a polar plot of light intensity distribution versus illumination angle for a sixth embodiment of an LED assembly in accordance with the present invention;

FIG. 12 is a polar plot of light intensity distribution versus illumination angle for an LED assembly according to a seventh embodiment of the present invention;

fig. 13 is a polar coordinate diagram of light intensity distribution versus illumination angle for an LED assembly according to an eighth embodiment of the present invention.

[ description of the main element reference numerals ]

10: an LED assembly (LED assembly);

11. 21: an LED chip;

12: sealing;

13: optical lenses (optical lenses);

14: an optical lens;

23: a lens;

R₁: a light source side optical surface (optical surface on source side) or a radius of curvature (radius) thereof;

R₂: an image-side optical surface (optical surface on image side) or a radius of curvature thereof;

d₀: a thickness of the LED chip along the central axis;

d₁: a distance from the LED chip surface to an optical surface of the optical lens on the light source side along the central axis;

d₂: a thickness of the optical lens along the central axis;

ω: half of the maximum angle of the light emitted by the LED chip;

: the optical lens emits half of the maximum angle of the light pattern;

N_d: a refractive index;

ν_d: an Abbe number;

α: luminous flux of light emitted by the LED chip;

beta: the luminous flux of a ray at the image side relatively at infinity.

Detailed Description

In order to make the present invention more clear and detailed, preferred embodiments are described below, together with the following drawings, to describe the structure and technical features of the present invention in detail:

fig. 2 is a schematic structural diagram of an aspheric positive illumination angle optical lens and a light emitting diode assembly 10 formed by the aspheric positive illumination angle optical lens according to the present invention. The LED assembly 10 includes LED chips 11, a sealant 12, and an optical lens 13 arranged in order from a light source to an image side along a central axis Z. After the light is emitted from the LED chip 11 and passes through the sealant 12, the light is collected by the optical lens 13 and forms a light beam of a circular light type with a positive illumination angle larger than 72 ° and smaller than 108 ° symmetrical with respect to the central axis Z, so as to illuminate the image side; the optical lens 13 is a lens made of an optical material having a concave surface and a convex surface, the concave surface being a light source side optical surface R facing the light source₁The convex surface of the optical lens is an image side optical surface R facing the image side₂And at least one of the concave and convex optical surfaces is aspheric. Optical surface R of optical lens 13₁And R₂And the length of the effective focal length satisfies the conditions of formula (1), formula (2) and formula (3), the angle 2 omega emitted by the LED chip 11 and the angle of the light form formed by the light intensity formed by the optical lens 13The condition of formula (5) is satisfied.

The material of the molding compound 12 is not limited, and various materials such as optical resin (resin) or silicone gel (silicone gel) are commonly used for the LED assembly.

Fig. 4 is a schematic view of the plano-convex optical lens of the present invention applied in an LED assembly, in which an LED chip 11, a sealant 12 and a plano-convex optical lens 14 are sequentially arranged along a central axis Z from a light source to an image side. Light is emitted from the LED chip 11After exiting through the sealing compound 12, the optical lens 14 collects light and forms a light beam of a circular light type with a positive illumination angle larger than 72 ° and smaller than 108 ° symmetrical with respect to the central axis Z, so as to illuminate the image side. The optical lens 14 is a lens made of an optical material, and its plane is a light source side optical surface R facing the light source₁The convex surface of the optical lens is an image side optical surface R facing the image side₂Optical surface R₂Is aspheric. Optical surface R of optical lens 14₁And R₂And the length of the effective focal length satisfies the conditions of the formula (3) and the formula (4), and the angle 2 omega emitted by the LED chip 11 and the angle of the light form formed by the light intensity formed by the optical lens 13

The condition of formula (5) is satisfied.

Referring to fig. 2 and 4, if the optical surface R of the optical lens 13 is₁And R₂Or the optical surface R of the optical lens 14₂When the aspheric Surface is formed as an aspheric optical Surface, the aspheric Surface equation (aspheric Surface Formula) is expressed by Formula (7):

$Z=\frac{{\mathrm{<figure-callout\; id="2"\; label="ch"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">ch</figure-callout>}}^2}{1+\sqrt{(1-(1+K)c^2{h}^2)}}+A_4{\mathrm{<figure-callout\; id="4"\; label="h"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">h</figure-callout>}}^4+A_6{\mathrm{<figure-callout\; id="6"\; label="h"\; filenames="S2008101377067E00071.png"\; state="\{\{state\}\}">h</figure-callout>}}^6+A_8{h}^8+A_{10}{h}^{10}---\left(7\right)$

wherein c is curvature, h is lens height, K is cone coefficient (Conic Constant), A₄、A₆、A₈、A₁₀Aspheric coefficients of four, six, eight and ten orders, respectively (N)^th Order Aspherical Coefficient)。

Fig. 3 is a schematic diagram of the optical path of the LED optical lens of the present invention in an LED assembly. In fig. 3, the maximum angle of the light emitted from the LED chip 11 is 2 ω (symmetrical about the central axis Z), and the light is collected and refracted by the optical lens 13 to form a beam

The angle (symmetrical by the central axis Z) forms the required light shape, and meets the requirement that beta/alpha is more than or equal to 85 percent, wherein alpha is the luminous flux of light emitted by the LED chip, beta is the luminous flux of light with the image side at a relative infinite distance (100 times fs), and the effects of refraction (refraction) and scattering (scattering) of air and the like are ignored. Furthermore, the optical lens 13 may be made of optical glass or of optical plastic.

Fig. 5 is a schematic optical path diagram of the plano-convex aspheric positive illumination angle optical lens and the led assembly formed by the same according to the present invention. The maximum angle of the light emitted from the LED chip 11 is 2 ω (symmetrical about the central axis Z), and the light is collected and refracted by the optical lens 14 to form a light beamThe angle (symmetrical by the central axis Z) forms the required light shape and meets the requirement that the beta/alpha is more than or equal to 85 percent, wherein the alpha is the luminous flux of the light emitted by the LED chip,β is the luminous flux of light at the image side at a distance of infinity (100 times fs), and the effects of refraction and scattering of air are ignored. Furthermore, the optical lens 14 may be made of optical glass or of optical plastic.

Based on the structure, the aspheric surface positive illumination angle optical lens and the light emitting diode component formed by the aspheric surface positive illumination angle optical lens can form a positive illumination angle circular light type which is larger than 72 degrees and smaller than 108 degrees, so that the LED component 10 can emit a preset light type, meets the requirement that the luminous flux ratio value is larger than 85 percent (beta/alpha is larger than or equal to 85 percent), and can be used singly or in an array formed by different light types.

For the purpose of illustrating practical application examples of the present invention, the LED chip 11 is a 1.0 × 1.0mm chip, and the diameter of the optical lens 13 (or the optical lens 14) is 5mm, so as to compare the application situations of the embodiments; however, the size of the LED chip 11 and the diameter of the optical lens 13 (or the optical lens 14) are not limited to the above-mentioned sizes.

Hereinafter, the light emitting diode module configured by the optical lens having the concave surface and the convex surface is used in the first to fourth embodiments, and the light emitting diode module configured by the optical lens of the plano-convex type is used in the fifth to eighth embodiments.

< first embodiment >

Fig. 2 and 6 are a schematic diagram of an LED assembly using an LED optical lens according to the present invention and a polar coordinate diagram of a light intensity distribution and an illumination angle according to the first embodiment.

The LED chips 11, the sealant 12, and the light source side optical surface R of the optical lens 13 are arranged along the central axis Z from the light source side to the image side in the following Table 1₁And an image side optical surface R₂Radius of curvature R (unit: mm), distance d (unit: mm), maximum angle 2 omega of light emitted from LED chip 11, and maximum angle of light pattern emitted from optical lens 13

(degree deg.) and respective refractive index (N)_d) Each thickness, each Abbe's number v_d。

TABLE 1

Aspherical surface

In table 1, the optical surfaces (Surf) are denoted by aspheric optical surfaces. The following table 2 is the coefficients of the aspherical surface formula (7) of each optical surface:

TABLE 2

In the present embodiment, the encapsulant 12 has a refractive index N_d1Is 1.527 and Abbe number v_d134 of transparent optical silica gel packing; the optical lens 13 has a refractive index N_d2Is 1.583 and Abbe number v_d261.7 of glass material. The refractive angle of light is formed by matching the refractive index and Abbe number of the sealing compound 12 and the optical lens 13. The LED chip 11 emits blue light of α ═ 12.15 lumens, the effective maximum angle is 130 °, and the effective focal length fs of the optical lens 13 is 4.20 mm; after being collected by the optical lens 13, β at infinity (100 fs times) at a normal illumination angle of 92 ° (ignoring the effects of refraction and scattering of air, etc.) — 11.092 lumens; the values of the formulae (1), (2), (3), (5), (6) and β/α are:

$\left|\frac{R_1-R_2}{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="S2008101377067E00101.png"\; state="\{\{state\}\}">R</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}\right|=0.9337$

<math><mrow> <mfrac> <msup> <msub> <mi>R</mi> <mn>1</mn> </msub> <mn>2</mn> </msup> <mrow> <mn>3</mn> <mo>&CenterDot;</mo> <msub> <mi>d</mi> <mn>2</mn> </msub> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> </mrow> </mfrac> <mo>=</mo> <mn>169.0802</mn> </mrow></math>

$(N_{d2}-1)\frac{d_2}{f_s}=0.3192$

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>=</mo> <mn>1.750</mn> </mrow></math>

β/α＝91.29％

the conditions of the formulae (1), (2), (3) and (5) can be satisfied. Fig. 3 is a schematic diagram illustrating a light path of light emitted from the LED chip 11 passing through the encapsulant 12 and the optical lens 13, and fig. 6 is a polar coordinate diagram of a light intensity distribution and an illumination angle of the LED assembly according to the first embodiment. As shown in tables 1 and 2 and fig. 6, it can be confirmed that the aspheric positive illumination angle optical lens of the present invention and the light emitting diode assembly formed by the same have a simple surface shape, are easy to manufacture, have a predetermined light pattern, have uniform light intensity at each angle, and thus can improve the applicability of the present invention.

< second embodiment >

Fig. 2 and 7 are schematic diagrams of the application of the LED optical lens of the present invention in an LED assembly and polar coordinate diagrams of light intensity distribution and illumination angle of a second embodiment, respectively.

In the following table 3, the radius of curvature R and the pitch d of each optical surface from the light source side to the image side along the central axis Z, the maximum angle 2 ω of the light emitted from the LED chip 11, and the maximum angle of the light pattern emitted from the optical lens 13 are listed respectively

Each refractive index (N)_d) Abbe number v_d. Table 4 shows the coefficients of the aspherical surface formula (7) of each optical surface.

TABLE 3

Aspherical surface

TABLE 4

In the present embodiment, the encapsulant 12 utilizes the refractive index N_d1Is 1.527 and Abbe number v_d134 of transparent optical silica gel packing; optical lens 13 utilizes refractive index N_d2Is 1.583 and Abbe number v_d261.7 of glass material. The LED chip 11 emits blue light of α ═ 12.15 lumens, the effective maximum angle is 130 °, and the effective focal length fs of the optical lens 13 is 5.66 mm; after being collected by the optical lens 13, β at infinity (in terms of 100 fs times) at a normal illumination angle of 92 ° is 11.57 lumens (ignoring the effects of refraction and scattering of air); the values of the formulae (1), (2), (3), (5), (6) and β/α are:

$\left|\frac{R_1-R_2}{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="S2008101377067E00101.png"\; state="\{\{state\}\}">R</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}\right|=0.7410$

<math><mrow> <mfrac> <msup> <msub> <mi>R</mi> <mn>1</mn> </msub> <mn>2</mn> </msup> <mrow> <mn>3</mn> <mo>&CenterDot;</mo> <msub> <mi>d</mi> <mn>2</mn> </msub> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> </mrow> </mfrac> <mo>=</mo> <mn>9.0579</mn> </mrow></math>

$(N_{d2}-1)\frac{d_2}{f_s}=0.2676$

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>=</mo> <mn>1.9031</mn> </mrow></math>

β/α＝95.22％

the conditions of (1), (2), (3) and (5) can be satisfied. Fig. 7 is a polar diagram of light intensity distribution versus illumination angle for the LED assembly of the second embodiment. As shown in tables 3 and 4 and fig. 7, it can be confirmed that the aspheric positive illumination angle optical lens of the present invention and the light emitting diode assembly formed by the same have a simple surface shape, are easy to manufacture, have a predetermined light pattern, have uniform light intensity at each angle, and thus can improve the applicability of the present invention.

< third embodiment >

Fig. 2 and 8 are schematic diagrams of the application of the LED optical lens of the present invention in an LED assembly and a polar coordinate diagram of the light intensity distribution and the illumination angle of the third embodiment, respectively.

In the following table 5, the curvature radius R and the pitch d of each optical surface from the light source side to the image side along the central axis Z, the maximum angle 2 ω of the light emitted from the LED chip 11, and the maximum angle of the light pattern emitted from the optical lens 13 are listed respectivelyEach refractive index (N)_d) Each thickness and each Abbe number v_d. Table 6 shows the coefficients of the aspherical surface formula (7) of each optical surface.

TABLE 5

Aspherical surface

TABLE 6

In this embodiment, the encapsulant 12 utilizes the refractive index N_d1Is 1.527 and Abbe number v_d134 of transparent optical silica gel packing; optical lens 13 utilizes refractive index N_d2Is 1.583 and Abbe number v_d261.7 of glass material. The LED chip 11 emits blue light of α ═ 12.15 lumens, the effective maximum angle is 110 °, and the effective focal length fs of the optical lens 13 is 4.20 mm; after being collected by the optical lens 13, β at infinity (100 fs times) at a positive illumination angle of 91 ° (ignoring the effects of refraction and scattering of air, etc.) — 11.277 lumens; the values of the formulae (1), (2), (3), (5), (6) and β/α are:

$\left|\frac{R_1-R_2}{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="S2008101377067E00101.png"\; state="\{\{state\}\}">R</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}\right|=0.9337$

<math><mrow> <mfrac> <msup> <msub> <mi>R</mi> <mn>1</mn> </msub> <mn>2</mn> </msup> <mrow> <mn>3</mn> <mo>&CenterDot;</mo> <msub> <mi>d</mi> <mn>2</mn> </msub> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> </mrow> </mfrac> <mo>=</mo> <mn>169.0802</mn> </mrow></math>

$(N_{d2}-1)\frac{d_2}{f_s}=0.3191$

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>=</mo> <mn>1.7501</mn> </mrow></math>

β/α＝91.82％

the conditions of (1), (2), (3) and (5) can be satisfied. Fig. 8 is a polar diagram of light intensity distribution versus illumination angle for an LED assembly according to a third embodiment of the present invention. As shown in tables 5 and 6 and fig. 8, the aspherical positive illumination angle optical lens of the present invention has a simple surface shape, is easy to manufacture, has a predetermined light pattern, has uniform light intensity at each angle, and thus can improve the applicability of the present invention.

< fourth embodiment >

Fig. 2 and 9 are schematic diagrams of the application of the LED optical lens of the present invention in an LED assembly and a polar coordinate diagram of the light intensity distribution and the illumination angle of the fourth embodiment, respectively.

In the following table 7, the radius of curvature R of each optical surface from the light source side to the image side along the central axis Z, the pitch d, and the light emitted from the LED chip 11 are listedMaximum angle 2 ω, maximum angle of light pattern emitted from optical lens 13

Each refractive index (N)_d) Each thickness and each Abbe number v_d. Table 8 shows the coefficients of the aspherical surface formula (7) of each optical surface.

TABLE 7

Aspherical surface

TABLE 8

	K	A4	A6	A8	A10
						*R2	6.0000E-01	7.0000E-03	-2.8000E-03	1.3700E-03	-4.7870E-06

In the present embodiment, the encapsulant 12 utilizes the refractive index N_d1Is 1.527 and Abbe number v_d134 of transparent optical silica gel packing; optical lens 13 utilizes refractive index N_d2Is 1.530 and has Abbe number v_d257 of a plastics material. The LED chip 11 emits blue light of α ═ 12.15 lumens, the effective maximum angle is 120 °, and the effective focal length fs of the optical lens 13 is 4.30 mm; after being collected by the optical lens 13, β at infinity (in 100 fs times) at a normal illumination angle of 92 ° (ignoring the effects of refraction and scattering of air, etc.) — 11.741 lumens; the values of the formulae (1), (2), (3), (5), (6) and β/α are:

$\left|\frac{R_1-R_2}{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="S2008101377067E00101.png"\; state="\{\{state\}\}">R</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}\right|=0.8801$

<math><mrow> <mfrac> <msup> <msub> <mi>R</mi> <mn>1</mn> </msub> <mn>2</mn> </msup> <mrow> <mn>3</mn> <mo>&CenterDot;</mo> <msub> <mi>d</mi> <mn>2</mn> </msub> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> </mrow> </mfrac> <mo>=</mo> <mn>59.3053</mn> </mrow></math>

$(N_{d2}-1)\frac{d_2}{f_s}=0.2278$

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>=</mo> <mn>1.7931</mn> </mrow></math>

β/α＝96.63％

the conditions of (1), (2), (3) and (5) can be satisfied. Fig. 9 is a polar coordinate diagram of light intensity distribution versus illumination angle for the LED assembly of the fourth embodiment. As shown in tables 7 and 8 and fig. 9, it can be confirmed that the aspheric positive illumination angle optical lens of the present invention and the light emitting diode assembly formed by the same have a simple surface shape, are easy to manufacture, have a predetermined light pattern, have uniform light intensity at each angle, and thus can improve the applicability of the present invention.

< fifth embodiment >

Fig. 4 and 10 are schematic diagrams of an optical path of the plano-convex LED optical lens applied to an LED module according to the present invention and polar coordinate diagrams of a light intensity distribution and an illumination angle of the fifth embodiment, respectively.

The LED chips 11, the sealant 12, and the light source side optical surface R of the optical lens 14 are arranged along the central axis Z from the light source side to the image side in the following Table 9₁And an image side optical surface R₂Radius of curvature R (unit: mm), pitch d (unit: mm), maximum angle 2 omega (degree deg) of the light emitted from LED chip 11, and maximum angle of the light pattern of the light emitted from optical lens 14(degree deg.) and respective refractive index (N)_d) Each thickness and each Abbe number v_d. Table 10 shows the coefficients of aspheric expression (7) for each optical surface:

TABLE 9

Aspherical surface

In table 9, the optical surfaces (Surf) are denoted by aspheric optical surfaces.

Watch 10

In the present embodiment, the encapsulant 12 utilizes the refractive index N_d1Is 1527, Abbe number v_d134 of transparent optical silica gel packing; optical lens 14 utilizes refractive index N_d2Is 1.583 and Abbe number v_d261.7 of glass material. The refractive angle of light is formed by matching the refractive index and Abbe number of the sealing compound 12 and the optical lens 14. The LED chip 11 emits blue light of α ═ 12.15 lumens, the effective maximum angle is 120 °, and the effective focal length fs of the optical lens 14 is 5.091 mm; after being collected by the optical lens 14, β at infinity (in 100 fs times) at a positive illumination angle of 90 ° (ignoring the effects of refraction and scattering of air, etc.) — 11.668 lumens; the values of the formulae (3), (4), (5), (6) and β/α are:

$(N_{d2}-1)\frac{d_2}{f_s}=1.7112$

$\frac{({\mathrm{<figure-callout\; id="0"\; label="d"\; filenames="S2008101377067E00061.png,S2008101377067E00111.png"\; state="\{\{state\}\}">d</figure-callout>}}_0+{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="S2008101377067E00101.png"\; state="\{\{state\}\}">d</figure-callout>}}_1+d_2)}{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}=1.0852$

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>=</mo> <mn>1.7112</mn> </mrow></math>

β/α＝96.03％

the conditions of the formulae (3), (4) and (5) can be satisfied. Fig. 10 is a polar coordinate diagram of the light intensity distribution versus illumination angle of the LED assembly of the fifth embodiment. As shown in tables 9 and 10 and fig. 10, it can be confirmed that the aspheric positive illumination angle optical lens of the present invention and the light emitting diode assembly formed by the same have a simple surface shape, are easy to manufacture, have a predetermined light pattern, have uniform light intensity at each angle, and thus can improve the applicability of the present invention.

< sixth embodiment >

Fig. 4 and 11 are schematic diagrams of the plano-convex optical lens of the present invention applied to an LED assembly and polar coordinate diagrams of light intensity distribution and illumination angle of the sixth embodiment, respectively.

The following table 11 includes a light source side optical surface R of the LED chip 11, the sealant 12, and the optical lens 14 from the light source side to the image side along the central axis Z₁And an image side optical surface R₂Radius of curvature R, pitch d, maximum angle 2 ω of light emitted from LED chip 11, and maximum angle of light pattern of light emitted from optical lens 14

Each refractive index (N)_d) Abbe number v_d. TABLE 12 non-of each optical surfaceCoefficients of spherical equation (7):

TABLE 11

Aspherical surface

TABLE 12

In this embodiment, the encapsulant 12 utilizes the refractive index N_d1Is 1.527 and Abbe number v_d134 of transparent optical silica gel packing; optical lens 14 utilizes refractive index N_d2Is 1.583 and Abbe number v_d261.7 of glass material. The refractive angle of light is formed by matching the refractive index and Abbe number of the sealing compound 12 and the optical lens 14. The LED chip 11 emits white light with α being 78.5 lumens, the effective maximum angle is 120 °, and the effective focal length fs of the optical lens 14 is 5.091 mm; after being collected by the optical lens 14, β at infinity (in 100 fs times) at a positive illumination angle of 90 ° (ignoring the effects of refraction and scattering of air, etc.) — 74.5 lumens; the values of the formulae (3), (4), (5), (6) and β/α are:

$(N_{d2}-1)\frac{d_2}{f_s}=0.3205$

$\frac{({\mathrm{<figure-callout\; id="0"\; label="d"\; filenames="S2008101377067E00061.png,S2008101377067E00111.png"\; state="\{\{state\}\}">d</figure-callout>}}_0+{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="S2008101377067E00101.png"\; state="\{\{state\}\}">d</figure-callout>}}_1+d_2)}{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}=1.0857$

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>=</mo> <mn>1.7111</mn> </mrow></math>

β/α＝94.92％

the conditions of the formulae (3), (4) and (5) can be satisfied. Fig. 11 is a polar coordinate diagram of light intensity distribution versus illumination angle for the LED assembly of the sixth embodiment. As shown in tables 11 and 12 and fig. 11, it can be confirmed that the aspheric positive illumination angle optical lens of the present invention and the light emitting diode assembly formed by the same have a simple surface shape, are easy to manufacture, have a predetermined light pattern, have uniform light intensity at each angle, and thus can improve the applicability of the present invention.

< seventh embodiment >

Fig. 4 and 12 are schematic diagrams of the plano-convex LED optical lens of the present invention applied to an LED assembly and polar coordinate diagrams of light intensity distribution and illumination angle of the seventh embodiment, respectively.

The LED chips 11, the sealant 12, and the light source side optical surface R of the optical lens 14 are arranged from the light source side to the image side along the central axis Z in the following table 13₁And an image side optical surface R₂Radius of curvature R, pitch d, maximum angle 2 ω of light emitted from LED chip 11, and maximum angle of light pattern of light emitted from optical lens 14

Each refractive index (N)_d) Each thickness and each Abbe number v_d. Table 14 shows the coefficients of aspheric expression (7) for each optical surface:

watch 13

Aspherical surface

TABLE 14

In the present embodiment, the encapsulant 12 utilizes the refractive index N_d1Is 1.527 and Abbe number v_d134 of transparent optical silica gel packing; optical lens 14 utilizes refractive index N_d2Is 1.530 and has Abbe number v_d257 of a plastics material. The refractive angle of light is formed by matching the refractive index and Abbe number of the sealing compound 12 and the optical lens 14. The LED chip 11 emits blue light of α ═ 12.15 lumens, the effective maximum angle is 120 °, and the effective focal length fs of the optical lens 14 is 5.091 mm; after being collected via the optical lens 14, at infinity (at 100 times) at a normal illumination angle of 90 DEGfs) of 11.74 lumens (ignoring refraction and scattering effects of air); the values of the formulae (3), (4), (5), (6) and β/α are:

$(N_{d2}-1)\frac{d_2}{f_s}=0.2707$

$\frac{({\mathrm{<figure-callout\; id="0"\; label="d"\; filenames="S2008101377067E00061.png,S2008101377067E00111.png"\; state="\{\{state\}\}">d</figure-callout>}}_0+{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="S2008101377067E00101.png"\; state="\{\{state\}\}">d</figure-callout>}}_1+d_2)}{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}=1.0521$

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>=</mo> <mn>1.7111</mn> </mrow></math>

β/α＝96.90％

the conditions of the formulae (3), (4) and (5) can be satisfied. Fig. 12 is a polar coordinate diagram of light intensity distribution versus illumination angle for the LED assembly of the seventh embodiment. As shown in tables 13 and 14 and fig. 12, it can be confirmed that the aspheric positive illumination angle optical lens of the present invention and the light emitting diode assembly formed by the same have a simple surface shape, are easy to manufacture, have a predetermined light pattern, have uniform light intensity at each angle, and thus can improve the applicability of the present invention.

< eighth embodiment >

Fig. 4 and 13 are schematic diagrams of the plano-convex LED optical lens of the present invention applied to an LED assembly and polar coordinate diagrams of light intensity distribution and illumination angle of an eighth embodiment, respectively.

The LED chips 11, the sealant 12, and the light source side optical surface R of the optical lens 14 are arranged from the light source side to the image side along the central axis Z in the following table 15₁And an image side optical surface R₂Radius of curvature R, pitch d, maximum angle 2 ω of light emitted from LED chip 11, and maximum angle of light pattern of light emitted from optical lens 14

Each refractive index (N)_d) Abbe number v_d. Table 16 shows the coefficients of aspheric expression (7) for each optical surface:

watch 15

Aspherical surface

TABLE 16

In this embodiment, the encapsulant 12 utilizes the refractive index N_d1Is 1.527 and Abbe number v_d134 of transparent optical silica gel; optical lens 14 utilizes refractive index N_d2Is 1.583 and Abbe number v_d261.7 of glass material. The refractive angle of light is formed by matching the refractive index and Abbe number of the sealing compound 12 and the optical lens 14. The LED chip 11 emits blue light of α ═ 12.15 lumens, the effective maximum angle is 130 °, and the effective focal length fs of the optical lens 14 is 5.091 mm; after being collected by the optical lens 14, β at infinity (in 100 fs times) at a normal illumination angle of 92 ° is 11.51 lumens (ignoring the effects of refraction and scattering of air); the values of the formulae (3), (4), (5), (6) and β/α are:

$(N_{d2}-1)\frac{d_2}{f_s}=0.2976$

$\frac{({\mathrm{<figure-callout\; id="0"\; label="d"\; filenames="S2008101377067E00061.png,S2008101377067E00111.png"\; state="\{\{state\}\}">d</figure-callout>}}_0+{\mathrm{<figure-callout\; id="1"\; label="d"\; filenames="S2008101377067E00101.png"\; state="\{\{state\}\}">d</figure-callout>}}_1+d_2)}{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="S2008101377067E00131.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}=1.0521$

<math><mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> <mo>=</mo> <mn>1.7112</mn> </mrow></math>

β/α＝94.70％

the conditions of the formulae (3), (4) and (5) can be satisfied. Fig. 13 is a polar coordinate diagram of light intensity distribution versus illumination angle for an LED assembly of an eighth embodiment. As shown in tables 15 and 16 and fig. 13, it can be confirmed that the aspheric positive illumination angle optical lens of the present invention and the light emitting diode assembly formed by the same have a simple surface shape, are easy to manufacture, have a predetermined light pattern, have uniform light intensity at each angle, and thus can improve the applicability of the present invention.

In summary, the aspheric positive illumination angle optical lens and the led assembly formed by the aspheric positive illumination angle optical lens of the present invention have the advantages of simple surface shape, and low deformation, and can be mass-produced by plastic injection molding or glass molding, thereby reducing the production cost. The optical lens can also use a plano-convex aspheric optical lens to simplify the manufacturing process.

The aspheric positive illumination angle optical lens and the light emitting diode assembly formed by the aspheric positive illumination angle optical lens have another effect that the light source projected from the LED chip can have a preset light type, so that the aspheric positive illumination angle optical lens can be suitable for illumination or specific illumination conditions such as flash lamps of mobile phones and cameras.

The aspheric positive illumination angle optical lens and the light emitting diode component formed by the aspheric positive illumination angle optical lens have another effect that a light source projected from the LED chip can maintain uniform illumination intensity at all angles, so that the phenomenon that partial areas are too bright or too dark can not occur on an imaging surface, and the illumination quality can be improved.

The foregoing is illustrative of the present invention and is not to be construed as limiting thereof. It will be understood by those skilled in the art that many variations, modifications and even equivalent variations may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (6)

1. An aspheric positive illumination angle optical lens applied to a light emitting diode assembly, wherein a light emitting diode chip, a sealant and an optical lens are arranged along a central axis from a light source side to an image side, and the aspheric positive illumination angle optical lens is characterized in that:

the image side optical surface of the optical lens is a convex surface, the light source side optical surface of the optical lens is a plane or a concave surface, at least one optical surface of the optical lens is an aspheric surface, and the aspheric surface satisfies an aspheric surface equation:

$Z=\frac{{\mathrm{ch}}^2}{1+\sqrt{(1-(1+K)c^2{h}^2)}}+A_4{h}^4+A_6{h}^6+A_8{h}^8+A_{10}{h}^{10},$

wherein c is curvature, h is lens height, K is conic coefficient, A₄、A₆、A₈、A₁₀Aspheric coefficients of fourth, sixth, eighth and tenth orders, respectively; and the optical lens satisfies the following conditions:

<math> <mrow> <mn>0.2</mn> <mo>&le;</mo> <mrow> <mo>(</mo> <msub> <mi>N</mi> <mrow> <mi>d</mi> <mn>2</mn> </mrow> </msub> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mfrac> <msub> <mi>d</mi> <mn>2</mn> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>&le;</mo> <mn>0.4</mn> </mrow> </math>

<math> <mrow> <mn>0.5</mn> <mo>&le;</mo> <mfrac> <mrow> <mo>(</mo> <msub> <mi>d</mi> <mn>0</mn> </msub> <mo>+</mo> <msub> <mi>d</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>d</mi> <mn>2</mn> </msub> <mo>)</mo> </mrow> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>&lt;</mo> <mn>1.2</mn> </mrow> </math>

wherein,

<math> <mrow> <msub> <mi>f</mi> <mi>g</mi> </msub> <mo>=</mo> <mo>|</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>R</mi> <mn>2</mn> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> <mo>|</mo> </mrow> </math>

<math> <mrow> <mn>0.7</mn> <mo>&le;</mo> <mo>|</mo> <mfrac> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <mo>-</mo> <msub> <mi>R</mi> <mn>2</mn> </msub> </mrow> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>R</mi> <mn>2</mn> </msub> </mrow> </mfrac> <mo>|</mo> <mo>&le;</mo> <mn>1.0</mn> </mrow> </math>

wherein R is₁Is the radius of curvature, R, of the light source side optical surface of the optical lens₂Is the radius of curvature of the image-side optical surface of the optical lens, d₀Is the thickness of the LED chip along the central axis, d₁Is the distance along the central axis from the surface of the LED chip to the optical surface of the optical lens on the light source side, d₂Is the thickness of the optical lens along the central axis, N_d2Is the refractive index of the optical lens, fg is the length of the relative focal length of the optical lens, fs is the length of the effective focal length of the optical lens, ω is half of the maximum angle of the light emitted by the light emitting diode chip symmetrical about the central axis,is half of the maximum angle of the light rays emitted by the optical lens and symmetrical with the central axis;

the light emitting diode component is provided with a positive illumination angle circular light type which is more than 72 degrees and less than 108 degrees through the aspheric positive illumination angle optical lens,

the optical lens is made of an optical material.

2. The aspheric positive illumination angle optical lens of claim 1, wherein the light source side optical surface of the optical lens is a concave surface, the concave surface and the convex surface are both aspheric and satisfy the aspheric equation, and the optical lens further satisfies the following condition:

<math> <mrow> <mn>8</mn> <mo>&le;</mo> <mfrac> <msup> <msub> <mi>R</mi> <mn>1</mn> </msub> <mn>2</mn> </msup> <mrow> <mn>3</mn> <mo>&CenterDot;</mo> <msub> <mi>d</mi> <mn>2</mn> </msub> <mo>&CenterDot;</mo> <msub> <mi>f</mi> <mi>s</mi> </msub> </mrow> </mfrac> <mo>&le;</mo> <mn>180</mn> </mrow> </math>

wherein R is₁Is a radius of curvature of a light source side optical surface of the optical lens, fs is a length of an effective focal length of the optical lens, d₂Is the thickness of the optical lens along the central axis.

3. The aspheric positive-angle optical lens of claim 1, wherein the optical lens is made of a plastic material.

4. The aspheric positive-angle optical lens of claim 1, wherein the optical lens is made of a glass optical material.

5. A light emitting diode assembly comprising a light emitting diode chip and the aspheric positive angle optical lens of any one of claims 1-4, wherein the light emitting diode assembly has a positive angle circular light pattern of greater than 72 ° and less than 108 °.

6. The led assembly of claim 5, wherein a ratio of luminous flux of the light emitted by the led chip to luminous flux at the image-side relative infinity satisfies the following condition:

β/α≥85％

wherein α is the luminous flux of the light emitted by the led chip, and β is the luminous flux obtained by neglecting the refraction and scattering effect of air at a relatively infinite distance from the image side of the led component.

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