CN101761866B - Optical lens and light-emitted diode lighting device thereof - Google Patents

Abstract

The invention discloses an optical lens and a light-emitted diode lighting device thereof. The optical lens is a transparent lens body and comprises a light source side optical surface, a lighting side optical surface and a peripheral part, wherein the light source side optical surface is designed by using a free-form surface formula, and is used for facing to the light-emitted diode light source and enabling light beams emitted by the light-emitted diode light source to enter the optical lens via the light source side optical surface; the lighting side optical surface is designed by using the free-form surface formula, faces to the irradiation area, and enables the light beams emitted from an LED light source to enter to the irradiation area forwards via the lighting side optical surface after the light beams enter the optical lens via the light source side optical surface; and the peripheral part is the peripheral part of a non-optical surface on the lens body. A plurality of optical lenses are axially arranged on an outer cover to form an array in which a lens array and the LED light source are matched for usage, thereby forming an LED lighting device to be applicable to lighting for street lamps, car lamps or photoflash lamps and the like.

Description

Optical lens and light emitting diode illuminating apparatus thereof

Technical field

The present invention relates to a kind of optical lens and lighting device thereof; Especially refer to a kind of optical lens and light emitting diode illuminating apparatus thereof; It utilizes the light source-side optical face and the illumination side optical surface of the said optical lens of free form surface formula (surface definition of free form) design, can produce uniform illumination and can satisfy requirement such as special lighting light shape so that led light source sees through said optical lens.

Background technology

Utilize light emitting diode (light-emitting diode; Abbreviation LED) light source as lighting device has been prior art; And quite extensive auxiliary lighting apparatus such as camera flashlamp, scanning illuminating light source device etc. on the application like flashlight, desk lamp, car light such as headlight and tail-light group, street lamp or other electronic products; Its mostly be to use a plurality of light emitting diodes (LED) to form an array as light source; And above-mentioned led array is meant a plurality of LED is arranged in a certain apperance (pattern) according to the needs of lighting device, like linear array, arranged, circular concentric arrangement etc. but do not limit; And a light emitting diode (LED) comprises basically: a pedestal in order to carry LED crystal grain and make LED crystal grain external power supply, one or several LED crystal grain in order to luminous after conduction, and one or more layers cover type lenticular body (cover lens) by translucent resin or glass molding material; Generally be commonly referred to as first lens (firstlens) of LED; Be packaged into a LED assembly (LEDassembly in order to the outside that is coated on said base and LED crystal grain; Be called for short LED in the present invention); During use, the light that the LED wafer sends throws outwards through first lens (first lens) again.

In the application of LED; The service condition that the lighting device of different purposes is had nothing in common with each other is the example explanation with the street lamp, street lamp generally requires on irradiation area (being the road surface), can reach illumination even, enough and the scope of irradiation area preferably to contain a length (be long axis direction; Parallel trend of road), wide (is short-axis direction; Vertical trend of road) than about 3: 1 rectangular area, because of 15～30 meters approximately at interval in street lamp, about 6～20 meters of street lamp height; And for making the formed led array light source of led light source or several LED can meet the demand; Each LED is except having had the first basic lens (first lens) on encapsulating structure; At the light projecting direction of LED is that the place ahead of LED generally disposes one second lens (second lens) all again; With the service efficiency of lifting led light source, as increase effective illumination (illumination unit: lux=lumen 1m/m ²) and the adjustment led light source effective irradiation area and illuminance uniformity.Yet, traditional street lamp such as high-pressure mercury lamp, though the luminous efficiency of bulb itself is higher, effective illumination of its light fixture is on the low side, mainly causes waste because the light shape (irradiation area) that is produced also can't effectively cover required field of illumination.

Therefore; In the application technology of led light source like street lamp; Develop a kind of intensity distributions (rectangular light distribution patterns) that can produce the light shape of nearly rectangle, and the uniform again optical lens (second lens) of effective illumination height, its desirability is arranged really.

Summary of the invention

Main purpose of the present invention is to provide a kind of optical lens and light emitting diode illuminating apparatus thereof; It is light source-side optical face and the illumination side optical surface that utilizes the said optical lens of free form surface formula (surface definition of free form) design; Wherein, Utilize anamorphosis formula (Anamorphic surfaceformula) to make light source-side optical face design form an axial symmetry, and prolonging major axis and cuing open to being concave shape, and utilize double-curved surface formula (Toric surface formula); Make the design of illumination side optical surface form an axial symmetry; And prolonging major axis and cuing open, making said optical lens upwards have different curvature, so that when said optical lens is arranged in pairs or groups the use of at least one led light source in disalignment to being the M shape of middle indent both sides evagination; Not only can improve the effective illumination of led light source; And can reach the result of use that in irradiation area, produces the intensity distributions (rectangular distribution patterns) of even and near rectangular light shape, and use to be applicable to illuminations such as street lamp, car light or photoflash, required like street lighting; The length of long axis direction (parallel trend of road) is with respect to the width of short-axis direction (vertical trend of road), and ratio is 3: 1 a rectangular light shape.

Still a further object of the present invention is to provide a kind of optical lens and lighting device thereof; It is to utilize several said optical lenses with a coaxial lens arra or other arrangement modes of on an outer cover, forming; Confession can arrange in pairs or groups a led light source array or other arrangement modes and constitute a LED lighting device; With the effective illumination of raising led light source, and can reach the result of use that in irradiation area, produces even and near rectangular light shape, use to be applicable to illuminations such as street lamp, car light or photoflash.

In order to achieve the above object; The present invention provides a kind of optical lens; Be to use in order to collocation LED light source, said optical lens is a transparent mirror lamellar body, and it comprises a light source-side optical face, an illumination side optical surface and an outer part; Said light source-side optical face; Be to utilize the free form surface formulae design to form, in order to face at least one LED source, the light beam that said at least one LED source is sent is incident in the said optical lens via said light source-side optical face; Said illumination side optical surface is to utilize the free form surface formulae design to form, and is towards irradiation area, when light beam that led light source sent via the light source-side optical face after being incident in the optical lens, outgoing to the irradiation area forward via said illumination side optical surface; Said outer part is non-optical a periphery on the eyeglass body of said optical lens; Wherein, All utilize the characteristic of free form surface formula matching design by said light source-side optical face and said illumination side optical surface; Make light beam that LED source sends produce one in the length of long axis direction and in the intensity distributions of the light shape of the nearly rectangle of width ratio of short-axis direction at irradiation area via said optical lens refraction back; Wherein, said long axis direction is the X axle, and described short-axis direction is the Y axle.

In order to achieve the above object; The present invention provides a kind of light emitting diode illuminating apparatus; Be to utilize above-mentioned optical lens and the LED lighting device that constitutes, it comprises at least one optical lens, at least one led light source and an outer cover, said optical lens; It is a transparent mirror lamellar body; It comprises a light source-side optical face, an illumination side optical surface and an outer part, and wherein said light source-side optical face and said illumination side optical surface are to utilize the free form surface formulae design to form, and are embedded in the hole slot set on outer cover with correspondence by said outer part; Said led light source is the light source-side optical face in the face of said optical lens; Said outer cover, the hole slot that which is provided with supply an optical lens to be embedded wherein; Wherein, The light beam that said led light source sent is incident in the optical lens and outgoing to the irradiation area forward via said illumination side optical surface via the light source-side optical face of said optical lens; And utilize the characteristic of free form surface formula matching design by said light source-side optical face and said illumination side optical surface; Make light beam that said led light source sends produce a length and width ratio is the intensity distributions of nearly rectangular light shape at irradiation area; Wherein, said long axis direction is the X axle, and described short-axis direction is the Y axle.

Beneficial effect of the present invention is: utilize the light source-side optical face and the illumination side optical surface of the said optical lens of free form surface formulae design, can produce uniform illumination and can satisfy requirement such as special lighting light shape so that led light source sees through said optical lens.

Description of drawings

Fig. 1 is a visual angle (the illumination side optical surface visual angle) schematic perspective view of optical lens one embodiment of the present invention;

Fig. 2 is another visual angle (light source-side optical face) schematic perspective view of Fig. 1;

Fig. 3 is front (X-Y axial plane) sketch map (comprising each relative dimensions, the mm of unit) of optical lens one embodiment of the present invention;

Fig. 4 is the side cross-sectional schematic (comprising each relative dimensions, the mm of unit) of Fig. 3 Vertical Centre Line 4-4 (X axle);

Fig. 5 is the side cross-sectional schematic (comprising each relative dimensions, the mm of unit) of Fig. 3 Vertical Centre Line 5-5 (Y axle);

Fig. 6 is that the optical lens of the present invention section that a led light source and an outer cover use of arranging in pairs or groups is looked sketch map (comprising each relative dimensions, the mm of unit);

Fig. 7 is optical lens of the present invention forms a LED optical lens array on outer cover a user mode sketch map;

To be led light source of the present invention inject behind the optical lens explanation sketch map that can produce the projection light of the different angles of divergence in X axle and Y direction with the same illumination angle to Fig. 8;

Fig. 9 is the explanation sketch map that the projection light of the different angles of divergence among Fig. 8 can produce rectangular light shape.

Description of reference numerals: 1-optical lens; 10-light source-side optical face; The 11-central shaft; 20-illumination side optical surface; The 21-indent; The 22-evagination; The 23-central shaft; The 30-outer part; The 2-LED light source; The 201-light beam; The 202-emergent light; The 3-LED lighting device; The 4-outer cover; The 41-hole slot.

The specific embodiment

For making the present invention clear and definite more full and accurate, enumerate preferred embodiment at present and cooperate following diagram, structure of the present invention and technical characterictic thereof are detailed like the back:

With reference to figure 1-5, it is respectively two different visual angles (visual angle of illumination side optical surface and light source-side optical face) schematic perspective view and three not ipsilateral (on look, face and side-looking) and the relative dimensions sketch map of optical lens one embodiment of the present invention.Optical lens 1 of the present invention; Be to use as shown in Figure 6 in order at least one light emitting diode (LED) light source 2 of arranging in pairs or groups; It is a transparent mirror lamellar body, comprises a light source-side optical face 10 and an illumination side optical surface 20 at least, wherein; Said light source-side optical face 10 is as shown in Figure 6 in the face of at least one light emitting diode (LED) light source 2, and the light beam that said led light source 2 is sent can be incident in the optical lens 1 via light source-side optical face 10; Said illumination side optical surface 20 is towards irradiation thing or irradiation area, when light beam that led light source 2 sent via light source-side optical face 10 after being incident in the optical lens 1, can be via said illumination side optical surface 20 forward outgoing to shining thing or irradiation area.

The present invention is characterized in: the light source-side optical face 10 of said optical lens 1 and illumination side optical surface 20 all are to utilize free form surface formula (the surface definition of free form) formation that designs; Said free form surface formula is the known technology in the optical field; Comprise multiple different formulas at present and supply and can when design lens optical face, quote, like formula (1) anamorphosis formula (Anamorphicformula) and formula (2) the double-curved surface formula (Toric formula) shown in following:

Formula (1) Anamorphic formula (anamorphosis formula):

$Z=\frac{\left(\mathrm{Cx}\right){\mathrm{<figure-callout\; id="2"\; label="X"\; filenames="H2008101765791E00032.png"\; state="\{\{state\}\}">X</figure-callout>}}^2+\left(\mathrm{Cy}\right){\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="H2008101765791E00032.png"\; state="\{\{state\}\}">Y</figure-callout>}}^2}{1+\sqrt{1-(1+\mathrm{Kx}){\left(\mathrm{Cx}\right)}^2{X}^2-(1+\mathrm{Ky}){\left(\mathrm{Cy}\right)}^2{\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="H2008101765791E00032.png"\; state="\{\{state\}\}">Y</figure-callout>}}^2}}+\underset{i=1}{\overset{20}{\mathrm{\&Sigma;}}}{A}_{2i}{\{(1-B_{2i}){\mathrm{<figure-callout\; id="2"\; label="X"\; filenames="H2008101765791E00032.png"\; state="\{\{state\}\}">X</figure-callout>}}^2+(1+B_{2i})Y^2\}}^i$

Formula (2) Toric formula (double-curved surface formula):

$\mathrm{Zx}=\frac{\left(\mathrm{Cx}\right){\mathrm{<figure-callout\; id="2"\; label="X"\; filenames="H2008101765791E00032.png"\; state="\{\{state\}\}">X</figure-callout>}}^2}{1+\sqrt{1-(1+\mathrm{Kx}){\left(\mathrm{Cx}\right)}^2{X}^2}}+\underset{i=1}{\overset{20}{\mathrm{\&Sigma;}}}{A}_i{X}^i,\mathrm{Cyx}=\frac{1}{(1/\mathrm{Cy})-\mathrm{Zx}}$

$Z=\mathrm{Zx}+\frac{\left(\mathrm{Cyx}\right){\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="H2008101765791E00032.png"\; state="\{\{state\}\}">Y</figure-callout>}}^2}{1+\sqrt{1-{\left(\mathrm{Cyx}\right)}^2{\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="H2008101765791E00032.png"\; state="\{\{state\}\}">Y</figure-callout>}}^2}}$

Wherein, when the optical surface of design eyeglass, the designer can need with the use of lens optical face to change each optical parametric in the formula, and carries out simulated test by computer software, so that the optical mirror slip that design is accomplished can be reached the desired result of use of said eyeglass; And the present invention utilizes free form surface formula (surfacedefinition of free form) to design the light source-side optical face 10 and the illumination side optical surface 20 of said optical lens 1; Can make formed light source-side optical face 10 and illumination side optical surface 20 be all continuous curve surface; Operations with the mould that helps making said optical lens 1; Can make the mould handling ease; And the surface precision that helps the optical surface of light source-side optical face 10 and illumination side optical surface 20, promptly forming surface type precision improves relatively and can reach optical-grade.

With the present embodiment optical lens 1 shown in Fig. 1-5, wherein said light source-side optical face 10 is to utilize anamorphosis formula (Anamorphic formula) design and form an axial symmetry, and is prolonging major axis and cuing open to being concave shape, and is as shown in Figure 2; Said illumination side optical surface 20 is to utilize double-curved surface formula (Toricformula) design and form an axial symmetry, and both sides evagination 22 and the M shape of middle indent 21, and light source-side optical face 10 and illumination side optical surface 20 corresponding matching; And like a pratical and feasible size of Fig. 3-5 illustrated embodiment optical lens 1; It is by the use needs of inventor (designer) to street lamp; As to satisfy the required X axle of street lamp (be long axis direction; Parallel trend of road) length (is short-axis direction with respect to the Y axle; Vertical trend of road) width ratio is 3: 1 rectangular light shape demand and uniformity requirement, and each optical parametric and carry out simulated test by computer software in the change formula, with design accomplish one can reach the optical mirror slip 1 of the desired result of use of said eyeglass (like 3: 1 rectangular light shapes) actual product; Belong to non-optical remainder on the body as for optical lens 1; As among Fig. 1,2 at the outer part 30 of light source-side optical face 10 and illumination side optical surface 20; Its shape and structure do not limit; Can need and change design according to the assembling of bright device, the present embodiment optical lens 1 shown in Fig. 1-5 be to be designed to a rectangular lens body, and its outer part 30 mainly is with the shape of hole slot 41 and structure and matching design according to set assembling on the lighting device 3 employed outer covers 4.

Optical lens 1 of the present invention again mainly is through the corresponding matching relation of light source-side optical face 10 with illumination side optical surface 20; Making optical lens 1 (is long axis direction at the X axle; Parallel trend of road) and the Y axle (be short-axis direction; Vertical trend of road) has different curvature on, and then can on X axle and Y axle, produce the refraction effect of the different angles of divergence, to form the different rectangular light shape of Aspect Ratio to the light beam 201 that led light source 2 is sent; With explanation shown in Figure 8; The light beam 201 that is sent when a led light source 2 is to be fixed into firing angle θ x, θ y incident and via said optical lens 1 again during outgoing to irradiation area (viewing area) A; Because optical lens 1 has different curvature on X axle and Y axle; Therefore can produce the emergent light 202 of the different angles of divergence in X axle and Y direction; Emergent light 202 as shown in Figure 8 at the angle of divergence θ x ' on the X axle greater than the angle of divergence θ y ' of emergent light 202 on the Y axle; Therefore in irradiation area A position, greater than emergent light 202 formed range of exposures Ly on the Y axle, just can produce the about Lx of an Aspect Ratio at irradiation area A place: (rectangular light distribution patterns) is as shown in Figure 9 for the intensity distributions of the light shape of the rectangle of Ly at formed range of exposures Lx on the X axle for emergent light 202; With the present embodiment optical lens shown in Fig. 1-5 1 is the example explanation; And put shown in 3 with reference to the illumination light of Fig. 6; Present embodiment optical lens 1 is to use and the optical lens of design to street lamp; Therefore can produce the required X shaft length of street lamp after light beam 201 process optical lenses 1 refraction that led light source 2 is sent (is long axis direction; Parallel trend of road) is about 3: 1 nearly rectangular light shape with respect to Y axial extent (be short-axis direction, vertical trend of road), with the demand and the uniformity requirement of the nearly rectangular light shape of satisfying the required special ratios of street lamp; Aspect Ratio relation as for said nearly rectangular light shape can need with the use of optical lens 1 to change each optical parametric in the formula, and makes simulated test by computer software, so that the optical mirror slip that design is accomplished can be reached the best result of use of said optical lens 1.A plurality of equal optical lens capable of using again to be with the coaxial lens arra that on an outer cover, forms, and the confession led light source array of can arranging in pairs or groups uses, and to constitute a LED lighting device, uses to be applicable to illuminations such as street lamp, car light or photoflash.

Light emitting diode of the present invention (LED) lighting device 3 is like Fig. 6, shown in 7; Comprise at least one led light source 2, at least one optical lens 1 and an outer cover (holder) 4; Wherein, The shape of said LED lighting device 3, size, assembling kenel, and led light source do not limit with corresponding relation (like the corresponding optical lens 1 of a led light source) between the optical lens 1; Can be according to the different needs of application matching design; As different designs being provided to different application such as the auxiliary lighting apparatus of street lamp, flashlight, desk lamp, car light such as headlight and tail-light group or other electronic products such as camera flashlamp, scanning illuminating light source device, and present embodiment as shown in Figure 7 be to be the example explanation with street lamp or ware, but non-in order to restriction the present invention.With reference to figure 6, shown in 7; Optical lens 1 of the present invention is to use in order at least one light emitting diode (LED) light source 2 of arranging in pairs or groups; The optical lens 1 of present embodiment as shown in Figure 6 is that corresponding collocation one led light source 2 uses; Wherein said optical lens 1 is to use the embodiment shown in Fig. 3-5, just needs and the optical lens of design to the street lamp use, and wherein said led light source 2 is arranged in the concave shaped curved surface of said light source-side optical face 10; The present invention further can utilize several said optical lenses 1 with coaxial again; Be optical lens 1 the X axle/the Y axle in the same way; Be illustrated in figure 7 as 1 and take advantage of 6 lens arra but do not limit and on the outer cover 4 of a large-size, form a lens arra; Confession can be corresponding collocation one by a plurality of led light source 2 formed led light source arrays to constitute a LED lighting device 3; With process loss, the effective illumination of raising led light source that reduces led light source, and can reach the result of use that in irradiation area, produces even and near rectangular light shape; Shown in Figure 7ly again take advantage of formed LED lighting device 3 embodiment of 6 lens arras to use and design to street lamp by 6; But the arrangement mode of lens arra does not limit; It can need to change design with different uses; As the array that can be different numbers takes advantage of 4,2 to take advantage of 1 or the arrangement mode of other non-arrays such as linear array, circular concentric arrangement, alternating expression arrangement etc. as 5, to be applicable to other lighting uses such as car light or photoflash etc.

Outer cover (holder) the 4th can sealing means be located at the illumination side peripheral (figure does not show) of led light source 2; Shape, assembling kenel and size etc. as for outer cover 4 do not limit; Can be according to the different needs of application matching design; Process the integrated formed structure body like Fig. 6, shown in 7 like said outer cover 4 plastic rubber ejaculate molding technologies capable of using, the fabricated structure body that many things of also can serving as reasons are formed (figure does not show); Said outer cover 4 is provided with at least one hole slot 41, establishes on the outer cover 4 as shown in Figure 6 a plurality of hole slots 41 to be set on a hole slot 41 or the outer cover as shown in Figure 74 and to form a hole slot array; And can be embedded an optical lens 1 in each hole slot 41 respectively forming as shown in Figure 76 the taking advantage of 6 lens arra but do not limit of a lens arra, and each hole slot 41 and optical lens 1 can be distinguished corresponding collocation one led light source 2 and use to form a light emitting diode (LED) lighting device 3.Again with the present embodiment shown in Fig. 1-7; The external form of said optical lens 1 and size (being outer part 30) are to cooperate set hole slot 41 designs on the outer cover 4; So that optical lens 1 can correspondence is embedded in hole slot 41 and is combined into one; And its combination does not limit, and is can be by viscose glue bonding fixing and be good can reach waterproof effect.

Again with reference to figure 6, shown in 7; During use; In the led light source array 2 of each led light sources send light beam all can be corresponding through an optical lens 1 in the optical lens array on the outer cover 4 and outwards projection again; Except that can reaching optical lens 1 desired smooth shape effect, and effective illumination of led light source be can improve, and the optical efficiency and the service efficiency of LED lighting device 3 promoted.Again because LED lighting device 3 of the present invention is at least one hole slot 41 to be set earlier supply respectively that correspondence is embedded an optical lens 1 on outer cover 4; Therefore outer cover 4 is to separate making with optical lens 1; And the shape of hole slot 41 is matching design basically according to the external form of the corresponding optical lens 1 that is embedded; Therefore, the design of the mould of optical lens 1 used in the present invention, making and procedure for producing can be simple and easy relatively, and the optical surface of optical lens 1 also can simple and easyly be reached design optimization; Help promoting the optical efficiency of optical lens 1, and simplify the assembling operation of LED lighting device 3 of the present invention relatively.

More than shown in be merely the preferred embodiments of the present invention, only be illustrative for the purpose of the present invention, and nonrestrictive.Understand the common knowledge personnel of this professional skill field tool, in spirit that claim of the present invention limited and scope, can carry out many changes, revise, even equivalence changes, but all will fall in protection scope of the present invention it.

Claims (7)

1. an optical lens is to use in order to the collocation LED source, and said optical lens is a transparent mirror lamellar body, and it comprises a light source-side optical face, an illumination side optical surface and an outer part, it is characterized in that:

Said light source-side optical face is to utilize the free form surface formulae design to form, and in order to face at least one LED source, the light beam that said at least one LED source is sent is incident in the said optical lens via said light source-side optical face;

Said illumination side optical surface; Be to utilize the free form surface formulae design to form; Be towards irradiation area, when light beam that said LED source sent via said light source-side optical face after being incident in the said optical lens, outgoing to the irradiation area forward via said illumination side optical surface;

Said outer part is non-optical a periphery on the eyeglass body of said optical lens;

Wherein, All utilize the characteristic of free form surface formula matching design by said light source-side optical face and said illumination side optical surface; Make light beam that LED source sends produce the length of a long axis direction and be the intensity distributions of the light shape of rectangle in the width ratio of short-axis direction at irradiation area via said optical lens refraction back, wherein, said long axis direction is the X axle; Described short-axis direction is the Y axle, wherein:

Said light source-side optical face is to utilize anamorphosis formulae design as follows in the free form surface formula:

And forming an axial symmetry, and prolonging major axis and cuing open to being the light source-side optical face of concave shape;

Said illumination side optical surface is to utilize double-curved surface formulae design as follows in the free form surface formula:

And forming an axial symmetry, and prolonging major axis and cuing open to the illumination side optical surface that is the M shape of middle indent both sides evagination.

2. optical lens according to claim 1; It is characterized in that; Said optical lens the ratio of the length of the rectangular light shape that irradiation area produced, width be through change free form surface formula in each optical parametric, and carry out simulated test by computer software and design.

3. optical lens according to claim 1 is characterized in that, said optical lens is 3: 1 in length, the width ratio of the rectangular light shape that irradiation area produced.

4. light emitting diode illuminating apparatus is to utilize said any optical lens of claim 1 to 3 and the light emitting diode illuminating apparatus that constitutes, and it comprises at least one said optical lens, at least one led light source and an outer cover, it is characterized in that:

Said optical lens; It is a transparent mirror lamellar body; It comprises a light source-side optical face, an illumination side optical surface and an outer part; Wherein said light source-side optical face and said illumination side optical surface are to utilize the free form surface formulae design to form, and are embedded in the hole slot set on said outer cover with correspondence by said outer part;

Said led light source is the light source-side optical face in the face of said optical lens;

Said outer cover, the hole slot that which is provided with supply an optical lens to be embedded wherein;

Wherein, The light beam that said led light source sent is incident in the said optical lens and outgoing to the irradiation area forward via said illumination side optical surface via the light source-side optical face of said optical lens; And utilize the characteristic of free form surface formula matching design by said light source-side optical face and said illumination side optical surface; Make light beam that said led light source sends produce a length and width ratio is the intensity distributions of rectangular light shape at irradiation area; Wherein, said long axis direction is the X axle, and described short-axis direction is the Y axle.

5. light emitting diode illuminating apparatus according to claim 4 is characterized in that, the outer part of said optical lens be cooperate on the outer cover hole slot so that said optical lens correspondence be embedded in said hole slot and be combined into one.

6. light emitting diode illuminating apparatus according to claim 4 is characterized in that, the hole slot that said outer cover is provided with is a plurality of, and said plurality of holes groove forms a hole slot array.

7. light emitting diode illuminating apparatus according to claim 6 is characterized in that, said hole slot array is one 6 to take advantage of 6 hole slot array.

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