CN208779386U

CN208779386U - The lens subassembly of changeable spot size

Info

Publication number: CN208779386U
Application number: CN201821338490.6U
Authority: CN
Inventors: 徐日民; 孙利强
Original assignee: Shanghai Caicheng New Material Technology Co Ltd
Current assignee: Zhejiang Caicheng Technology Co ltd
Priority date: 2018-08-20
Filing date: 2018-08-20
Publication date: 2019-04-23
Anticipated expiration: 2028-08-20

Abstract

The utility model relates to a kind of lens subassemblies of changeable spot size, including lens A and lens B, and the lens A is plane on one side, it is on one side convex surface, the lens B is concave surface, is on one side plane, the convex surface of lens A and the concave surface curved surface having the same of lens B.Compared with prior art, the utility model lens subassembly position adjustable range is small；100% light collection efficiency is realized below any size hot spot；Self-consistent light shape may be implemented below different hot spots.Simultaneously as this is that the optical lens design of sheet type is not only beautiful and generous, it is also significantly reduced material used in lens, cost is lower.

Description

The lens subassembly of changeable spot size

Technical field

The utility model relates to the hot spots such as LED to change system, more particularly, to a kind of lens group of changeable spot size Part.

Background technique

For the needs for meeting illumination application, usually can all use secondary optics to the optics of the LED all angles issued into Capable control, it is illuminated due to needing in some accent light fields to realize the application needs of Uniform Illumination or directional lighting Object have the dimensions size, in order to preferably protrude illuminated object, often require that lamps and lanterns outgoing light control Within certain angular range.The angle of lamps and lanterns emergent light on the market is usually fixed angle, such as narrow angle light distribution, middle angle Spend light distribution, wide angle light distribution.But in practical applications, since illuminated object is various, size difference is bigger, together When be limited by mounting condition, lamps and lanterns are also just the same at a distance from illuminated object.Use the light distribution of one or more of fixed angles Distribution is not well positioned to meet the needs of this diversification application.To solve this problem in the industry, a kind of use is released on the market The optical lens of simple lens, by adjusting simple lens and the distance between the light-emitting LED size to change hot spot, simple lens with The distance of LED is closer to becoming for hot spot is bigger；Conversely, simple lens is remoter at a distance from LED, hot spot will become smaller.This There are some drawbacks for the mode of kind adjusting spot size:

1. to obtain the variation of apparent hot spot, need to change that the distance between lens and LED range are bigger, and range is past Toward needing 20mm or more.This is unfavorable for the Miniaturization Design of lamps and lanterns.

2. since the size of lens is fixed.The luminous flux issued by LED that lens are collected between the two away from From more long distance, its collection efficiency becomes lower, and then system light efficiency is made to become low.Be unfavorable for it is energy saving, be LED be representative Green illumination fall short of the reality.

3. being reached using the relative position for changing single lens and LED and changing the method for lamps and lanterns hot spot there is also different The light shape difference that position obtains below is very big, so that lighting quality is unstable, in actual use, causes the photograph of single StoreFront Bright style disunity influences the effect that final illumination is presented.

Utility model content

The purpose of this utility model is exactly to provide a kind of changeable light to overcome the problems of the above-mentioned prior art The lens subassembly of spot size can be with effective solution three problems above-mentioned by accurate optical design.Not only position Adjustable range is small；100% light collection efficiency is realized below any size hot spot；Front and back one may be implemented below different hot spots The light shape of cause.Simultaneously as this is that the optical lens design of sheet type is not only beautiful and generous, also it is significantly reduced lens and is used Material, cost is lower.

The purpose of this utility model can be achieved through the following technical solutions: a kind of lens group of changeable spot size Part, which is characterized in that including lens A and lens B, the lens A is plane on one side, is on one side convex surface, and the lens B is Concave surface is on one side plane, the convex surface of lens A and the concave surface curved surface having the same of lens B.

The lens A is assemblied in the light-emitting surface of lamps and lanterns, and the plane of lens A and the light-emitting surface of lamps and lanterns fit, lens A's Convex surface and the concave surface of lens B fit.

The adjusting to spot size is realized by adjusting the spacing between lens A and lens B.

The angle changed when two lens are bonded completely is minimum, and hot spot is suitable with the hot spot of original lamps and lanterns；With two Distance becomes larger between lens, and lamps and lanterns hot spot is also with becoming larger；When the distance between two lens increase to set distance, hot spot is not Become larger again, no longer becomes larger as distance becomes larger.

The set distance is d, d's is defined as: when light generates a convergence coke after lens A is converged Point, mobile lens B, make the concave surface of lens B effective outer edge and convergence focus coincide, at this time the concave surface vertex of lens b with The distance on the convex surface lens A vertex is the separated maximum distance of two lens.

The set distance d is calculated by the following formula determination:

D=x_max/tan(θ_max)+|z_max-z₀|

Wherein x_maxIt is ragged edge along the corresponding lens width of light；θ max ragged edge is along the corresponding emergent light angle of light； z_maxThe z-axis coordinate of lens is corresponded to along light for ragged edge；z₀For the corresponding z-axis coordinate z in lens centre₀。

The curved surface of the lens A and lens B are calculated by the following formula determination:

θ i=a1x⁴+a2x³+a3x²+a4x¹+b

Wherein: θ i be i-th light after lens A with horizontal angle；

A1, a2, a3, a4, b are coefficient；

X is normalized effective lens width, and effective lens width refers to that the width that control action is played to light, width are Normalization, value range are (0,1).

The curved surface value range of the lens A and lens B are as follows: to normalize abscissa of the x as coordinate, with emergent ray Angle be ordinate, lower limit C and the corresponding curvilinear equation of upper limit D be as follows:

Each coefficient (a1, a2, a3, a4, b) value of value lower limit C are as follows: (- 0.4229, -0.3895, -0.1696, - 9.4054, -0.0003), angle corresponding to each beam projecting light are as follows:

θ Ci=-0.4229x4-0.3895x3-0.1696x2-9.4054x-0.0003；

Each coefficient (a1, a2, a3, a4, b) value of value upper limit D are as follows: (17.315, -78.684,132.56, - 106.05,0.081), angle corresponding to each beam projecting light are as follows:

θ Di=17.315x4-78.684x3+132.56x2-106.05x+0.081.

The lens subassembly is the component being made of at least a pair of lens A and lens B, or for by multiple lens A and Lens B lines up permutation composition array lens plate.

The array lens plate is revolution or extrusion,

Multiple lens A in same array lens are orderly or unordered arrangement, each lens A match corresponding lens B；

The curved face unit of multiple lens A in same array lens is identical or different, and each lens A matches corresponding lens B.

Each lens in the array lens can arrange as needed, according to the shape size demand of assembly lamps and lanterns Array lens are cut.

Compared with prior art, the utility model has the advantage that

1. the utility model lens group can realize light distribution angle size it is only necessary to change several millimeters of relative position Variation, be conducive to shorten lamps and lanterns volume, save material, reduce lamps and lanterns cost.

2. the lens group of the changeable spot size of the utility model remains during changing light distribution angle 99% light collection efficiency does not have this waste of light substantially, energy saving.

3. the lens group of the changeable spot size of the utility model light distribution always change light distribution angle during Light is always consistent.It ensure that in the different consistency with light quality under light distribution.

4. the lens group of the changeable spot size of the utility model, is not only restricted to lamp luminescence area, lamps and lanterns are original out Angular, the factors such as structure positioning limitation, can realize the change to the spot size of its lamps and lanterns, can apply and penetrate any In lamp, there is good versatility, does not need to be customized for certain lamps and lanterns.This not only accelerates the development time of lamps and lanterns, The cost input of lamps and lanterns exploitation is saved.

5. this lens group can be made slab construction, compared to lens arrangement on the market, what can be done is thinner, more beautiful for this It sees.

6. the size variation of circular light spot not only may be implemented in the utility model, the size that ellipse light spot also may be implemented becomes Change.

7. the utility model can be very easy to realize the surface structure of abnormity by simply cutting.It can satisfy different The demand of shape Design of Luminaires meets personalized Design of Luminaires demand.

8. optical plastic or glass that lens material is lens.

Detailed description of the invention

Fig. 1 is the structural schematic diagram that light passes through lens A；

Fig. 2 is the structural schematic diagram that light passes through lens B；

Fig. 3 is the structural schematic diagram that lens A and lens B fit together；

Fig. 4 is the structural schematic diagram that lens A and lens B changes hot spot；

Fig. 5 is the structural schematic diagram that lens A and lens B is at maximum spacing；

Fig. 6 is lens A and lens B maximum distance computation schematic diagram；

Fig. 7 is the schematic diagram of lens A curved design；

Fig. 8 is the schematic diagram according to the curved design selectable range of curvilinear equation lens A；

Fig. 9 is the curvilinear equation of lens A in embodiment 1；

Figure 10 is to obtain the structural schematic diagram of array lens A by multiple lens A arrays；

Figure 11 is the side view of array lens A in Fig. 9；

Figure 12 is to obtain the structural schematic diagram of array lens B by multiple lens B arrays；

Figure 13 is the side view of array lens B in Fig. 9；

Figure 14 is original lamps and lanterns and its light distribution angle schematic diagram, and wherein a is original lamps and lanterns, and b is with square degree schematic diagram；

Figure 15 be original lamps and lanterns combined with lens array A and lens array B and between the two the structural schematic diagram away from d=0 and Its light distribution angle schematic diagram, wherein a is original lamps and lanterns and lens array combining structure schematic diagram, and b is with square degree schematic diagram；

Figure 16 is that original lamps and lanterns are combined with lens array A and lens array B and between the two away from the structural schematic diagram of d=0.5 And its light distribution angle schematic diagram, wherein a is original lamps and lanterns and lens array combining structure schematic diagram, and b is with square degree schematic diagram；

Figure 17 is that original lamps and lanterns are combined with lens array A and lens array B and between the two away from the structural schematic diagram of d=1.9 And its light distribution angle schematic diagram, wherein a is original lamps and lanterns and lens array combining structure schematic diagram, and b is with square degree schematic diagram；

Figure 18 is the relational graph in the gap of light distribution distribution angle and lens group；

Figure 19 is the structural schematic diagram for stretching array lens, and a is to stretch array lens A, and b is to stretch array lens b；

Figure 20 is the structural schematic diagram of revolution array of structures lens, and a is that revolution array of structures lens A, b are revolution Array of structures lens b.

Specific embodiment

The utility model is described in detail in the following with reference to the drawings and specific embodiments.

Embodiment 1

A kind of lens subassembly of changeable spot size, including lens A1 and lens B2, the lens A1 are flat on one side Face is on one side convex surface, this convex surface is specially designed free form surface；The lens B2 is concave surface on one side, is on one side plane, this Concave surface is specially designed free form surface, and it is not both that lens A1 is that the free form surface of this free form surface and lens A1, which is the same, Outer male structure, lens B2 are concave inward structures.

The free-form surface lens one of two lens are convex and a recessed structure just corresponds, and can be bonded completely.

In actual use, the plane of lens A1 is placed towards LED, the inner concave of lens B2 towards LED.By changing Become the distance between two lens, to achieve the purpose that change lamps and lanterns outgoing light distribution angle.Two lens are bonded completely, at this time lamp Tool emergent light angle does not increase；But as distance between the two increases, lamps and lanterns outgoing light distribution angle becomes larger, this and it is single in the market The scheme of lens it is opposite.Specific work process is as follows:

As shown in Figure 1, light is propagated by left-to-right, but light, after lens A1, light is converged.

As shown in Fig. 2, light is propagated by left-to-right, but light, after lens B2, light is dissipated.

The curved surface of lens A1 and lens B2 are duplicate, so the angle of lens A1 convergence is equal to lens B2 diverging Angle.

As shown in figure 3, when two lens fit together, since the angle of lens A1 convergence is equal to the angle of lens B2 diverging Degree, so beam projecting angular does not change.

As shown in figure 4, when two lens separate, due to the angle that is dissipated with lens B2 of the angle not phase of lens A1 convergence Deng so beam projecting angle is made to become larger, as the distance between two lens increase, beam projecting angle is with increase.

As shown in figure 5, the spacing of lens A1 and lens B2 are up to d, d's is defined as: when light is carried out by lens A1 The focus of a convergence is generated after convergence, mobile lens B2 is overlapped effective outer edge of the concave surface of lens B2 mutually with convergence focus It closes, the maximum distance that the concave surface vertex of lens B2 separates at a distance from the vertex of the convex surface lens A1 for two lens at this time.

Lens A1 and lens B2 relative maximum separation distance, that is, set distance d are calculated by the following formula determination:

D=x_max/tan(θ_max)+|z_max-z₀|

As shown in fig. 6, the design of the curved surface of lens A1 and lens B2

There is a branch of directional light, equidistantly arranged in X-direction, every light of this beam directional light first passes through the flat of lens A Face enters lens A, is then emitted by curved surface, reflects on both faces according to Fresnel reflections law.This lens on light Line exit direction accurately controlled be lens curved surface.Every shooting angle θ i of light and entering for corresponding every light Penetrating position height rayi has following formula to provide.

θ i=a1x⁴+a2x³+a3x²+a4x¹+b

Wherein: θ i be i-th light after lens A with horizontal angle；

A1, a2, a3, a4, b are coefficient；

The curved surface value range of the lens A and lens B are as follows: to normalize abscissa of the x as coordinate, with emergent ray Angle be that (according to mathematically coordinate system, we define schematic diagram and propagate the angle of light to the right by upper left is ordinate Negative), lower limit C and the corresponding curvilinear equation of upper limit D are as follows:

θ Ci=-0.4229x4-0.3895x3-0.1696x2-9.4054x-0.0003；

θ Di=17.315x4-78.684x3+132.56x2-106.05x+0.081.

The curved surface of lens A1 and lens B2 are designed by above-mentioned curvilinear equation, as shown in fig. 7, curvilinear equation is in lower limit C, The region that tri- lines of the upper limit D, E are wrapped up is the curved surface selectable region of the utility model lens A1 and lens B2.

Said lens component can be about axisymmetric revolution, be also possible to the direction of can only controlling stretched Stretch lens.It can be one group of two simple lens when work to work, can also become using simple lens as the unit of array Two array lens combinations are got up to work.

In the present embodiment, using lens subassembly as array lenticular elements, two array lenticular elements are combined work Optical material is PMMA, and the diffusible angular range of light is 0 degree to 40 degree.So maximum shooting angle is 40/2=20 Degree.

The formula of shooting angle θ i of the light after lens A1 refraction is as follows

θ i=-6.1932x⁴+12.958x³+2.2286x²- 28.621x+0.0051,

By can be seen that this equation curve figure is fallen in the region of the composition of CDE described in Fig. 7 as Fig. 8.

The spacing of lens array unit is set as 1.2mm, each one hexagon of unit arrangement.It is set to simplify lens curved surface Meter, the light for selecting 10 lamp spacing to arrange are calculated.It is as shown in table 1 below according to formula calculated result:

Table 1:

By the angle for calculating emergent ray corresponding to this available ten light.According to the incidence angle of known light Corresponding point (such as the following table 2 of lens curved surface can be calculated according to refractive index formula (as follows) with the corresponding angle of emergence It is shown), these points are connected using free curve the spline curve of available curved surface, spline curve is carried out with central axis Rotation obtains the curved surface of lens.

N1sin θ 1=n2sin θ 2

N1 is the refractive index of incident light, and θ 1 is incidence angle；N2 is the refractive index of emergent light, and θ 2 is the angle of emergence

Table 2:

By the angle for calculating emergent ray corresponding to this available ten light.According to the incidence angle of known light Corresponding point (such as the following table 3 of lens curved surface can be calculated according to refractive index formula (as follows) with the corresponding angle of emergence It is shown), these points are connected using free curve the spline curve of available curved surface, spline curve is carried out with central axis Rotation obtains the curved surface of lens.

N1sin θ 1=n2sin θ 2

Table 3:

Multiple lens A are distributed by the Surface Construction lens A using this lens curved surface as convex lens by hexagon, spacing is 1.2mm carries out array and obtains array lens A3.As shown in Fig. 9~10.

Multiple lens B are distributed by the Surface Construction lens B using this lens curved surface as concavees lens by hexagon, spacing is 1.2mm carries out array and obtains array lens B4.As shown in Figure 11~12.

Lens A and lens B relative maximum separation distance d is calculated:

D=x_max/tan(θ_max)+z_max-z₀=0.6/tan20+1-0.773=1.9mm

Illuminate analog result:

It is 15 degree that original lamps and lanterns, which have light distribution angle, and original lamps and lanterns and its light distribution angle schematic diagram, wherein Figure 14 a is original Lamps and lanterns, Figure 14 b are with square degree schematic diagram；

The lens subassembly of the utility model is installed in original lamps and lanterns light-emitting surface, the array being made of multiple lens A is saturating Mirror A3 is opposite with the array lens B4 being made of multiple lens B, and array lens A3 is mounted on the inside, and array lens B4 is mounted on outer Face, as shown in fig. 15 a.The distance d=0 of the two, i.e., each lens A and lens B are bonded completely, between there is no the air gap.At this time Light distribution angle no change has taken place is still 15 degree, as illustrated in fig. 15b, light collection efficiency 99%；

Increase the distance d=0.5m of array lens A3 and array lens B4 between the two, broadens at this time with light distribution, angle Degree is 20.8 degree, as shown in Figure 16 a~16b, light collection efficiency 99%；

Increase the distance d=1.9m of array lens A3 and array lens B4 between the two, broadens at this time with light distribution, angle Degree is 48 degree, as shown in figs. 17 a-17b, light collection efficiency 99%；

By adjusting the size in the gap between lens A and lens B, between available light distribution distribution angle and lens group The relationship of gap is as shown in figure 18.

Embodiment 2

As shown in figure 19, lens A is made into stretching structure, and drawing is formed by the lens A arranged in parallel of multiple stretching structures Array lens A is stretched, as shown in figure 19a, lens B is made into stretching structure, and by the lens B arranged in parallel group of multiple stretching structures At array B is stretched, as shown in fig. 19b, remaining is the same as embodiment 1.

Embodiment 3

As shown in figure 20, lens A is made into revolution structure, and concentric circles knot is pressed by the lens A of multiple revolution structures Structure rearranges stretching array lens A and lens B is made into revolution structure, and by multiple revolution structures as illustrated in fig. 20 Lens B by concentric structure rearrange stretch array lens B, as shown in fig. 20b, remaining is the same as embodiment 1.

Claims

1. a kind of lens subassembly of changeable spot size, which is characterized in that including lens A and lens B, the lens A mono- Face is plane, is on one side convex surface, and it is on one side plane, the convex surface of lens A and the concave surface of lens B have that the lens B, which is concave surface, Identical curved surface.

2. a kind of lens subassembly of changeable spot size according to claim 1, which is characterized in that the lens A It is assemblied in the light-emitting surface of lamps and lanterns, the plane of lens A and the light-emitting surface of lamps and lanterns fit, the convex surface of lens A and the concave surface phase of lens B Fitting.

3. a kind of lens subassembly of changeable spot size according to claim 1 or 2, which is characterized in that by adjusting Spacing between lens A and lens B realizes the adjusting to spot size.

4. a kind of lens subassembly of changeable spot size according to claim 3, which is characterized in that when two lens are complete The angle changed when full fitting is minimum, and hot spot is suitable with the hot spot of original lamps and lanterns；As distance becomes larger between two lens, lamps and lanterns Hot spot is also with becoming larger；When the distance between two lens increase to set distance, hot spot no longer becomes larger, no longer as distance becomes Become larger greatly.

5. a kind of lens subassembly of changeable spot size according to claim 4, which is characterized in that the setting away from From for d, d's is defined as: when light generates a convergence focus after lens A is converged, mobile lens B makes lens B's The effective outer edge and convergence focus of concave surface coincide, and the concave surface vertex of lens b is two at a distance from the vertex of the convex surface lens A at this time The separated maximum distance of a lens.

6. a kind of lens subassembly of changeable spot size according to claim 5, which is characterized in that the setting away from Determination is calculated by the following formula from d:

D=x_max/tan(θ_max)+|z_max-z₀|

Wherein x_maxIt is ragged edge along the corresponding lens width of light；θ max ragged edge is along the corresponding emergent light angle of light；z_max The z-axis coordinate of lens is corresponded to along light for ragged edge；z₀For the corresponding z-axis coordinate z in lens centre₀。

7. a kind of lens subassembly of changeable spot size according to claim 1, which is characterized in that the lens A Determination is calculated by the following formula with the curved surface of lens B:

θ i=a1x⁴+a2x³+a3x²+a4x¹+b

Wherein: θ i be i-th light after lens A with horizontal angle；

A1, a2, a3, a4, b are coefficient；

X is normalized effective lens width, and effective lens width refers to the width that control action is played to light, and width is normalizing Change, value range is (0,1).

8. a kind of lens subassembly of changeable spot size according to claim 7, which is characterized in that the lens A With the curved surface value range of lens B are as follows: to normalize abscissa of the x as coordinate, using the angle of emergent ray as ordinate, lower limit C and the corresponding curvilinear equation of upper limit D are as follows:

θ Ci=-0.4229x4-0.3895x3-0.1696x2-9.4054x-0.0003；

Each coefficient (a1, a2, a3, a4, b) value of value upper limit D are as follows: (17.315, -78.684,132.56, -106.05, 0.081), angle corresponding to each beam projecting light are as follows:

θ Di=17.315x4-78.684x3+132.56x2-106.05x+0.081.

9. a kind of lens subassembly of changeable spot size according to claim 1, which is characterized in that the lens group Part is the component being made of at least a pair of lens A and lens B, or forms array to line up permutation by multiple lens A and lens B Lens plate.

10. a kind of lens subassembly of changeable spot size according to claim 9, which is characterized in that the array Lens plate is revolution or extrusion.

11. a kind of lens subassembly of changeable spot size according to claim 9 or 10, which is characterized in that with a burst of Multiple lens A in column lens are orderly or unordered arrangement, each lens A match corresponding lens B.

12. a kind of lens subassembly of changeable spot size according to claim 9 or 10, which is characterized in that with a burst of The curved face unit of multiple lens A in column lens is identical or different, and each lens A matches corresponding lens B.

13. a kind of lens subassembly of changeable spot size according to claim 9 or 10, which is characterized in that described Each lens in array lens can arrange as needed, be carried out array lens according to the shape size demand of assembly lamps and lanterns It cuts.