CN103574504A - Optical lens and illumination device using the same - Google Patents

Optical lens and illumination device using the same Download PDF

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Publication number
CN103574504A
CN103574504A CN201310320804.5A CN201310320804A CN103574504A CN 103574504 A CN103574504 A CN 103574504A CN 201310320804 A CN201310320804 A CN 201310320804A CN 103574504 A CN103574504 A CN 103574504A
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lens
optical lens
light source
fresnel structure
fresnel
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白川友树
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Panasonic Intellectual Property Management Co Ltd
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Matsushita Electric Industrial Co Ltd
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Abstract

一种用于控制从光源发射的光的分布的光学透镜，所述光学透镜包括形成板形状的透镜体。透镜体在厚度方向上具有相对的第一表面和第二表面。透镜体在第一表面和第二表面处分别设置有凹透镜和凸透镜。凹透镜由以下菲涅尔透镜限定：在该菲涅尔透镜中，沿着垂直于厚度方向的第一方向延伸的多个凹透镜表面布置在分别垂直于厚度方向和第一方向的第二方向上。凸透镜由以下菲涅尔透镜限定：在该菲涅尔透镜中，沿着垂直于厚度方向且与第一方向交叉的第三方向延伸的多个凸透镜表面布置在分别垂直于厚度方向和第三方向的第四方向上。

Figure 201310320804

An optical lens for controlling distribution of light emitted from a light source includes a lens body formed in a plate shape. The lens body has opposite first and second surfaces in the thickness direction. The lens body is respectively provided with a concave lens and a convex lens at the first surface and the second surface. The concave lens is defined by a Fresnel lens in which a plurality of concave lens surfaces extending along a first direction perpendicular to the thickness direction are arranged in second directions respectively perpendicular to the thickness direction and the first direction. The convex lens is defined by a Fresnel lens in which a plurality of convex lens surfaces extending in a third direction perpendicular to the thickness direction and crossing the first direction are arranged at in the fourth direction.

Figure 201310320804

Description

Optical lens and use the illuminating equipment of this optical lens
Technical field
The present invention relates to optical lens and use the illuminating equipment of this optical lens.
Background technology
In the past, provide and be placed in before light source and control optical lens from the distribution of the light of light source transmitting (for example,, referring to file 1[JP2010-177028A]).This optical lens consists of a pair of lens unit.Lens unit forms identical shape and arranges about the symmetrical of light source.Each lens unit has for the plane of incidence of light with for the exit facet of light.The plane of incidence forms groove shape.Exit facet is limited by flattened spherical surface.And the shape of each lens unit is to obtain by rotary body being flattened to have predetermined height, this rotary body is that the ellipse by rotating around major axis with major axis and minor axis obtains.At this optical lens for being configured for illuminating the situation of the illuminating equipment of road, on the crosspoint of the single led major axis that is positioned at each the flat orbicule that forms lens unit.And this illuminating equipment is arranged so that the longitudinal direction of optical lens is identical with the longitudinal direction of road.Thereby the wide region of effectively illuminating road on the longitudinal direction of road is possible.
According to disclosed optical lens in file 1, illuminating equipment is arranged as and makes the longitudinal direction of optical lens identical with the longitudinal direction of road, can effectively illuminate the wide region of road on the longitudinal direction of road.Yet, because optical lens is relatively thick, so its formability is poor.The formation particularly with the large lens of this shape is difficult.
Summary of the invention
For above-mentioned deficiency, the present invention is intended to propose to have the formability of improvement, the illuminating equipment that keeps the optical lens of its light distribution property simultaneously and use this optical lens.
According to the optical lens of first aspect present invention, be for controlling the optical lens of the distribution of the light of launching from light source, and comprise the lenticular body that forms plate shape.Lenticular body has relative first surface and second surface on thickness direction.Lenticular body is respectively arranged with concavees lens and convex lens at first surface and second surface place.Concavees lens are limited by following Fresnel Lenses: in this Fresnel Lenses, a plurality of concavees lens surface of extending along first direction perpendicular to thickness direction is arranged in respectively in the second direction perpendicular to thickness direction and first direction.Convex lens are limited by following Fresnel Lenses: in this Fresnel Lenses, a plurality of convex lens surfaces that extend along the third direction intersecting perpendicular to thickness direction and with first direction are arranged in respectively in the fourth direction perpendicular to thickness direction and third direction.
About described optical lens according to a second aspect of the invention, in first aspect, described first surface defines light incident surface.
About described optical lens according to a third aspect of the invention we, first or second aspect, described first surface is concave surface.
About described optical lens according to a forth aspect of the invention, first, to the either side in the third aspect, described first surface is provided with convex lens in its each opposite end in described second direction.
Illuminating equipment according to a fifth aspect of the invention comprises the equipment body that is designed to hold light source; And be placed in the optical lens before described light source.The either side of described optical lens in first to fourth aspect limits.
About described illuminating equipment according to a sixth aspect of the invention, aspect the 5th, described illuminating equipment also comprises and is designed to the reflecting plate to front-reflection by the part of the light from the transmitting of described light source.
About described illuminating equipment according to a seventh aspect of the invention, aspect the 6th, described reflecting plate is placed on the side of described optical lens along fourth direction.
Accompanying drawing explanation
Fig. 1 is the perspective view of watching from upside, its example the lenticular body of optical lens according to an embodiment of the invention;
Fig. 2 is the perspective view of watching from downside, its example the lenticular body of optical lens of above embodiment;
Fig. 3 is perpendicular to the sectional view of longitudinal direction, its example the lenticular body of optical lens of above embodiment;
Fig. 4 is perpendicular to the sectional view of width, its example the lenticular body of optical lens of above embodiment;
Fig. 5 is example uses the perspective view of illuminating equipment of the optical lens of above embodiment;
Fig. 6 is example uses the perspective view of illuminating equipment of the optical lens of above embodiment, and the lid of this illuminating equipment has been removed;
Fig. 7 is example uses the sectional view of illuminating equipment of the optical lens of above embodiment;
Fig. 8 has been the example optical lens of above embodiment and the perspective view of reflecting plate;
Fig. 9 the has been example optical lens of above embodiment and the front view of reflecting plate;
Figure 10 the has been example optical lens of above embodiment and the top view of reflecting plate;
Figure 11 is example uses the schematic diagram of example of installation of illuminating equipment of the optical lens of above embodiment;
Figure 12 is example uses the schematic diagram of another example of installation of illuminating equipment of the optical lens of above embodiment;
Figure 13 is the perspective view of watching from upside, its example first the revising of lenticular body of optical lens of above embodiment;
Figure 14 is the perspective view of watching from downside, its example first revise;
Figure 15 is perpendicular to the sectional view of width, its example first revise;
Figure 16 is perpendicular to the sectional view of longitudinal direction, its example first revise;
Figure 17 is the perspective view of watching from upside, its example second the revising of lenticular body of optical lens of above embodiment;
Figure 18 is the perspective view of watching from downside, its example second revise;
Figure 19 is perpendicular to the sectional view of longitudinal direction, its example second revise; And
Figure 20 is perpendicular to the sectional view of width, its example second revise.
The specific embodiment
The optical lens 1 of the present embodiment and illuminating equipment A have been carried out to the following explanation referring to figs. 1 through Figure 20.
As shown in Figure 11 and Figure 12, for example, the illuminating equipment A of the present embodiment is as the street lamp that illuminates road R1.In this case, illuminating equipment A is attached to the summit of the bar 100 of erectting along road R1.Except as otherwise noted, in the following description, the direction forward and backward of direction indication the present embodiment up and down in Fig. 9, and the direction left and to the right of direction indication the present embodiment left and to the right in Fig. 9, and the direction up and down of direction indication the present embodiment up and down in Figure 10.
As shown in Figures 5 to 7, the illuminating equipment A of the present embodiment comprises light source (light source cell) 3, optical lens 1, reflecting plate 2 and power subsystem 6.Optical lens 1 be placed in light source cell 3 before.Reflecting plate 2 is placed in left side and the right side of optical lens 1.Power subsystem 6 provides electric power for lighting light source cell 3 to light source cell 3.And the illuminating equipment A of the present embodiment comprises equipment body 4, light transmission (transparent or translucent) panel 5 and heat-sink unit 7.Equipment body 4 is designed for and holds optical lens 1, reflecting plate 2, light source cell 3 and power subsystem 6.Light-transmissive surface plate 5 is assemblied in the opening in the front surface that is formed at equipment body 4.Heat-sink unit 7 is fixed on the rear surface of equipment body 4.
As shown in Figures 1 to 4, optical lens 1 comprises lenticular body (lens substrate) 11, and it forms arc shape in side view.There are standing part 12 and 12, its be arranged on lenticular body 11 direction up and down opposite end and be diagonal position (seeing Fig. 8 to Figure 10).It is noted that lenticular body 11 can form circle (ellipse) plate shape rather than rectangular plate shape.
Each standing part 12 is provided with patchhole 12a, and hold-down screw 8 inserts by this patchhole 12a.By the hold-down screw inserting by each patchhole 12a being fixed to the bottom of the body 41 of equipment body 4, optical lens 1 is fixed on equipment body 4.
Fig. 1 to Fig. 4 shows the basic example of lenticular body 11 of the optical lens 1 of the present embodiment.In the following description, if necessary, the optical lens 1 of basic example is demarcated by reference number 1A, and the lenticular body 11 of basic example is demarcated by reference number 11A.
As shown in figures 1 and 3, be formed at lenticular body 11(11A) in front surface (that is, light exit surface 11a) be the second Fresnel structure 13.The second Fresnel structure 13 consists of a plurality of prone convex lens surface 13a.In the second Fresnel structure 13, perpendicular to the sectional view of direction (longitudinal direction) up and down, be zigzag fashion, and the upper optical axis P1 about light source cell 3 of the second Fresnel structure 13 direction (width) left and is to the right symmetrical.In addition, each convex lens surface 13a forms rectilinear form, and extends on the longitudinal direction of lenticular body 11A.In addition, exist on the longitudinal direction of lenticular body 11A, extend and between each to the groove 13b between adjacent convex lens surface 13a.
As shown in Figure 2 and Figure 4, be formed at lenticular body 11A rear surface (that is, light incident surface 11b) be the first Fresnel structure 14.The first Fresnel structure 14 consists of a plurality of prone concavees lens surface 14a.In the first Fresnel structure 14, perpendicular to the sectional view of direction (width) left and to the right, be zigzag fashion, and the first Fresnel structure 14 is symmetrical at the upper optical axis P1 about light source cell 3 of direction (longitudinally) up and down.In addition, each concavees lens surface 14a forms rectilinear form and extends on the width of lenticular body 11A.In addition, exist on the width of lenticular body 11A, extend and between each to the groove 14b between adjacent concavees lens surface 14a.
In this regard, being formed at the first Fresnel structure 14 in the light incident surface 11b of lenticular body 11A extends along the width of lenticular body 11A.And, be formed at the second Fresnel structure 13 in the light exit surface 11a of lenticular body 11A and extend along the longitudinal direction of lenticular body 11A.In brief, in the optical lens 1A of this example, the first Fresnel structure 14 and the second Fresnel structure 13 are perpendicular to one another.The first Fresnel structure 14 forms concavees lens, and the second Fresnel structure 13 forms convex lens.In addition,, in the optical lens 1A of this example, the opposite end of the lenticular body 11A on the bearing of trend of groove 13b of the second Fresnel structure 13 that forms convex lens is downward towards light source cell 3(, in Fig. 9) bending.
As mentioned above, lenticular body 11A forms plate shape (in the example of example, rectangular plate shape).Lenticular body 11A has first surface (lower surface in Fig. 3 and Fig. 4) and second surface (upper surface in Fig. 3 and Fig. 4), first surface and second surface on thickness direction (in Fig. 3 and Fig. 4, direction up and down) toward each other.
In lenticular body 11A, first surface limits light incident surface 11b.And first surface is concave surface, wherein perpendicular to the sectional view in the plane of width (in Fig. 3 direction) and to the right, there is spill (see figure 4) left.In addition, second surface defines light exit surface 11a.And second surface is convex surface, wherein perpendicular to the sectional view in the plane of width (in Fig. 3 direction) and to the right, there is convex (see figure 4) left.
Lenticular body 11A is respectively arranged with concavees lens (the first Fresnel structure) 14 and convex lens (the second Fresnel structure) 13 on first surface (light incident surface 11b) and second surface (light exit surface 11a).In brief, concavees lens (the first Fresnel structure) 14 are formed in first surface (light incident surface 11b), and convex lens (the second Fresnel structure) 13 are formed in second surface (light exit surface 11a).
Concavees lens 14 are limited by Fresnel Lenses (recessed Fresnel Lenses), wherein along the first direction (width perpendicular to thickness direction; Direction left and to the right in Fig. 3) a plurality of concavees lens surface 14a extending is arranged in respectively the second direction (longitudinal direction perpendicular to thickness direction and first direction; Direction left and to the right in Fig. 4) on.In other words, concavees lens 14 form linear Fresnel lens shape, and consist of a plurality of straight concave prisms that extend on the width of lenticular body 11A (concavees lens surface 14a).In brief, concavees lens 14 are recessed linear Fresnel lens.
Convex lens 13 are limited by Fresnel Lenses (protruding Fresnel Lenses), wherein along perpendicular to thickness direction and with first direction (width; Direction left and to the right in Fig. 3) third direction (longitudinal direction intersecting; Direction left and to the right in Fig. 4) a plurality of convex lens surface 13a that extend are arranged in respectively the fourth direction (width perpendicular to thickness direction and third direction; Direction left and to the right in Fig. 3) on.In other words, convex lens 13 form linear Fresnel lens shape, and consist of a plurality of straight convex prism extending on the longitudinal direction at lenticular body 11A (convex lens surface 13a).In brief, convex lens 13 are protruding linear Fresnel lens.It is noted that third direction needn't be identical with second direction, and fourth direction needn't be identical with first direction.Yet preferably, third direction is identical with second direction and first direction respectively with fourth direction.
Reflecting plate 2 is designed to the part of the light from light source cell 3 transmittings to front-reflection.Reflecting plate 2 is along fourth direction (width; Direction left and to the right in Fig. 9 and Figure 10) be placed on the side of optical lens 1.
As shown in Fig. 8 to Figure 10, reflecting plate 2 comprises the reflecting part 21 that forms the rectangular plate shape in direction up and down with long size.Exist along the direction up and down standing part 22 that each opposite end of 21 arranges in reflecting part.Each standing part 22 forms L shaped shape.Each standing part 22 is provided with patchhole 22a, and hold-down screw 8 inserts by patchhole 22a.By the hold-down screw 8 inserting by each patchhole 22a being fixed to the bottom of the body 41 of equipment body 4, reflecting plate 2 is fixed to equipment body 4.And in reflecting plate 2, as shown in Figure 9, extend from the summit (front end) of standing part 22 reflecting part 21, and tilt with angle θ 1 with respect to direction forward and backward (in Fig. 9 direction) up and down.Therefore, to front-reflection from light source cell 3 transmitting but laterally advance only possible.
As shown in Fig. 7 and Fig. 9, light source cell 3 comprises mounting substrate 31.Be arranged on mounting substrate 31 front surfaces (upper surface in Fig. 9) is LED chip 32.LED chip 32 is lighted with the brightness of being scheduled to by the electric power of being supplied by power subsystem 6.
Equipment body 4 for example, is made by the material (, aluminum and its alloy) with high heat conductance.Equipment body 4 comprises body 41 and lid 42.Body 41 forms has open surfaces (front surface; Lower surface in Fig. 6) rectangular box shape.Lid 42 is attached to body 41 so that the open front of nappe 41.Body 41 has recess 41a, and, as shown in Figure 6 and Figure 7, whole four optical lenses 1 of arranging in two row of the longitudinal direction along body 41 and arranging in two row of the width along body 41 are placed on recess 41a, cover each self-corresponding light source cell 3.And each optical lens 1 is oriented to and makes its longitudinal direction identical with body 41 widths.And, in reflecting plate 2 direction left and to the right, be placed in the both sides of each lens 1, make the longitudinal direction of reflecting part 21 be parallel to the longitudinal direction of lenticular body 11.In addition, power subsystem 6 is arranged in the bottom side (Fig. 7 left side) of the recess 41a of body 41.Power subsystem 6 is electrically coupled to each light source cell 3 via power cable (not shown).
Lid 42 part place towards optical lens 1 and reflecting plate 2 when lid 42 is fixed to body 41 is provided with opening 42a.Opening 42a forms rectangle.Use suitable fixed form be assembled in opening 42a be light-transmissive surface plate 5(for example, glass plate).Light-transmissive surface plate 5 forms rectangular plate shape.Therefore, from the light of light source cell 3 transmittings, pass optical lens 1, and subsequently through light-transmissive surface plate 5, and be emitted to outside.Also have, as shown in Figure 5 and Figure 6, the part place of equipment body 4 on the bottom side (left side in Fig. 5) of equipment body 4 is connected in bar 100.
Heat-sink unit 7 comprises a plurality of heat radiating fins 71 of for example, being made by the material with high heat conductance (, aluminum and its alloy).Heat-sink unit 7 is fixed on the rear surface (upper surface in Fig. 5) of the body 41 of equipment body 4.By heat-sink unit 7 is set, the heat generating at light source cell 3 places is passed to heat radiating fin 71 via body 41, and is radiated to outside via heat radiating fin 71.
As shown in FIG. 11 and 12, aforementioned illuminating equipment A is fixed to respectively the summit of the bar 100 of for example erectting along road R1.When illuminating equipment A is attached to bar 100, illuminating equipment A is oriented to and makes the direction up and down (longitudinal direction) of each optical lens 1 along the longitudinal direction extension of road R1.Therefore, from the light of light source cell 3 transmitting by the first Fresnel structure 14 outward diffusions that are formed in the light incident surface 11b of lenticular body 11 of optical lens 1.As a result, can illuminate the wide region on the longitudinal direction of road R1.
And, about the width of road R1, from the light of light source cell 3 transmitting, by the second Fresnel structure 12 being formed in the light exit surface 11a of lenticular body 11 of optical lens 1, focused on inwards.In addition, laterally the light of (outwards) transmitting is reflected inwards by the reflecting plate 2 that is placed in optical lens 1 both sides.As a result, because the light of launching on the width at road R1 does not have outward diffusion, so as shown in Figure 11 and Figure 12 on road R1 gathered light be possible.It is noted that the region a1 shown in Figure 11 and Figure 12 represents the field of illumination of each illuminating equipment A, and the region a2 shown in Figure 12 represents the overlapping region of the field of illumination of adjacent illuminating equipment A.By forming overlapping field of illumination, the not illuminated area reducing between adjacent illuminating equipment A is possible.
Figure 13 to Figure 16 shows the modification (first revise) of lenticular body 11 of the optical lens 1 of the present embodiment.In the following description, if desired, the first optical lens 1 and lenticular body 11 of revising demarcated by reference number 1B and 1B respectively.
Lenticular body 11(11B) in side view, form arc shape.As shown in Figure 13 and 15, being formed in the front surface (that is, light exit surface 11a) of lenticular body 11B is the second Fresnel structure 15.The second Fresnel structure 15 consists of recurvate a plurality of concavees lens surface 15a.In the second Fresnel structure 15, perpendicular to the sectional view of direction (width) left and to the right, be zigzag fashion, and the second Fresnel structure 15 is symmetrical at the upper optical axis P2 with respect to light source cell 3 of direction (longitudinal direction) up and down.In addition, each concave lens surface 15a forms rectilinear form and extends along the width of lenticular body 11B.In addition, exist along the width of lenticular body 11B extend and between each to the groove 15b between adjacent concavees lens surface 15a.Also have, lenticular body 11 is provided with prone convex lens surface 17(Fresnel structure).Convex lens surface 17 is positioned on each opposite end away from optical axis P2 of light exit surface 11a of lenticular body 11B.
As shown in Figure 14 and Figure 16, being formed in the rear surface (that is, light incident surface 11b) of lenticular body 11B is the first Fresnel structure 16.The first Fresnel structure 16 consists of recurvate a plurality of convex lens surface 16a.In the first Fresnel structure 16, perpendicular to the sectional view of direction (longitudinal direction) up and down, be zigzag fashion, and the upper optical axis P2 about light source cell 3 of the first Fresnel structure 16 direction (width) left and is to the right symmetrical.In addition, each convex lens surface 16a forms rectilinear form, and extends along the longitudinal direction of lenticular body 11B.In addition, exist along the longitudinal direction of lenticular body 11B extend and between each to the groove 16b between adjacent convex lens surface 16a.
In this regard, the first Fresnel structure 16 being formed in the light incident surface 11b of lenticular body 11B extends along the direction up and down (longitudinal direction) of lenticular body 11B.And the second Fresnel structure 15 being formed in the light exit surface 11a of lenticular body 11B extends along the direction left and to the right (width) of lenticular body 11B.In brief, in the optical lens 1B of this example, the first Fresnel structure 16 and the second Fresnel structure 15 are perpendicular to one another.The first Fresnel structure 16 forms convex lens, and the second Fresnel structure 15 forms concavees lens.In addition,, in the optical lens 1B of this example, the opposite end of the lenticular body 11B on the bearing of trend of groove 16b of the first Fresnel structure 16 that forms convex lens is downward towards light source cell 3(, in Figure 15) bending.
As mentioned above, lenticular body 11B forms plate shape (in the example of example, rectangular plate shape).Lenticular body 11B has at the upper each other relative first surface (upper surface in Figure 15 and Figure 16) of thickness direction (in Figure 15 and Figure 16, direction up and down) and second surface (lower surface in Figure 15 and Figure 16).
In lenticular body 11B, first surface defines light exit surface 11a.And first surface is convex surface, wherein perpendicular to the sectional view in the plane of width (in Figure 16 direction) and to the right, there is convex (seeing Figure 15) left.In addition, second surface defines light incident surface 11b.And second surface is concave surface, wherein perpendicular to the sectional view in the plane of width (in Figure 16 direction) and to the right, there is spill (seeing Figure 15) left.
Lenticular body 11B locates to be respectively arranged with concavees lens (the second Fresnel structure) 15 and convex lens (the first Fresnel structure) 16 at first surface (light exit surface 11a) and second surface (light incident surface 11b).In brief, concavees lens (the second Fresnel structure) 15 are formed in first surface (light exit surface 11a), and convex lens (the first Fresnel structure) 16 are formed in second surface (light incident surface 11b).
Concavees lens 15 are limited by Fresnel Lenses (recessed Fresnel Lenses), wherein along the first direction (width perpendicular to thickness direction; Direction left and to the right in Figure 16) a plurality of concavees lens surface 15a extending is arranged in respectively the second direction (longitudinal direction perpendicular to thickness direction and first direction; Direction left and to the right in Figure 15) on.In other words, concavees lens 15 form linear Fresnel lens shape, and consist of a plurality of straight concave prism extending on the width at lenticular body 11B (concavees lens surface 15a).In brief, concavees lens 15 are recessed linear Fresnel lens.
Convex lens 16 are limited by Fresnel Lenses (protruding Fresnel Lenses), wherein along perpendicular to thickness direction and the third direction (longitudinal direction that intersects with first direction (width, direction left and to the right in Figure 16); Direction left and to the right in Figure 15) a plurality of convex lens surface 16a that extend are arranged in respectively the fourth direction (width perpendicular to thickness direction and third direction; Direction left and to the right in Figure 16) on.In other words, convex lens 16 form linear Fresnel lens shape, and consist of a plurality of straight convex prism extending on the longitudinal direction at lenticular body 11B (convex lens surface 16a).In brief, convex lens 16 are protruding linear Fresnel lens.It is noted that third direction needn't be identical with second direction, and fourth direction needn't be identical with first direction.Yet preferably, third direction is identical with second direction and first direction respectively with fourth direction.
And in lenticular body 11B, first surface (light exit surface 11a) is at second direction (longitudinal direction; Direction and to the right) above at its each place, opposite end, be provided with convex lens (convex lens surface) 17 left.
Also have, optical lens 1B is fixed to body 41, makes the width of the longitudinal direction of optical lens 1B and the body 41 of equipment body 4 identical, similar with the mode of the optical lens 1A shown in Fig. 1 to Fig. 4.
Figure 17 to Figure 20 shows another of lenticular body 11 of the optical lens 1 of the present embodiment and revises (second revises).In the following description, if desired, the second optical lens 1 and lenticular body 11 of revising demarcated by reference number 1C and 11C respectively.
Lenticular body 11C forms approximate rectangular plate shape.As shown in Figure 17 and 19, being formed in the front surface (that is, light exit surface 11a) of lenticular body 11C is the second Fresnel structure 18.The second Fresnel structure 18 consists of prone a plurality of convex lens surface 18a.In the second Fresnel structure 18, perpendicular to the sectional view of direction (longitudinal direction) up and down, be zigzag fashion, and the upper optical axis P3 about light source cell 3 of the second Fresnel structure 18 direction (width) left and is to the right symmetrical.In addition, each convex lens surface 18a forms rectilinear form and extends along the longitudinal direction of lenticular body 11C.In addition, exist along the longitudinal direction of lenticular body 11C extend and between each to the groove 18b between adjacent convex lens surface 18a.
As shown in Figure 18 and 20, being formed in the rear surface (that is, light incident surface 11b) of lenticular body 11C is the first Fresnel structure 19.The first Fresnel structure 19 consists of prone a plurality of concavees lens surface 19a.In the first Fresnel structure 19, perpendicular to the sectional view of direction (width) left and to the right, be zigzag fashion, and the first Fresnel structure 19 is symmetrical at the upper optical axis P3 about light source cell 3 of direction (longitudinal direction) up and down.In addition, each concavees lens surface 19a forms rectilinear form, and extends along the width of lenticular body 11C.In addition, exist on the width of lenticular body 11C, extend and between each to the groove 19b between adjacent concavees lens surface 19a.
In this regard, the first Fresnel structure 19 being formed in lenticular body 11C light incident surface 11b extends along the direction left and to the right (width) of lenticular body 11C.And the second Fresnel structure 18 being formed in the light exit surface 11a of lenticular body 11C extends along the direction up and down (longitudinal direction) of lenticular body 11C.In brief, in the optical lens 1C of this example, the first Fresnel structure 19 and the second Fresnel structure 18 are perpendicular to one another.The first Fresnel structure 19 forms concavees lens, and the second Fresnel structure 18 forms convex lens.
As mentioned above, lenticular body 11C forms plate shape (in the example of example, rectangular plate shape).Lenticular body 11C has at the upper each other relative first surface (lower surface in Figure 19 and Figure 20) of thickness direction (in Figure 19 and Figure 20, direction up and down) and second surface (upper surface in Figure 19 and Figure 20).
In lenticular body 11C, first surface defines light incident surface 11b, and second surface defines light exit surface 11a.Each in the first and second surfaces is smooth surface.
Lenticular body 11C locates to be respectively arranged with concavees lens (the first Fresnel structure) 19 and convex lens (the second Fresnel structure) 18 at first surface (light incident surface 11b) and second surface (light exit surface 11a).In brief, concavees lens (the first Fresnel structure) 19 are formed in first surface (light incident surface 11b), and convex lens (the second Fresnel structure) 18 are formed in second surface (light exit surface 11a).
Concavees lens 19 are limited by Fresnel Lenses (recessed Fresnel Lenses), wherein along the first direction (width perpendicular to thickness direction; Direction left and to the right in Figure 19) a plurality of concavees lens surface 19a extending is arranged in respectively the second direction (longitudinal direction perpendicular to thickness direction and first direction; Direction left and to the right in Figure 20) on.In other words, concavees lens 19 form linear Fresnel lens shape, and consist of a plurality of straight concave prism extending along lenticular body 11C width (concavees lens surface 19a).In brief, concavees lens 19 are recessed linear Fresnel lens.
Convex lens 18 are limited by Fresnel Lenses (protruding Fresnel Lenses), wherein along perpendicular to thickness direction and the third direction (longitudinal direction that intersects with first direction (width, direction left and to the right in Figure 19); Direction left and to the right in Figure 20) a plurality of convex lens surface 18a that extend are arranged in respectively the fourth direction (width perpendicular to thickness direction and third direction; Direction left and to the right in Figure 19) on.In other words, convex lens 18 form linear Fresnel lens shape, and consist of a plurality of straight convex prism extending on the longitudinal direction at lenticular body 11C (convex lens surface 18a).In brief, convex lens 18 are protruding linear Fresnel lens.It is noted that third direction needn't be identical with second direction, and fourth direction needn't be identical with first direction.Yet preferably, third direction is identical with second direction and first direction respectively with fourth direction.
Also have, optical lens 1C is fixed on body 41, makes the width of the longitudinal direction of optical lens 1C and the body 41 of equipment body 4 identical, similar with the mode of the optical lens 1A shown in Fig. 1 to Fig. 4.
As mentioned above, the optical lens 1 of the present embodiment is placed in before light source and controls from the distribution of the light of light source transmitting.In this optical lens 1, be formed at linearity the first Fresnel structure (14 in light incident surface 11b, 16,19) and be formed at linearity the second Fresnel structure (13,15 in light exit surface 11a, 18) be perpendicular to one another, and the first Fresnel structure (14,16,19) and the second Fresnel structure (13,15,18) in one as convex lens and another is as concavees lens.
And in the optical lens 1 of the present embodiment, the first Fresnel structure (14,19) forms concavees lens, and the second Fresnel structure (13,18) forms convex lens.And in the optical lens 1 of the present embodiment, lenticular body 11 is with respect to forming the first Fresnel structure (14,16,19) and the second Fresnel structure (13,16,18) groove direction of the Fresnel structure of the convex lens in (13,15,18) is towards light source (light source cell) 3 bendings.In addition, in the optical lens 1 of the present embodiment, about Fresnel structure (15) wherein, form the surface (light exit surface 11a) of the concavees lens in the first Fresnel structure (16) and the second Fresnel structure (15), the Fresnel structure (15) that forms concavees lens is formed at around the optical axis of light source (light source cell) 3, and the Fresnel structure (17) of formation convex lens is formed at the opposite end away from optical axis.
According to the present embodiment, be formed at the first Fresnel structure (14 in the light exit surface 11a of lenticular body 11,16,19) and be formed at the second Fresnel structure (13,15 in the light incident surface 11b of lenticular body 11,18) be perpendicular to one another, and the first Fresnel structure (14,16,19) and the second Fresnel structure (13,15,18) formation convex lens in and another forms concavees lens.Therefore, from the light of light source cell 3 transmitting, can distribute thering is wide-angle region at specific direction, and can in the direction perpendicular to this specific direction, have on the region of narrow angle and distribute.
When this illuminating equipment A is when the street lamp, as shown in Figure 11 and Figure 12, the wide region of illuminating road R1 along the longitudinal direction of road R1 is possible, and is also possible along width gathered light on road R1 of road R1.Therefore, light distribution property can maintain par with the light distribution property of existing optical lens.
And, because each in light incident surface 11b and light exit surface 11a forms Fresnel shape, so can attenuate lens.Therefore it is possible, reducing production costs and be convenient to form large lens.
And, as shown in Figure 1 to Figure 4 with shown in Figure 13 to Figure 16, the direction that lenticular body 11 is extended with respect to the groove (13b, 16b) along forming the Fresnel structure (13,16) of convex lens in its opposite end towards light source cell 3 bendings.The amount of the light of therefore, launching forward can increase the amount of the light by the sweep transmitting to lenticular body 11.
In addition, as shown in Figure 13 to 16, about exit facet 11a, wherein formed second Fresnel structure 15 that forms concavees lens, convex lens surface 17 has been set to each opposite end away from the optical axis P2 of light source cell 3.The light of therefore, advancing towards above opposite end can inwardly be assembled.As a result, can increase the amount of the light that is emitted to predetermined field of illumination.
In addition,, described in the present embodiment, reflecting plate 2 is at the Fresnel structure (13 perpendicular to forming convex lens, 16,18) and in the direction of the optical axis of light source cell 3, the direction left and to the right (width) of the lenticular body 11 of optical lens 1 is upper, is positioned at the both sides of optical lens 1.In the case, reflecting plate 2 can be to internal reflection from light source cell 3 transmitting then lateral rows and then the not light of scioptics 1.Therefore, can increase the amount of the light of transmitting forward.
It is noted that the optical lens 1 of describing in the present embodiment is one of them example.For example, the second Fresnel structure that is formed at the first Fresnel structure in light incident surface and is formed in light exit surface is perpendicular to one another, and one in the first Fresnel structure and the second Fresnel structure can form convex lens, and another can form concavees lens.At the present embodiment, illuminating equipment A has been described wherein for the example of street lamp.Yet the application of illuminating equipment is not limited to street lamp, but illuminating equipment can be in other lamp such as street lamp and garden lamp.
As mentioned above, the optical lens 1 of the present embodiment comprises following First Characteristic.About First Characteristic, optical lens 1 is for controlling the optical lens of the distribution of the light of launching from light source (light source cell) 3, and comprises the lenticular body 11 that forms plate shape.Lenticular body 11 has the first and second relative surfaces on thickness direction.Lenticular body 11 is respectively arranged with concavees lens (14,15,19) and convex lens (13,16,18) at first surface and second surface.Concavees lens (14,15,19) by Fresnel Lenses (recessed linear Fresnel lens), limited a plurality of concavees lens surface (14a wherein extending along the first direction perpendicular to thickness direction, 15a, 19a) be arranged in respectively in the second direction perpendicular to thickness direction and first direction.Convex lens (13,16,18) by Fresnel Lenses (protruding linear Fresnel lens), limited, a plurality of convex lens surface (the 13a that wherein extend along the third direction intersecting perpendicular to thickness direction and with first direction, 16a, 18a) be arranged in respectively in the fourth direction perpendicular to thickness direction and third direction.
And the optical lens 1 of the present embodiment comprises the following second to the 4th feature.About Second Characteristic, in First Characteristic, first surface defines light incident surface 11b.About the 3rd feature, first or Second Characteristic in, first surface is concave surface.About the 4th feature, in any one in first to the 3rd, first surface is provided with convex lens 17 at its each place, opposite end in second direction.It is noted that second to the 4th is characterized as optionally.
The illuminating equipment A of the present embodiment comprises aforementioned optical lens 1 and is designed for the part reflection of light plate 2 to front-reflection from light source cell 3 transmittings.Reflecting plate 2 is perpendicular to forming the first Fresnel structure (14,16,19) and the second Fresnel structure (13,15,18) in the Fresnel structure of the convex lens in (13,16,18) and the direction perpendicular to the optical axis of light source (light source cell) 3, with respect to optical lens 1, laterally settle.
In other words, the illuminating equipment A of the present embodiment comprises following the 5th feature.About the 5th feature, illuminating equipment A comprises the equipment body 4 that is designed to hold light source (light source cell) 3; And be placed in light source (light source cell) 3 optical lens 1 above.Optical lens 1 comprises First Characteristic.In addition, optical lens 1 can optionally comprise the second to the 4th feature.And the illuminating equipment A of the present embodiment comprises the following the 6th and the 7th feature.About the 6th feature, in the 5th feature, illuminating equipment A also comprises and is designed to the reflecting plate 2 to front-reflection by the part light from light source (light source cell) 3 transmitting.About the 7th feature, in the 6th feature, reflecting plate 2 is placed in the side of optical lens 1 along fourth direction.It is noted that the 6th and the 7th feature is optional.
As mentioned above, according to the optical lens 1 of the present embodiment and illuminating equipment A, be formed at the first Fresnel structure (14,16 in light incident surface 11b, 19) and be formed at the second Fresnel structure (13 in light exit surface 11a, 15,18) be perpendicular to one another, and the first Fresnel structure (14,16,19) formation convex lens in and the second Fresnel structure (13,15,18) and another forms concavees lens.Therefore, from the light of light source transmitting, can be on specific direction distribute thering is wide-angle region, and can in the direction perpendicular to this specific direction, have on the region of narrow angle and distribute.And, due to each the formation Fresnel shape in light incident surface 11b and light exit surface 11a, so can attenuate lens.Therefore it is possible, reducing production costs and be convenient to form large lens.

Claims (7)

1.一种用于控制从光源发射的光的分布的光学透镜，包括形成为板形状的透镜体，1. An optical lens for controlling distribution of light emitted from a light source, comprising a lens body formed in a plate shape, 其中：in: 所述透镜体在厚度方向上具有相对的第一表面和第二表面；The lens body has opposite first and second surfaces in the thickness direction; 所述透镜体在所述第一表面和所述第二表面处分别设置有凹透镜和凸透镜；The lens body is provided with a concave lens and a convex lens at the first surface and the second surface, respectively; 所述凹透镜由以下菲涅尔透镜限定：在该菲涅尔透镜中，沿着垂直于所述厚度方向的第一方向延伸的多个凹透镜表面布置在分别垂直于所述厚度方向和所述第一方向的第二方向上；并且The concave lens is defined by a Fresnel lens in which a plurality of concave lens surfaces extending along a first direction perpendicular to the thickness direction are arranged in a direction perpendicular to the thickness direction and the second direction, respectively. in a second direction in one direction; and 所述凸透镜由以下菲涅尔透镜限定：在该菲涅尔透镜中，沿着垂直于所述厚度方向且与所述第一方向交叉的第三方向延伸的多个凸透镜表面布置在分别垂直于所述厚度方向和所述第三方向的第四方向上。The convex lens is defined by a Fresnel lens in which a plurality of convex lens surfaces extending in a third direction perpendicular to the thickness direction and intersecting the first direction are arranged respectively perpendicular to The thickness direction and the fourth direction of the third direction. 2.如权利要求1所述的光学透镜，其中2. The optical lens as claimed in claim 1, wherein 所述第一表面限定光入射表面。The first surface defines a light incident surface. 3.如权利要求1所述的光学透镜，其中3. The optical lens as claimed in claim 1, wherein 所述第一表面是凹面。The first surface is concave. 4.如权利要求1所述的光学透镜，其中4. The optical lens as claimed in claim 1, wherein 所述第一表面在所述第二方向上在其各相对端设置有凸透镜。The first surface is provided with convex lenses at respective opposite ends thereof in the second direction. 5.一种照明器材，包括：5. A lighting equipment, comprising: 器材体，设计为容纳光源；以及a body designed to accommodate a light source; and 光学透镜，安置在所述光源的前面，所述光学透镜由权利要求1限定。An optical lens arranged in front of said light source, said optical lens being defined by claim 1 . 6.如权利要求5所述的照明器材，其中6. The lighting fixture of claim 5, wherein 所述照明器材还包括设计为将从所述光源发射的光的部分向前反射的反射板。The lighting fixture also includes a reflective panel designed to reflect forward part of the light emitted from the light source. 7.如权利要求6所述的照明器材，其中7. The lighting fixture of claim 6, wherein 所述反射板沿所述第四方向安置在所述光学透镜的侧边上。The reflecting plate is arranged on the side of the optical lens along the fourth direction.
CN201310320804.5A 2012-07-27 2013-07-26 Optical lens and illumination device using the same Pending CN103574504A (en)

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