CN202647592U - Lens capable of achieving even rectangular facula - Google Patents
Lens capable of achieving even rectangular facula Download PDFInfo
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- CN202647592U CN202647592U CN 201220221881 CN201220221881U CN202647592U CN 202647592 U CN202647592 U CN 202647592U CN 201220221881 CN201220221881 CN 201220221881 CN 201220221881 U CN201220221881 U CN 201220221881U CN 202647592 U CN202647592 U CN 202647592U
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Abstract
The utility model discloses a lens capable of achieving even rectangular facula. The lens is provided with a base face. A light incidence face used for receiving light-emitting diode (LED) light is arranged at the center on the bottom face, the outer surface of the lens communicated with the base face is a light exit face which comprises a plurality of free curves utilizing different curvatures of self surface to control reflection direction of incidence light in the lens and light exit direction to enable output facula to be similar to rectangle. The lens conduct full reflection on light of the horizontal angle alpha-90 degrees (30 degrees < alpha < 45 degrees), especially the central portion horizontal angle beta-90 degrees (70 degrees < beta < 90 degrees), and then the light is subjected to refraction processing through the light outlet face. Therefore, the lens effectively reduces light intensity at the facula center and on the periphery, improves light intensity of the facula edge portion, forms even rectangular facula and can achieve better mixed light lighting effect with few light sources and few lenses.
Description
Technical field
The utility model relates to a kind of LED lens of realizing even rectangular light spot, and light source can be spot light, also can be expansion light source, particularly the COB expansion light source.
Background technology
The LED emergent light of present most of packaging technology all is circle heterogeneous or rectangular light spot, such hot spot can't satisfy the demand in the illumination application of the even rectangular light spots of needs such as road lighting, tunnel illumination, backlight, projecting apparatus, automobile headlamp certainly, therefore, LED being carried out secondary optical design is necessary.
Yet the secondary optical lens of the most of orthogonal hot spot in the industry all should be used for designing for the illumination of the far fields such as street lighting at present, in the illumination of far field, the light source area is very little with respect to irradiation distance, can be used as spot light and treat, thereby carry out the optical design of lens.Such as number of patent application 201010215196.8, name is called shown in a LED lens described in the patent documentation of " LED lens ", to be that plastic material is one-body molded make the LED lens of this utility model patent, these lens comprise body, a light out part and the light inlet recess of a light-transmitting materials, but in the illumination of near field, this lens arrangement just has been not suitable for, and in the illumination of near field, the distance of target face and light source exists
In the scope of (A is the light-emitting area of light source), light source cannot be used as spot light again and treat, and must consider the impact of its light-emitting area.Number of patent application 200680010199.X, the patent documentation that name is called " the LED wide angle emitted lens that are conducive to back-lighting " discloses a LED diversing lens for the near field illumination, these lens are used in the direct-light type LED backlight illumination application exactly, what but these lens formed is circular light spot, light mixing effect in the LED-backlit illumination is used is effective not as rectangular light spot, and effectively expanded-angle is also little, and this namely means the defective of its effective expanded-angle deficiency of having to remedy with the light source of greater number in application.
In sum, the lens of the even rectangular light spot of a one-tenth wide-angle that is applied in the near field lighting field of design are necessary very much.
The utility model content
The technical problems to be solved in the utility model is: provide that a kind of expanded-angle is large, the uniform light spots lens that are applied to the near field illumination of the good uniformity of each point illumination in the rectangular light spot.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
The even rectangular light spot lens of a kind of realization, described lens have a bottom surface, and described bottom surface central authorities are provided with a concave surface, are the plane of light incidence of lens; Lens have two or more beam projecting faces, are responsible for the light of outgoing different angles; Lens have two or more light reflection faces, are used for controlling light in the direction of lens inside; The main part of lens is by the common definition space that surrounds of bottom surface, plane of light incidence, light reflection face and the beam projecting face of lens.
Be further used as preferred embodiment, described plane of light incidence is sphere or the composite surface on free form surface or the face of cylinder or sphere and the face of cylinder or the composite surface on free form surface and the face of cylinder.
Be further used as preferred embodiment, the beam projecting face of described lens is spliced by free form surface, is responsible for the outgoing of different angles light, can control the refraction exit direction of light by regulating its curvature parameters.
Be further used as preferred embodiment, the light reflection face of described lens is spliced by free form surface, and light is in the direction of lens inside in ° scope of α ~ 90 to be responsible for the control horizontal angle, and the span of described α is 30 °＜α＜45 °.
Be further used as preferred embodiment, connecting portion is that the free form surface of continuous transition or discontinuous transition is spliced between each face of described lens.
Be further used as preferred embodiment, the using light source of described lens is spot light or expanding surface light source.
Be further used as preferred embodiment, described lens bottom is provided with positioning pins, and described positioning pins is provided with locating hole or pilot pin.
Be further used as preferred embodiment, described lens are made by PC or PMMA or PP or ABS or PVC or glass material.
Be further used as preferred embodiment, described lens are single or array format, and lens and light source corresponding relation are for one to one or one-to-many or many-to-one relationship.
The beneficial effects of the utility model are: the utility model lens have changed the design of traditional LED lens plane of light incidence, control the refractive direction of incident ray by the different curvature of different parts on plane of light incidence, have improved light extraction efficiency; Further, comprise in the first exit facet of light in the direct refractor and the refractor the second exit facet through the light of total reflection on the beam projecting face, by regulating the curvature parameters of the first exit facet and the second exit facet, can form uniform rectangular light spot, and effectively expanded-angle can reach 120 ~ 160 degree, thereby can reach better Mixed Lights Illumination effect with less light source and lens numbers.
Description of drawings
Fig. 1 is the structural representation of the utility model lens;
Fig. 2 is that the master of the utility model lens is to schematic diagram;
Fig. 3 is the side schematic view of the utility model lens;
Fig. 4 is the elevational schematic view of the utility model lens;
Fig. 5 is the distribution of light schematic diagram of the utility model lens;
Fig. 6 is the outgoing schematic diagram of the utility model lens different angles light;
Fig. 7 is the perspective view of the utility model lens;
Fig. 8 is the Illumination Distribution effect schematic diagram of lens among the utility model embodiment;
Fig. 9 is the lens arrangement schematic diagram that changes the plane of light incidence shape among the utility model embodiment;
Figure 10 is the lens arrangement schematic diagram that changes the plane of light incidence shape among another embodiment of the utility model;
Figure 11 is the lens arrangement schematic diagram that changes the utility model lens the 3rd reflector shape.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described further:
The even rectangular light spot lens of a kind of realization, these lens have a bottom surface, described bottom surface central authorities are provided with a plane of light incidence 1 that receives LED light, the outer surface of the lens that connect with the bottom surface is the beam projecting face, described plane of light incidence 1 is for utilizing curvature to regulate sphere or the free form surface of the refractive direction of different angles incident ray, makes output facula near the free form surface of rectangle thereby described beam projecting face comprises a plurality of reflection direction and the beam projecting directions of light in lens inside of utilizing its surperficial different curvature to control after the incident.
With reference to Fig. 1, in the present embodiment, plane of light incidence 1 is the sphere that is positioned at the indent of lens bottom center, the refractive direction of LED light on plane of incidence difference is different, adjust LED light by the curvature parameters at control plane of light incidence 1 difference place and injected lens inside with suitable angle, thereby increased the rising angle after LED light enters plane of light incidence 1, avoided the loss of light and the reduction of optical efficiency, be conducive to by the relevant parameter of adjusting each position of lens facula area be controlled.
Described beam projecting face comprises the first exit facet 2 for the light of horizontal angle in the refractor in 0 ° ~ α (30 °＜α＜45 °) scope, described the first exit facet 2 is connected with the second exit facet 4 by first reflecting surface 3 as the continuous transition face, described the second exit facet 4 is connected with the second reflecting surface 5 and the 3rd reflecting surface 6 of indent on the periphery top sides edge of lens, described the 3rd reflecting surface 6 is positioned at the middle position relative with plane of light incidence 1, the reflection of control lens internal water straight angle β ~ 90 ° of interior light of (70 °＜β＜90 °) scope distributes, described the second reflecting surface 5 is used for connecting the second exit facet 4 and described the 3rd reflecting surface 6, and with light reflection to the second exit facet 4 of horizontal angle α ~ β (30 °＜α＜45 °, 70 °＜β＜90 °).In application, the first exit facet 2, the second exit facet 4, the first reflecting surface 3, the second reflecting surface 5 and the 3rd reflecting surface 6 are all free form surface.Curvature parameters by controlling the first exit facet 2 so that in the lens light of level angle in 0 ° ~ α (30 °＜α＜45 °) scope reflect lens (with reference to the light 1 among Fig. 6) with suitable angle, allow it shoot to the hot spot edge of requirement, thereby the intensity of illumination at hot spot edge has been carried out effectively replenishing improving, promoted the uniformity of hot spot; By regulating the curvature parameters of the 3rd reflecting surface 6, the light of lens internal water straight angle β ~ 90 ° of (70 °＜β＜90 °) scopes is carried out total reflection, and then through the 4 refraction outgoing (with reference to the light 3 among Fig. 6) of the second exit facet, thereby make it away from spot center and position on every side, avoided occurring the too high situation of hot spot central authorities' intensity of illumination, also increase the intensity of illumination at other positions of hot spot, thereby improved the uniformity of hot spot; By finely tuning the curvature parameters of the second reflecting surface 5, the 3rd reflecting surface 6 and the second exit facet 4, the emergent ray that can send that a part of light source between light source center and the edge carries out decentralised control (with reference to the light 2 among Fig. 6), improves the uniformity in zone between hot spot edge and the spot center.
Fig. 2 is that the master of the utility model lens is to schematic diagram, Fig. 3 is the side schematic view of the utility model lens, Fig. 4 is the elevational schematic view of the utility model lens, and the perspective view of the utility model lens is with reference to Fig. 7, and Fig. 5 is the distribution of light schematic diagram of the utility model lens.The scioptics structure, to horizontal angle α ~ 90 ° (30 °＜α＜45 °) particularly the light of middle body horizontal angle beta ~ 90 ° (70 °＜β＜90 °) carry out by exiting surface it being reflected processing again after the total reflection, thereby effectively reduce spot center and intensity of illumination on every side thereof, improved the intensity of illumination of hot spot edge and other part, by regulating the curvature parameters of each position free form surface of lens, further improved the uniformity of hot spot on this basis.The Illumination Distribution effect schematic diagram of the utility model lens as shown in Figure 8, the utility model lens can be in the illumination of near field, particularly in the down straight aphototropism mode set illumination, form the regular rectangular shape hot spot that effective expanded-angle reaches 120-160 ° of high evenness high light line utilization rate.
Preferably, the utility model lens are made by light transmissive materials such as PC, PMMA, PP, ABS, PVC or glass.With reference to Fig. 1, the lens bottom is provided with positioning pins 7, and positioning pins 7 is provided with locating hole 8 and pilot pin 9.By regulating the height of positioning pins 7, just can control the distance between light source luminescent face and the lens bottom surface, and then area and the uniformity thereof of control hot spot.
In a preferred embodiment, the shape of the plane of light incidence 1 of the utility model lens can change, for example adopt the cylindrical of flat-top shown in Figure 9, perhaps adopt the cylindrical of dome shown in Figure 10 or other that controlled shape of refractive direction that incident ray enters lens all can.With reference to Figure 11, the shape of the minimum point of the 3rd reflecting surface 6 by changing lens or the second reflecting surface 5 and the 3rd reflecting surface 6 merged into the exit direction that a reflecting surface is controlled light, namely adopt light that two light reflection faces can also realize the position, lens centre away from spot center and position on every side, avoided occurring the too high situation of hot spot central authorities' intensity of illumination, also increase the intensity of illumination at other positions of hot spot, thereby improved the uniformity of hot spot.In addition, also 3 cancellations of the first reflecting surface directly the parameter that connects rear adjusting lens region of interest can be passed through mutually by the second exit facet 4 and the first exit facet 2, also same effect can be reached.
In concrete the application, the utility model lens are single or array format, and lens and light source corresponding relation are for one to one or one-to-many or many-to-one relationship.
More than be that better enforcement of the present utility model is specified, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art can also make all equivalent variations or replacement under the prerequisite of the utility model spirit, the distortion that these are equal to or replacement all are included in the application's claim limited range.
Claims (9)
1. realize even rectangular light spot lens for one kind, it is characterized in that: described lens have a bottom surface, and described bottom surface central authorities are provided with a concave surface, are the plane of light incidence of lens; Lens have two or more beam projecting faces, are responsible for the light of outgoing different angles; Lens have two or more light reflection faces, are used for controlling light in the direction of lens inside; The main part of lens is by the common space that surrounds of the bottom surface of lens, plane of light incidence, light reflection face and beam projecting face.
2. even rectangular light spot lens of a kind of realization according to claim 1, it is characterized in that: described plane of light incidence is sphere or the composite surface on free form surface or the face of cylinder or sphere and the face of cylinder or the composite surface on free form surface and the face of cylinder.
3. even rectangular light spot lens of a kind of realization according to claim 1, it is characterized in that: the beam projecting face of described lens is spliced by free form surface, be responsible for the outgoing of different angles light, can control the refraction exit direction of light by regulating its curvature parameters.
4. even rectangular light spot lens of a kind of realization according to claim 1, it is characterized in that: the light reflection face of described lens is spliced by free form surface, light is in the direction of lens inside in ° scope of α ~ 90 to be responsible for the control horizontal angle, and the span of described α is 30 °＜α＜45 °.
5. even rectangular light spot lens of a kind of realization according to claim 1 is characterized in that: connecting portion is that the free form surface of continuous transition or discontinuous transition is spliced between each face of described lens.
6. even rectangular light spot lens of a kind of realization according to claim 1, it is characterized in that: the using light source of described lens is spot light or expanding surface light source.
7. even rectangular light spot lens of a kind of realization according to claim 1 is characterized in that: described lens bottom is provided with positioning pins, and described positioning pins is provided with locating hole or pilot pin.
8. even rectangular light spot lens of a kind of realization according to claim 1 is characterized in that: described lens are made by PC or PMMA or PP or ABS or PVC or glass material.
9. even rectangular light spot lens of a kind of realization according to claim 1, it is characterized in that: described lens are single or array format, lens and light source corresponding relation are for one to one or one-to-many or many-to-one relationship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220221881 CN202647592U (en) | 2012-05-16 | 2012-05-16 | Lens capable of achieving even rectangular facula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220221881 CN202647592U (en) | 2012-05-16 | 2012-05-16 | Lens capable of achieving even rectangular facula |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202647592U true CN202647592U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220221881 Expired - Fee Related CN202647592U (en) | 2012-05-16 | 2012-05-16 | Lens capable of achieving even rectangular facula |
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| CN (1) | CN202647592U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705776A (en) * | 2012-05-16 | 2012-10-03 | 广州市鸿利光电股份有限公司 | Lens realizing even and rectangular facula |
| CN104075235A (en) * | 2013-03-28 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | All-round lens |
-
2012
- 2012-05-16 CN CN 201220221881 patent/CN202647592U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705776A (en) * | 2012-05-16 | 2012-10-03 | 广州市鸿利光电股份有限公司 | Lens realizing even and rectangular facula |
| CN104075235A (en) * | 2013-03-28 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | All-round lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 510890 Huadu District, Guangdong, Guangzhou Flower Town, SAST Road, No. 1, No. 1 Patentee after: Hongli Newell group Limited by Share Ltd Address before: 510800 Dongfeng Road West, automobile city, Huadu District, Guangdong, Guangzhou Patentee before: Guangzhou Hongli Tronic Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20190516 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |