CN203336468U - Lens for lighting device and lighting device with lens - Google Patents
Lens for lighting device and lighting device with lens Download PDFInfo
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- CN203336468U CN203336468U CN2013202145082U CN201320214508U CN203336468U CN 203336468 U CN203336468 U CN 203336468U CN 2013202145082 U CN2013202145082 U CN 2013202145082U CN 201320214508 U CN201320214508 U CN 201320214508U CN 203336468 U CN203336468 U CN 203336468U
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- lens
- exit facet
- lighting device
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Abstract
The utility model relates to a lens (100) for a lighting device. The lens (100) comprises a bottom face (1) and an emitting plane (2) protruded on the bottom face (1). A concave area (3) is defined arranged in the center of the bottom face (1), and an incident plane (4) is formed on the surface of the concave area (3). A light source (5) of the lighting device is arranged in the concave area (3). The emitting plane (2) comprises multiple mutually adjacent auxiliary emitting planes (21) which commonly define a wave-shaped surface structure in a rotation direction around an optical axis (X) of the light source (5). In addition, the utility model further relates to the lighting device (200) with the lens (100).
Description
Technical field
The utility model relates to a kind of lens for lighting device.In addition, the utility model also relates to a kind of lighting device with lens of the above-mentioned type.
Background technology
The LED lighting engineering has unique advantage, and its luminous efficiency is high, energy-conservation, environmental protection, and its life-span is longer.Therefore, increasing lighting device adopts LED chip as light source.LED chip is a kind of point-like cold light source, in order to obtain good light distribution performance, usually needs to use additional lens to carry out the secondary optics processing to the light of its outgoing.But, the physical arrangement of LED chip has determined the profile that the exiting surface of the light source of this type is rectangle, is generally rectangle or square, therefore, the light of its outgoing tends to form the hot spot corresponding with the shape of its exiting surface, for example rectangle or foursquare hot spot.In the situation that adopt traditional lens, the shape of carrying out the hot spot of secondary optics processing through such lens is not regular circle, and this has affected the optical effect of light of the outgoing of lighting device to a great extent.
The utility model content
For solving the problems of the technologies described above, the utility model proposes a kind of lens for lighting device, the light of the light source outgoing of this lens illumination apparatus carries out the secondary optics processing, thereby obtains basically circular uniform light spots.In addition, the utility model also relates to a kind of lighting device with lens of the above-mentioned type.
First purpose of the present utility model realizes thus by a kind of lens for lighting device, these lens comprise the exit facet swelled on He bottom surface, bottom surface, the central authorities of bottom surface limit recessed region, the surface of recessed region forms the plane of incidence, the light source of lighting device is arranged in recessed region, and wherein, exit facet comprises a plurality of sub-exit facets adjacent one another are, wherein, sub-exit facet jointly limits wavy surface texture on the direction of rotation of the optical axis around light source.In design of the present utility model, by cooperatively interacting of exit facet and the plane of incidence, make from the light of the light source outgoing of lighting device and be adjusted to outgoing on predetermined direction from the exit facet outgoing, thereby make the circular light spot of lighting device generation rule.
According to preferred design of the present utility model, propose, outgoing after reflect by plane of incidence incident and by exit facet from the light of light source, wherein, the light formation after the exit facet outgoing is with respect to the rotational symmetric hot spot of optical axis.Because the profile of the light emitting surface of the light source of lighting device may be rectangle, therefore define the elementary contour of the rectangle of the hot spot that light source forms at the light of edge's outgoing of the light emitting surface of rectangle, and after cooperatively interacting between the exit facet of lens and the plane of incidence, make the light by this edge's outgoing drop in the scope of regular circular light spot afterwards through the lens adjustment, that is to say, this part light defines the circular contour of rule of the hot spot of formation.
Preferably, sub-exit facet bends to cambered surface on the direction away from recessed region, and wherein, the zone between adjacent cambered surface forms the groove recessed towards recessed region.The exit facet jointly consisted of a plurality of sub-exit facets has formed the profile on the surface that is similar to pumpkin, thereby makes the light from the plane of incidence to form circular light spot on object to be illuminated.
Further preferably, groove is gathered together in the intersection of optical axis and exit facet, and starts to extend to radially bottom surface from intersection.The such groove existed between adjacent sub-exit facet makes the light from the plane of incidence pass through sub-exit facet, especially the shooting angle after the regional outgoing of groove changes, thereby makes this emergent ray can drop in the scope of predetermined circular light spot.
According to the utility model, further propose, the intersecting lens of exit facet and bottom surface is wavy line, and the projection-type of every sub-exit facet on the plane of bottom surface restriction is like fan-shaped.At this, similar fan-shaped being construed as, the intersecting lens of two adjacent sub-exit facets forms fan-shaped limit, however the radius of the circular arc that the line between two limits forms but is less than the length of side on this fan-shaped limit.
Preferably, the line at the crest place of wavy line forms circular, on the plane that the plane of incidence limits in bottom surface, is projected as circle.The profile of the light emitting surface of the light source adopted in some lighting devices may be foursquare, therefore, that the profile design in being parallel to the cross section of bottom surface of exit facet and the plane of incidence is conglobate, can make lighting device produce uniform circular light spot.
Further preferably, sub-exit facet has respectively the curve that extends to crest from intersection, and wherein, this curve is determined by following formula in the X-Y coordinate system:
Y=0.0004X
5+0.0056X
4+0.037X
3+0.0883X
2+0.0566X+5.12。
In this embodiment, each sub-exit facet has identical profile, so each sub-exit facet extends to crest curve from intersection is all identical.
Optionally, the line at the crest place of wavy line forms oval, on the plane that the plane of incidence limits in bottom surface, is projected as circle or ellipse.The profile of the light emitting surface of the light source adopted in some other lighting devices may be rectangular, therefore, in being parallel to the cross section of bottom surface, by the profile design ovalisation of exit facet, and, by the profile design ovalisation of the plane of incidence or circular, can make lighting device produce uniform circular light spot.
Further preferably, sub-exit facet has respectively the curve that extends to crest from intersection, wherein, this curve comprises the first curve of the cross section intercepting consisted of oval-shaped semi-minor axis and optical axis, and this first curve is determined by following formula in the X-Y coordinate system:
Y=0.0004X
5+0.0056X
4+0.037X
3+0.0883X
2+0.0566X+5.12。
In addition, this curve also has the second curve of the cross section intercepting consisted of oval-shaped major semiaxis and optical axis, and the curve of each the sub-exit facet in 90 zones of spending of major semiaxis and semi-minor axis restriction is different.In the present embodiment, the crest place of the wavy intersecting lens of exit facet and bottom surface has connected into ellipse, such lens are to take exit facet to be connected conglobate lens with the crest place of the wavy intersecting lens of bottom surface and to carry out the stretcher strain acquisition as basis, namely integrally stretching lens on two rightabouts of the diameter perpendicular to bottom surface, make this diameter be elongated as oval-shaped major axis.In the case, the curve of the cross section intercepting only limited with optical axis by oval-shaped semi-minor axis is consistent with each curve in circular scheme, and can obtain according to above-mentioned formula.In present design, lens can be divided into four zones by oval-shaped major axis and minor axis, and wherein, the corresponding curve of each the sub-exit facet in a zone is all different each other.
Advantageously, the quantity of sub-exit facet is between 20 to 60.The quantity of too much or very few sub-exit facet all can produce harmful effect to light spot profile and the light distribution performance formed.According to practical situations, determine, the quantity of sub-exit facet is proper between 20 to 60.
Optionally, fan-shaped central angle is between 18 ° to 6 °.Can adjust equally light spot profile and the light distribution performance of formation by the fan-shaped central angle of adjusting each sub-exit facet projection in the plane.
According to the utility model proposes, exit facet also comprises the zone line of concave surface bended and the fringe region of convex bending, and zone line and fringe region seamlessly transit.This further makes lighting device obtain uniform light distribution performance.
Preferably, recessed region is designed to similar conical.
Another purpose of the present utility model is by a kind of lighting device realization, and this lighting device comprises the lens of light source and the above-mentioned type.Can produce uniform circular light spot according to lighting device of the present utility model.
Preferably, light source is LED chip.LED chip has advantages of that the life-span is long, luminous efficiency is high, environmental protection.
According to a design of the present utility model, propose, LED chip has rectangular profile.In this case, use such lens, the line at each crest place of the wavy line intersected of the exit facet of these lens and bottom surface forms oval, wherein, the long limit of LED chip is parallel to oval-shaped long axis, and optical axis is through the symmetrical centre of LED chip.
It should be understood that if do not have other dated especially, the feature of different exemplary embodiment described herein can be bonded to each other.
The accompanying drawing explanation
Accompanying drawing forms the part of this specification, for helping further to understand the utility model.These accompanying drawings illustrate embodiment of the present utility model, and are used for illustrating principle of the present utility model together with specification.Identical parts mean with identical label in the accompanying drawings.Shown in figure:
Fig. 1 is the side view according to lens of the present utility model;
Fig. 2 is the perspective view according to lens of the present utility model;
Fig. 3 is the top view according to the first embodiment of lens of the present utility model;
Fig. 4 is the top view according to the second embodiment of lens of the present utility model;
Fig. 5 is the surface of intensity distribution according to the hot spot of lighting device generation of the present utility model.
The specific embodiment
Fig. 1 shows the side view according to lens 100 of the present utility model.As seen from the figure, the exit facet 2 that lens 100 comprise bottom surface 1 and swell on bottom surface 1, the central authorities of this bottom surface 1 limit recessed region 3, and preferably, recessed region 3 is designed to similar conical.Certainly, this recessed region 3 also can be designed to other trend in cross section, is for example SPL.In addition, the surface of recessed region 3 forms the plane of incidence 4, and the light source 5 of lighting device is arranged in recessed region 3, and this light source 5 is designed to LED chip.Wherein, exit facet 2 comprises a plurality of sub-exit facets 21 adjacent one another are, and wherein, sub-exit facet 21 limits wavy surface texture jointly at the optical axis X around light source 5.In design of the present utility model, by cooperatively interacting of exit facet 2 and the plane of incidence 4, make from the light of light source 5 outgoing of lighting device and be adjusted to outgoing on predetermined direction from exit facet 2 outgoing, thereby make the circular light spot of lighting device generation rule.
Fig. 2 shows the perspective view according to lens 100 of the present utility model.As seen from the figure, sub-exit facet 21 bends to cambered surface on the direction away from recessed region 3, wherein, forms the groove 22 recessed towards recessed region 3 between adjacent cambered surface.The exit facet 2 jointly consisted of a plurality of sub-exit facets 21 has formed the profile on the surface that is similar to pumpkin, thereby makes the light from the plane of incidence 4 to form circular light spot on object to be illuminated.In addition, groove 22 is gathered together at the intersection T of optical axis X and exit facet 2, and starts to extend to radially bottom surface 1 from intersection T.The such groove 22 existed between adjacent sub-exit facet 21 makes the light from the plane of incidence 4 pass through sub-exit facet 21, especially the shooting angle after the regional outgoing of groove 22 changes, thereby makes this emergent ray can drop in the scope of predetermined circular light spot.
In addition, further visible in Fig. 2, exit facet 2 is wavy line with the intersecting lens of bottom surface 1, and the projection-type of every sub-exit facet 21 on the plane of bottom surface restriction is similar to fan-shaped (referring to Fig. 3 and Fig. 4).Because sub-exit facet 21 is wavy on the direction of rotation of optical axis, therefore, every sub-exit facet 21 must be also wavy with the intersecting lens of bottom surface 1.According to preferred design of the present utility model, propose, the quantity of sub-exit facet 21 is between 20 to 60.The quantity of too much or very few sub-exit facet 21 all can produce harmful effect to light spot profile and the light distribution performance formed.According to actual applicable cases, determine, the quantity of sub-exit facet 21 is proper between 20 to 60.Yet, for clarity, be not illustrated in the embodiment show in figure 3 the sub-exit facet 21 in above-mentioned number range.
Optionally, also can determine by the fan-shaped central angle that limits each sub-exit facet 21 projection in the plane the quantity of sub-exit facet 21.It is also preferred that, fan-shaped central angle is between 18 ° to 6 °.
Fig. 3 shows the top view of the first embodiment of lens 100 of the present utility model.As seen from the figure, exit facet 2 is wavy line with the intersecting lens of bottom surface 1.In the present embodiment, the line of the P of crest place of wavy line forms circular, on the plane that the plane of incidence 4 limits in bottom surface 1, is projected as circle.The lens 100 that illustrate in the present embodiment are particularly suitable for adopting the lighting device of the light source 5 with foursquare light emitting surface.These lens 100 can be simply carry out the secondary optics processing to the light of these light source 5 outgoing, thereby obtain uniform circular light spot.
In the present embodiment, sub-exit facet 21 has respectively the curve C that extends to crest P from intersection T, and wherein, this curve C is determined by following formula in the X-Y coordinate system:
Y=0.0004X
5+0.0056X
4+0.037X
3+0.0883X
2+0.0566X+5.12。In this embodiment, each sub-exit facet 21 has identical profile, so the corresponding curve of each sub-exit facet 21 is all identical.
Fig. 4 shows the top view according to the second embodiment of lens 100 of the present utility model.Lens 100 in this second embodiment are identical with the basic structure of lens 100 in the first embodiment, its difference only is following, being sub-exit facet 21 forms ovally with the line of the P of crest place of the wavy intersecting lens of bottom surface 1, on the plane that the plane of incidence 4 limits in bottom surface 1, is projected as ellipse or circle (in the present embodiment for circular).The light emitting surface that is particularly suitable for being applied in the light source of employing according to the lens 100 of this embodiment is in rectangular lighting device.
In the present embodiment, sub-exit facet 21 has respectively the curve C that extends to crest P separately from intersection T, wherein, this curve C comprises the first curve C 1 of the cross section intercepting consisted of oval-shaped semi-minor axis and optical axis X, wherein, this first curve C 1 is determined by following formula in the X-Y coordinate system:
Y=0.0004X
5+0.0056X
4+0.037X
3+0.0883X
2+0.0566X+5.12。In addition, this curve C also has the second curve C 2 of the cross section intercepting consisted of oval-shaped major semiaxis and optical axis X, and wherein, the curve of each the sub-exit facet 21 in 90 zones of spending of major semiaxis and semi-minor axis restriction is different.In the present embodiment, exit facet 2 has connected into ellipse with the P of crest place of the wavy intersecting lens of bottom surface 1, such lens 100 are to take exit facet 2 to be connected conglobate lens 100 with the P of crest place of the wavy intersecting lens of bottom surface 1 and to carry out the stretcher strain acquisition as basis, namely integrally stretching lens on two rightabouts of the diameter perpendicular to bottom surface 1, make this diameter be elongated as oval-shaped major axis.In the case, the curve of the cross section intercepting only limited with optical axis by oval-shaped semi-minor axis is consistent with each curve in circular scheme, and can obtain according to above-mentioned formula.In present design, lens 100 can be divided into four zones by oval-shaped major axis and minor axis, and wherein, the corresponding curve of each the sub-exit facet 21 in a zone is all different each other.
In addition, visible in Fig. 4, the cross section limited by oval-shaped semi-minor axis and optical axis X is the P of crest place with the intersecting lens of bottom surface 1 through a sub-exit facet 21, and the P of crest place of the intersecting lens of other sub-exit facet 21 and bottom surface 1 is passed through in the cross section limited by oval-shaped major semiaxis and optical axis X.
From Fig. 4, can clearly see, the light source that is designed to LED chip 55 of lighting device has rectangular profile.In this case, in order to make the light that exiting surface is rectangular LED chip 5 outgoing still can obtain desirable circular light spot after lens 100 outgoing, the long limit of LED chip 5 should be parallel to oval-shaped long axis, and optical axis X is through the symmetrical centre of LED chip 5.
These are only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All any modifications of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model and principle.
Reference number
1 bottom surface
2 exit facets
21 sub-exit facets
22 grooves
The 2a zone line
The 2b fringe region
3 recessed regions
4 planes of incidence
5 light sources, LED chip
100 lens
The X optical axis
The T intersection
P crest place
The C curve
C1 the first curve
C2 the second curve
Claims (20)
1. lens for lighting device (100), described lens (100) comprise bottom surface (1) and the exit facet (2) above swelled in described bottom surface (1), the central authorities of described bottom surface (1) limit recessed region (3), the surface of described recessed region (3) forms the plane of incidence (4), the light source of described lighting device (5) is arranged in described recessed region (3), it is characterized in that, described exit facet (2) comprises a plurality of sub-exit facets (21) adjacent one another are, wherein, described sub-exit facet (21) limits wavy surface texture jointly at the optical axis around described light source (5) (X).
2. lens according to claim 1 (100), it is characterized in that, light from described light source (5) reflects rear outgoing by the described plane of incidence (4) incident and by described exit facet (2), wherein, the light after described exit facet (2) outgoing forms with respect to the rotational symmetric hot spot of described optical axis (X).
3. lens according to claim 1 (100), it is characterized in that, described sub-exit facet (21) bends to cambered surface on the direction away from described recessed region (3), wherein, form the groove (22) recessed towards described recessed region (3) in the zone between adjacent described cambered surface.
4. lens according to claim 3 (100), it is characterized in that, described groove (22) is gathered together in described exit facet (2) and the intersection (T) of described optical axis (X), and starts to extend to radially described bottom surface (1) from described intersection (T).
5. lens according to claim 4 (100), is characterized in that, described exit facet (2) is wavy line with the intersecting lens of described bottom surface (1).
6. lens according to claim 5 (100), is characterized in that, the projection-type on the plane that each described sub-exit facet (21) limits in described bottom surface (1) is like fan-shaped.
7. lens according to claim 6 (100), is characterized in that, the line at the crest place (P) of described wavy line forms circular.
8. lens according to claim 6 (100), is characterized in that, on the plane that the described plane of incidence (4) limits in described bottom surface (1), is projected as circle.
9. lens according to claim 7 (100), it is characterized in that, described sub-exit facet (21) has respectively the curve (C) that extends to described crest (P) from described intersection (T), and wherein, described curve (C) is determined by following formula in the X-Y coordinate system:
Y=0.0004X
5+0.0056X
4+0.037X
3+0.0883X
2+0.0566X+5.12。
10. lens according to claim 6 (100), is characterized in that, the line at the crest place (P) of described wavy line forms oval.
11. lens according to claim 10 (100), is characterized in that, on the plane that the described plane of incidence (4) limits in described bottom surface (1), is projected as circle or ellipse.
12. lens according to claim 10 (100), it is characterized in that, described sub-exit facet (21) has respectively the curve (C) that extends to described crest (P) separately from described intersection (T), wherein, described curve (C) comprises first curve (C1) of the cross section intercepting consisted of described oval-shaped semi-minor axis and described optical axis (X), wherein, described the first curve (C1) is determined by following formula in the X-Y coordinate system:
Y=0.0004X
5+0.0056X
4+0.037X
3+0.0883X
2+0.0566X+5.12。
13. lens according to claim 12 (100), it is characterized in that, described curve (C) also has second curve (C2) of the cross section intercepting limited by described oval-shaped major semiaxis and described optical axis (X), and the curve of each the described sub-exit facet (21) in 90 zones of spending of described major semiaxis and the restriction of described semi-minor axis is different.
14. according to the described lens of any one in claim 1 to 13 (100), it is characterized in that, the quantity of described sub-exit facet (21) is between 20 to 60.
15. lens according to claim 6 (100), is characterized in that, described fan-shaped central angle is between 18 ° to 6 °.
16. according to the described lens of any one in claim 1 to 13 (100), it is characterized in that, described recessed region (3) is designed to similar conical.
17. a lighting device, comprise light source (5), it is characterized in that, described lighting device (200) also comprises according to the described lens of any one in claim 1 to 16 (100).
18. lighting device according to claim 17, is characterized in that, described light source (5) is LED chip (5).
19. lighting device according to claim 18, is characterized in that, described LED chip (5) has rectangular profile.
20. lighting device according to claim 19, it is characterized in that, the line at each crest place (P) of the wavy line that intersect the exit facet (2) of described lens (100) and bottom surface (1) forms oval, wherein, the long limit of described LED chip (5) is parallel to described oval-shaped long axis, and described optical axis (X) is through the symmetrical centre of described LED chip (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202145082U CN203336468U (en) | 2013-04-24 | 2013-04-24 | Lens for lighting device and lighting device with lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202145082U CN203336468U (en) | 2013-04-24 | 2013-04-24 | Lens for lighting device and lighting device with lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203336468U true CN203336468U (en) | 2013-12-11 |
Family
ID=49705142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202145082U Expired - Fee Related CN203336468U (en) | 2013-04-24 | 2013-04-24 | Lens for lighting device and lighting device with lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203336468U (en) |
-
2013
- 2013-04-24 CN CN2013202145082U patent/CN203336468U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20180424 |