CN102788313B - Floodlight lens and lamp - Google Patents
Floodlight lens and lamp Download PDFInfo
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- CN102788313B CN102788313B CN201110129311.4A CN201110129311A CN102788313B CN 102788313 B CN102788313 B CN 102788313B CN 201110129311 A CN201110129311 A CN 201110129311A CN 102788313 B CN102788313 B CN 102788313B
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- lens
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- plane
- exit facet
- line segment
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Abstract
The invention relates to a floodlight lens and a lamp. A floodlight lens comprises a frustum cone type transparent body with a lens axis serving as a symmetry axis, the transparent body comprises an incident surface with a small diameter, an exit surface with a large diameter and a side surface which connects the incident surface with the exit surface, the middle of the incident surface is recessed inwards to form an accommodating cavity which is used for accommodating an illuminant, the middle of the exit surface is recessed inwards to form a recessed spherical surface, the side surface is a fully reflecting surface, a generatrix of the frustum cone type transparent body is a fold line which is formed by the sequential connection of a plurality of line segments, and the angle formed by each of the line segments and the lens axis is from 3.5 degrees to 43.5 degrees. The floodlight lens comprises the incident surface, the exit surface and the side surface which connects the incident surface with the exit surface, an exit angle of light of the floodlight lens is kept around 60 degrees by means of unique designs of the three surfaces, the uniformity ratio of illuminance is good, and the usage ratio of luminous efficacy is improved.
Description
[technical field]
The present invention relates to lens technologies field, relate in particular to the flood lens of a kind of LED of being applicable to.
[background technology]
Existing to LED (Light Emitting Diode, light emitting diode) floodlight mode generally adopts reflector luminous intensity distribution, but this mode is not very desirable to the processing of light type, especially larger along the light intensity of LED optical axis direction, but can not pass through reflector luminous intensity distribution, therefore the floodlight that reflector is allotted, always there will be the light intensity of mid portion higher.
Also have in the industry and adopt concavees lens to carry out optically focused to LED, but this mode is lower to the utilization rate of LED luminous flux, shows that the light that LED light emitting anger is larger cannot be utilized, and finally causes the light efficiency utilization rate of light fixture too low.
Also having a class flood lens, is on the basis of LED optically focused total reflection lens, at its exit facet, makes the effect that densely covered netted small salient point (or shrinkage pool) structure realizes floodlight, also has and adopts exit facet frosted to process.Yet the floodlight effect that these processing modes reach is all even not, and floodlight angle is generally less, more seriously too low to the utilization rate of light.
[summary of the invention]
Based on this, be necessary to provide a kind of light fixture that there is the flood lens of high light utilization efficiency and use this flood lens.
, comprise and take the circular platform type transparent bodies that lens axis is symmetry axis.Described transparent bodies comprises the exit facet that the plane of incidence that diameter is less is larger with diameter and is connected the side of the described plane of incidence and described exit facet.The middle part of the described plane of incidence caves inward and forms an accommodating cavity for accommodating light source.The middle part of the described exit facet formation concave spherical surface that caves inward.If the radius of described concave spherical surface is R, R=L/[1+ (γ-1)/(n-1)].The summit that wherein L is described concave spherical surface is to the distance of the described plane of incidence, the refractive index that n is transparent bodies, 1.3≤γ≤1.5.Described side is fully reflecting surface.The bus of the described truncated cone-shaped transparent bodies broken line that many line segments are in turn connected to form of serving as reasons, every line segment and described lens axis angulation are 3.5 ° to 43.5 °.The maximum gauge a of described exit facet and the described plane of incidence meet 1.45≤a/h≤1.85 to the ratio between the distance h of described exit facet.
In a preferred embodiment, 3.1mm≤R≤4.1mm.
In a preferred embodiment, two of every line segment end points equate with the formed angle of line at the center of the described plane of incidence.
In a preferred embodiment, described angle is 9.5 ° to 10.5 °.
In a preferred embodiment, described broken line is in turn connected to form by five line segments;
Article one, line segment and described lens axis angulation are 43.5 °;
Second line segment and described lens axis angulation are 33.5 °;
Article three, line segment and described lens axis angulation are 23.5 °;
Article four, line segment and described lens axis angulation are 13.5 °;
Article five, line segment and described lens axis angulation are 3.5 °.
In a preferred embodiment, 8mm≤h≤9mm.
In a preferred embodiment, described accommodating cavity is cylindrical.
In a preferred embodiment, the material of described transparent bodies is Merlon or polymethyl methacrylate.
, comprise LED light source and flood lens.Described flood lens comprises take the circular platform type transparent bodies that lens axis is symmetry axis.Described transparent bodies comprises the exit facet that the plane of incidence that diameter is less is larger with diameter and is connected the side of the described plane of incidence and described exit facet.Described plane of incidence middle part caves inward and forms an accommodating cavity for accommodating described LED light source.Formation concave spherical surface caves inward in the middle part of described exit facet.Described side is fully reflecting surface.The bus of the described truncated cone-shaped transparent bodies broken line that many line segments are in turn connected to form of serving as reasons, every line segment and described lens axis angulation are 3.5 ° to 43.5 °.The maximum gauge a of described exit facet and the described plane of incidence meet 1.45≤a/h≤1.85 to the ratio between the distance h of described exit facet.
In a preferred embodiment, the beam projecting angle of described LED light source after described flood lens is 59.5 ° to 60.5 °.
Above-mentioned flood lens comprises the plane of incidence, exit facet and connects the side of the plane of incidence and exit facet, by the unique design of these three faces, make to remain on 60 ° of left and right through the beam projecting angle of described flood lens, uniformity of illuminance is better simultaneously, has improved light efficiency utilization rate.
[accompanying drawing explanation]
By the more specifically explanation of the preferred embodiments of the present invention shown in accompanying drawing, above-mentioned and other object of the present invention, Characteristics and advantages will be more clear.In whole accompanying drawings, identical Reference numeral is indicated identical part.Deliberately by actual size equal proportion convergent-divergent, do not draw accompanying drawing, focus on illustrating purport of the present invention.
Fig. 1 is the three-dimensional assembly diagram of the light fixture of an embodiment, and this light fixture comprises the flood lens of LED light source and an embodiment;
Fig. 2 is the cutaway view along II-II line in Fig. 1;
Fig. 3 is the side view of light fixture shown in Fig. 1;
Fig. 4 is the fundamental diagram of light fixture shown in Fig. 1;
Fig. 5 is the emergent ray distribution curve flux schematic diagram of light fixture shown in Fig. 1.
[specific embodiment]
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.A lot of details have been set forth in the following description so that fully understand the present invention.But the present invention can implement to be much different from alternate manner described here, and those skilled in the art can do similar improvement without prejudice to intension of the present invention in the situation that, so the present invention is not subject to the restriction of following public concrete enforcement.
Refer to Fig. 1, the light fixture 300 of an embodiment comprises flood lens 100 and is located at the LED light source 200 of flood lens 100 1 sides.
Refer to Fig. 2, the effect of flood lens 100 is that the light for LED light source 200 is sent is extensive.Flood lens 100 comprises the transparent bodies 10 that is roughly truncated cone-shaped.Transparent bodies 10 is to take the rotary body that lens axis 11 is rotation axes of symmetry.The material of transparent bodies 10 can be optical glass or optical plastic, and for the ease of moulding, the material of transparent bodies 10 is preferably Merlon (PC) or polymethyl methacrylate (PMMA).
The middle part of the plane of incidence 12 caves inward and forms an accommodating cavity 121.The shape of accommodating cavity 121 is preferably cylindrical, certainly, can be also spherical or other shape.LED light source 200 is placed in accommodating cavity 121.The diameter of accommodating cavity 121 is d, and the size of diameter d is selected according to the concrete size of LED light source 200, is preferably 5mm.The degree of depth of accommodating cavity 121 is preferably 1mm.In the present embodiment, LED light source 200 is the LED chip of light emitting anger (half light intensity angle) between 110～130 °.LED light source 200 is placed on LED accommodating cavity 121 when interior, and the optical axis of LED light source 200 overlaps with lens axis 11, and LED chip aligns with the plane of incidence 12.The outside dimension of LED light source 200 should be chosen smaller, is preferably not more than 5mm.The diameter D of the plane of incidence 12 is preferably 8mm.
The diameter a of exit facet 13 is preferably 14mm.The middle part of exit facet 13 caves inward and forms a concave spherical surface 131.If the radius of concave spherical surface is R, R meets:
R＝L/[1+(γ-1)/(n-1)]
Wherein L is that the summit of concave spherical surface 131 is to the distance of the plane of incidence 12; N is the refractive index of transparent bodies, and n preferably 1.59; γ is correction factor, 1.3≤γ≤1.5.3.1mm≤R≤4.1m, preferred, R is 3.6mm.
See also Fig. 3, side 14 is fully reflecting surface.For further improving the utilization rate of light, can also take in side 14 plated surface last layer to increase anti-film.Side 14 is rotated to form by the bus 15 of truncated cone-shaped transparent bodies.Bus 15 broken line that many line segments are in turn connected to form of serving as reasons, every line segment and described lens axis angulation are 3.5 ° to 43.5 °.
In the present embodiment, bus 15 is preferably in turn connected to form by five line segments 151,152,153,154 and 155.Two end points of every line segment equate with the formed angle of line of the center O of the plane of incidence 12.In the present embodiment, this angle is 10 °.Certainly this angle also can be other suitable number of degrees, for example, be 9.5 ° to 10.5 °.
Article one, the starting point of line segment 151 position that the center O length of the distance plane of incidence 12 is D/2 in Y-axis.Article one, the angle that the terminal of line segment 151 and the line of center O and Y-axis form is 10 °.Article one, line segment 151 is 43.5 ° with lens axis (X-axis on Fig. 3) angulation.In the present embodiment, D equals 8mm.
The starting point of second line segment 152 is the terminal of article one line segment 151.The angle that the terminal of second line segment 152 and the line of center O and the terminal of article one line segment 151 and the line of center O form is 10 °.Second line segment 152 is 33.5 ° with lens axis angulation.
Article three, the starting point of line segment 153 is the terminal of second line segment 152.Article three, the angle that the terminal of line segment 153 and the line of center O and the terminal of second line segment 152 and the line of center O form is 10 °.Article three, line segment 153 is 23.5 ° with described lens axis angulation.
Article four, the starting point of line segment 154 is the terminal of the 3rd line segment 153.Article four, the angle that the terminal of line segment 154 and the line of center O and the 3rd terminal of line segment 153 and the line of center O form is 10 °.Article four, line segment 154 is 13.5 ° with lens axis angulation.
Article five, the starting point of line segment 155 is the terminal of the 4th line segment 154.Article five, the angle that the terminal of line segment 155 and the line of center O and the 4th terminal of line segment 154 and the line of center O form is 10 °.Article five, line segment 155 is 3.5 ° with lens axis angulation.
Refer to Fig. 4, when LED light source 200 is assemblied in accommodating cavity 121, the wide part that LED light source 200 sends is incident in diapire and the sidewall of accommodating cavity 121.What then, LED light source 200 sent will spread to the direction that departs from optical axis under the refraction action of the concave spherical surface at exit facet 13 131 by ectocentral smooth L1.The light L2 of the offset from center a little that LED light source 200 sends can directly reflect at exit facet 13, thereby to the direction diffusion that departs from optical axis.And will there is total reflection in 14 places in side in the light L3 that incides side 14 that LED light source 200 sends, thereby from exit facet 13 outgoing, and be interleaved mode outgoing to the direction near optical axis.
Refer to Fig. 5, be depicted as light fixture 300 and adopt the distribution curve flux that in above-described embodiment, preferred value obtains.As shown in Figure 5, the beam projecting angle of LED light source 200 after flood lens 100 is 59.5 ° to 60.5 °, and realizes floodlighting in this region, has higher uniformity of illuminance, improved light efficiency utilization rate., meeting under the prerequisite of optics requirement, flood lens 100 also has advantages of small volume meanwhile.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a flood lens, comprise and take the circular platform type transparent bodies that lens axis is symmetry axis, described transparent bodies comprises the exit facet that the plane of incidence that diameter is less is larger with diameter and is connected the side of the described plane of incidence and described exit facet, the middle part of the described plane of incidence caves inward and forms an accommodating cavity for accommodating light source, the middle part of described exit facet caves inward and forms a concave spherical surface, it is characterized in that: the radius of establishing described concave spherical surface is R, R=L/[1+(γ-1)/(n-1)]; The summit that wherein L is described concave spherical surface is to the distance of the described plane of incidence, the refractive index that n is transparent bodies, 1.3≤γ≤1.5; Described side is fully reflecting surface, the bus of the described truncated cone-shaped transparent bodies broken line that many line segments are in turn connected to form of serving as reasons, every line segment and described lens axis angulation are 3.5 ° to 43.5 °, and the maximum gauge a of described exit facet and the described plane of incidence meet 1.45≤a/h≤1.85 to the ratio between the distance h of described exit facet.
2. flood lens according to claim 1, is characterized in that: 3.1mm≤R≤4.1mm.
3. flood lens according to claim 1, is characterized in that: two end points of every line segment equate with the formed angle of line at the center of the described plane of incidence.
4. flood lens according to claim 3, is characterized in that: described angle is 9.5 ° to 10.5 °.
5. flood lens according to claim 3, is characterized in that: described broken line is in turn connected to form by five line segments;
Article one, line segment and described lens axis angulation are 43.5 °;
Second line segment and described lens axis angulation are 33.5 °;
Article three, line segment and described lens axis angulation are 23.5 °;
Article four, line segment and described lens axis angulation are 13.5 °;
Article five, line segment and described lens axis angulation are 3.5 °.
6. flood lens according to claim 1, is characterized in that: 8mm≤h≤9mm.
7. flood lens according to claim 1, is characterized in that: described accommodating cavity is cylindrical.
8. flood lens according to claim 1, is characterized in that: the material of described transparent bodies is Merlon or polymethyl methacrylate.
9. a light fixture, comprise LED light source and flood lens, described flood lens comprises take the circular platform type transparent bodies that lens axis is symmetry axis, described transparent bodies comprises the exit facet that the plane of incidence that diameter is less is larger with diameter and is connected the side of the described plane of incidence and described exit facet, described plane of incidence middle part caves inward and forms an accommodating cavity for accommodating described LED light source, formation concave spherical surface caves inward in the middle part of described exit facet, it is characterized in that: the radius of establishing described concave spherical surface is R, R=L/[1+(γ-1)/(n-1)]; The summit that wherein L is described concave spherical surface is to the distance of the described plane of incidence, the refractive index that n is transparent bodies, 1.3≤γ≤1.5; Described side is fully reflecting surface, the bus of the described truncated cone-shaped transparent bodies broken line that many line segments are in turn connected to form of serving as reasons, every line segment and described lens axis angulation are 3.5 ° to 43.5 °, and the maximum gauge a of described flood lens exit facet and the described flood lens plane of incidence meet 1.45≤a/h≤1.85 to the ratio between the distance h of described exit facet.
10. light fixture according to claim 9, is characterized in that: the beam projecting angle of described LED light source after described flood lens is 59.5 ° to 60.5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110129311.4A CN102788313B (en) | 2011-05-18 | 2011-05-18 | Floodlight lens and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110129311.4A CN102788313B (en) | 2011-05-18 | 2011-05-18 | Floodlight lens and lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102788313A CN102788313A (en) | 2012-11-21 |
| CN102788313B true CN102788313B (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110129311.4A Expired - Fee Related CN102788313B (en) | 2011-05-18 | 2011-05-18 | Floodlight lens and lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102788313B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007265688A (en) * | 2006-03-27 | 2007-10-11 | Harison Toshiba Lighting Corp | Collimation lens and lighting fixture using this |
| CN101251611A (en) * | 2007-02-20 | 2008-08-27 | 赛克尼克斯股份有限公司 | Focusing lens for LED |
| CN101598292A (en) * | 2008-06-06 | 2009-12-09 | 鸿富锦精密工业（深圳）有限公司 | LED light source module |
| JP2011095327A (en) * | 2009-10-27 | 2011-05-12 | Panasonic Electric Works Co Ltd | Illuminator and illuminator for signboard |
-
2011
- 2011-05-18 CN CN201110129311.4A patent/CN102788313B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007265688A (en) * | 2006-03-27 | 2007-10-11 | Harison Toshiba Lighting Corp | Collimation lens and lighting fixture using this |
| CN101251611A (en) * | 2007-02-20 | 2008-08-27 | 赛克尼克斯股份有限公司 | Focusing lens for LED |
| CN101598292A (en) * | 2008-06-06 | 2009-12-09 | 鸿富锦精密工业（深圳）有限公司 | LED light source module |
| JP2011095327A (en) * | 2009-10-27 | 2011-05-12 | Panasonic Electric Works Co Ltd | Illuminator and illuminator for signboard |
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| Publication number | Publication date |
|---|---|
| CN102788313A (en) | 2012-11-21 |
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Granted publication date: 20140219 Termination date: 20200518 |