CN102102847A - LED (light emitting diode) area light source lens - Google Patents
LED (light emitting diode) area light source lens Download PDFInfo
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- CN102102847A CN102102847A CN2009102596352A CN200910259635A CN102102847A CN 102102847 A CN102102847 A CN 102102847A CN 2009102596352 A CN2009102596352 A CN 2009102596352A CN 200910259635 A CN200910259635 A CN 200910259635A CN 102102847 A CN102102847 A CN 102102847A
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Abstract
The invention provides an LED (light emitting diode) area light source lens, wherein an LED point light source is converted into an area light source. One embodiment of the area light source is as follows: an inverted cone-shaped light reflecting concave part is formed at the top of the interior of the lens; a light source concave part is formed at the bottom of the interior of the lens, so that the LED point light source is arranged at the light source concave part, and the light source concave part and the light reflecting concave part are corresponding; and screen dots are formed at the bottom of the area light source lens, and then a reflecting layer is formed. The area light source lens has the following functions: the main components of lights emitted by the LED light source enter the area light source lens from the bottom and illuminate the light reflecting concave part, and the direction of the main components of the lights is changed by the side face of the light reflecting concave part, thus the main components transmit along the direction which is nearly parallel to the light emergent surface of the area light source lens, are reflected by the screen dots at the bottom of the area light source lens and the reflecting layer, and emit from the surface of the top of the area light source lens, so that an area light source which has the same size with the area light source lens is formed, other than the point light source which is packaged by the LED and has the same size with the light emergent surface.
Description
Technical field
The present invention discloses and a kind of the LED spot light is transformed into the lens of area source, belongs to technical field of semiconductor illumination.
Background technology
LED has been widely used in special lighting and general lighting field, and therefore the spot light characteristic that LED has, in a lot of the application, need be transformed into area source to the LED spot light.One of method is that a plurality of led light sources are arranged on a plane.But, when said method being applied to some field, particularly for the LED spot light of (1) lesser amt; (2) need the zone of irradiation nearer from the LED spot light, the spot light characteristic of LED is still very outstanding.
Therefore, need a kind of lens devices, can be transformed into area source to the spot light of LED.
Summary of the invention
The invention provides a kind of lens, can be transformed into area source to the LED spot light,, abbreviate the area source lens as even also like this for single led spot light.The structure of an embodiment of area source lens is as follows, a transparent substance, and the recess (abbreviating the light reflective recess as) of a reverse taper shape is formed on the top of portion within it, and the function of light reflective recess is the direction of propagation that changes light; The recess (abbreviating the light source recess as) of a rectangular shape or cylindrical shape is formed on the bottom of portion within it, and the function of light source recess is that the LED spot light is set therein; Wherein, light source recess corresponding with the light reflective recess (preferred embodiment: the summit of light reflective recess is directly over the center of light source recess); Form the site on the bottom of area source lens, form a reflecting layer then; Form concaveconvex structure on the top of area source lens; Form reflectance coating on the side of area source lens.The function of area source lens is as follows, the main component of the light that led light source sends is from bottom entering surface light lens, shine the light reflective recess, the side of light reflective recess changes the direction of propagation of the main component of light, make it along the direction propagation almost parallel with the light output surface (surface at top) of area source lens, site on the bottom surface of quilt cover light lens and reflective layer reflects, penetrate from the light output surface of area source lens, thereby form an area source onesize, and no longer be the onesize spot light of light output surface that encapsulates with LED with the area source lens.
Area source lens of the present invention, wherein,
(A) setting of area source lens is to select from one group is provided with, the setting of this group comprises, (1) transparent area source lens, (2) the inside doping light diffusing particles (light-scattering particle) of area source lens, (3) top coating one deck light diffusing particles (diffusion particle), the inside doping light diffusing particles of (4) area source lens and top coating one deck light diffusing particles of area source lens.
(B) profile on the surface at the top of area source lens is to select from one group of shape, and this group shape comprises, circular, polygon, and polygon comprises equilateral triangle, square, regular hexagon, etc.
(C) side of area source lens is to select from one group of side, this group side comprises: the surperficial acutangulate side at the top of (1) and area source lens, (2) with the surperficial rectangular side at the top of area source lens, the surperficial obtuse-angulate side at (3) and the top of area source lens.
(D) shape of the side in the cross section of area source lens is to select from one group of shape, and this group shape comprises, straight line, curve, broken line.
(E) setting of the side of area source lens is to select from one group is provided with, and the setting of this group comprises, forms reflectance coating on the surface of (1) side, bonding one reflectance coating on the surface of (2) side.
(F) setting on the surface at the top of area source lens is to select from one group is provided with, and the setting of this group comprises (1) plane; (2) form concaveconvex structure on the surface at top, concaveconvex structure comprises, alligatoring structure, photon crystal structure; (3) form fluorescent powder membrane on the surface at top; (4) combination of above-mentioned setting.
(G) setting of the bottom surface of area source lens is to select from one group is provided with, and the setting of this group comprises (1) plane, (2) form the site on the surface of bottom surface, (3) form fluorescent powder membrane on the surface of bottom surface, form reflectance coating on the surface of (4) bottom surface, the combination of (5) above-mentioned setting.
(H) structure of the bottom surface of area source lens is to select from one group of structure, and this group structure comprises, (1) plane, and (2) have the light source recess.
(I) as funnel, the bottom surface of light reflective recess has only profile.The shape of the profile of the bottom of light reflective recess is to select from one group of shape, and this group shape comprises, circular, polygon, and polygon comprises equilateral triangle, square, regular hexagon, etc.
(J) shape of the side in the cross section of light reflective recess is to select from one group of shape, and this group shape comprises, straight line, curve, broken line.
(K) setting of light reflective recess is to select from one group is provided with, and the setting of this group comprises, forms reflectance coating on the side of (1) light reflective recess, non-filler in (2) light reflective recess, and reverberation is filled at the top of (3) light reflective recess.
The setting of any one area source lens in above-mentioned (A), (B) profile on the surface at the top of any one area source lens in, (C) side of any one area source lens in, (D) shape of the side in the cross section of any one area source lens in, (E) setting of the side of any one area source lens in, (F) setting on the surface at the top of any one area source lens in, (G) setting of the bottom surface of any one area source lens in, (H) structure of the bottom surface of any one area source lens in, (I) shape of the profile of the bottom of any one light reflective recess in, (J) shape of the side in the cross section of any one light reflective recess in, (K) setting of any one light reflective recess is combined and is promptly constituted one embodiment of the present of invention in.
Purpose of the present invention and the effect that can reach are as follows:
(1) area source lens provided by the invention convert the spot light of single led encapsulation to area source.
(2) area source lens provided by the invention are easy to produce in batches.
The present invention and its feature and benefit will better be showed in the following detailed description.
Description of drawings
The embodiment of Fig. 1 display surface light lens.
The embodiment of the shape of Fig. 2 display surface light lens, setting, structure.
Specific embodiment
Though embodiments of the invention will be described below, following description just illustrates principle of the present invention, rather than limits the invention to the description of following embodiment.
Note; Following all embodiment that are applicable to area source lens of the present invention:
(1) ratio of each several part is not represented the true ratio of the each several part of embodiment among each figure.
(2) form the light reflective recess at the top of the inside of area source lens, the side of light reflective recess the bottom from the area source lens is entered and the main component of the light at directive top in the side of the inside of area source lens spigot surface light lens, promptly, after the incident light entering surface light lens, penetrate on the side of light reflective recess, under its effect, the main component of light is in the direction propagation almost parallel with the light output surface of area source lens of the edge, inside of area source lens, by the top of the site of bottom and reflectance coating direct light source lens and ejaculation therefrom.
(3) setting of area source lens is to select from one group is provided with, and the setting of this group comprises: (for example, Fig. 2 a) for (a) transparent area source lens; (b) the inside doping light diffusing particles of area source lens (for example, Fig. 2 d); (c) top coating one deck light diffusing particles of area source lens (not showing in the drawings); (d) the inside doping light diffusing particles of area source lens and top coating one deck light diffusing particles (not showing in the drawings).The difference setting of area source lens has determined the area source lens to have two types, when light lens adopts being provided with of (a), does not have diffusion function face to face.When light lens adopts (b), (c) and being provided with (d), has diffusion function (also can be referred to as: diffusion type-area source lens, to show difference) face to face.
(4) light is subjected to scattering and reflex simultaneously when the internal communication of diffusion type-area source lens, and penetrates from the surface at the top of area source lens.
(5) the suitable light scattering that diffusion type-area source lens are set is than (optical diffusion ratio), light transmission (total optical transmission), the feature of light reflective recess and the shape and the density of distribution and site, to reach the brightness uniformity of emergent light.For example, the light scattering ratio may be selected between 5% to 90%, and light transmission may be selected between 40% to 95%.
(6) feature of the suitable light reflective recess that area source lens (non-diffusion type-area source lens) are set and the shape and the density of distribution and site are to reach the brightness uniformity of emergent light.
(7) thickness of area source lens depends on the dimension of the light output surface of LED encapsulation.
(8) profile on the surface at the top of area source lens is to select from one group of shape, and this group shape comprises that (a) circular (for example, Fig. 1 a), (b) polygon, polygon (for example comprise equilateral triangle (for example, Fig. 1 g), square, Fig. 1 e), regular hexagon (for example, Fig. 1 f), etc.
(9) side of area source lens is to select from one group of side, this group side comprises: (a) with the surperficial acutangulate side at the top of area source lens (for example, Fig. 2 f to Fig. 2 j), (b) with the surperficial rectangular side at the top of area source lens (for example, Fig. 2 a to Fig. 2 e), (c) with the surperficial obtuse-angulate side (for example, Fig. 2 k) at the top of area source lens.
(10) shape of the side in the cross section of area source lens is to select from one group of shape, and this group shape comprises, (a) straight line (for example, Fig. 2 f), (b) curve (for example, Fig. 2 g), (c) broken line (for example, Fig. 2 h).
(11) setting of the side of area source lens is to select from one group is provided with, and the setting of this group comprises, (a) forms reflectance coating (for example, Fig. 2 c and Fig. 2 j) on the surface of side, (b) bonding one reflectance coating (for example, Fig. 2 c and Fig. 2 j) on the surface of side.
(12) setting on the surface at the top of area source lens is to select from one group is provided with, and the setting of this group comprises, (a) (for example, Fig. 2 a) on the plane; (b) form concaveconvex structure (for example, Fig. 2 c and Fig. 2 j) on the surface at top, concaveconvex structure comprises, alligatoring structure, photon crystal structure; (c) form fluorescent powder membrane (for example, Fig. 2 e) on the surface at top; (d) combination of above-mentioned setting (not showing in the drawings).
(13) setting of the bottom surface of area source lens is to select from one group is provided with, the setting of this group comprises, (a) plane (for example, Fig. 2 a and Fig. 2 b), (b) form site (for example, Fig. 2 c and Fig. 2 j) on the surface of bottom surface, (c) form fluorescent powder membrane (not showing in the drawings) on the surface of bottom surface, (d) form reflectance coating (not showing in the drawings) on the surface of bottom surface, (e) combination of above-mentioned setting (not showing in the drawings).
(14) structure of the bottom surface of area source lens is to select from one group of structure, and this group structure comprises, (a) (for example, Fig. 2 a) (b) has light source recess (for example, Fig. 2 b to Fig. 2 j) on the plane.
(15) the light reflective recess is shaped as reverse taper; The reverse taper shape comprises: (a) inverted cone shape (for example, Fig. 1 a to Fig. 1 d); (b) inverted pyramid shape (for example, Fig. 1 e to Fig. 1 g).
(16) height of light reflective recess is less than or equal to the thickness (Fig. 2 shows the thickness of the height of light reflective recess less than the area source lens, equals the situation of the thickness of area source lens for the height of light reflective recess, shows in the drawings) of area source lens.
(17) (for example, for rounded bottom surface, its minimum dimension is its diameter to the minimum dimension of the profile of the bottom surface of light reflective recess; For rectangular bottom surface, its minimum dimension is the length of side of its minor face.) (for example, for circular light output surface, its maximum dimension is its diameter more than or equal to the maximum dimension of the light output surface of LED encapsulation; For the rectangle light output surface, its maximum dimension is its diagonal).
(18) as funnel, the bottom surface of light reflective recess has only profile.The shape of the profile of the bottom surface of light reflective recess is to select from one group of shape, and this group shape includes, but are not limited to: (a) circular (for example, Fig. 1 a to Fig. 1 d); (b) polygon (for example, Fig. 1 e to Fig. 1 g), polygon comprises equilateral triangle, square, regular hexagon, etc.
(19) shape of the side in the cross section of light reflective recess is to select from one group of shape, and this group shape includes, but are not limited to: (a) straight line (for example, Fig. 2 k); (b) curve (for example, Fig. 2 m); (c) broken line (for example, Fig. 2 n); The light at directive top becomes the light of the side of directive area source lens at the inner transformation of area source lens as long as the side of light reflective recess can enter most bottom from the area source lens, promptly, as long as make after the main component entering surface light lens of incident light, the side of light reflective recess has changed the direction of propagation of the main component of light, makes the direction propagation almost parallel with the light output surface of area source lens of its edge in the area source lens.
(20) setting of light reflective recess is to select from one group is provided with, and the setting of this group comprises: (a) in the light reflective recess non-filler (for example, Fig. 2 a); (b) form one deck reflectance coating (for example, Fig. 2 c and Fig. 2 j) on the light reflective recess side; (c) light reflective recess top is provided with a reflecting object identical shaped with recess (not showing in the drawings).
(21) cooperate the LED encapsulation of adopting, the height of selective light reflective recess and the size of bottom surface, make the side of light reflective recess change the direction of propagation of the main component of light, make the direction propagation almost parallel of its edge in the area source lens with the light output surface of area source lens,, make that the bright dipping of area source lens is even.
(22) with the corresponding position of light reflective recess on, that is, and with the corresponding position of LED encapsulation on, roughening treatment is carried out in the bottom surface of opposite light lens, reduces reflection of incident light.
The embodiment of Fig. 1 display surface light lens.
The schematic diagram of an embodiment of Fig. 1 a display surface light lens.Area source lens 101 have cylindrical shape, and the profile on the surface at its top is circular.The light reflective recess 102 of inverted cone (funnel) shape is formed on the top of the inside of area source lens 101, and its bottom surface has only profile.The structure of the bottom surface of area source lens 101 is light source recess 103y that cylindrical shape is formed on the bottom of portion within it.The summit of light reflective recess 102 is directly over the center of light source recess 103y.The side 101c of area source lens 101 is perpendicular to the top of area source lens 101.
The top view of an embodiment of the area source lens that Fig. 1 b exploded view 1a shows.
The schematic diagram of an embodiment of Fig. 1 c display surface light lens.The light reflective recess 102 of inverted cone (funnel) shape is formed on the top of the inside of the area source lens 101 of cylindrical shape, and the structure of the bottom surface of area source lens 101 is light source recess 103f that cube shaped is formed on the bottom of portion within it.The summit of light reflective recess 102 is directly over the center of light source recess 103y.
The top view of an embodiment of the area source lens that Fig. 1 d exploded view 1c shows.
The schematic diagram of an embodiment of Fig. 1 e display surface light lens.Area source lens 101 have rectangular shape, and the profile on the surface at its top is a quadrangle.The light reflective recess 102 of the shape of falling the rectangular pyramid is formed on the top of the inside of area source lens 101.The structure of the bottom surface of area source lens 101 is light source recess 103f that cube shaped is formed on the bottom of portion within it.
The top view of an embodiment of Fig. 1 f display surface light lens.Area source lens 101 have the hexahedron shape, and the profile on the surface at its top is a hexagon.The light reflective recess 102 of the shape of falling the hexagonal pyramid is formed on the top of the inside of area source lens 101, and the structure of the bottom surface of area source lens 101 is planes.
The top view of an embodiment of Fig. 1 g display surface light lens.Area source lens 101 have prism shapes, and the profile on the surface at its top is a triangle.The light reflective recess 102 of the shape of falling the triangular pyramid is formed on the top of the inside of area source lens 101, and the structure of the bottom surface of area source lens 101 is planes.
The sectional view of the embodiment of the shape of Fig. 2 display surface light lens, setting, structure.
Notice that the profile on the surface at the top of the area source lens that Fig. 2 shows can be that (1) is circular, and (for example, Fig. 1 a), (2) regular polygon, regular polygon (for example comprise equilateral triangle (for example, Fig. 1 g), square, Fig. 1 e), regular hexagon (for example, Fig. 1 f), etc.As funnel, the bottom surface of light reflective recess has only profile.The shape of the profile of the bottom surface of light reflective recess is to select from one group of shape, and this group shape comprises: (1) is circular, and (for example, Fig. 1 a), (2) regular polygon, regular polygon (for example comprise equilateral triangle (for example, Fig. 1 g), square, Fig. 1 e), regular hexagon (for example, Fig. 1 f).
Fig. 2 a shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201, and the side 202c in the cross section of light reflective recess 202 is a straight line.Area source lens 201 have top 201t and bottom 201b.The structure of the bottom surface 201b of area source lens 201 is the plane.The setting of the bottom surface 201b of area source lens 201 is the plane.The side 201c of area source lens 201 is perpendicular to the top 201t of area source lens 201.The setting on the surface of the top 201t of area source lens 201 is the plane.
Fig. 2 b shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201.The structure of the bottom surface of area source lens 201 is to have light source recess 203.The setting of the bottom surface of area source lens 201 is planes.
Fig. 2 c shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201, and the setting of light reflective recess 202 is to have reflectance coating 202f on the side, and reflectance coating 202f can be formed on the side, also can be that reflectance coating is bonded on the side.The setting on the surface at the top of area source lens 201 is to form concaveconvex structure 205 on the surface at top, and concaveconvex structure 205 comprises, alligatoring structure, photon crystal structure.The setting of the side of area source lens 201 is to form reflectance coating 201f on the side.The structure of the bottom surface of area source lens 201 is that the bottom surface has light source recess 203.The setting of the bottom surface of area source lens 201 is that the bottom surface has site 206.
Fig. 2 d shows the sectional view of an embodiment of area source lens of the present invention.The setting of area source lens 201a is its inner doping light diffusing particles.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201a.The structure of the bottom surface of area source lens 201a is that the bottom surface has light source recess 203, and the setting of the bottom surface of area source lens 201a is that the bottom surface is the plane.
Fig. 2 e shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201.The structure of the bottom surface of area source lens 201 is that the bottom surface has light source recess 203.The setting on the surface at area source lens 201a top is to form a fluorescent powder membrane 207 on the surface at top.
Fig. 2 f shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201, the structure of the bottom surface of area source lens 201 is that the bottom surface has light source recess 203, and the surperficial 201t at the side 201z of area source lens 201 and the top of area source lens 201 acutangulates.The shape of side 201z is a straight line.
Fig. 2 g shows the sectional view of an embodiment of area source lens of the present invention.The shape of the side 201q of area source lens 201 is a curve.
Fig. 2 h shows the sectional view of an embodiment of area source lens of the present invention.The shape of the side 201w of area source lens 201 is a broken line.
Fig. 2 j shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201, the setting of light reflective recess 202 is to have reflectance coating 202f on the side, reflectance coating 202f can be formed on the side, the method that forms comprises chemical plating and evaporation, also can be that reflectance coating is bonded on the side.The setting on the surface at the top of area source lens 201 is that the surface at top has concaveconvex structure 205.The setting of the side of area source lens 201 is that the side has reflectance coating 201f, and reflectance coating 201f can be formed on the side, also can be that a reflectance coating is bonded on the side.The structure of the bottom surface of area source lens 201 is that the bottom surface has light source recess 203, and the setting of the bottom surface of area source lens 201 is that the bottom surface has site 206.
Fig. 2 k shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201, and the side 201c of area source lens 201 becomes the obtuse angle with the surperficial 201t at the top of area source lens 201.The structure of the bottom surface 201b of area source lens 201 is the plane.The setting of the bottom surface 201b of area source lens 201 is the plane.
Fig. 2 m shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201, and the side 202q in the cross section of light reflective recess 202 is curves.The structure of the bottom surface 201b of area source lens 201 is that bottom surface 201b has light source recess 203, and the setting of the bottom surface 201b of area source lens 201 is that bottom surface 201b is the plane.
Fig. 2 n shows the sectional view of an embodiment of area source lens of the present invention.The light reflective recess 202 of reverse taper shape is formed on the top of the inside of area source lens 201, and the side 202t in the cross section of light reflective recess 202 is broken lines.
Top concrete description does not limit the scope of the invention, and only provides some specific illustrations of the present invention.Therefore covering scope of the present invention should be determined by claim and their legal equivalents, rather than by above-mentioned specific detailed description and embodiment decision.
Claims (10)
1. LED area source lens comprise lens; It is characterized in that the light reflective recess of a reverse taper shape is formed on the top of the inside of described lens; The side of described lens is to select from one group of side, and this group side comprises: (a) with the surperficial acutangulate side at the top of described lens; (b) with the surperficial rectangular side at the top of described lens; (c) with the surperficial obtuse-angulate side at the top of described lens; The shape of the side in the cross section of described lens is to select from one group of shape, and this group shape comprises, (a) straight line; (b) curve; (c) broken line.
2. the LED area source lens of claim 1 is characterized in that, the setting of described lens is to select from one group is provided with, and the setting of this group comprises, (a) transparent lens; (b) lens of inner doping light diffusing particles; (c) lens of top coating one deck light diffusing particles; (d) lens of inner doping light diffusing particles and top coating one deck light diffusing particles.
3. the LED area source lens of claim 1 is characterized in that, the profile on the surface at the top of described lens is to select from one group of shape, and this group shape comprises, (a) circle; (b) polygon.
4. the LED area source lens of claim 1 is characterized in that, the setting of the side of described lens is to select from one group is provided with, and the setting of this group comprises, (a) forms reflectance coating on the surface of side; (b) bonding one reflectance coating on the surface of side.
5. the LED area source lens of claim 1 is characterized in that, the setting on the surface at the top of described lens is to select from one group is provided with, and the setting of this group comprises (a) plane; (b) form concaveconvex structure on the surface at top, described concaveconvex structure comprises, alligatoring structure and photon crystal structure; (c) form fluorescent powder membrane on the surface at top; (d) combination of above-mentioned setting.
6. the LED area source lens of claim 1 is characterized in that, the setting of the bottom surface of described lens is to select from one group is provided with, and the setting of this group comprises (a) plane; (b) form the site on the surface of bottom surface; (c) form fluorescent powder membrane on the surface of bottom surface; (d) form reflectance coating on the surface of bottom surface; (e) combination of above-mentioned setting.
7. the LED area source lens of claim 1 is characterized in that, the structure of the bottom surface of described lens is to select from one group of structure, and this group structure comprises, (a) plane; (b) has the light source recess.
8. the LED area source lens of claim 1 is characterized in that, the shape of the profile of the bottom of described smooth reflective recess is to select from one group of shape, and this group shape comprises, (a) circle; (b) polygon; Polygon comprises equilateral triangle, square, regular hexagon.
9. the LED area source lens of claim 1 is characterized in that, the shape of the side in the cross section of described smooth reflective recess is to select from one group of shape, and this group shape comprises, (a) straight line; (b) curve; (c) broken line.
10. the LED area source lens of claim 1 is characterized in that, the setting of described smooth reflective recess is to select from one group is provided with, and the setting of this group comprises, (a) forms reflectance coating on the side of light reflective recess; (b) non-filler in the light reflective recess; (c) reverberation is filled at the top of light reflective recess.
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| CN2009102596352A CN102102847A (en) | 2009-12-21 | 2009-12-21 | LED (light emitting diode) area light source lens |
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| CN2009102596352A CN102102847A (en) | 2009-12-21 | 2009-12-21 | LED (light emitting diode) area light source lens |
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Application publication date: 20110622 |