CN116928634A - Narrow angle plane lens and lighting lamp - Google Patents

Abstract

The application relates to an optical lens, and aims to solve the problem of light distribution of a light-emitting diode. The narrow angle planar lens comprises a first end face, a second end face and a side ring face. The first end face comprises an opening face, a vertical face and an arched face, and the opening face is connected with the arched face through the vertical face. The second end face comprises a light-emitting surface, the arch-shaped surface is arranged between the opening surface and the light-emitting surface, and the arch-shaped surface is formed by protruding from one side of the light-emitting surface to the side of the opening surface. The side ring surface is arranged between the first end surface and the second end surface, the side ring surface and the light-emitting surface are arranged at an acute angle, the side ring surface comprises four side surfaces, the angle between the third side surface and the light-emitting surface is A3, the angle between the fourth side surface and the light-emitting surface is A4, and the condition A3 & lt A4 is met. The application has the beneficial effects that the narrow-angle plane lens changes the light path of the light-emitting diode, and achieves the effects of proper concentration of light distribution of the light source, uniform light spots and enlarged illumination range.

Description

Narrow angle plane lens and lighting lamp

Technical Field

The application relates to the technical field of optics, in particular to a narrow-angle plane lens and a lighting lamp.

Background

With the increasing progress of the manufacturing technology of light emitting diodes, lamps manufactured using the light emitting diodes have advantages of high brightness, power saving, long life span, etc., and the light emitting diodes have been widely used in public places and tunnels. A lamp manufactured by using light emitting diodes generally has a light source formed by combining a plurality of light emitting diodes, so that the light source can be concentrated to increase brightness and expand an irradiation range.

The existing light-emitting diode is used as a light source, and if the lens structure is improperly designed, the light of the light source is easy to form the phenomena of too concentrated light distribution, uneven light spots, small visible area and the like. The use of such light sources in public places can cause poor visual effects. The light source is used in a tunnel, and the requirement that the light source has a larger irradiation range in the running direction of the vehicle cannot be met. How to solve the technical problems is considered by the person skilled in the art.

Disclosure of Invention

The application provides a narrow-angle plane lens and a lighting lamp, which are used for solving the problems of too concentrated light distribution, uneven light spots, small visible area and the like of a light source.

Embodiments of the present application are implemented as follows:

a narrow angle planar lens comprising: the first end face, the second end face and the side ring face. The first end face comprises an opening face, a vertical face and an arched face, and the opening face is connected with the arched face through the vertical face. The second end face comprises a light-emitting face, the arch face is arranged between the opening face and the light-emitting face, and the arch face is formed by protruding from one side of the light-emitting face to one side of the opening face. The side ring surface is arranged between the first end surface and the second end surface, the side ring surface and the light emitting surface are arranged at an acute angle and an included angle, the side ring surface comprises a first side surface, a second side surface, a third side surface and a fourth side surface, the first side surface and the second side surface are oppositely arranged, the third side surface and the fourth side surface are oppositely arranged, the four side surfaces are sequentially connected, the included angle of the third side surface and the light emitting surface is A3, the included angle of the fourth side surface and the light emitting surface is A4, and the condition A3 & lt A4 is met for expanding the light irradiation range to the third side surface.

Further, the light is refracted through the vertical surface and the arched surface, the light path is changed, and the refracted light enters the narrow-angle plane lens. The light refracted by the vertical face irradiates the first side face, the second side face, the third side face and the fourth side face, the light is reflected by each side face, the light path is changed again, and the reflected light is emitted from the light emitting face to form a narrow-angle plane lens. The light refracted by the arched surface is directly emitted from the light-emitting surface to form a narrow-angle plane lens. When the light is reflected by each side, the light path changes more remarkably at the third side because the third side and the fourth side meet the condition A3 < A4, so that the irradiation range of the light is widened towards the third side. The narrow-angle planar lens changes the light path by arranging the vertical face, the arched face and the asymmetric side face, thereby solving the problem of small visible area of light distribution of light rays and achieving the effect of expanding the light irradiation range on the third side face of the narrow-angle planar lens.

In one possible embodiment:

the included angle between the first side face and the light-emitting face is A1, the included angle between the second side face and the light-emitting face is A2, and the condition A1=A2 is met.

Further, when the light is reflected by the side ring surface, the first side surface and the second side surface satisfy the condition a1=a2, and the light paths are symmetrically distributed on the first side surface and the second side surface, so that the light irradiation range is uniformly and symmetrically distributed on the first side surface and the second side surface. The narrow-angle plane lens is provided with symmetrical side ring surfaces, so that the light path is uniformly changed, the problem of uneven light spots is solved, and the effect that the light irradiation range is uniformly distributed on the symmetrical sides of the narrow-angle plane lens is achieved.

In one possible embodiment:

the side ring surface further comprises an extension surface, the extension surface is connected with the opening surface, the second end surface further comprises a step surface, the step surface is connected with the light emitting surface, one side of the first side surface, one side of the second side surface, one side of the third side surface and one side of the fourth side surface are connected with the extension surface, the other side of each side surface is connected with the step surface, each side surface is bent to the step surface by the extension surface, and each side surface protrudes outwards from the center of the arched surface.

Further, the refraction light rays passing through the vertical face are reflected on the side ring surface, the incidence angle of the reflection light rays is gradually increased from the middle to the two sides of the side ring surface, and the reflection angle of the reflection light rays is increased as the reflection angle of the reflection light rays is closer to the two sides. The side ring surface has an outwards convex shape, so that the change trend of the incident angle of the light is gradually reduced, and the corresponding change trend of the reflection angle is also gradually reduced, thereby playing a role in gathering the reflection angle of the light towards the middle. The light reflected by the side ring surface is emitted from the light emitting surface, and the part of the illumination range close to the outer side edge correspondingly has a trend of being folded toward the middle. Therefore, the problem that light distribution is too concentrated is solved, light is properly folded, and the effect that the light irradiation range is folded towards the middle of the narrow-angle plane lens is achieved.

In one possible embodiment:

the thickness between the arch surface and the light-emitting surface is thick in the middle, the two sides of the arch surface are uniformly thinned, and the part between the arch surface and the light-emitting surface is provided with a convex lens structure.

Furthermore, when light is refracted through the arched surface, the arched surface is thicker than the middle of the light emergent surface, and the two sides of the arched surface are uniformly thinned, so that the arched surface has the function of a convex lens, and the refracted light is gathered towards the middle. Therefore, the problems of too concentrated light distribution and uneven light spots are solved, light rays of the arched surface in the middle part are properly gathered, and the effects of improving the brightness of the refracted light rays and homogenizing the light spots are achieved.

In one possible embodiment:

the facade comprises a first plane, a second plane, a third plane and a fourth plane, wherein the first plane and the second plane are oppositely arranged, the third plane and the fourth plane are oppositely arranged, the four planes are sequentially connected, and a light path of light incident through the facade is refracted to the side ring surface.

Further, the vertical surface of the narrow-angle plane lens is provided with a first plane, a second plane, a third plane and a fourth plane respectively, and each plane is arranged corresponding to the side ring surface. The light entering from the narrow angle plane lens is refracted through each plane, the corresponding refraction of the light reaches the side ring surface, the refracted light is reflected through the side ring surface, the light path of the light is changed, the emergent angle of the reflected light is enlarged towards the periphery of the narrow angle plane lens, the reflected light is emitted from the periphery of the emergent surface, and the irradiation range of the reflected light is enlarged towards the periphery. Therefore, the problem of small visible area of light distribution is solved, and the effect of expanding the light irradiation range is achieved.

In one possible embodiment:

the facade with the obtuse angle contained angle setting is personally submitted to the opening, first plane with the contained angle of opening is B1, the second plane with the contained angle of opening is B2, the third plane with the contained angle of opening is B3, the fourth plane with the contained angle of opening is B4, satisfies condition B1=B2, B3=B4, and B1 < B3 is used for increasing the third plane with the light inlet of fourth plane.

Further, the included angle of the vertical face and the opening face are arranged at an obtuse included angle, so that the light received by the vertical face is increased, and the light entering quantity of the light entering the vertical face is increased. The included angle between the vertical face and the opening face is an obtuse angle, and the larger the included angle is, the more light rays are received by the vertical face, so that the higher the illumination intensity is. The condition B1=B2 and B3=B4 are satisfied, so that the illumination intensity is uniformly and symmetrically distributed; the condition B1 is smaller than B3, and the light entering quantity of the third plane and the fourth plane is increased, so that the illumination intensity of the third plane and the fourth plane is increased. Therefore, the problem that light distribution is too concentrated is solved, and the effect of uniformly increasing the light irradiation intensity is achieved.

In one possible embodiment:

the narrow-angle plane lens is matched with a light source for use, the opening face, the vertical face and the arched face are enclosed to form a concave cavity, and the light source is arranged in the concave cavity.

Further, by arranging the concave cavity, the position where the light source is arranged is provided, and the narrow-angle plane lens is matched with the light source for use. Therefore, the problems that the light source passes through the narrow-angle plane lens, the illumination is too concentrated, the light spots are uneven, the visible area is small and the like are solved, and the effect of light distribution of the narrow-angle plane lens is achieved.

In one possible embodiment:

the narrow-angle plane lens is matched with a light source, the connection parts of the first side face, the second side face, the third side face and the fourth side face and the extension face are connection edges, and the light source is arranged between the plane where the connection edges are located and the plane where the opening face is located.

Further, by arranging the light source between the plane where the connecting edge is located and the plane where the opening face is located, the light starting position is controlled between the plane where the connecting edge is located and the plane where the opening face is located, so that light of the light source completely enters the vertical face and the arched face. Therefore, the problems that the light source passes through the narrow-angle plane lens, the illumination is too concentrated, the light spots are uneven, the visible area is small and the like are solved, and the effect of light distribution of the narrow-angle plane lens is achieved.

In one possible embodiment:

the light emitted by the light source is refracted to the side ring surface through the vertical surface, the incident angle of the light on the side ring surface is alpha, the condition alpha is more than or equal to 39 degrees, and the light is totally reflected on the side ring surface.

Furthermore, by setting the position of the light source, according to the physical properties of the material of the narrow-angle planar lens and the refraction angle of the light rays on the vertical surface, the incident angle of the refracted light rays entering the lateral annular surface is alpha, the incident angle is more than or equal to the critical angle of the narrow-angle planar lens, the condition that alpha is more than or equal to 39 degrees is satisfied, and the light rays are totally reflected on the lateral annular surface. Therefore, the problem of uneven light distribution of the light is solved, the light is totally reflected in the narrow-angle plane lens, and the effect of avoiding the light from refracting out of the lens at the side ring surface and avoiding the light intensity attenuation is achieved.

In one possible embodiment:

the lighting lamp comprises a lamp shade and the narrow-angle plane lens, wherein the lamp shade is arranged on the second end face, and the lamp shade is fixedly connected with the narrow-angle plane lens.

Further, through setting up the fixed multiunit narrow angle plane lens of lamp shade, the whole grading of light of multiunit narrow angle plane lens solves the illumination lamps and lanterns and shines too concentrated, the facula is uneven to and the visual area subalternation problem, satisfies the requirement of using the illumination lamps and lanterns under the different environment, in order to reach suitable illumination intensity, even facula, and the effect of great illumination scope.

Compared with the prior art, the narrow-angle plane lens and the lighting lamp change the light path by arranging the convex arched surface, the inclined vertical surface, the asymmetric side ring surface and the like, so that the problems of excessively concentrated light distribution, uneven light spots, small visible area and the like of the light source are solved, and the effects of proper concentration of light distribution, uniform light spots and expansion of the illumination range of the light source are achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a narrow angle planar lens according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the narrow angle planar lens of FIG. 1 taken along the direction II-II;

FIG. 3 is a schematic cross-sectional view of the narrow angle planar lens of FIG. 1 taken in the direction III-III;

FIG. 4 is a schematic perspective view of a narrow angle planar lens according to another embodiment of the present application;

fig. 5 is a schematic perspective view of a lighting fixture according to another embodiment of the application;

FIG. 6 is a schematic view of the light field of the narrow angle planar lens of FIG. 1 in combination with a light source;

fig. 7 is a schematic view of a light distribution curve of the narrow angle planar lens of fig. 1 in combination with a light source.

Description of main reference numerals:

narrow angle planar lens 1

First end face 11

Arched surface 111

Facade 112

First plane 113

Second plane 114

Third plane 115

Fourth plane 116

Opening surface 117

Second end face 12

Step surface 121

Light-emitting surface 122

Side ring surface 13

First side 131

Second side 132

Third side 133

Fourth side 134

Extension surface 135

Connecting edge 136

Light source 14

First light beam 141

Second light beam 142

Lighting lamp 2

Lampshade 21

The application will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.

Examples

Fig. 1 is a schematic perspective view of a narrow angle planar lens 1 according to an embodiment of the present application, and fig. 2 is a schematic cross-sectional view of the narrow angle planar lens 1 along the direction ii-ii of fig. 1, and fig. 1 and 2 will be described in conjunction with each other since a part of the structure cannot be fully shown by one view.

A narrow angle planar lens 1 comprising: the first end face 11, the second end face 12 and the side ring face 13. The first end face 11 includes an open face 117, a riser face 112 and an arcuate face 111, the open face 117 being connected to the arcuate face 111 by the riser face 112. The second end surface 12 includes a light-emitting surface 122, the arched surface 111 is disposed between the opening surface 117 and the light-emitting surface 122, and the arched surface 111 is formed by protruding from a side of the light-emitting surface 122 toward a side of the opening surface 117. The side ring surface 13 is disposed between the first end surface 11 and the second end surface 12, and the side ring surface 13 and the light emitting surface 122 form an acute included angle. The lateral ring surface 13 includes a first side 131, a second side 132, a third side 133, and a fourth side 134. The first side 131 is opposite to the second side 132, the third side 133 is opposite to the fourth side 134, and the four sides are connected in sequence. The angle between the third side surface 133 and the light-emitting surface 122 is A3, the angle between the fourth side surface 134 and the light-emitting surface 122 is A4, and the condition A3 < A4 is satisfied, so that the light irradiation range is expanded toward the third side surface 133.

Further, when light enters from the outside of the narrow angle planar lens 1, the optical path of the incident light changes between the vertical surface 112 and the arched surface 111 due to the difference in air density from the medium density of the narrow angle planar lens 1. When light enters the optical dense medium from the optical sparse medium, the light path is deflected towards the normal of the medium surface, so that refraction occurs in the narrow-angle plane lens 1, and the refraction angle of the light is smaller than the incident angle. The light is refracted at the surfaces of the vertical surface 112 and the arched surface 111, and the refracted light enters the narrow-angle planar lens 1. The light refracted by the arched surface 111 is refracted by the light paths on both sides of the arched surface 111 toward the middle of the arched surface 111 due to the characteristics of the convex lens in the arched surface 111, and the refracted light is directly emitted from the light emitting surface 122 to the narrow angle planar lens 1. The light refracted by the vertical surface 112 irradiates the first side 131, the second side 132, the third side 133 and the fourth side 134, the light is reflected on the surfaces of the respective sides, the light path is changed again, and the reflected light is emitted from the light emitting surface 122 to the narrow angle planar lens 1.

Fig. 3 is a schematic cross-sectional view of the narrow angle planar lens 1 of fig. 1 in the direction iii-iii.

The light is reflected on the surface of the side annular surface 13, and when the light is reflected by the side annular surface 13, the smaller the included angle between the side annular surface 13 and the light emitting surface 122 is, the greater the deflection degree of the light path change is. Since the third side face 133 and the fourth side face 134 satisfy the condition A3 < A4, the change in the optical path at the third side face 133 is more remarkable, so that the light irradiation range is widened toward the third side face 133. The narrow-angle planar lens 1 refracts and reflects the light path through the vertical surface 112, the arched surface 111 and the asymmetric side ring surface 13, and the light with changed light path is emitted from the light emitting surface 122 to form a corresponding irradiation range, so that the problem of small visible area of light distribution of the light is solved, and the effect that the irradiation range of the light is enlarged on one side of the narrow-angle planar lens 1 is achieved.

In the present embodiment, the arched surface 111 is a curved surface, the arched surface 111 has an arc shape protruding from the light-emitting surface 122 toward the opening surface 117 in the direction of the section along ii-ii, and the arched surface 111 has a straight shape in the direction of the section along iii-iii. The vertical face 112 is cylindrical formed by surrounding a trapezoid plane. The arched surface 111 and the vertical surface 112 enclose a concave open cavity, the arched surface 111 is arranged at the bottom of the concave cavity, and the arched surface 111 is arranged between the open surface 117 and the light-emitting surface 122. Light enters the narrow angle planar lens 1 from the outside of the arcuate surface 111 and the vertical surface 112, and is refracted at the dielectric surfaces of the arcuate surface 111 and the vertical surface 112. When the refracted light enters the narrow-angle planar lens 1, the light path is divided into two parts, one part of the light refracted by the arched surface 111 and the other part of the light refracted by the vertical surface 112.

The light refracted by the arched surface 111, because the arched surface 111 is disposed in the middle of the concave cavity, and the arched surface 111 protrudes from the side of the light-emitting surface 122 where the side of the opening surface 117 is located, the arched surface 111 has the characteristics of a convex lens, the light path entering the arched surface 111 refracts towards the middle, the refracted light cannot irradiate the side annular surface 13, and the refracted light directly emits the narrow-angle planar lens 1 from the light-emitting surface 122.

The light refracted by the vertical surface 112 irradiates the first side 131, the second side 132, the third side 133 and the fourth side 134, and the light is reflected on the surfaces of the respective sides due to the relationship between the medium density and the irradiation angle of the narrow angle planar lens 1, the optical path is changed again, and the reflected light is emitted from the light emitting surface 122 to the narrow angle planar lens 1. The narrow angle planar lens 1 is made of polymethyl methacrylate or polycarbonate materials, and the narrow angle planar lens 1 with the refractive index of 1.585 is made of organic glass or plexiglass. When the incident angle of the light on the surface of the side ring surface 13 is greater than or equal to 39 ° of the critical angle, the light is totally reflected on the surface of the side ring surface 13, and no refracted light is emitted from the side ring surface 13. The totally reflected light exits the narrow angle planar lens 1 from the light exit surface 122.

Because the angles between the third side surface 133 and the fourth side surface 134 and the light-emitting surface 122 satisfy the condition A3 < A4 and are acute angles, the light path deflects in the directions of the third side surface 133 and the fourth side surface 134, the smaller the angle is, the larger the deflection degree is, the smaller the angle between the third side surface 133 and the light-emitting surface 122 is, and the condition A3 < A4 is satisfied, so that the light irradiation range is enlarged to the third side surface 133.

The narrow angle planar lens 1 is provided with the vertical surface 112 and the arched surface 111, and is combined with the third side surface 133 and the fourth side surface 134 to be asymmetric, so that the light path is refracted between the vertical surface 112 and the arched surface 111, the refracted light beam on the vertical surface 112 is directed to the lateral annular surface 13, the light path of the refracted light beam is totally reflected on the third side surface 133 and the fourth side surface 134, the light beam with the changed light path is emitted from the light emitting surface 122, and the illumination range is correspondingly enlarged to the third side surface 133.

In one possible embodiment:

the angle between the first side surface 131 and the light-emitting surface 122 is A1, the angle between the second side surface 132 and the light-emitting surface 122 is A2, and the condition a1=a2 is satisfied.

Further, when the light is reflected by the side ring surface 13, since the first side surface 131 and the second side surface 132 satisfy the condition a1=a2, the degree of deflection of the light path between the first side surface 131 and the second side surface 132 is consistent, so that the light irradiation range is uniformly symmetrical between the directions of the first side surface 131 and the second side surface 132. The narrow angle plane lens 1 makes the light path change uniformly by arranging the symmetrical first side surface 131 and the symmetrical second side surface 132, thereby solving the problem of uneven light spots and achieving the effect that the light irradiation range is uniformly distributed on the symmetrical side of the narrow angle plane lens 1.

In the present embodiment, the first side surface 131 and the second side surface 132 are symmetrically disposed, and the angles between the first side surface 131 and the second side surface 132 and the light-emitting surface 122 are equal and acute. The light refracted by the vertical face 112 irradiates the side ring surface 13, the refracted light is totally reflected on the side ring surface 13, and the deflection angle of the reflected light is symmetrical in the directions of the first side surface 131 and the second side surface 132. The light rays with changed light paths are emitted from the light emitting surface 122, and the illumination ranges are uniformly distributed on the first side surface 131 and the second side surface 132 correspondingly.

Fig. 4 is a schematic perspective view of a narrow angle planar lens 1 according to another embodiment of the present application;

in one possible embodiment: the side ring surface 13 further includes an extension surface 135, the extension surface 135 is connected to the opening surface 117, the second end surface 12 further includes a step surface 121, the step surface 121 is connected to the light-emitting surface 122, one side of the first side surface 131, the second side surface 132, the third side surface 133 and the fourth side surface 134 is connected to the extension surface 135, the other side of each side surface is connected to the step surface 121, each side surface is bent to the step surface 121 by the extension surface 135, and each side surface protrudes outward from the center of the arch surface 111.

Further, the refracted light beam passing through the vertical face 112 is directed to the side annular surface 13, the refracted light beam is reflected on the side annular surface 13, the incident angle of the reflected light beam gradually increases from the middle to the two sides of the side annular surface 13, and the reflection angle of the reflected light beam increases as the reflection angle approaches to the two sides. The side ring surface 13 has an outward convex shape, so that the variation trend of the incident angle of the light is gradually reduced, and the corresponding variation trend of the reflection angle is also gradually reduced, thereby playing a role in gathering the reflection angle of the light toward the middle. The light reflected by the side ring surface 13 is emitted from the light emitting surface 122, and the portion of the illumination range near the outer side edge has a corresponding tendency to be folded toward the middle. Therefore, the problem that light distribution is too concentrated is solved, light is properly folded, and the effect that the light irradiation range is folded towards the middle of the narrow-angle plane lens 1 is achieved.

In this embodiment, the extension surface 135 is a plane that starts from the opening surface 117 and extends vertically downward. The extended surface 135 is located at the opposite position of the light, and the light refracted into the narrow angle planar lens 1 through the elevation 112 cannot strike the extended surface 135. A certain thickness is provided between the step surface 121 and the light-emitting surface 122. The first side 131, the second side 132, the third side 133 and the fourth side 134 are provided between the step surface 121 and the extension surface 135, one side of each side is connected to the step surface 121, and the other side is connected to the extension surface 135. The first side 131, the second side 132, the third side 133 and the fourth side 134 are outwardly convex, and each side is convex in a range between the extension surface 135 and the step surface 121. The first side surface 131, the second side surface 132, the third side surface 133, and the fourth side surface 134 may be curved surfaces, the curvature centers of which are provided inside the narrow angle planar lens 1, and the side surfaces may be curved surfaces, and the curved direction of the curved surfaces may be directed toward inside the narrow angle planar lens 1. The light is refracted into the side ring surface 13 through the vertical surface 112, the refracted light is reflected on the side ring surface 13, the incident angle of the reflected light is gradually increased from the middle to two sides by arranging the side ring surface 13, and the change trend of the incident angle is gradually reduced due to the outwards convex shape of the side ring surface 13, so that the effect of gathering the reflected angle towards the middle is achieved.

In one possible embodiment:

the thickness between the arched surface 111 and the light-emitting surface 122 is thick in the middle, and both sides are uniformly thinned, and the part between the arched surface 111 and the light-emitting surface 122 has a convex lens structure.

Further, the arched surface 111 is a convex arched surface with a central portion protruding toward the opening surface 117, and other portions bent downward from the central portion toward the light-emitting surface 122. In this way, the narrow angle planar lens 1 has a structure in which the middle thick edge is thin from the light exit surface 122 to the arched surface 111. So that this part has the effect of a convex lens, and the refracted ray has a tendency to concentrate toward the middle in the directions of the first side 131 and the second side 132. Therefore, the problems of too concentrated light distribution and uneven light spots are solved, the light of the arched surface 111 in the middle part is properly gathered, and the effects of improving the brightness of the refracted light and making the light spots uniform are achieved.

In the present embodiment, the arched surface 111 has a convex shape in the direction of the first side 131 and the second side 132, and the arched surface 111 has a flat shape in the direction of the third side 133 and the fourth side 134. The light refracted by the arched surface 111 converges toward the middle in the directions of the first side 131 and the second side 132, and diverges toward both sides in the directions of the third side 133 and the fourth side 134. The light entering the narrow-angle plane lens 1 through the arched surface 111, the convex shape of the arched surface 111 enables the light to play a role of a convex lens in the refraction process, and the refracted light is emitted from the light emitting surface 122, so that the gathered light spots of the refracted light are uniform, and the illumination brightness is improved.

In one possible embodiment:

the elevation 112 comprises a first plane 113, a second plane 114, a third plane 115 and a fourth plane 116, the first plane 113 and the second plane 114 are arranged oppositely, the third plane 115 and the fourth plane 116 are arranged oppositely, the four planes are connected in sequence, and a light path of light incident through the elevation 112 is refracted to the side annular surface 13.

Further, the vertical surface 112 of the narrow angle planar lens 1 is provided with a first plane 113, a second plane 114, a third plane 115 and a fourth plane 116, respectively, each of which corresponds to the side annular surface 13. The first plane 113 is disposed opposite the first side 131, and similarly, the fourth plane 116 is disposed opposite the fourth side 134. The light entering from the narrow angle planar lens 1 is refracted by the vertical surface 112, the corresponding refraction of the light is carried out on the side annular surface 13, the refracted light is reflected by the side annular surface 13, the light path of the light is changed, the reflection angle of the reflected light is increased towards the periphery of the narrow angle planar lens 1, the reflected light is emitted from the periphery of the light emitting surface 122, and the irradiation range of the reflected light is enlarged towards the periphery. Therefore, the problem of small visible area of light distribution is solved, and the effect of expanding the light irradiation range is achieved.

In this embodiment, the elevation 112 is disposed at the peripheral position of the arched surface 111, a part of the light refracted by the arched surface 111 is directly emitted from the middle of the light emergent surface 122, another part of the light refracted by the elevation 112 is directed to the lateral annular surface 13, then the refracted light is reflected by the lateral annular surface 13, and the reflected light is emitted from the edge region of the light emergent surface 122. The vertical surface 112 is provided with a first plane 113, a second plane 114, a third plane 115 and a fourth plane 116 at the periphery of the arched surface 111, the four planes are respectively opposite to the side annular surface 13, and the light refracted by the vertical surface 112 is respectively directed to the side annular surface 13. The light emitted to the side annular surface 13 is reflected, and the reflected light is emitted from the periphery of the light emitting surface 122. The light emitted from the periphery expands the light irradiation range from the middle to the periphery, thereby expanding the light irradiation range of the narrow angle planar lens 1.

In one possible embodiment:

the vertical face 112 and the opening surface 117 form an obtuse included angle, the included angle between the first plane 113 and the opening surface 117 is B1, the included angle between the second plane 114 and the opening surface 117 is B2, the included angle between the third plane 115 and the opening surface 117 is B3, the included angle between the fourth plane 116 and the opening surface 117 is B4, and the conditions b1=b2, b3=b4, B1 < B3 are satisfied for increasing the light inlet amount of the third plane 115 and the fourth plane 116.

Further, by setting the vertical face 112 and the opening face 117 at an obtuse angle, the area of the vertical face 112 irradiated by the light is increased, and the light received by the vertical face 112 is increased, so that the light entering the vertical face 112 is increased. The included angle between the vertical face 112 and the opening surface 117 is an obtuse angle, and the larger the included angle is, the more light rays are received by the vertical face 112, so that the higher the illumination intensity is. The condition B1=B2 and B3=B4 are met, and the light enters the same quantity at two symmetrical sides, so that the illumination intensity is uniformly and symmetrically distributed; the conditions B1 < B3 and B2 < B4 are satisfied, and the areas of the third plane 115 and the fourth plane 116 irradiated with light are larger than the areas of the first plane 113 and the second plane 114, so that the light quantity of the third plane 115 and the fourth plane 116 is increased, and the illumination intensity in the directions of the third plane 115 and the fourth plane 116 is increased. Therefore, the problem that light distribution is too concentrated is solved, and the effect of uniformly increasing the light irradiation intensity is achieved.

In the present embodiment, the total light entering amount is constant, and the light is irradiated to the narrow angle planar lens 1, and a part of the light enters the narrow angle planar lens 1 from the arched surface 111, and another part of the light enters the narrow angle planar lens 1 from the vertical surface 112. By setting the angle between the vertical face 112 and the opening face 117, the light entering the arched face 111 and the vertical face 112 is adjusted, and the more the light entering amount is, the higher the illumination intensity of the corresponding part is. When the included angle between the vertical surface 112 and the opening surface 117 is larger, the more light is received by the vertical surface 112, the light is correspondingly reduced by the arched surface 111, so that the light irradiation intensity is increased in the peripheral range, and the corresponding light irradiation intensity is reduced in the middle range. Conversely, the smaller the angle between the vertical surface 112 and the opening surface 117, the less light the vertical surface 112 receives, and the correspondingly increased light the arched surface 111 receives, so that the light irradiation intensity is weakened in the peripheral range, and the corresponding light irradiation intensity is increased in the middle range. The vertical plane 112 is divided into a first plane 113, a second plane 114, a third plane 115 and a fourth plane 116, and satisfies the conditions b1=b2, b3=b4, so that the light is uniformly and symmetrically distributed at the same light quantity at two symmetrical sides. The conditions B1 < B3, B2 < B4 are satisfied, so that the areas of the third plane 115 and the fourth plane 116 irradiated by the light rays are larger than the areas of the first plane 113 and the second plane 114, thereby increasing the light quantity of the third plane 115 and the fourth plane 116, the increased light rays are refracted through the third plane 115 and the fourth plane 116, the refracted light rays are irradiated to the lateral annular surface 13, the increased light rays are reflected through the lateral annular surface 13, and the increased reflected light rays are emitted from the light emitting surface 122, so that the light irradiation intensity is increased in the directions of the third side surface 133 and the fourth side surface 134.

In one possible embodiment:

the narrow angle planar lens 1 is matched with a light source 14, the opening surface 117, the vertical surface 112 and the arched surface 111 are enclosed to form a concave cavity, and the light source 14 is arranged in the concave cavity.

Further, by providing a concave cavity, a position where the light source 14 is provided, the narrow angle planar lens 1 is used in cooperation with the light source 14. Therefore, the problems that the light source 14 passes through the narrow angle plane lens 1, the illumination is too concentrated, the light spots are uneven, the visible area is small and the like are solved, and the effect of light distribution of the narrow angle plane lens 1 is achieved.

In the present embodiment, the relative positional relationship between the light source 14 and the narrow angle planar lens 1 is set, and the initial position of the light emitted by the light source 14 is set, so as to adjust the angle and the light incoming amount of the light source 14 entering the narrow angle planar lens 1. The narrow angle planar lens 1 is provided with a concave cavity, the light source 14 is arranged in the concave cavity, and the light source 14 emits light rays towards the direction of the light emitting surface 122, so that all the light rays of the light source 14 enter the narrow angle planar lens 1. The light refracted by the vertical face 112 of the narrow-angle planar lens 1 is directed to the side annular surface 13 and reflected by the side annular surface 13, the reflected light is emitted from the light emitting surface 122, the emitted light expands toward the third side surface 133, and the light is uniformly distributed on the first side surface 131 and the second side surface 132. The light refracted by the arched surface 111 of the narrow angle planar lens 1 is directed to the light emitting surface 122, and is directly emitted from the light emitting surface 122, so that the light is collected in the middle. The narrow angle planar lens 1 causes the light source 14 to form a specific irradiation range and irradiation intensity.

In one possible embodiment:

the narrow angle planar lens 1 is used in combination with a light source 14, the connection between the first side 131, the second side 132, the third side 133, the fourth side 134 and the extension surface 135 is a connection edge 136, and the light source 14 is disposed between the plane where the connection edge 136 is located and the plane where the opening surface 117 is located.

Further, by disposing the light source 14 between the plane of the connecting edge 136 and the plane of the opening surface 117, the light starting position is controlled between the plane of the connecting edge 136 and the plane of the opening surface 117, so that all the light of the light source 14 enters the vertical surface 112 and the arched surface 111. Therefore, the problems that the light source 14 passes through the narrow angle plane lens 1, the illumination is too concentrated, the light spots are uneven, the visible area is small and the like are solved, and the effect of light distribution of the narrow angle plane lens 1 is achieved.

In the present embodiment, the relative position relationship between the vertical surface 112 and the arched surface 111 of the light source 14 is set, and the initial position of the light emitted by the light source 14 is set, so as to adjust the angle and the light incoming amount of the light from the light source 14 entering the vertical surface 112 and the arched surface 111. The light source 14 is disposed between the plane of the connecting edge 136 and the plane of the opening 117, and the light source 14 emits light toward the vertical surface 112 and the arched surface 111, so that all the light of the light source 14 enters the vertical surface 112 and the arched surface 111. The light refracted by the arched surface 111 is directed to the light emitting surface 122, and the refracted light is directly emitted from the light emitting surface 122, so that the light is gathered towards the middle. The refracted light beam passing through the vertical face 112 is directed to the side annular surface 13, and then reflected by the side annular surface 13, and the reflected light beam is emitted from the light emitting surface 122, so that the light beam expands towards the third side surface 133, and the light beam is uniformly distributed on the first side surface 131 and the second side surface 132. The narrow angle planar lens 1 causes the light source 14 to form a specific irradiation range and irradiation intensity.

In one possible embodiment:

the light emitted by the light source 14 is refracted to the side ring surface 13 through the vertical surface 112, the incident angle of the light on the side ring surface 13 is alpha, the condition alpha is more than or equal to 39 degrees, and the light is totally reflected on the side ring surface 13.

Further, by setting the position of the light source 14, according to the physical properties of the material of the narrow-angle planar lens 1 and the refraction angle of the light in the vertical face 112, the incident angle of the refracted light entering the lateral annular surface 13 is alpha, and the incident angle is greater than or equal to the critical angle of the narrow-angle planar lens 1, so that the condition that alpha is greater than or equal to 39 degrees is satisfied, and the light is totally reflected in the lateral annular surface 13. Therefore, the problem of uneven light distribution of the light is solved, the light is totally reflected in the narrow-angle plane lens 1, and the effect of avoiding the light from refracting out of the lens at the side ring surface 13 and avoiding the light intensity attenuation is achieved.

In the present embodiment, the narrow angle planar lens 1 is made of polymethyl methacrylate or polycarbonate material, and the narrow angle planar lens 1 having a refractive index of 1.585 of plexiglass or plexiglass is made of these materials. The light source 14 emits light toward the vertical face 112 and the arched face 111, so that all the light of the light source 14 enters the vertical face 112 and the arched face 111. Wherein refracted light rays passing through the facade 112 are directed towards the lateral annulus 13. The side ring surface 13 is made of transparent material, when the incident angle of the light on the surface of the side ring surface 13 is greater than or equal to 39 degrees, the light is totally reflected on the surface of the side ring surface 13, and no refracted light is emitted from the side ring surface 13. The light totally reflected by the side ring surface 13 is emitted from the light emitting surface 122 to the narrow angle planar lens 1.

Fig. 5 is a schematic perspective view of a lighting fixture 2 according to another embodiment of the present application.

In one possible embodiment:

the lighting lamp 2 comprises a lamp shade 21 and a narrow-angle plane lens 1, wherein the lamp shade 21 is arranged on the second end face 12, and the lamp shade 21 is fixedly connected with the narrow-angle plane lens 1.

Further, through setting up the fixed multiunit narrow angle plane lens 1 of lamp shade 21, the whole grading of light of multiunit narrow angle plane lens 1 solves the illumination lamps and lanterns 2 and shines too concentrated, and the facula is uneven, and the visible area is little scheduling problem, satisfies the requirement of using illumination lamps and lanterns 2 under the different environment to reach the effect of great illumination scope and illumination intensity.

In the present embodiment, the position where the narrow angle planar lens 1 is placed is set according to the occasion of using the illumination lamp 2. If used in a tunnel, the illumination lamp 2 is suspended at the top of the tunnel, the light exit surface 122 is disposed parallel to the road surface, the direction in which the third side surface 133 and the fourth side surface 134 are disposed is set to be the direction in which the road surface extends, and the third side surface 133 is disposed toward the direction in which the vehicle travels, so that the light line is extended toward the third side surface 133, and the illumination range is extended toward the direction in which the vehicle travels. Since the light is uniformly distributed on the first side 131 and the second side 132, the corresponding illumination ranges are uniformly distributed on both sides of the vehicle running. Since the light is collected in the middle and the light irradiation intensity increases in the directions of the middle, the third side 133 and the fourth side 134, the corresponding light irradiation range is collected in the central road, and the light irradiation intensity of the central road increases. Thereby meeting the requirements of the lighting fixtures 2 for use in tunnels. If the lens is used in other public places, the direction and the position of the narrow-angle plane lens 1 are set according to different environmental requirements.

Fig. 6 is a schematic view of the light field of the narrow angle planar lens 1 of fig. 1 in combination with the light source 14.

The lateral annular surface 13 of the narrow angle planar lens 1 is symmetrically arranged on the first side 131 and the second side 132, and the light rays are uniformly distributed on the first side 131 and the second side 132. The illumination ranges and the illumination intensities are symmetrically and uniformly distributed on both sides of the axis of 90-270 degrees in fig. 6. The lateral annular surface 13 of the narrow angle planar lens 1 is asymmetrically disposed on the third side surface 133 and the fourth side surface 134, such as on both sides of the axis of 0-180 ° in fig. 6, and the illumination range and the illumination intensity are asymmetrically distributed. Since the third side face 133 and the fourth side face 134 satisfy the condition A3 < A4, the change of the optical path at the third side face 133 is more remarkable, so that the light irradiation range is expanded toward the third side face 133, and the third side face 133 has an expanding effect on the irradiation range on the left side of the axis of 0-180 ° in fig. 6.

Fig. 7 is a schematic view of a light distribution curve of the narrow angle planar lens 1 of fig. 1 in combination with the light source 14.

The lateral annular surface 13 of the narrow angle planar lens 1 is asymmetrically disposed on the third side surface 133 and the fourth side surface 134, and since the third side surface 133 and the fourth side surface 134 satisfy the condition A3 < A4, the light path changes more significantly on the third side surface 133, thereby enlarging the light irradiation range toward the third side surface 133, and the profile of the light is inclined and enlarged toward the left side of the 0 ° axis in fig. 7. The light beam profile is expanded from the normal first beam 141 profile range of 0 to 40 ° to the deflected second beam 142 profile range of 0 to 50 ° through the third side 133, and the light beam profile is expanded to about 10 ° toward the third side 133. The light distribution curve of the narrow-angle plane lens 1 forms a narrow-angle front polishing pattern, and accords with the design of a road surface. After the light is emitted through the narrow-angle plane lens 1, the irradiation range of the light is thrown forward in the running direction of the road vehicle.

The above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present application.

Claims (10)

1. The utility model provides a narrow angle plane lens, includes first terminal surface and second terminal surface, first terminal surface includes the opening surface, facade and arch face, the opening surface with the arch face passes through the facade is connected, the second terminal surface includes the light-emitting surface, the arch face is located the opening surface with between the light-emitting surface, the arch face is by the light-emitting surface place side the protruding formation of one side place of opening surface place, its characterized in that still includes:

the side ring surface is arranged between the first end face and the second end face, the side ring surface and the light emitting surface are arranged at an acute angle, the side ring surface comprises a first side face, a second side face, a third side face and a fourth side face, the first side face and the second side face are oppositely arranged, the third side face and the fourth side face are oppositely arranged, the four side faces are sequentially connected, the angle between the third side face and the light emitting surface is A3, the angle between the fourth side face and the light emitting surface is A4, and the condition A3 & lt A4 is met, so that the light irradiation range is expanded to the third side face.

2. The narrow angle planar lens of claim 1, wherein:

the included angle between the first side face and the light-emitting face is A1, the included angle between the second side face and the light-emitting face is A2, and the condition A1=A2 is met.

3. The narrow angle planar lens of claim 1, wherein:

the side ring surface further comprises an extension surface, the extension surface is connected with the opening surface, the second end surface further comprises a step surface, the step surface is connected with the light emitting surface, one side of the first side surface, one side of the second side surface, one side of the third side surface and one side of the fourth side surface are connected with the extension surface, the other side of each side surface is connected with the step surface, each side surface is bent to the step surface by the extension surface, and each side surface protrudes outwards from the center of the arched surface.

4. The narrow angle planar lens of claim 1, wherein:

the thickness between the arch surface and the light-emitting surface is thick in the middle, the two sides of the arch surface are uniformly thinned, and the part between the arch surface and the light-emitting surface is provided with a convex lens structure.

5. The narrow angle planar lens of claim 1, wherein:

the facade comprises a first plane, a second plane, a third plane and a fourth plane, wherein the first plane and the second plane are oppositely arranged, the third plane and the fourth plane are oppositely arranged, the four planes are sequentially connected, and a light path of light incident through the facade is refracted to the side ring surface.

6. The narrow angle planar lens of claim 5, wherein:

the facade with the obtuse angle contained angle setting is personally submitted to the opening, first plane with the contained angle of opening is B1, the second plane with the contained angle of opening is B2, the third plane with the contained angle of opening is B3, the fourth plane with the contained angle of opening is B4, satisfies condition B1=B2, B3=B4, and B1 < B3 is used for increasing the third plane with the light inlet of fourth plane.

7. The narrow angle planar lens of claim 1, wherein:

the narrow-angle plane lens is matched with a light source for use, the opening face, the vertical face and the arched face are enclosed to form a concave cavity, and the light source is arranged in the concave cavity.

8. A narrow angle planar lens according to claim 3, wherein:

the narrow-angle plane lens is matched with a light source, the connection parts of the first side face, the second side face, the third side face and the fourth side face and the extension face are connection edges, and the light source is arranged between the plane where the connection edges are located and the plane where the opening face is located.

9. The narrow angle planar lens of claim 8, wherein:

the light emitted by the light source is refracted to the side ring surface through the vertical surface, the incident angle of the light on the side ring surface is alpha, the condition alpha is more than or equal to 39 degrees, and the light is totally reflected on the side ring surface.

10. A lighting fixture, comprising:

the lamp shade and the narrow angle planar lens as claimed in any one of claims 1 to 9, wherein the lamp shade is arranged on the second end face, and the lamp shade is fixedly connected with the narrow angle planar lens.