CN213777411U - Lens structure capable of freely distributing light within 48 degrees and wall washer - Google Patents
Lens structure capable of freely distributing light within 48 degrees and wall washer Download PDFInfo
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- CN213777411U CN213777411U CN202022836277.1U CN202022836277U CN213777411U CN 213777411 U CN213777411 U CN 213777411U CN 202022836277 U CN202022836277 U CN 202022836277U CN 213777411 U CN213777411 U CN 213777411U
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Abstract
The application relates to a lens structure and wall washer lamp of grading freely in 48 degrees, lens structure that can grading freely in 48 degrees can realize all freely grading in 0 degree to 48 degrees angle ranges on XOZ face and XOY two faces, and the angle of grading is accurate.
Description
Technical Field
The application relates to the technical field of lamp lenses, in particular to a lens structure capable of freely distributing light within 48 degrees and a wall washer.
Background
The wall washing lamp is also called a linear LED projection lamp, and is also called an LED line lamp by some because the wall washing lamp is in a strip shape. The wall washing lamp is mainly used for decoration and illumination of buildings and used for outlining large buildings as light passes through a wall surface like water, and is widely used due to the characteristics of energy conservation, high lighting effect, rich colors, long service life and the like. In order to achieve different light emitting angles, wall washing lamps are generally provided with lens structures with different-angle light distribution functions.
The traditional lens structure is generally obtained by rotating around a vertical shaft, so that light distribution at different angles can be carried out only on one spatial dimension, and light distribution at different angles cannot be carried out from different spatial dimensions.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to solve the problem that the conventional lens structure capable of freely distributing light within 48 degrees can only distribute light at different angles in one spatial dimension, it is necessary to provide a lens structure capable of freely distributing light within 48 degrees.
The application provides a lens structure that can freely distribute light within 48 degrees, includes:
the TIR lens is arranged into an axisymmetric body in a bowl shape, the top of the TIR lens is a plane which is used as the bottom surface of the TIR lens; the bottom of the TIR lens is provided with a convex pit which is close to the bottom surface of the lens to form a lens refraction surface; the side wall surface of the TIR lens is a lens reflecting surface; when the lens structure capable of freely distributing light within 48 degrees is placed in a three-dimensional rectangular coordinate system, the circle center of the bottom surface of the lens is taken as the origin of coordinates, the extending direction of a straight line passing through the circle center and perpendicular to the bottom surface of the lens is taken as the X-axis direction, and the extending directions of two mutually perpendicular diameters passing through the circle center are respectively taken as the Z-axis direction and the Y-axis direction;
the array structure comprises a plurality of array units, and the array units are arranged on the bottom surface of the lens in a matrix manner; each array unit comprises an array unit bottom surface and an array unit curved surface, and the array unit bottom surface is fixedly connected with the lens bottom surface;
after the light rays are emitted from the curved surface of each array unit, the included angles between the emergent light rays and the OX axis on the XOZ plane and the XOY plane belong to the angle range from 0 degree to 48 degrees.
Further, the array units are paved on the bottom surface of the lens, so that the shape of the bottom surface of the array structure formed by the array units is the same as that of the bottom surface of the lens; the bottom surface of the lens is circular in shape.
Further, the array structure comprises a plurality of array unit rows, and each array unit row is formed by arranging a plurality of array units with the same structure in parallel along the direction parallel to the OZ axis; the structure of the array unit is different between different array unit rows.
Further, the cross-sectional pattern of the array unit on the XOZ plane is a closed pattern formed by enclosing an arc line, a straight line perpendicular to the OZ axis and the OZ axis.
Furthermore, the cross-sectional pattern of the array structure on the XOZ plane is a pattern formed by arranging a plurality of array units with different shapes in parallel along the OY axis.
Furthermore, the cross-sectional pattern of the array unit on the XOY plane is a closed pattern formed by a circular arc, two line segments passing through two end points of the circular arc and perpendicular to the OY axis and the OY axis.
Further, the curved surface of the array unit is formed by rotating an arc line of the array unit in a cross-sectional graph of the XOZ surface by taking an OZ axis as a rotating axis.
Furthermore, the included angle between the light ray emitted from the curved surface of the array unit of each array unit and the OX axis on the XOZ surface meets the formula 1;
wherein, thetaiThe angle between the light ray emitted from the curved surface of the array unit of one array unit and the OX axis on the XOZ surface is shown as the angle, i is the serial number of the array unit, and i is 1, 2, 3Number, QiIs thetaiSet of affiliations, QσIn order to be a target set of objects,
is thetaiThe minimum value of (a) is determined,
is thetaiIs measured.
Further, the array structure is integrally formed with the TIR lens.
The application also provides a wall washer. The wall washer lamp comprises a plurality of lens structures which can freely distribute light within 48 degrees as mentioned in the foregoing.
The application relates to a lens structure and wall washer lamp of grading freely in 48 degrees, lens structure that can grading freely in 48 degrees can realize all freely grading in 0 degree to 48 degrees angle ranges on XOZ face and XOY two faces, and the angle of grading is accurate.
Drawings
Fig. 1 is a schematic structural diagram of a lens structure capable of freely distributing light within 48 degrees according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating an angle after a lens structure capable of freely distributing light within 48 degrees is placed in a three-dimensional rectangular coordinate system according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating another angle after a lens structure capable of freely distributing light within 48 degrees is placed in a three-dimensional rectangular coordinate system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a lens structure capable of freely distributing light within 48 degrees according to an embodiment of the present application;
fig. 5 is a schematic light distribution diagram of an array unit in an XOZ plane in a lens structure capable of freely distributing light within 48 degrees according to an embodiment of the present application;
fig. 6 is a schematic light distribution diagram of an array unit on an XOY plane in a lens structure capable of freely distributing light within 48 degrees according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an array unit on an XOY plane without a semicircular arc truncation process in a lens structure capable of freely distributing light within 48 degrees according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an array unit on an XOY plane after a half-arc truncation process in a lens structure capable of freely distributing light within 48 degrees according to an embodiment of the present application;
fig. 9 is an absolute value D of an abscissa of a reference point of an array unit on an XOZ plane in a lens structure capable of freely distributing light within 48 degrees according to an embodiment of the present applicationiA schematic diagram of (a);
FIG. 10 shows a lens structure capable of freely distributing light within 48 degrees, Di、LiThe relationship between R and R is shown schematically;
fig. 11 is a diagram illustrating a height H of an array unit in an XOZ plane in a lens structure capable of freely distributing light within 48 degrees according to an embodiment of the present disclosureiSchematic in the XOZ plane;
fig. 12 shows a lens structure capable of freely distributing light within 48 degrees, in which an array unit is in an XOY plane, Wi、
And HiSchematic diagram of the relationship of (1).
Reference numerals:
10-TIR lens; 110-lens bottom surface; 120-a lens refractive surface; 130-a lens reflective surface;
20-array structure; 210-array unit; 211-array unit bottom surface; 212-array element curved surface;
220-array element row
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The application provides a lens structure capable of freely distributing light within 48 degrees. It should be noted that the lens structure capable of freely distributing light within 48 degrees provided by the present application can be applied to a wall washer.
As shown in fig. 1, in an embodiment of the present application, the lens structure capable of freely distributing light within 48 degrees includes a TIR lens 10 and an array structure 20. The TIR lens 10 is fixedly connected to the array structure 20.
The TIR lens 10 is arranged as an axisymmetric body in the shape of a bowl. The top of the TIR lens 10 is a flat surface, and this flat surface serves as the lens bottom surface 110. The bottom of the TIR lens 10 is provided with raised pits near the lens bottom surface 110 to form a lens refracting surface 120. The side wall surface of the TIR lens 10 is a lens refractive surface 130. When the lens structure capable of freely distributing light within 48 degrees is placed in a three-dimensional rectangular coordinate system, the center of the circle of the bottom surface 110 of the lens is the origin of coordinates. The extension direction of a straight line passing through the center of the circle and perpendicular to the lens bottom surface 110 is the X-axis direction. The extending directions of the two mutually perpendicular diameters passing through the circle center are respectively the Z-axis direction and the Y-axis direction.
The array structure 20 includes a plurality of array cells 210. The array units 210 are arranged in a matrix on the lens bottom surface 110. Each array cell 210 includes an array cell bottom surface 211 and an array cell curved surface 212. The array unit bottom surface 211 is fixedly connected to the lens bottom surface 110.
After the light rays are emitted from each array unit curved surface 212, the included angles between the emitted light rays and the OX axis on the XOZ plane and the XOY plane belong to the angle range from 0 degree to 48 degrees.
Specifically, the TIR lens 10 includes a lens bottom surface 110, a lens refractive surface 120, and a lens refractive surface 130. The TIR lens 10 has the property that the light rays exiting the TIR lens 10 are all straight lines parallel to each other and oriented parallel to the vertical. As shown in fig. 1, light emitted from the point light source enters the lens refracting surface 120, is refracted, is emitted to the lens bottom surface 110 as a straight line parallel to the vertical line, and is emitted from the lens bottom surface 110 to the array structure 20 with the direction unchanged. When a light ray located inside the TIR lens 10 is irradiated to the lens refracting surface 130, the light ray does not exit the TIR lens 10, but is totally reflected on the lens refracting surface 130, and is still reflected to a straight line parallel to the vertical line toward the lens bottom surface 110.
Further, the straight line parallel to the vertical line continues to strike the curved surface 212 of the array unit and refracts, so that the emergent ray exiting the curved surface 212 of the array unit forms an angle with the axis OX or the straight line parallel to the axis OX. The curved surface 212 of the array element can make the included angle between the emergent ray and the OX axis on the XOZ plane and the XOY plane fall within the range of 0-48 degrees.
The schematic diagram of the lens structure capable of freely distributing light within 48 degrees placed in a three-dimensional rectangular coordinate system is shown in fig. 2 and 3.
In this embodiment, the lens structure capable of freely distributing light within 48 degrees can realize freely distributing light within an angle range from 0 degree to 48 degrees on both the XOZ plane and the XOY plane, and the angle of light distribution is accurate.
As shown in fig. 2, in an embodiment of the present application, the plurality of array units 210 cover the bottom surface 110 of the lens, so that the bottom surface of the array structure 20 formed by the plurality of array units 210 has the same shape as the bottom surface 110 of the lens. The lens bottom surface 110 is circular in shape.
Specifically, as shown in fig. 2, a plurality of array units 210 are spread over the bottom surface 110 of the lens, it can be understood that the bottom surface of the array structure 20 may have the same shape as the bottom surface 110 of the lens, so that the TIR lens 10 and the array structure 20 may be firmly connected, and at the same time, light emitted from the TIR lens 10 to the array structure 20 is prevented from completely irradiating the array structure 20, and no light leakage occurs.
As shown in fig. 4, in an embodiment of the present application, the array structure 20 includes a plurality of array unit rows 220. Each array unit row 220 is formed by arranging a plurality of array units 210 having the same structure in parallel. The arrangement direction is along the direction parallel to the OZ axis. The structure of the array cells 210 differs between different rows 220 of array cells.
Specifically, since the bottom surface of the array structure 20 is circular in shape, the number of array cells 210 included in each array cell row 220 may not be equal. And a portion of the array unit 210 beyond the edge of the lens bottom surface 110 needs to be removed to ensure that the bottom surface of the array structure 20 is circular in shape. As shown, it can be seen that some array elements 210 have only a portion of the overall array element 210 structure at the edge portion of the lens bottom surface 110, rather than being complete.
In the present embodiment, by providing a plurality of array cell rows 220, each array cell row 220 includes a plurality of array cells 210 having the same structure. The structure of the array units 210 is different between different array unit rows 220, so that the structure of the whole array structure 20 is simple, and free light distribution in an angle range of 0 degree to 48 degrees can be realized on both an XOZ plane and an XOY plane.
In an embodiment of the present application, the cross-sectional pattern of the array unit 210 in the XOZ plane is a closed pattern. The closed figure is formed by enclosing an arc line, a straight line which is vertical to an OZ axis and the OZ axis.
Specifically, as shown in fig. 5, the XOZ plane may be understood as a side view of the array structure 20, and may be understood as a side view of a plurality of array unit rows 220. Each cross-sectional view is a side view of one row 220 of array elements. The structure of the array elements 210 varies from row 220 to row, and it will be appreciated that the shapes of the various cross-sectional patterns may vary, particularly the arc of the arc between the different cross-sectional patterns.
In this embodiment, the closed graph is formed by enclosing an arc line, a straight line perpendicular to the OZ axis, and the OZ axis, so that the array unit curved surface 212 is displayed as an arc line on the XOZ surface, light is emitted to different positions of the array unit curved surface 212, and different refraction points have different exit angles and diversity.
In an embodiment of the present application, a cross-sectional pattern of the array structure 20 on the XOZ plane is a pattern formed by arranging a plurality of array units 210 with different shapes in parallel along the OY axis.
Specifically, since the array structure 20 is constituted by a plurality of array units 210, the entire array structure 20 appears as a plurality of closed cross-sectional patterns in the XOZ plane. Each cross-sectional pattern corresponds to one array unit 210.
Since the structure of the array unit 210 is different between different array unit rows 220, it can be understood that the cross-sectional pattern of the array structure 20 in the XOZ plane is shown as a pattern in which the cross-sectional patterns in the XOZ plane are arranged side by side along the OY axis, as shown in fig. 5.
In an embodiment of the present application, the cross-sectional pattern of the array unit 210 in the XOY plane is a closed pattern. The closed graph is formed by enclosing an arc, two line segments which pass through two end points of the arc and are perpendicular to the OY axis and the OY axis.
In an embodiment of the present application, the array unit curved surface 212 is formed by rotating an arc of the array unit 210 in a cross-sectional view of the XOZ plane about an OZ axis as a rotation axis.
Specifically, the direction of the OZ axis may be understood as a horizontal direction.
Optionally, the generation process of the array unit curved surface 212 is:
1) the arc line of the cross-sectional pattern of each array unit 210 in the XOZ plane is taken as a generatrix, and the rotation is performed by 180 degrees by taking the OZ axis as a rotation axis, so that a closed geometric body above the lens bottom surface 110 is formed, a curved surface of the array unit 210 is formed, and the whole three-dimensional structure of the array unit 210 is formed, namely the shape of the closed geometric body.
It will be appreciated that the cross-sectional shape of the closed geometric body in the XOY plane, as shown in fig. 6 and 7, is changed to a semicircular shape surrounded by a semicircular arc and the OY axis. The radius of the semicircle is the absolute value of the ordinate of the point where the ordinate of the cross-sectional pattern of the array unit 210 on the XOZ plane is maximum in the three-dimensional rectangular coordinate system, and this point is exactly the highest point of the arc line of the cross-sectional pattern of the array unit 210 on the XOZ plane.
2) In order to make the light distribution angle of the array unit 210 on the XOY plane be 0 to 48 degrees, that is, after the light is emitted through the curved surface 212 of the array unit, the included angle between the emitted light and the OX axis on the XOY plane belongs to the angle range of 0 degree or more to 48 degrees or less, the XOY plane needs to be distributed with light. As shown in fig. 6, the specific steps are as follows:
1) and acquiring the air refractive index and the array structure material refractive index. The refractive index of the air is 0, and the refractive index of the array structure material is 1.4935.
2) As shown in fig. 6, one array unit 210 is selected, and in the array unit 210 in the XOY observation plane, light is refracted through the curved surface 212 of the array unit, and then exits the array unit 210 as a refraction scene to perform refraction analysis, and formula 2 is obtained according to the law of refraction.
Wherein n is0Is the refractive index of air. n is1Is the refractive index of the array structure material. i is the serial number of the array cell.
Is the angle of incidence.
Is the angle of the exit angle. The incident angle is an angle between an incident ray irradiated to the curved surface 212 of the array unit in the XOY plane and a normal line. The exit angle is an included angle between an exit ray and a normal line after the incident ray irradiated to the curved surface 212 of the array unit is refracted by the curved surface in the XOY plane.
Specifically, equation 2 is an equation for the law of refraction. 3) Will be provided with
The value of (A) is 90 degrees and substituted into the formula 2 to calculate the incident angle
Obtaining a critical angle of incidence
Critical of the angle of incidenceAngle of rotation
Is 42 degrees. Critical angle of the incident angle
A maximum angle of an incident angle such that incident light irradiated to the curved surface 212 of the array unit is not totally reflected.
Specifically, since there is a critical angle, i.e., an exit angle, in which total reflection rather than refraction preferentially occurs from the optically dense medium to the optically sparse medium
Corresponding angle of incidence at 90 degrees
The angle of (c). Calculated, the critical angle of the incident angle
Is 42 degrees, i.e. the angle of incidence
Has a maximum angle value of 42 degrees. If angle of incidence angle
If the angle exceeds 42 degrees, the light is totally reflected on the curved surface 212 of the array structure, and the light cannot exit the curved surface 212 of the array structure. Therefore, we want to control the angle of the incident angle
0 to 42 degrees inclusive.
4) Continuously carrying out refraction analysis on the refraction scene to obtain a first light distribution angle alphaiAngle to angle of incidence
The relationship between them, as in equation 3. The first light distribution angle alphaiIs the angle of the ray exiting through curved surface 212 of the array element with the OX axis on the XOY plane.
Wherein alpha isiIs the first light distribution angle.
Is the angle of incidence. n is0Is the refractive index of air. n is1Is the refractive index of the array structure material. i is the serial number of the array unit 210.
Specifically, this step is a specific light distribution process of the XOY plane. As shown in fig. 6, the angle of incidence is the angle of the incident ray from normal, according to the law of refraction. The incident ray is a straight line parallel to the axis OX, the vertical line. The normal is a straight line perpendicular to the refracting surface. Angle of incidence i.e
The second light distribution angle is the angle of the included angle between the light ray emitted from the curved surface of the array unit and the OX axis on the XOY observation plane, namely alphai. The angle of the exit angle, i.e. the angle between the normal and the light ray exiting through the curved surface of the array unit, is
Equation 3 can be obtained by refraction analysis.
5) Taking the value of the angle of the incident angle as a critical angle
Substituting the numerical value of (1) into the formula 3, and calculating to obtain the maximum value of the second light distribution angle
Is 48 degrees.
Specifically, the foregoing step S413 has calculated the critical angle at which the incident angle is found
At 42 degrees, then will
Is equal to
Substituting 42 degrees into formula 3 can obtain the maximum value of the second light distribution angle
Is 48 degrees. The array unit 210 can realize light distribution of 0 to 48 degrees in the XOY observation plane because total reflection of incident light rays on the curved surface 212 is prevented. Of course, depending on the change in refractive index of the material of the array structure,
and
slight variations will occur.
6) The semi-circular arcs of the array elements 210 in the XOY plane are intercepted to remove the angle causing the incident angle to be larger than
Part (c) of (a).
Specifically, as shown in fig. 7, in the XOY plane, the sectional pattern of the array unit 210 is an axisymmetric pattern in which the angle of the incident angle is the farther away from the point of refraction of the axis of symmetry in the semicircular arc
The larger.
The step of intercepting the semi-circular arc is to remove the angle causing the incident angle
Greater than critical angle
The refraction point of the light source prevents the phenomenon that the light rays are totally reflected on the curved surface due to the fact that the refraction point is larger than 48 degrees.
7) And respectively making a perpendicular line to the OY axis through two end points of the arc retained after the interception processing to obtain two line segments. And taking a figure formed by surrounding the arc, the two line segments and the OY axis which are remained after the cutting processing as a cross-sectional figure of the array unit on the XOY surface.
Specifically, the circular arc remaining after the truncation processing is shown in fig. 8. By intercepting all the array units 210 by the semicircular arcs, after the light irradiates the curved surface 212 of the array unit, the light cannot be totally reflected, but the curved surface 212 of the array unit is emitted in a refraction mode, so that the whole lens structure can realize a normal illumination function.
In an embodiment of the present application, the angle between the light ray emitted through the curved surface 212 of each array unit 210 and the OX axis on the XOZ plane satisfies equation 1.
Wherein, thetaiIs the angle in the XOZ plane from the OX axis of a ray emerging through the curved surface 212 of an array element 210. i is the serial number of the array unit 210. M is the total number of array units 210 in the array unit row 220 to which the array unit 210 belongs. QiIs thetaiA set of affiliations. QσIn order to be a target set of objects,
is thetaiThe minimum value of (a) is determined,
is thetaiIs measured.
Specifically, for simplicity of description, θiHereinafter, the second light distribution angle is simply referred to as the second light distribution angle. As shown, the array unit bottom surface 211 of each array unit 210 is fixedly connected to the lens bottom surface 110 of the TIR lens 10, and the top surface is an array unit curved surface 212. The array element curved surface 212 appears as an arc in a cross-sectional view in the XOZ plane. Defining a second light distribution angle thetaiThe included angle between the light ray emitted from the curved surface 212 of the array unit and the OZ axis on the XOZ plane.
In order to enable the lens structure capable of freely distributing light within 48 degrees to freely distribute light within the angle range of 0 degree to 48 degrees on the XOZ plane, light distribution at the second light distribution angle needs to be performed for each array unit 210.
In this embodiment, the angle range of the angle between the light beam emitted through the curved array unit surface 212 of one array unit 210 and the OX axis on the XOZ plane is defined by formula 1, so that not only the second light distribution angle of each array unit 210 is in the emission angle range of 0 degree to 48 degrees, but also a second light distribution angle in a specific emission angle range can be configured for each array unit 210, so that the light beam can be emitted as light with different angles through different array units 210. Specific examples are shown in table 1 below.
TABLE 1 second light distribution Angle configuration Table
In the embodiment shown in table 1, 12 array units 210 are included in the array structure 20, and the second light distribution angle of each array unit 210 belongs to one outgoing angle range. The second light distribution angles of each array unit 210 are in a range from 0 degree to 48 degrees, but are different from each other, but the union of the 12 emergence angle ranges is from 0 degree to 48 degrees, which means that the 12 emergence angle ranges cover the whole total angle range from 0 degree to 48 degrees. This enables rays to exit at different angles through different array elements 210, the angles of the exiting rays to the OX axis (i.e., the plumb line) being varied.
In an embodiment of the present application, the array structure 20 is integrally formed with the TIR lens 10.
In particular, the array structure 20 is integrally formed with the TIR lens 10, which facilitates the production by mold, facilitates the manufacturing, and greatly saves the production cost.
The method for calculating the number of array cells 210 included in each array cell row 220 is described below.
S100, acquiring the width d of each array unit 210 in the XOZ planei。
Specifically, as shown in fig. 10, the preset width d of each array unit 210 in the XOZ plane is obtained firsti。
S200, according to the width d of each array unit 210 on the XOZ planeiCalculating the absolute value D of the abscissa of the reference point of the array unit 210 on the XOZ planei. The reference point of the array unit 210 in the XOZ plane is the intersection point of a straight line perpendicular to the OZ axis in the array unit 210 and the OZ.
Specifically, as shown in FIG. 10, DiEssentially the linear distance of the location of the array element 210 from the OZ axis.
S300, calculating the length L of the array unit row 220 where the array unit 210 is located along the OY axis direction according to the formula 4i。
Wherein L isiIs the length of the array cell row 220 along the OY axis direction in which the array cell 210 is located. R is the radius of the lens bottom surface 110. DiIs the base of the array unit 210 in the XOZ planeAbsolute value of the abscissa of the quasi-point. i is the serial number of the array unit 210.
Specifically, as shown in fig. 11, fig. 11 is a top view of the array structure 20. Then, at the angle of the top view, D can be seeni、LiThe relationship with R satisfies the Pythagorean theorem, so L can be obtainedi。
S400, acquiring the height H of the array unit 210 on the XOZ planei. The height H of the array unit 210 in the XOZ planeiThe absolute value of the ordinate of the coordinate point where the ordinate is the largest in the XOZ plane for this array unit 210.
Specifically, as shown in fig. 12, the radius of the array unit 210 in the XOY plane, that is, the absolute value of the ordinate of the point where the ordinate of the cross-sectional diagram of the array unit 210 in the XOZ plane is maximum in the three-dimensional rectangular coordinate system is just the highest point of the arc line.
S500, calculating a linear distance W between two line segments of the array unit 210 in the XOY plane according to the formula 5i。
Wherein, WiIs the straight-line distance between two line segments in the XOY plane for the array unit 210. L isiIs the length of the array cell row 220 along the OY axis direction in which the array cell 210 is located. HiIs the height of the array unit 210 in the XOZ plane.
Is the critical angle of incidence. i is the serial number of the array unit 210.
Specifically, as shown in fig. 12, the intercepted half arc may be subjected to refraction analysis according to the refraction characteristics of the arc, and the linear distance W between two line segments of the array unit 210 in the XOY plane may be calculated according to equation 6i。
S600, calculating the array unit 21 in the array unit row 220 where the array unit 210 is located according to formula 5Number N of 0i。
Wherein N isiThe number of array cells 210 in the array cell row 220 in which the array cells 210 are located. WiIs the straight-line distance between two line segments in the XOY plane for the array unit 210. i is the serial number of the array unit 210.
Specifically, it can be calculated that several array cells 210 having the same structure are specifically arranged per array cell row 220 by formula 5.
By the calculation method, the array units 210 with the same structure specifically arranged in each array unit row 220 can be calculated accurately and rapidly, and all structural parameters of the whole array structure 20 are calculated.
The application also provides a wall washer.
In an embodiment of the present application, the wall washer lamp includes a plurality of lens structures capable of freely distributing light within 48 degrees as mentioned in the previous embodiments.
The technical features of the embodiments described above may be arbitrarily combined, the order of execution of the method steps is not limited, and for simplicity of description, all possible combinations of the technical features in the embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations of the technical features should be considered as the scope of the present description.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A lens structure capable of freely distributing light within 48 degrees, comprising:
the TIR lens is arranged into an axisymmetric body in a bowl shape, the top of the TIR lens is a plane which is used as the bottom surface of the TIR lens; the bottom of the TIR lens is provided with a convex pit which is close to the bottom surface of the lens to form a lens refraction surface; the side wall surface of the TIR lens is a lens reflecting surface; when the lens structure capable of freely distributing light within 48 degrees is placed in a three-dimensional rectangular coordinate system, the circle center of the bottom surface of the lens is taken as the origin of coordinates, the extending direction of a straight line passing through the circle center and perpendicular to the bottom surface of the lens is taken as the X-axis direction, and the extending directions of two mutually perpendicular diameters passing through the circle center are respectively taken as the Z-axis direction and the Y-axis direction;
the array structure comprises a plurality of array units, and the array units are arranged on the bottom surface of the lens in a matrix manner; each array unit comprises an array unit bottom surface and an array unit curved surface, and the array unit bottom surface is fixedly connected with the lens bottom surface;
after the light rays are emitted from the curved surface of each array unit, the included angles between the emergent light rays and the OX axis on the XOZ plane and the XOY plane belong to the angle range from 0 degree to 48 degrees.
2. A lens structure capable of freely distributing light within 48 degrees according to claim 1, wherein the plurality of array units are paved on the bottom surface of the lens, so that the shape of the bottom surface of the array structure formed by the plurality of array units is the same as that of the bottom surface of the lens; the bottom surface of the lens is circular in shape.
3. A lens structure capable of freely distributing light within 48 degrees according to claim 2, wherein the array structure comprises a plurality of array unit rows, each array unit row is formed by arranging a plurality of array units with the same structure in parallel along a direction parallel to the OZ axis; the structure of the array unit is different between different array unit rows.
4. A lens structure capable of freely distributing light within 48 degrees as claimed in claim 3, wherein the cross-sectional pattern of the array unit in the XOZ plane is a closed pattern formed by an arc line, a straight line perpendicular to the OZ axis, and the OZ axis.
5. A lens structure capable of freely distributing light within 48 degrees according to claim 4, wherein the cross-sectional pattern of the array structure on the XOZ surface is a pattern formed by arranging a plurality of array units with different shapes in parallel on the cross-sectional pattern on the XOZ surface along the OY axis.
6. A lens structure capable of freely distributing light within 48 degrees according to claim 5, wherein the cross-sectional pattern of the array unit on the XOY plane is a closed pattern formed by a circular arc, two line segments passing through two end points of the circular arc and perpendicular to the OY axis and enclosing the OY axis.
7. A lens structure capable of freely distributing light within 48 degrees as claimed in claim 6, wherein the curved surface of the array unit is formed by rotating an arc of the array unit in a cross-sectional pattern of an XOZ plane around an OZ axis as a rotating axis.
8. A lens structure capable of freely distributing light within 48 degrees as claimed in claim 7, wherein the included angle between the light ray emitted through the curved surface of the array unit of each array unit and the axis OX on the XOZ plane satisfies formula 1;
wherein, thetaiThe angle between the light ray emitted through the curved surface of the array unit of one array unit and the OX axis on the XOZ surface is shown as the angle, i is the serial number of the array unit, i is 1, 2, 3iIs thetaiSet of affiliations, QσIn order to be a target set of objects,
is thetaiThe minimum value of (a) is determined,
is thetaiIs measured.
9. The lens structure of claim 8, wherein the array structure is integrally formed with the TIR lens.
10. A wall washer light comprising a plurality of lens structures as claimed in any one of claims 1 to 9 which are free to distribute light within 48 degrees.
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