CN114963070A - Projecting lamp lens, light emitting module and projecting lamp - Google Patents
Projecting lamp lens, light emitting module and projecting lamp Download PDFInfo
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- CN114963070A CN114963070A CN202210686488.2A CN202210686488A CN114963070A CN 114963070 A CN114963070 A CN 114963070A CN 202210686488 A CN202210686488 A CN 202210686488A CN 114963070 A CN114963070 A CN 114963070A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/046—Refractors for light sources of lens shape the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a projection lamp lens, a light-emitting module and a projection lamp, wherein the projection lamp lens is a semi-rotating body, and one side of the projection lamp lens, which is close to a rotating shaft, is used as a bottom; the projector lens comprises a lens body and a reflector which are sequentially arranged along a rotating shaft; the bottom surface of the lens body is provided with an incident curved surface, one side of the incident curved surface, which is far away from the rotating shaft, is provided with a first refraction curved surface and a second refraction curved surface which are connected, and one side of the lens body, which is close to the reflector, is provided with a light outlet; the light generated by the light source is refracted to a preset receiving surface through the first refraction curved surface, is refracted to the receiving surface through the second refraction curved surface, is emitted to the reflector through the light outlet and is reflected to the receiving surface by the reflector. According to the invention, through the design of the lens body and the reflector, the rectangular light spots projected onto the receiving surface by the first emergent surface, the second refraction surface and the reflector are superposed to generate a gradual change effect.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to a projection lamp lens, a light-emitting module and a projection lamp.
Background
The projection lamp is a lamp which specifies that the illumination intensity on the illuminated surface is higher than the ambient environment, and is also called as a spotlight;
in practical use, the LED projection lamp is widely applied to scenes such as large-area operation field mines, building outlines, stadiums, overpasses, monuments, parks and flower beds, namely, large-area illumination lamps used outdoors can be regarded as the projection lamp, but most of projection results of the projection lamp are round light spots, light and shade gradual change cannot be achieved, and the decoration effect is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the projection lamp lens capable of projecting gradually-changed rectangular light spots.
In order to solve the technical problem, the invention is solved by the following technical scheme:
a projector lens is a semi-rotating body (namely a three-dimensional structure formed by only half-circle rotation of geometric figures), and one side of the projector lens close to a rotating shaft is taken as a bottom;
the projector lens comprises a lens body and a reflector which are sequentially arranged along a rotating shaft;
the bottom surface of the lens body is sunken towards the direction far away from the rotating shaft to form an incident curved surface, and the incident curved surface surrounds to form a light source cavity for placing a light source;
a first emergent surface is arranged on one side of the lens body, which is far away from the rotating shaft, and comprises a first refraction curved surface and a second refraction curved surface which are connected;
the lens body is provided with the light outlet at one side close to the reflector, and the light outlet is designed, so that the light rays emitted to the reflector are effectively prevented from being refracted or internally reflected when passing through the lens body, and the color separation of the light rays is avoided while the light rays generated by the light source are effectively utilized;
the reflector is close to one side of the lens body and protrudes outwards in the direction close to the lens body to form a reflecting curved surface; the light generated by the light source is refracted to a preset receiving surface through the first refraction curved surface to form a first rectangular light spot, is refracted to the receiving surface through the second refraction curved surface to form a second rectangular light spot, is emitted to the reflection curved surface through the light outlet and is reflected to the receiving surface by the reflection curved surface to form a third rectangular light spot;
the first rectangular light spot, the second rectangular light spot and the third rectangular light spot are overlapped on the receiving surface to form a fourth rectangular light spot.
As an implementable embodiment:
the light-emitting layer is arranged at the light-emitting opening and comprises an inner layer and an outer layer, light rays emitted by the light source are vertically incident to the inner layer, the light rays passing through the inner layer are vertically incident to the outer layer, and the light rays are emitted to the reflecting curved surface through the outer layer.
When light vertical incidence, its direction will not change, through the design to the light-emitting layer, under the prerequisite of avoiding light colour separation, realize the protection to the light source jointly through light-emitting layer and lens body.
As an implementable embodiment: the light emitting layer and the lens body are of an integrally formed structure.
As an implementable embodiment: a second emergent surface is arranged on one side of the lens body, which is far away from the reflector, one side of the second emergent surface is connected with the bottom surface of the lens body, and the other side of the second emergent surface is connected with the first refraction curved surface;
the second emergent surface is a semicircular plane perpendicular to the rotating shaft, and the circle center of the second emergent surface is coincident with the rotating shaft.
As an implementable embodiment:
the first refraction curved surface is formed by rotating a first curve around the rotating shaft for a half cycle, the first curve comprises a first end point and a second end point, the first end point is intersected with the second emergent surface, and the first end point is intersected with the second refraction curved surface;
the first curve is convex on a connecting line of the first end point and the second end point.
As an implementable embodiment:
the second refraction curved surface is formed by rotating a second curve around the rotating shaft for a half circle, and the second curve comprises a second end point and a third end point;
the second curve is convex on a connecting line of the second endpoint and the third endpoint.
As an implementable embodiment:
the light source cavity is a hemisphere, and light emitted by the light source vertically enters the incident curved surface.
As an implementable embodiment:
when the point on the circumference of the second emergent surface is connected with the spherical center of the light source cavity, the included angle formed by the obtained connecting line and the rotating shaft is 25-35 degrees;
when the first end point and the second end point are respectively connected with the sphere center, the included angle formed is 55-65 degrees;
when the second end point is connected with the sphere center, the obtained connecting line is vertical to the rotating shaft;
and when the second end point and the third end point are respectively connected with the sphere center, the included angle formed is 25-35 degrees.
As an implementable embodiment:
the reflecting curved surface is formed by a reflecting curved line rotating for a half circle around a rotating shaft, the reflecting curved line comprises a fixed end point and a movable end point, the fixed end point is the highest point of the reflecting curved surface, and the movable end point is the lowest point of the reflecting curved surface;
the reflection curve is formed by sinking the connecting line of the fixed end point and the movable end point in the direction far away from the lens body.
As an implementable embodiment:
the device also comprises a mounting plate;
the bottom of the lens body and the reflector are mounted on the mounting plate.
The invention also provides a light-emitting module which comprises the projector lens.
The invention also provides a projection lamp which comprises at least one light-emitting module.
Due to the adoption of the technical scheme, the invention has the remarkable technical effects that:
according to the invention, through the design of the lens body and the reflector, part of light rays generated by the light source are refracted to the receiving surface through the first emergent surface, part of the light rays are refracted to the receiving surface through the second refracting surface, and part of the light rays are reflected to the receiving surface through the reflecting curved surface;
the lens body is provided with the light outlet, so that the light rays emitted to the reflector are effectively prevented from being refracted or internally reflected when passing through the lens body, and the color separation of the light rays is avoided while the light rays generated by the light source are fully utilized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a perspective view of a lens of a projector according to the present invention;
FIG. 2 is a schematic side view of a projector lens of the present invention;
FIG. 3 is a schematic view of a first geometry and a second geometry;
FIG. 4 is a schematic view of the lens of the projector of FIG. 1 showing the light exiting;
FIG. 5 is a wall illuminance diagram of the lens of the projector of FIG. 1;
FIG. 6 is a light distribution curve (polar coordinates) of the projector lens of FIG. 1;
in the figure:
100 is a lens body, 110 is an incident curved surface, 120 is a first exit surface (not shown), 121 is a first refraction curved surface, 122 is a second refraction curved surface, 130 is a second exit surface, 140 is an exit layer 140, 200 is a reflector, 210 is a reflection curved surface, 300 is a mounting plate, point b is a first end point, point a is a second end point, and point c is a third end point.
Detailed Description
The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.
Embodiment 1, projector lens, as shown in fig. 1 to 6, is a half-rotator, in this embodiment, one side close to the rotation axis is taken as the bottom, and the rotation axis is shown as the y-axis in fig. 3.
The projector lens comprises a lens body 100 and a reflector 200 which are sequentially arranged along a rotating shaft, wherein the lens body 100 is formed by a first geometric figure rotating for a half circle (180 degrees) around the rotating shaft, the reflector 200 is formed by a second geometric figure rotating for a half circle (180 degrees) around the rotating shaft, and a person skilled in the art can set the interval between the lens body 100 and the reflector 200 by himself, and the interval is larger than 0;
as shown in fig. 1, the bottom surface of the lens body 100 is recessed in a direction away from the rotation axis to form an incident curved surface 110, and the incident curved surface 110 surrounds a light source cavity for placing a light source; the skilled in the art can select a proper LED light source according to the actual requirement;
the reflector 200 is protruded outward toward a direction close to the lens body 100 on a side close to the lens body 100 to form a reflective curved surface 210, the reflective curved surface 210 is a free curved surface, and light is totally reflected on the reflective curved surface 210.
In practical use, the lens of the light projector is vertically placed, a rotating shaft is parallel to a preset receiving surface, the reflector 200 is positioned below the lens body 100, part of light generated by a light source is refracted to the receiving surface through the lens body 100, part of light is emitted to the reflecting curved surface 210 of the reflector 200, and the light is reflected to the receiving surface through the reflecting curved surface 210 by the design that the reflecting curved surface 210 protrudes outwards in the direction close to the lens body 100, so that loss caused by the fact that the part of light is not projected to the receiving surface is avoided, and light efficiency is effectively utilized.
Present projecting lamp is make full use of light efficiency, often need adjust its projection angle to make the light that diverges downwards can throw to the receiving face, but often can lead to the facula of throwing to warp during angle regulation, and rectangle facula yielding is trapezoidal facula, can't cover the region that needs to illuminate completely, and decorative poor, and this embodiment is through the design to lens body 100 and reflector 200, when in-service use, need not to adjust the projection angle and can make full use of light efficiency.
Referring to fig. 1, a first exit surface 120 is disposed on a side of the lens body 100 away from the rotation axis, the first exit surface 120 includes a first refraction curved surface 121 and a second refraction curved surface 122 connected to each other, and both the first refraction curved surface 121 and the second refraction curved surface 122 are free curved surfaces;
referring to fig. 4, light generated by the light source is refracted to a preset receiving surface through the first refraction curved surface 121 to form a first rectangular light spot, and is refracted to the receiving surface through the second refraction curved surface 122 to form a second rectangular light spot;
the light generated by the light source is emitted to the reflecting curved surface 210 through the lens body 100, and is reflected to the receiving surface by the reflecting curved surface 210 to form a third rectangular light spot;
the first rectangular light spot, the second rectangular light spot and the third rectangular light spot are overlapped on the receiving surface to form a fourth rectangular light spot, and the fourth rectangular light spot is a light spot with the brightness uniformly decreased gradually.
In the embodiment, through the design of the lens body 100 and the reflector 200, a part of light generated by the light source is refracted to the receiving surface through the first emergent surface 120, a part of light is refracted to the receiving surface through the second refracting surface, and a part of light is reflected to the receiving surface through the reflecting curved surface 210, so that a gradual change effect is generated by superimposing on the receiving surface, visual comfort is provided for people, and in actual use, a user can display contents by using the brightness and darkness of the projected light according to needs.
If the trade company utilizes the projecting lamp to throw propaganda information to the shop ground outside nowadays, attract passerby of passing by, but its facula of throwing often is circular, and has a certain distance rather than the shop, and the publicity effect is not good, like the projecting lamp that the projecting lamp lens that utilizes the embodiment to provide constituted, it will follow the road surface to the shop entrance form the facula that luminance increases progressively, can effectively attract the passerby to pay close attention to the shop, and the publicity effect is better.
Further:
the light source cavity is a hemisphere, and light emitted by the light source is vertically incident to the incident curved surface 110.
When the light is vertically incident, the direction of the light will not change.
In this embodiment, through the design of the incident curved surface 110, the light is prevented from being refracted or reflected when passing through the incident curved surface 110, the utilization rate of the light is improved, and the complexity of light distribution of the first emergent surface 120 and the reflective curved surface 210 can be reduced.
Further:
a second exit surface 130 is arranged on one side of the lens body 100 away from the reflector 200, one side of the second exit surface 130 is connected with the bottom surface of the lens body 100, and the other side is connected with the first curved refraction surface 121;
the second emergent surface 130 is a semicircular plane perpendicular to the rotation axis, and the center of the semicircular plane coincides with the rotation axis.
In the present embodiment, the second exit surface 130 is designed as a plane, so as to prevent the light emitted to the second exit surface 130 from being totally reflected at the second exit surface 130, which affects the light projection effect.
Further:
referring to fig. 3, when a point (point b) on the circumference of the second exit surface 130 is connected to the center of sphere (origin) of the light source cavity, an included angle (angle α) formed by the connecting line and the rotation axis is 25 to 35 °;
when the angle α is too large, a large amount of light loss will occur, and when the angle α is too small, total reflection will occur, so the included angle in this embodiment is 30 °;
in this embodiment, the center of the sphere of the light source cavity is used as an origin, the optical axis of the light source is used as an x-axis, the direction in which the origin points to the receiving surface is used as a positive x-axis direction, the rotating axis is used as a y-axis, and the direction in which the origin points to the reflector 200 is used as a negative y-axis direction;
the angle of the light rays emitted from the origin to the center of the second exit surface 130 is 90 degrees, and the angle of the light rays emitted from the origin to any point on the circumference of the second exit surface 130 is 60 degrees;
further:
the first refracting curved surface 121 is formed by rotating a first curve about the rotation axis for a half-turn with reference to fig. 3, the first curve including a first end point (point b) intersecting the second exit surface 130 and a second end point (point a) intersecting the second refracting curved surface 122;
the first curve protrudes outwards from a connecting line of the first endpoint and the second endpoint.
The first curve may be calculated based on a clipping method.
Further:
when the second end point is connected with the sphere center, the obtained connecting line is vertical to the rotating shaft;
that is, the second endpoint is located on the optical axis of the light source, the angle of the light passing through the second endpoint is 0 °, and a person skilled in the art can set the distance from the second endpoint to the light source according to the size of the required projector lens and the size of the adopted light source, in this embodiment, the width of the light source is 3.5mm, and the distance from the second endpoint to the light source is 8 cm.
When the first end point and the second end point are respectively connected with the sphere center, the included angle (angle beta) formed is 55-65 degrees, and the included angle is 60 degrees in the embodiment;
as can be seen from the above, the angle of the light passing through the first curved refractive surface 121 and the second exit surface 130 ranges from 0 ° to 90 °.
Further:
referring to fig. 3, the second refractive curved surface 122 is formed by a second curve including a second end point (point a) and a third end point (point c) rotated by a half-turn around the rotation axis;
the second curve is convex on a connecting line of the second endpoint and the third endpoint.
The second curve can be calculated by a cutting method.
Further:
when the second end point and the third end point are respectively connected with the sphere center, the included angle (angle gamma) formed is 25-35 degrees, and when the included angle exceeds the range, the effect of the second rectangular light spot and the effect of the third rectangular light spot are influenced;
in this embodiment the included angle is 30.
The angle range of the light passing through the second refractive curved surface 122 and the light directed to the reflective curved surface 210 is 0 ° to-90 °, the angle range of the light passing through the second refractive curved surface 122 in this embodiment is 0 ° to-30 °, as shown by an angle γ in fig. 3, and the angle range of the light directed to the reflective curved surface 210 is-30 ° to-90 °, as shown by an angle δ in fig. 3;
for example, when the angle of the light passing through the third end is-40 °, the light having an angle of-35 ° to-40 ° is easily totally reflected due to an excessively large divergence angle when passing through the second refractive curved surface 122, so that the light cannot be refracted or subjected to color separation.
Note: a white light beam is composed of various lights with different wavelengths, and the light refractive indexes of the lights with different wavelengths are different, so that when an included angle between an incident light ray and the normal direction of the lens is larger, the lights with certain wavelengths are easy to refract, and the lights with certain wavelengths are totally emitted in the lens, so that the emergent light loses the light with certain colors to cause color separation.
Further:
the reflecting curved surface 210 is formed by a reflecting curved line rotating for a half circle around a rotating shaft, the reflecting curved line comprises a fixed end point and a movable end point, the fixed end point is the highest point of the reflecting curved surface 210, and the movable end point is the lowest point of the reflecting curved surface 210;
the reflection curve is a curve formed by a line connecting the fixed end point and the movable end point being concave in a direction away from the lens body 100.
The reflection curve can be obtained by calculation through a cutting method;
the smaller the divergence angle of the light beam emitted to the curved reflective surface 210 (for example, the light beam is-20 ° and the divergence angle thereof is 20 °), the longer the distance between the fixed end point and the movable end point in the x direction is, so that only the light beam having the divergence angle of 30 ° or more is reflected in the present embodiment.
Further, a light outlet is formed at a side of the lens body 100 close to the reflector 200, and light emitted from the light source is emitted to the reflective curved surface 210 through the light outlet.
In the present embodiment, the light outlet is designed to prevent the light emitted to the reflector 200 from being refracted or internally reflected when passing through the lens body 100, so that the light generated by the light source is effectively utilized and the color separation of the light is avoided.
Further, the light outlet is provided with a light outlet layer 140, the light outlet layer 140 includes an inner layer and an outer layer, as shown in fig. 4, light emitted by the light source is vertically incident to the inner layer, and light passing through the inner layer is vertically incident to the outer layer, and is emitted to the reflective curved surface 210 through the outer layer.
The light source arranged in the light source cavity is protected by the light emitting layer 140 and the lens body 100;
note: the light rays entering the inner layer and the outer layer are vertically incident, so that the direction of the corresponding light rays cannot be changed.
Further, the light emitting layer 140 and the lens body 100 are an integral structure.
In this embodiment, the lens body 100 and the light-emitting layer 140 are of PMMA structure, and the refractive index thereof is 1.49.
Part of the light emitted by the light source is vertically incident to the lens body 100, and the rest of the light is vertically incident to the light-emitting layer 140.
Further:
referring to fig. 2, a mounting plate 300 is further included;
the lens body 100 and the bottom of the reflector 200 are mounted on the mounting plate 300.
A person skilled in the art can fix the lens body 100 and the reflector 200 on the mounting plate 300 by gluing or the like, and can also set mounting blocks on the bottom surfaces of the lens body 100 and the reflector 200, set mounting grooves corresponding to the mounting blocks on the mounting plate 300, and fix the lens body 100 and the reflector 200 on the mounting plate 300 by matching the mounting blocks with the mounting grooves;
as can be seen from the above, there are various schemes for mounting the lens body 100 and the reflector 200 on the mounting board 300 in the art, and thus the present embodiment is not limited thereto.
Further:
the mounting plate 300 is provided with a first positioning strip and a second positioning strip;
the first positioning bar is used for indicating the installation position of the lens body 100;
the second positioning bar is used to indicate the installation position of the reflector 200.
The steps of calculating the first curve, the second curve and the third curve based on the clipping method are as follows:
s100, calculating a first curve:
presetting an included angle value formed when the first end point and the second end point are respectively connected with the sphere center, wherein the included angle value is 60 degrees in the embodiment;
referring to fig. 4, since each incident ray entering the first curve intersects the first curve, a corresponding curve can be generated through the intersection point by calculating the intersection point corresponding to each incident ray.
S110, determining the angle of the incident ray corresponding to the curve:
dividing the light rays passing through the first curve into N parts according to angles, and determining the angle theta of the ith part of light rays as i (0≤i≤N)：
S120, calculating a unit vector of each incident ray
The calculation formula is as follows:
s130, calculating the incident light
Unit vector of emergent ray in one-to-one correspondence
The calculation formula is as follows:
wherein d represents the distance from the receiving surface to the lens, which is a preset value, and d is 1000mm in the embodiment; h (i) represents the height of the ith emergent ray.
And taking the point with h being 0 as the point corresponding to the initial emergent ray.
Assuming that the receiving height on the receiving surface is 0-H, H is a preset value, H is 500mm in the embodiment, and the calculation formula of H (i) is as follows:
s140, calculating a first curve based on the refraction law:
the incident light and the emergent light satisfy the refraction law:
wherein n is 1 Refractive index corresponding to the emitted light, n 2 The refractive index of the incident light is n in this embodiment 1 ＝1.49，n 2 ＝1，
Is a unit vector of tangential direction and can be calculated based on the above equation
The calculation mode of the ith point on the first curve is as follows:
acquiring an intersection point of the i-1 st incident ray and the first curve to acquire a reference point;
acquiring a tangent direction unit vector corresponding to the reference point to acquire a reference vector;
constructing a reference tangent based on the reference point and the reference vector;
and calculating the intersection point of the reference tangent and the ith incident ray, and taking the obtained intersection point as the ith point on the first curve.
After the coordinates of each point in the first curve are obtained by calculation in sequence based on the above method, the circle center and the radius of the second emergent surface 130 can be determined according to the coordinates of the nth point.
Note: the initial point (i ═ 0) on the first curve is a preset point, and the skilled person will set the point according to the actual situation, and this point is (8,0) in this embodiment.
The technique of generating a corresponding curve based on coordinates of a plurality of points is prior art, and therefore, will not be described in detail in this embodiment.
S200, calculating a second curve:
presetting an included angle value formed when the second end point and the third end point are respectively connected with the sphere center, wherein the included angle value is 30 degrees in the embodiment;
similarly, by calculating the intersection point of the second curve and the corresponding incident ray, the corresponding curve can be generated through the intersection point.
S210, determining the angle of the incident ray corresponding to the curve:
dividing the light rays passing through the second curve into M parts according to angles, and determining the angle theta of the jth light ray j (0≤j≤M)：
S220, calculating the unit vector of each incident ray
The calculation formula is as follows:
s230, calculating the incident light
Unit vector of emergent ray in one-to-one correspondence
The calculation formula is as follows:
wherein h (j) represents the height of the j-th emergent ray.
Taking the point where h is 0 as the point corresponding to the initial emergent ray, the calculation formula of h (j) is:
s240, calculating a second curve based on the refraction law:
the second curve is calculated in the manner of calculating the first curve in step S130, and the initial point of the second curve is the same as the initial point of the first curve.
The person skilled in the art can generate the first geometric figure constituting the lens body 100 by setting the radius corresponding to the light source cavity and the thickness of the light emitting layer 140 by himself or herself and combining the first curve and the second curve obtained by calculation.
S300, calculating a reflection curve:
the third end point is connected with the sphere center, and an included angle value formed by the obtained connecting line and the y axis is preset, wherein the included angle value is 60 degrees in the embodiment;
in the same way, by calculating the intersection point of the reflection curve and the corresponding incident ray, the corresponding curve can be generated through the intersection point.
S310, determining the angle of the incident ray corresponding to the curve:
dividing the light rays passing through the reflection curve into L parts according to angles, and determining the angle theta of the kth part of light rays k (0≤k≤L)：
S320, calculating the unit vector of each incident ray
The calculation formula is as follows:
s330, calculating the incident light
Unit vector of emergent ray in one-to-one correspondence
The calculation formula is as follows:
wherein h (k) represents the height of the k-th emergent ray.
Taking the point where h is 0 as the point corresponding to the initial emergent ray, the calculation formula of h (k) is:
s340, calculating a reflection curve based on the reflection law:
the incident light and the emergent light satisfy the law of reflection:
the reflection curve is calculated in step S130 as described above such that the first curve is calculated based on the incident light and the tangential direction unit vector, and the initial point of the reflection curve is a fixed end point, which is set to (0, -5) in this embodiment.
The skilled person can generate the second geometric figure by combining the calculated reflection curve based on the preset thickness of the reflector 200, and the skilled person can set the coordinates of the fixed end point by himself according to the actual requirement, so that the generated second geometric figure is not overlapped with the first geometric figure.
The obtained first geometric figure and the second geometric figure are rotated by plus or minus 90 degrees around the y axis, and the lens body 100 and the reflector 200 corresponding to the lens body are obtained.
The lens obtained in the embodiment is verified based on ray tracing software TracePro, and the specific steps are as follows:
a receiving plate with a radius of 2000mm was set as a model of an actual wall surface, a lens was placed at a distance of 1000mm from the wall surface, and simulation was performed using a light source of XPE-2, the results of which are shown in FIGS. 5 and 6.
As can be seen from the wall surface illuminance diagram shown in fig. 5, the position marked by the central horizontal line, i.e., the value 0, is the ground, the positive direction of the y-axis is the height direction of the wall surface, and it can be seen from the diagram that the actual light spot of the light passing through the lens is in a rectangular shape, the height is about 500mm, the brightness decreases from the center to the left and right sides, and decreases from the ground to the high, thus presenting a gradually changing rectangular light spot.
Since the actual light source is not equal to the point light source, the light illuminance simulated by the actual light source is slightly different from the theoretical value, and as can be seen from the illuminance diagram, the actually obtained light spot is about 3000mm × 700mm of gradient rectangular light spot.
Embodiment 2, a light emitting module, includes projecting lamp lens of embodiment 1.
Embodiment 3, a light projector, including at least one light emitting module of embodiment 2.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It should be noted that:
reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes of the structure, the characteristics and the principle of the invention which are described in the patent conception of the invention are included in the protection scope of the patent of the invention. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The projector lens is characterized in that the projector lens is a semi-rotating body, and one side of the projector lens, which is close to a rotating shaft, is used as a bottom;
the projector lens comprises a lens body and a reflector which are sequentially arranged along a rotating shaft;
the bottom surface of the lens body is sunken towards the direction far away from the rotating shaft to form an incident curved surface, and the incident curved surface surrounds to form a light source cavity for placing a light source;
a first emergent surface is arranged on one side of the lens body, which is far away from the rotating shaft, and comprises a first refraction curved surface and a second refraction curved surface which are connected;
a light outlet is formed in one side, close to the reflector, of the lens body;
the reflector is close to one side of the lens body and protrudes outwards towards the direction close to the lens body to form a reflecting curved surface;
the light generated by the light source is refracted to a preset receiving surface through the first refraction curved surface to form a first rectangular light spot, is refracted to the receiving surface through the second refraction curved surface to form a second rectangular light spot, is emitted to the reflection curved surface through the light outlet and is reflected to the receiving surface by the reflection curved surface to form a third rectangular light spot;
the first rectangular light spot, the second rectangular light spot and the third rectangular light spot are overlapped on the receiving surface to form a fourth rectangular light spot.
2. The projector lens of claim 1, wherein:
the light-emitting layer is arranged at the light-emitting opening and comprises an inner layer and an outer layer, light rays emitted by the light source are vertically incident to the inner layer, the light rays passing through the inner layer are vertically incident to the outer layer, and the light rays are emitted to the reflecting curved surface through the outer layer.
3. The projector lens of claim 2, wherein:
the light emitting layer and the lens body are of an integrated structure.
4. The projector lens of any of claims 1 to 3, wherein:
a second emergent surface is arranged on one side of the lens body, which is far away from the reflector, one side of the second emergent surface is connected with the bottom surface of the lens body, and the other side of the second emergent surface is connected with the first refraction curved surface;
the second emergent surface is a semicircular plane perpendicular to the rotating shaft, and the circle center of the second emergent surface is coincident with the rotating shaft.
5. The projector lens of claim 4, wherein:
the first refraction curved surface is formed by rotating a first curve around the rotating shaft for a half circle, the first curve comprises a first end point and a second end point, the first end point is intersected with the second emergent surface, and the first end point is intersected with the second refraction curved surface;
the first curve is convex on a connecting line of the first end point and the second end point.
6. The projector lens of claim 5, wherein:
the second refraction curved surface is formed by rotating a second curve around the rotating shaft for a half circle, and the second curve comprises a second end point and a third end point;
the second curve is convex on a connecting line of the second endpoint and the third endpoint.
7. The projector lens of claim 6, wherein:
the light source cavity is a hemisphere;
when the point on the circumference of the second emergent surface is connected with the spherical center of the light source cavity, the included angle formed by the obtained connecting line and the rotating shaft is 25-35 degrees;
when the first end point and the second end point are respectively connected with the sphere center, the included angle formed is 55-65 degrees;
when the second end point is connected with the sphere center, the obtained connecting line is vertical to the rotating shaft;
and when the second end point and the third end point are respectively connected with the sphere center, the included angle formed is 25-35 degrees.
8. The projector lens of any of claims 1 to 3, wherein:
the reflecting curved surface is formed by a reflecting curved line rotating for a half circle around a rotating shaft, the reflecting curved line comprises a fixed end point and a movable end point, the fixed end point is the highest point of the reflecting curved surface, and the movable end point is the lowest point of the reflecting curved surface;
the reflection curve is a curve formed by the fact that the connecting line of the fixed end point and the movable end point is sunken towards the direction far away from the lens body.
9. A lighting module characterized by comprising the projector lens of any one of claims 1 to 8.
10. A projector characterized by comprising at least one light module as claimed in claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210686488.2A CN114963070A (en) | 2021-06-28 | 2021-06-28 | Projecting lamp lens, light emitting module and projecting lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210686488.2A CN114963070A (en) | 2021-06-28 | 2021-06-28 | Projecting lamp lens, light emitting module and projecting lamp |
| CN202110737670.1A CN113390033B (en) | 2021-06-28 | 2021-06-28 | Projecting lamp lens, light emitting module and projecting lamp |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110737670.1A Division CN113390033B (en) | 2021-06-28 | 2021-06-28 | Projecting lamp lens, light emitting module and projecting lamp |
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| CN114963070A true CN114963070A (en) | 2022-08-30 |
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| CN202210689029.XA Active CN114857543B (en) | 2021-06-28 | 2021-06-28 | Light projector lens, light emitting module with light projector lens and light projector |
| CN202210686488.2A Pending CN114963070A (en) | 2021-06-28 | 2021-06-28 | Projecting lamp lens, light emitting module and projecting lamp |
| CN202110737670.1A Active CN113390033B (en) | 2021-06-28 | 2021-06-28 | Projecting lamp lens, light emitting module and projecting lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009021182A1 (en) * | 2009-05-13 | 2010-11-18 | Hella Kgaa Hueck & Co. | Lighting device for roads |
| CN102818217B (en) * | 2012-09-11 | 2014-07-09 | 创高国际企业有限公司 | Secondary optical lens and related device thereof |
| CN102927527B (en) * | 2012-10-31 | 2014-06-04 | 谭泽民 | Guardrail light lens, guardrail light and roadway illumination device composed of guardrail light |
| US20150070900A1 (en) * | 2013-09-12 | 2015-03-12 | 3M Innovative Properties Company | Catadioptric spotlight |
| KR101501878B1 (en) * | 2014-06-30 | 2015-03-12 | 주식회사 미지에너텍 | Reflected light control the LED light lens |
| CN105546432B (en) * | 2016-02-02 | 2018-12-28 | 杭州光锥科技有限公司 | Wall lamp lens, light emitting module and wall lamp with the wall lamp lens |
| WO2019047136A1 (en) * | 2017-09-08 | 2019-03-14 | 深圳市西朗德光学有限公司 | Wall washer light and system and design method therefor |
| TWI669547B (en) * | 2017-09-28 | 2019-08-21 | 周聰明 | Light source guiding device |
| KR102115834B1 (en) * | 2018-10-17 | 2020-05-27 | 엘이디라이팅 주식회사 | Optical lens for led luminaire |
| CN111503558B (en) * | 2020-04-27 | 2023-07-25 | 江苏好视想电子实业有限公司 | Close-range installation high-uniformity LED blackboard lamp lens |
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- 2021-06-28 CN CN202210689029.XA patent/CN114857543B/en active Active
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| Publication number | Publication date |
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| CN114857543B (en) | 2024-01-26 |
| CN113390033A (en) | 2021-09-14 |
| CN113390033B (en) | 2022-07-05 |
| CN114857543A (en) | 2022-08-05 |
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