CN108800062B - Collimating lens - Google Patents
Collimating lens Download PDFInfo
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- CN108800062B CN108800062B CN201810726776.XA CN201810726776A CN108800062B CN 108800062 B CN108800062 B CN 108800062B CN 201810726776 A CN201810726776 A CN 201810726776A CN 108800062 B CN108800062 B CN 108800062B
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Abstract
The invention discloses a collimating lens, which comprises a body which is rotationally symmetrical around a central axis, wherein an optical cavity is arranged at the center of the bottom surface of the body, and the inner wall surface of the optical cavity is provided with an incidence surface of light; the side surface of the body is outwards expanded from the bottom surface to form a second reflecting surface of light; the side surface is provided with a plurality of teeth which are uniformly arranged in a radial way, and any section line of the side surface, which is cut by a plane passing through the central shaft, is a straight line; the curve of the incident surface, which is taken by the plane passing through the central axis, is a hump-shaped curve, and the curve of the emergent surface, which is taken by the plane passing through the central axis, is a saddle-shaped curve. The invention designs a novel ultrathin collimating lens, and on the premise of meeting the requirements of collimation effect and ultrathin design, the side surface of the lens is of a linear tooth-shaped structure, so that the degree of freedom of machining required by the side surface is reduced when the side surface is machined, the complexity of machining is reduced, and the machining precision and the machining cost are ensured.
Description
Technical Field
The invention belongs to the technical field of LED optical system accessories, and particularly relates to a collimating lens.
Background
The LED lighting chip is a widely applied lighting technology, the LED chip completes primary light distribution after primary packaging, the primary light distribution is completed by a packaging assembly, a certain randomly designed light emitting angle is formed after the primary light distribution, and secondary light distribution is often needed when the LED lighting chip is applied to a lighting lamp, so that the light distribution design such as indoor lighting, street lamp lighting, stage lighting, landscape lighting and the like is completed according to the application requirements of specific lighting scenes.
With the increasing demand, in the case of focusing on the collimation performance of a collimating optical lens, there is a higher demand for both the size and color mixing performance of the lens. In the compact collimating optical lens solution, a refractive-total reflection-refraction (RIXR) lens based on hyperboloid simultaneous design is a solution which is widely applied at present, but needs to be coated at the bottom of the lens, and has the problems of low coating efficiency, difficult control of coating uniformity and the like, particularly the problems of yellowing of optical materials and the like caused by plastic materials after a high-temperature coating process are solved, the light transmittance and the reliability are influenced, the cost and the process difficulty are greatly increased, and the application of the technology is limited. One prior art is to change the original reflective surface by coating into two total reflections by setting the reflective surface as a tooth-shaped structure, so that light mixing can be realized under the condition of omitting a coating process (the tooth-shaped structure is shown by referring to fig. 2).
However, in order not to change the collimation performance of the light path, the toothed surface must extend along the plane direction orthogonal to each point of the curved contour line, in order to form the collimation effect, the total reflection surface (coated surface) is originally an arc surface, that is, the tangent line along the radial direction is an arc line, in order to omit coating, the surface is changed into a toothed shape, and meanwhile, the arc shape in the radial direction is still required to be maintained, so that the processing of the three-dimensional structural surface becomes very complex, the traditional multi-degree-of-freedom processing equipment can hardly achieve such finish processing, and even the most advanced processing equipment can achieve the processing with multiple degrees of freedom, but the precision still cannot be guaranteed, and the processing difficulty and the cost are greatly increased.
Disclosure of Invention
The invention aims to solve the problems and designs a thin collimating lens which is easy to process.
The technical scheme adopted for realizing the purpose of the invention is as follows: the collimating lens comprises a rotationally symmetrical body around a central axis, wherein an optical cavity is arranged at the center of the bottom surface of the body, the optical cavity is concavely formed towards the inside of the body, and the inner wall surface of the optical cavity is formed into an incident surface of light;
the side surface of the body is outwards expanded from the bottom surface to form a second reflecting surface of light;
the top surface of the body is formed into a first reflecting surface and an emergent surface of light, the light which is emitted from the incident surface to the top surface in the body is reflected, and the light which is emitted from the second reflecting surface to the top surface is emitted out of the body;
any section line of the side surface, which is cut by a plane passing through the central axis, is a straight line, namely a side surface straight line;
the curve of the incident surface, which is taken by a plane passing through the central axis, is a hump-shaped curve, specifically, the curve changes as follows in the process that the curve extends outwards along the radial direction:
a rising section, the slope of the starting point of the rising section is larger than zero, then the slope of the rising section gradually decreases to zero,
the slope of the starting point of the descending segment is equal to zero and is smoothly connected with the tail end of the ascending segment, and then the slope of the descending segment gradually changes into a negative value and changes in a negative value range until reaching the curve end point;
the curve of the emergent surface, which is taken by a plane passing through the central axis, is a saddle-shaped curve, specifically, the curve changes as follows in the process that the curve extends outwards along the radial direction:
a lifting section, the slope of the starting point of the lifting section is larger than zero, then the slope of the lifting section is gradually reduced to zero,
a falling section, wherein the slope of the starting point of the falling section is equal to zero and is smoothly connected with the tail end of the lifting section, and then the slope of the falling section is reduced to be negative and continuously reduced in the negative range until the curve end point of the falling section;
the saddle-shaped curve is covered above the hump-shaped curve and the side straight line, and the highest point of the saddle-shaped curve is larger than the highest point of the hump-shaped curve in radial distance.
Preferably, the slope of the descending section of the hump-shaped curve changes, specifically, the slope of the descending section gradually becomes smaller and then gradually becomes larger in a negative range until the curve end point;
the slope of the starting point of the hump-shaped curve is 0.4 to 0.6;
the intersection point of the central axis and the bottom surface is an origin, the included angle between the connecting line of the highest point of the hump-shaped curve and the origin and the central axis is more than 20 degrees, the minimum slope of the hump-shaped curve is-5.5 to-6, and the included angle between the connecting line of the minimum slope position and the origin and the optical axis is 55 degrees to 60 degrees;
the ratio of the diameter of the circle formed by the end points of all hump-shaped curves to the height of the lens body is greater than 0.5.
Preferably, the included angle between the central axis and the connecting line of the starting point and the ending point of the hump-shaped curve is larger than 5 degrees.
Preferably, the radial coordinates of the starting point of the saddle-shaped curve are the same as the starting point of the hump-shaped curve;
the slope of the starting point of the saddle-shaped curve is 0.4 to 0.5, and then the slope of the saddle-shaped curve is monotonically decreased, and the decreasing speed is slower and slower;
the length of the part with the slope larger than 0 of the saddle-shaped curve is smaller than the length of the part with the slope smaller than 0;
the vertical height between the highest point of the saddle-shaped curve and the bottom surface is 10% -20% greater than the vertical height between the lowest point of the saddle-shaped curve and the bottom surface;
the slope of the saddle-shaped curve end point is-0.15 to-0.2;
the ratio of the height of the lens body to the outer diameter of the light-emitting surface is 0.15 to 0.25.
Preferably, the included angle between the side straight line and the bottom surface is 20-35 degrees;
the ratio of the radial distance between the side straight line starting point and the central axis to the height of the lens body is more than 1;
the ratio of the radial distance between the side straight line end point and the central shaft to the height of the lens body is more than 4;
the perpendicular distance between the side straight line end point and the saddle-shaped curve end point is more than 0.1mm.
Preferably, the side surface is provided with a plurality of teeth which are uniformly arranged in a radial manner.
Preferably, the teeth on the sides are designed by the following method:
(1) Selecting a side straight line as a base line, and selecting the midpoint of the base line;
(2) In the plane of the base line and the central axis, a normal vector and a tangential vector of the midpoint of the base line are made;
(3) Rotating the normal vector around the tangential vector by angles alpha and alpha to form two rays;
(4) The base line is respectively moved along two rays, and the moving track of the base line forms a V-shaped groove;
(5) Rotating the V-shaped grooves around the central shaft by angles beta and beta to generate 3 crossed V-shaped groove structures;
(6) And removing the crossing part of the middle V-shaped groove and the other 2V-shaped grooves, and removing the other 2V-shaped grooves, wherein the left part is the tooth structure.
Preferably, the number of teeth is m=360°/β, and m is an integer, β is not more than 6 degrees;
alpha is between 40 and 50 degrees.
Preferably, the starting point of the hump-shaped curve and the starting point of the saddle-shaped curve are not on the central axis, and the ending point of the hump-shaped curve and the starting point of the side straight line are on the bottom surface.
Preferably, the bottom surface of the body is provided with a mounting member;
the outer side edge of the body is provided with a protective convex ring.
Preferably, arc-shaped bulges or holes penetrating up and down the body are arranged in a circular range formed by all saddle-shaped curve starting points on the body.
The beneficial effects of the invention are as follows: firstly, an ultra-thin collimating lens with a brand-new light path principle is designed, and on the premise of meeting the requirements of collimating effect and ultra-thin design, a design combination with a curved incident surface, a straight side surface and a curved top surface is adopted; secondly, considering the problems of processing complexity and increasing the light mixing effect, the side surface (the second reflecting surface) of the lens is further in a toothed structure, so that the degree of freedom of processing required by the side surface is reduced when the side surface is processed, the processing complexity is reduced, and the processing precision and the processing cost are ensured.
Drawings
FIG. 1 is a schematic perspective view of a collimating lens according to an embodiment of the present invention
FIG. 2 is a schematic view showing a rear perspective of a collimating lens according to an embodiment of the present invention
FIG. 3 is a side view of a collimating lens according to an embodiment of the present invention
FIG. 4 is a cross-sectional view of a collimating lens according to an embodiment of the present invention
FIG. 5 is a schematic view of an optical surface of a collimating lens according to an embodiment of the present invention
FIG. 6 is a graph of optical surface generatrix of a collimating lens according to an embodiment of the present invention
FIG. 7 is a schematic diagram of a collimating light path of a collimating lens according to an embodiment of the present invention
FIG. 8 is a schematic view of the step (1) of the tooth design method according to the embodiment of the invention
FIG. 9 is a schematic view of normal vector of step (2) of the tooth design method according to the embodiment of the present invention
FIG. 10 is a schematic view of tangential vectors of step (2) of the tooth design method according to the embodiment of the present invention
FIG. 11 is a schematic view of step (3) of the tooth design method according to the embodiment of the invention
FIG. 12 is a schematic view of step (4) of the tooth design method according to the embodiment of the invention
FIG. 13 is a schematic view of step (5) of the tooth design method according to the embodiment of the invention
FIG. 14 is a schematic view of step (6) of the tooth design method according to the embodiment of the invention
FIG. 15 is a schematic view of a collimating lens structure and a collimating light path according to another embodiment of the present invention
FIG. 16 is a schematic view of a collimating lens structure and a collimating light path according to another embodiment of the present invention
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
As shown in fig. 1 to 7, the collimating lens of the present embodiment includes a body rotationally symmetrical about a central axis, a light cavity 5 is disposed at the center of the bottom surface 4 of the body, the light cavity 5 is concavely formed toward the inside of the body, and the inner wall surface of the light cavity is formed as the light incident surface 1.
As shown in fig. 5, a rectangular coordinate system is established with the central axis as the z axis and the bottom straight line as the x axis, which is convenient for explanation.
As shown in fig. 6, the hump-shaped curve DF has a starting point D, E being the highest point, and F being the end point, and is located on the bottom surface; a side straight line MN, wherein the starting point is M, and the end point is N; saddle curve AC, starting point a, B being highest point and F being end point. According to the height of each point from the bottom surface, the method comprises the following steps: hb > Hc > Ha > Hn > He > Hd.
The side surface 3 of the body is formed as a second reflecting surface of light in an outwardly flared shape from the bottom surface. The top surface 2 of the body is formed as a first reflecting surface and an outgoing surface for light, light that is emitted from the incident surface 1 to the top surface 2 in the body is reflected, and light that is emitted from the second reflecting surface 3 to the top surface 2 is emitted out of the body.
The side surface 3 is provided with a plurality of teeth which are uniformly arranged in a radial shape, and any section line of the side surface, which is cut by a plane passing through the central axis, is a straight line, namely a side surface straight line.
The curve of the incident surface 1 taken by a plane passing through the central axis z is a hump-shaped curve, specifically, the curve changes as follows in the process that the curve extends outwards along the radial direction: and the slope of the starting point of the ascending section is larger than zero, then the slope of the ascending section is gradually reduced to zero, the slope of the starting point of the descending section is equal to zero, the descending section is smoothly connected with the tail end of the ascending section, and then the slope of the descending section is gradually changed into a negative value and is changed in a negative value range until the curve end of the descending section is reached.
More specifically, the slope of the descending section of the hump-shaped curve changes, and the slope of the descending section gradually becomes smaller and then gradually becomes larger in a negative range until the curve ends.
More specifically, the included angle between the connecting line of the starting point and the end point of the hump-shaped curve and the central axis is more than 15 degrees and less than 35 degrees; the slope of the starting point of the hump-shaped curve is 0.4 to 0.6; the intersection point of the central axis and the bottom surface is the origin, the included angle between the connecting line of the highest point of the hump-shaped curve and the origin and the central axis is 24-26 degrees, the minimum slope of the hump-shaped curve is-5.5-6, the slope at the end point position is-1.64, and the included angle between the connecting line of the minimum slope position and the origin and the optical axis is 55-60 degrees; the ratio of the diameter of the circle formed by the end points of all hump-shaped curves to the height of the lens body is greater than 0.5. The included angle between the end point position of the hump-shaped curve and the central axis of the origin is 79-81 degrees.
The curve of the emergent surface, which is taken by a plane passing through the central axis z, is a saddle-shaped curve, specifically, the curve changes as follows in the process that the curve extends outwards along the radial direction: and the slope of the starting point of the lifting section is larger than zero, then the slope of the lifting section is gradually reduced to zero, the slope of the starting point of the falling section is equal to zero, the falling section is smoothly connected with the tail end of the lifting section, and then the slope of the falling section is reduced to be negative and continuously reduced in the negative range until the curve end point of the falling section.
More specifically, the radial coordinates of the starting point of the saddle-shaped curve are the same as the starting point of the hump-shaped curve; the slope of the starting point of the saddle-shaped curve is 0.4 to 0.5, then the slope is monotonically decreased, the decreasing speed is slower, and the decreasing speed of the slope is slower, namely the quadratic reciprocal of the curve coordinate y to x is smaller than 0; the length of the part with the slope larger than 0 of the saddle-shaped curve is smaller than the length of the part with the slope smaller than 0; the vertical height between the highest point of the saddle-shaped curve and the bottom surface is 10% -20% greater than the vertical height between the lowest point of the saddle-shaped curve and the bottom surface; the slope of the saddle-shaped curve end point is-0.15 to-0.2; the ratio of the height of the lens body to the outer diameter of the light-emitting surface is 0.15 to 0.25.
The saddle-shaped curve is covered above the hump-shaped curve and the side straight line, and the highest point of the saddle-shaped curve is larger than the highest point of the hump-shaped curve in radial distance. The end point of the hump-shaped curve and the start point of the side straight line are both on the bottom surface.
Fig. 7 is a schematic diagram of an optical path according to an embodiment of the present invention, from which a detailed optical path trend can be seen, after light is emitted from an LED light source, the light is refracted into a lens body through an incident surface 1, is incident on a top surface 2, is totally reflected by the top surface 2 to a side surface 3, and the side surface 3 has a tooth-shaped structure, so that a certain total reflection offset is generated in a tooth slot in an actual optical path, and the offset is in a horizontal direction, but is almost unchanged in a vertical direction, so that, referring to fig. 7, visible light is totally reflected again to the top surface 2 by the side surface 3, and is refracted out through the top surface 2.
In addition, the included angle between the side straight line and the bottom surface is 20-30 degrees; the ratio of the radial distance between the side straight line starting point and the central axis to the height of the lens body is more than 1; the ratio of the radial distance between the side straight line end point and the central shaft to the height of the lens body is 3 to 6; the perpendicular distance between the side straight line end point and the saddle-shaped curve end point is more than 0.1mm and less than 0.5mm.
And the teeth on the sides are designed by the following method:
(1) Selecting a side straight line as a base line, and selecting the midpoint of the base line; as shown in fig. 8;
(2) In the plane of the base line and the central axis, a normal vector (shown in figure 9) and a tangential vector (shown in figure 10) of the midpoint of the base line are made;
(3) Rotating the normal vector around the tangential vector by angles alpha and alpha to form two rays; as shown in fig. 11;
(4) The base line is respectively moved along two rays, and the moving track of the base line forms a V-shaped groove; as shown in fig. 12, the interface of fig. 12 is a design interface, and a four-window interface display view is viewed from three plane directions of xy, zx, zy and one axis-side direction (xyz) of a rectangular coordinate system, respectively.
(5) Rotating the V-shaped grooves around the central shaft by angles beta and beta to generate 3 crossed V-shaped groove structures; as shown in fig. 13;
(6) And removing the crossing part of the middle V-shaped groove and the other 2V-shaped grooves, and removing the other 2V-shaped grooves, wherein the left part is the tooth structure. As shown in fig. 14, the interface of fig. 14 is a design interface, and a four-window software interface display is viewed from three plane directions of xy, zx, zy and one axis side direction (xyz) of a rectangular coordinate system, respectively.
The design method used in the design method can be realized by adopting the current common drawing software tool, such as CAD and the like.
Wherein the number of teeth is m=360°/β, and m is an integer, β is not more than 6 degrees; alpha is between 40 and 50 degrees.
As some masking applications of the lens body, for example, a mounting member 8 is arranged on the bottom surface 4 of the body, and is used for mounting the lens on a specific structure in use, so as to play a role of mounting and fixing, and the masking does not form a change of the core technical scheme of the invention because the lens body is arranged outside the lens body, and still falls into the scope of the design concept of the invention; for another example, the outer edge of the body is provided with a protection convex ring 6 which mainly plays the additional roles of protection and the like, and the protection convex ring is also in the scope of the same invention conception. For example, it is also within the scope of the present invention to provide holes 7 penetrating the upper and lower sides of the body within the circular range formed by the starting points of all saddle-shaped curves.
As shown in fig. 15, the circular range of the body formed by the starting points of all saddle-shaped curves is provided with an arc-shaped bulge 9, which is another embodiment and is also within the scope of the invention.
As another embodiment, as shown in fig. 16, a saddle-shaped curve of the top surface 2 is used as a bus, and waveform dithering is performed along the curve direction, for example, points are sequentially staggered and taken on the upper side and the lower side of the bus, a fitted curve of the points is still a mother system, a new curve with fluctuation on the basis of the bus is formed by connecting all the points, and the new curve replaces the bus, so that a better light mixing effect can be obtained. Which are also within the same inventive concept as the present invention.
The beneficial effects of this embodiment are: firstly, an ultra-thin collimating lens with a brand-new light path principle is designed, and on the premise of meeting the requirements of collimating effect and ultra-thin design, a design combination with a curved incident surface, a straight side surface and a curved top surface is adopted; secondly, considering the problems of processing complexity and increasing the light mixing effect, the side surface (the second reflecting surface) of the lens is further in a toothed structure, so that the degree of freedom of processing required by the side surface is reduced when the side surface is processed, the processing complexity is reduced, and the processing precision and the processing cost are ensured.
In the embodiments of fig. 15 and 16, the hump-shaped curve is also within the scope of the invention, the starting point of which is not as pronounced as the hump-shaped curve of the embodiment of fig. 7, since the middle part thereof is provided with an arc-shaped bulge 9, which belongs to the converging lens principle which further exploits the light of the middle part.
Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention.
Claims (9)
1. The collimating lens comprises a rotationally symmetrical body around a central axis, wherein an optical cavity is arranged at the center of the bottom surface of the body, the optical cavity is concavely formed towards the inside of the body, and the inner wall surface of the optical cavity is formed into an incident surface of light;
the side surface of the body is outwards expanded from the bottom surface to form a second reflecting surface of light;
the top surface of the body is formed into a first reflecting surface and an emergent surface of light, the light which is emitted from the incident surface to the top surface in the body is reflected, and the light which is emitted from the second reflecting surface to the top surface is emitted out of the body;
it is characterized in that the method comprises the steps of,
any section line of the side surface, which is cut by a plane passing through the central axis, is a straight line, namely a side surface straight line;
the curve of the incident surface, which is taken by a plane passing through the central axis, is a hump-shaped curve, specifically, the curve changes as follows in the process that the curve extends outwards along the radial direction:
a rising section, the slope of the starting point of the rising section is larger than zero, then the slope of the rising section gradually decreases to zero,
the slope of the starting point of the descending segment is equal to zero and is smoothly connected with the tail end of the ascending segment, and then the slope of the descending segment gradually changes into a negative value and changes in a negative value range until reaching the curve end point;
the curve of the emergent surface, which is taken by a plane passing through the central axis, is a saddle-shaped curve, specifically, the curve changes as follows in the process that the curve extends outwards along the radial direction:
a lifting section, the slope of the starting point of the lifting section is larger than zero, then the slope of the lifting section is gradually reduced to zero,
a falling section, wherein the slope of the starting point of the falling section is equal to zero and is smoothly connected with the tail end of the lifting section, and then the slope of the falling section is reduced to be negative and continuously reduced in the negative range until the curve end point of the falling section;
the saddle-shaped curve is covered above the hump-shaped curve and the side straight line, and the highest point of the saddle-shaped curve is larger than the highest point of the hump-shaped curve in the radial distance;
the side surface is provided with a plurality of teeth which are uniformly arranged in a radial way.
2. The collimator lens of claim 1, wherein the slope of the descending segment of the hump-shaped curve varies, specifically, the slope of the descending segment gradually decreases and then gradually increases in a negative range until the curve ends;
the slope of the starting point of the hump-shaped curve is 0.4 to 0.6;
the intersection point of the central axis and the bottom surface is an origin, the included angle between the connecting line of the highest point of the hump-shaped curve and the origin and the central axis is more than 20 degrees, the minimum slope of the hump-shaped curve is-5.5 to-6, and the included angle between the connecting line of the minimum slope position and the origin and the optical axis is 55 degrees to 60 degrees;
the ratio of the diameter of the circle formed by the end points of all hump-shaped curves to the height of the lens body is greater than 0.5.
3. The collimating lens of claim 1, wherein the radial coordinates of the starting point of the saddle-shaped curve are the same as the starting point of the hump-shaped curve;
the slope of the starting point of the saddle-shaped curve is 0.4 to 0.5, and then the slope of the saddle-shaped curve is monotonically decreased, and the decreasing speed is slower and slower;
the length of the part with the slope larger than 0 of the saddle-shaped curve is smaller than the length of the part with the slope smaller than 0;
the vertical height between the highest point of the saddle-shaped curve and the bottom surface is 10% -20% greater than the vertical height between the lowest point of the saddle-shaped curve and the bottom surface;
the slope of the saddle-shaped curve end point is-0.15 to-0.2;
the ratio of the height of the lens body to the outer diameter of the light-emitting surface is 0.15 to 0.25.
4. The collimating lens of claim 1, wherein the side straight line forms an angle of 20 degrees to 35 degrees with the bottom surface;
the ratio of the radial distance between the side straight line starting point and the central axis to the height of the lens body is more than 1;
the ratio of the radial distance between the side straight line end point and the central shaft to the height of the lens body is more than 4;
the perpendicular distance between the side straight line end point and the saddle-shaped curve end point is more than 0.1mm.
5. The collimator lens of claim 1, wherein the teeth on the side are designed by:
(1) Selecting a side straight line as a base line, and selecting the midpoint of the base line;
(2) In the plane of the base line and the central axis, a normal vector and a tangential vector of the midpoint of the base line are made;
(3) Rotating the normal vector around the tangential vector by angles alpha and alpha to form two rays;
(4) The base line is respectively moved along two rays, and the moving track of the base line forms a V-shaped groove;
(5) Rotating the V-shaped grooves around the central shaft by angles beta and beta to generate 3 crossed V-shaped groove structures;
(6) And removing the crossing part of the middle V-shaped groove and the other 2V-shaped grooves, and removing the other 2V-shaped grooves, wherein the left part is the tooth structure.
6. The collimating lens of claim 5, wherein the number of teeth is m = 360 °/β, and m is an integer, β is no greater than 6 degrees;
alpha is between 40 and 50 degrees.
7. The collimating lens of claim 1, wherein neither the hump-shaped curve nor the saddle-shaped curve start point is on the central axis, and both the hump-shaped curve end point and the side straight start point are on the bottom surface.
8. The collimating lens of claim 1, wherein,
the bottom surface of the body is provided with a mounting component;
the outer side edge of the body is provided with a protective convex ring.
9. The collimating lens of claim 1, wherein the body is provided with arcuate protrusions or holes extending up and down through the body within a circular range defined by all saddle-shaped curve starting points.
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|---|---|---|---|---|
| CN101078494A (en) * | 2007-06-22 | 2007-11-28 | 清华大学 | Navigation mark lamp unit and its uses |
| CN203517635U (en) * | 2013-11-06 | 2014-04-02 | 重庆星河光电科技有限公司 | Total internal reflection collimation lens |
| CN104075239A (en) * | 2013-03-29 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | Optical system and illuminating device with same |
| CN205669770U (en) * | 2016-03-09 | 2016-11-02 | 福建吉星智能科技股份有限公司 | A kind of compound Fresnel Lenses being applicable to navigation light Optical devices |
| CN106597755A (en) * | 2017-03-06 | 2017-04-26 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN208382041U (en) * | 2017-07-04 | 2019-01-15 | 刘世芬 | A kind of collimation lens |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6547423B2 (en) * | 2000-12-22 | 2003-04-15 | Koninklijke Phillips Electronics N.V. | LED collimation optics with improved performance and reduced size |
| US7967477B2 (en) * | 2007-09-06 | 2011-06-28 | Philips Lumileds Lighting Company Llc | Compact optical system and lenses for producing uniform collimated light |
-
2018
- 2018-07-04 CN CN201821054411.9U patent/CN208382041U/en not_active Withdrawn - After Issue
- 2018-07-04 CN CN201810726776.XA patent/CN108800062B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078494A (en) * | 2007-06-22 | 2007-11-28 | 清华大学 | Navigation mark lamp unit and its uses |
| CN104075239A (en) * | 2013-03-29 | 2014-10-01 | 海洋王（东莞）照明科技有限公司 | Optical system and illuminating device with same |
| CN203517635U (en) * | 2013-11-06 | 2014-04-02 | 重庆星河光电科技有限公司 | Total internal reflection collimation lens |
| CN205669770U (en) * | 2016-03-09 | 2016-11-02 | 福建吉星智能科技股份有限公司 | A kind of compound Fresnel Lenses being applicable to navigation light Optical devices |
| CN106597755A (en) * | 2017-03-06 | 2017-04-26 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN208382041U (en) * | 2017-07-04 | 2019-01-15 | 刘世芬 | A kind of collimation lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108800062A (en) | 2018-11-13 |
| CN208382041U (en) | 2019-01-15 |
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