CN208312265U - A kind of low-angle TIR lens system - Google Patents
A kind of low-angle TIR lens system Download PDFInfo
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- CN208312265U CN208312265U CN201820693093.4U CN201820693093U CN208312265U CN 208312265 U CN208312265 U CN 208312265U CN 201820693093 U CN201820693093 U CN 201820693093U CN 208312265 U CN208312265 U CN 208312265U
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Abstract
The utility model discloses a kind of low-angle TIR lens system, including TIR lens and linear light source, the TIR lens are the rotationally symmetric body with bowl structure, and bottom is recessed upwards, form the pit of truncated cone-shaped, the linear light source is located at pit bottom；Convex lens is set as at the top of the pit, the side of the pit is the plane of refraction of lens, and the side wall surface of the TIR lens is the fully reflecting surface of lens, and the top planes of the TIR lens are light-emitting surface.The light of two endpoints of linear light source of the lens system is emitted with angle identical with the rotation axes of symmetry of TIR lens, and light range is more concentrated, and light distribution angle is optimized；And the endpoint light of linear light source is consistent in the drop shadow spread of hot spot, can mutual colour mixture, improve the spatial uniformity of coloration.
Description
Technical field
The utility model relates to the technical fields of LED illumination, more particularly, to a kind of low-angle TIR lens system.
Background technique
TIR(Total Internal Reflection) lens refer to using inner full-reflection principle design lens system,
Because the characteristic of its high-effective concentration is used widely.
The technical effect that low-angle is realized in the design of existing low-angle TIR lens, does not take hot spot effect into account, this
Sample will appear a main spot and an apparent secondary hot spot, and chrominance space is not uniform enough, is with outside general hot spot obvious
Macula lutea can not accomplish uniform mixed light.If hot spot and light mixing effect carried out, angle will become larger, and K value reduces, and central light strength becomes
It is small.
And in existing TIR lens system, light source design is point light source, but in practical applications light source have it is certain
Size, when dimension of light source is larger, the error of generation is larger, and light distribution angle out also can be bigger than normal, central light strength and K value
It can be relatively low.
For this reason, it is necessary to design a kind of TIR lens, make it that light source be cooperated to form system, realizes low-angle illumination
It is also able to achieve the even transition of entire hot spot simultaneously, central light strength is high.
Summary of the invention
In order to solve the above problems existing in the present technology, the utility model provides a kind of low-angle TIR lens system,
It includes low-angle TIR lens and linear light source, and the light of two endpoints of linear light source is with identical with the rotation axes of symmetry of TIR lens
Angle outgoing, light range are more concentrated, and light distribution angle is optimized；And the endpoint light of linear light source is in the drop shadow spread one of hot spot
Cause, can mutual colour mixture, improve the spatial uniformity of coloration.
To achieve the goals above, the utility model provides following technical solution:
A kind of low-angle TIR lens system, including TIR lens and linear light source, the TIR lens are with bowl structure
Rotationally symmetric body, bottom are recessed upwards, form the pit of truncated cone-shaped, and the linear light source is located at pit bottom；In the pit
Top be set as convex lens, the side of the pit is the plane of refraction of lens, and the side wall surface of the TIR lens is the complete of lens
Reflecting surface, the top planes of the TIR lens are light-emitting surface.
As further describing for the technical solution of the utility model, light a part of the linear light source is via pit
Side, the side wall surface of TIR lens and top planes outgoing；A part is emitted via convex lens and top planes.
As further describing for the technical solution of the utility model, the incident ray of the light source endpoint of the linear light source is passed through
After crossing the side refraction of pit, crosses in the side wall surface of TIR lens, be totally reflected later from top planes and be emitted.The two of linear light source
The light of a endpoint is emitted with angle identical with the rotation axes of symmetry of TIR lens, according to rim ray principle, other models of light source
Light in enclosing also is located in the angular range, thus light range is more concentrated, and light distribution angle can do better.By to light source
The control of rim ray, and then the chrominance space of entire hot spot is controlled, avoid hot spot edge from the case where macula lutea occur.
In addition, the light of two endpoints of linear light source is that angle identical with vertical axis is emitted, so the light of two endpoints exists
Diameter on hot spot is identical, avoids forming two different hot spots in the light projection to hot spot of two endpoints, can be improved in this way
Illumination uniformity, while improving central light strength.
Due to the light on light source endpoint, the drop shadow spread on hot spot is consistent with diameter, and the light of two endpoints can phase mutual respect
It is folded, so can mutual colour mixture, improve evenness degree.
As further describing for the technical solution of the utility model, the convex lens is circle in the side towards pit
Arc structure.In a certain range, the diameter of convex lens arc structure is smaller, and hot spot is also smaller；Conversely, the diameter of circular arc is bigger,
Hot spot is also bigger.
As further describing for the technical solution of the utility model, the section of the pit is class trapezium structure.
The technical effect obtained based on above-mentioned technical solution, the utility model are as follows:
(1) low-angle TIR lens system provided by the utility model, optimizes the endpoint of linear light source, passes through
The endpoint for controlling linear light source passes through the outgoing route of TIR lens, while realizing low-angle illumination, keeps hot spot transition uniform,
A main spot is formed, uniformity of illuminance and central light strength are high.
(2) the low-angle TIR lens system of the utility model, the light of linear light source is respectively via convex lens and pit side
Face is finally emitted in light-emitting surface.Light on endpoint can be overlapped, so can mutual colour mixture, keep the chrominance space uniformity high,
Improve illumination comfort level.
Detailed description of the invention
Fig. 1 is the sectional view of the low-angle TIR lens system of the utility model.
Fig. 2 is the light path schematic diagram of the low-angle TIR lens system of the utility model.
Fig. 3 is the calculation flow chart of fully reflecting surface curve discrete the point coordinate and slope of the utility model.
Specific embodiment
The utility model is carried out more below in conjunction with attached drawing and specific embodiment for the ease of understanding the utility model,
Comprehensive description.The better embodiment of the utility model is given in attached drawing.But the utility model can be with many differences
Form realize, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making pair
The disclosure of the utility model understands more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
Embodiment 1
Fig. 1 gives the sectional view of the low-angle TIR lens system of the present embodiment, as shown in Figure 1, a kind of low-angle TIR
Lens system, including TIR lens 1 and linear light source 2, wherein the TIR lens have the rotationally symmetric body of bowl structure, center
Axis is rotation axes of symmetry Z.TIR lens include that bottom is recessed forms the pit 11 of truncated cone-shaped upwards, and 11 top of pit is arranged in
Convex lens 12, side wall surface 13 and top planes 14 positioned at periphery.
In the present embodiment, light source is linear light source 2, is located at the bottom of pit 11, parallel with the bottom of TIR lens.
In optical design design, light a part of linear light source 2 is via the side 111 of pit, the side wall surface 13 of TIR lens and top
Plane 14 is emitted；A part is emitted via convex lens 12 and top planes 14.In the former light trend, the side of pit
111 be plane of refraction, and the side wall surface 13 of TIR lens is the fully reflecting surface of lens, and top planes 14 are light-emitting surface；The latter's
In light trend, convex lens 12 is plane of refraction, and top planes 14 are light-emitting surface.
Fig. 2 gives the light path schematic diagram of the low-angle TIR lens system of the present embodiment, as shown in Fig. 2, the end of linear light source
The incident ray that point a is issued meets at c point by the side 111 of pit, after side 111 reflects, by the side of TIR lens
Wall surface 13 meets at e point；Proximally, the incident ray that the endpoint b of linear light source is issued meets at d point by the side 111 of pit, is passing through
After crossing the refraction of side 111, e point is also met at by the side wall surface 13 of TIR lens, i.e., the incident ray of two endpoints is in fully reflecting surface
On realize and cross.Straight line pe is the angular bisector of two light ce and de, using pe as incident ray, to be parallel to rotational symmetry
The straight line em of axis Z is total reflection emergent ray.And according to light pe and em, then it can be with the slope k of the tangent line 3 at solution point e.
(1) unit vector of known incident light ac is iac, and the unit vector of refracted light ce is ice, side 111 and c
Point and the line of d point intersection are a fixed straight line, and unit normal vector is in111；Known air refractive index is ni, TIR lens
Refractive index be no, equation can be listed below by the law of refraction:
From the equations above, two equations can be listed, to solve the coordinate points of c.
(2) similarly, it is known that the unit vector of incident ray bd is ibd, and the unit vector of refracted light de is ide, by rolling over
Equation can be listed below by penetrating law:
From the equations above, two equations can be listed, to solve the coordinate points of d.
(3) by the coordinate points of the above-mentioned c found out and d, the unit vector ice and ide of refracted light ce and de can be found out,
Then there is following equation:
(4) because emergent ray em is vertical line, unit vector iem is it is known that then the unit vector i3 of tangent line 3 is following
Equation, and then solve slope k.
Fig. 3 gives the calculation flow chart of fully reflecting surface curve discrete the point coordinate and slope of the present embodiment, such as Fig. 3 institute
Show, in order to calculate side wall surface 13(fully reflecting surface) in e point coordinate and corresponding slope, first need to calculate the seat of c point and e point
Mark, then calculates unit vector ice and ide, and then calculate the unit vector ipe of neutrality line pe, finally obtains at point e
Slope.According to point e and the slope at this, then calculate the coordinate of next curve discrete point.
In the present embodiment, the light of two endpoints a and b of linear light source 2 are with identical with the rotation axes of symmetry of TIR lens
Angle outgoing, according to rim ray principle, light of the light source within the scope of other also is located in the angular range, thus light range is more
It concentrates, light distribution angle can do better.
In addition, the light of two endpoints of linear light source is that angle identical with vertical axis is emitted, so the light of two endpoints exists
Diameter on hot spot is identical, avoids forming two different hot spots in the light projection to hot spot of two endpoints, can be improved in this way
Illumination uniformity, while improving central light strength and K value.
Due to the light on light source endpoint, the drop shadow spread on hot spot is consistent with diameter, and the light of two endpoints can phase mutual respect
It is folded, so can mutual colour mixture, improve evenness degree, in the present embodiment, the spatial uniformity of coloration improves 45%.
Fig. 1 is returned to, the convex lens in TIR lens is arc structure in the side towards pit, and the section of pit is then
Class trapezium structure.In a certain range, the diameter of convex lens arc structure is smaller, and hot spot is also smaller；Conversely, the diameter of circular arc is got over
Greatly, hot spot is also bigger.In the present embodiment, can be by adjusting the arc diameter of convex lens, and then the size of hot spot is carried out
Adjustment.
Low-angle TIR lens system provided in this embodiment, optimizes the endpoint of linear light source, passes through control line
The endpoint of light source passes through the outgoing route of TIR lens, while realizing low-angle illumination, keeps hot spot transition uniform, forms one
A main spot, uniformity of illuminance and central light strength are high；In addition the light on endpoint can be overlapped, so can mutual colour mixture, make
The chrominance space uniformity is high, improves illumination comfort level.
The above content is only the structure example and explanation of the utility model, and the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these it is aobvious and
The alternative forms being clear to belong to the protection scope of the utility model.
Claims (5)
1. a kind of low-angle TIR lens system, which is characterized in that including TIR lens (1) and linear light source (2), the TIR lens
For the rotationally symmetric body with bowl structure, bottom is recessed upwards, forms the pit (11) of truncated cone-shaped, the linear light source (2)
Positioned at pit (11) bottom；It is set as at the top of the pit (11) convex lens (12), the side (111) of the pit is
The plane of refraction of mirror, the side wall surface (13) of the TIR lens are the fully reflecting surface of lens, the top planes (14) of the TIR lens
For light-emitting surface.
2. low-angle TIR lens system according to claim 1, which is characterized in that light one of the linear light source (2)
Lease making is emitted by the side of pit, the side wall surface of TIR lens and top planes；A part goes out via convex lens and top planes
It penetrates.
3. low-angle TIR lens system according to claim 1, which is characterized in that the light source endpoint of the linear light source (2)
Incident ray by pit side (111) refraction after, cross, be totally reflected later from top in the side wall surface (13) of TIR lens
Facial planes (14) outgoing.
4. low-angle TIR lens system according to claim 1, which is characterized in that the convex lens (12) is towards recessed
The side for cheating (11) is arc structure.
5. low-angle TIR lens system according to claim 1, which is characterized in that the section of the pit is that class is trapezoidal
Structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820693093.4U CN208312265U (en) | 2018-05-10 | 2018-05-10 | A kind of low-angle TIR lens system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820693093.4U CN208312265U (en) | 2018-05-10 | 2018-05-10 | A kind of low-angle TIR lens system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469822A (en) * | 2018-05-10 | 2019-11-19 | 惠州雷士光电科技有限公司 | A kind of low-angle TIR lens system |
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2018
- 2018-05-10 CN CN201820693093.4U patent/CN208312265U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469822A (en) * | 2018-05-10 | 2019-11-19 | 惠州雷士光电科技有限公司 | A kind of low-angle TIR lens system |
| CN110469822B (en) * | 2018-05-10 | 2024-05-03 | 惠州雷士光电科技有限公司 | Small-angle TIR lens system |
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