CN103206669A - Non-imaging optical lens for LED (Light Emitting Diode) reversing light of car - Google Patents

Non-imaging optical lens for LED (Light Emitting Diode) reversing light of car Download PDF

Info

Publication number
CN103206669A
CN103206669A CN2013100947793A CN201310094779A CN103206669A CN 103206669 A CN103206669 A CN 103206669A CN 2013100947793 A CN2013100947793 A CN 2013100947793A CN 201310094779 A CN201310094779 A CN 201310094779A CN 103206669 A CN103206669 A CN 103206669A
Authority
CN
China
Prior art keywords
top edge
ring
edge
face
torus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2013100947793A
Other languages
Chinese (zh)
Inventor
王尧
刘华
荆雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changchun Institute of Optics Fine Mechanics and Physics of CAS
Original Assignee
Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changchun Institute of Optics Fine Mechanics and Physics of CAS filed Critical Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority to CN2013100947793A priority Critical patent/CN103206669A/en
Publication of CN103206669A publication Critical patent/CN103206669A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A non-imaging optical lens for LED (Light Emitting Diode) reversing lights for cars related to the field of non-imaging optical lighting. The non-imaging optical lens includes a total reflection surface in the shape of an inverted cone, a hemispherical surface, a ring concaved arc surface, a cylindrical surface, a transmission plane, a big torus, a ring arc surface, a small torus, and a spherical surface. The upper edge of the hemispherical surface is joint sealed with the lower edge of the total reflection surface, the upper edge of the ring concaved arc surface is joint sealed with the upper edge of the hemispherical surface through the plane, and the edges of the two ends of a circular conical surface are respectively joint sealed with the edge of the hemispherical surface and the upper edge of the big torus. The lower edge of the big torus is in joint seal with the junction of upper edge of the hemispherical surface and the lower edge of the total reflection surface, and the edge of the transmission is joint sealed with the upper edge of the big torus and the transmission surface is in the shape of an inside concave. The lower edge of the big torus is joint sealed with the lower edge of the ring arc surface, the edge of the spherical surface is joint sealed with the upper edge of the small torus, and the number of the spherical surface is determined by the diameter of the small torus. The non-imaging optical lens is capable of achieving the effective control to the light delivered by the LED source, good in photometric characteristic and high in efficiency of solar energy utilization.

Description

The nonimaging optics lens that are used for the automobile LED back-up lamp
Technical field
The present invention relates to the nonimaging optics lighting technical field, be specifically related to a kind of nonimaging optics lens for the automobile LED back-up lamp.
Background technology
Characteristics such as LED has that volume is little, the life-span is long, colour rendering is good, efficient energy-saving, shock resistance are good make it have incomparable advantage in the automotive lighting field.The reversing automobile lamp is used for the illumination of rear view of vehicle road, and warns other to use the road person, and vehicle or is soon moveed backward.At present, LED does not also popularize in reversing automobile lamp field, only there is the back-up lamp of the high-grade automobile of minority to adopt led light source, as shown in Figure 8, for adopting the combining form of free form surface reflector cavity 11 and lens 12, existing reversing automobile lamp carries out the structural representation of luminous intensity distribution, the light that led light source sends is earlier through reflector cavity 11, carry out the luminous intensity distribution effect through lens 12 again, this light-configuration mode exists two aspect deficiencies: the one, and reflector cavity 11 can not accurately be controlled the light of led light source core, do not take full advantage of the light of center, caused the waste of the energy, capacity usage ratio is lower; The 2nd, reflector cavity 11 and lens 12 need accurately to cooperate mutually, are easy to generate error in assembling, cause the inaccurate of luminous intensity distribution performance.Above-mentioned these factors make LED be subjected to great restriction in the universal development in reversing automobile lamp field.
Summary of the invention
In order to solve existing low, the inaccurate problem of luminous intensity distribution performance of capacity usage ratio that adopts reflector cavity and lens that the reversing automobile lamp is carried out luminous intensity distribution and exist, the invention provides a kind of nonimaging optics lens for the automobile LED back-up lamp.
The technical scheme that the present invention adopts for the technical solution problem is as follows:
Be used for the nonimaging optics lens of automobile LED back-up lamp, these lens comprise by mechanical integrated machine-shaping:
Fully reflecting surface in an inverted cone;
The hemispherical face that top edge and described fully reflecting surface lower limb connect airtight;
The ring concave arc surface that top edge and described hemispherical face top edge connect airtight by taper seat, described taper seat edges at two ends connect airtight with described hemispherical face top edge and described ring concave arc surface top edge respectively;
The face of cylinder that connect airtight the junction of lower limb and described hemispherical face and fully reflecting surface;
The edge is closely contacted on and is the transmission plane of concave shaped with described face of cylinder top edge;
The great circle anchor ring that lower limb and described fully reflecting surface top edge connect airtight;
The ring arcwall face that top edge and described great circle anchor ring top edge connect airtight;
The roundlet anchor ring that lower limb and described ring arcwall face lower limb connect airtight;
The sphere that the edge is closely contacted on described roundlet anchor ring top edge, the number of described sphere is decided according to the diameter of described roundlet anchor ring.
The diameter of described great circle anchor ring and roundlet anchor ring is on same straight line, and both diameters are different and highly identical.
The top edge of described fully reflecting surface is the smaller diameter end of back taper, and lower limb is the larger diameter end of back taper.
The invention has the beneficial effects as follows:
One, the present invention adopts the total reflection element of being made up of transmission plane and fully reflecting surface, and the whole light achieve effective controls to led light source sends improve luminous intensity distribution performance and the efficiency of light energy utilization;
Two, the present invention is integrated collimating structure and light distribution structure, adopts mechanical integrated machine-shaping, has eliminated rigging error;
Three, the present invention uses nonimaging optics principle and Snell's law each faces of lens is carried out optical design, has realized effective control of all light that led light source is sent.
Description of drawings
Fig. 1 is the planar structure schematic diagram of the nonimaging optics lens for the automobile LED back-up lamp of the present invention;
Fig. 2 is the design principle figure of the transmission plane 3 in the nonimaging optics lens of the present invention;
Fig. 3 is the design principle figure of the fully reflecting surface 5 in the nonimaging optics lens of the present invention;
Fig. 4 is the design principle figure of the sphere 6 in the nonimaging optics lens of the present invention;
Fig. 5 is the design principle figure of the ring arcwall face 7 in the nonimaging optics lens of the present invention;
Fig. 6 is the design principle figure of the ring concave arc surface 2 in the nonimaging optics lens of the present invention;
Fig. 7 is the perspective view of the nonimaging optics lens for the automobile LED back-up lamp of the present invention;
Fig. 8 adopts the structural representation of reflector cavity and lens combination luminous intensity distribution for existing back-up lamp.
Among the figure: 1, hemispherical face, 2, the ring concave arc surface, 3, transmission plane, 4, the face of cylinder, 5, fully reflecting surface, 6, sphere, 7, the ring arcwall face, 8, taper seat, 9, the great circle anchor ring, 10, the roundlet anchor ring, 11, reflector cavity, 12, lens.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further details.
As shown in Figure 1, nonimaging optics lens for the automobile LED back-up lamp of the present invention adopt rotational symmetry structure, adopt mechanical integrated machine-shaping, led light source is positioned at the center, lower end of lens, these lens comprise the collimating structure of being made up of transmission plane 3 and fully reflecting surface 5, and transmission plane 3 and fully reflecting surface 5 become parallel light emergence with the optical alignment of the lambertian distribution that the LED back-up lamp sends; Connect airtight the light distribution structure of forming by a plurality of spheres 6, light distribution structure will carry out shaping by the directional light of collimating structure outgoing, and satisfy luminous intensity distribution light type; Hemispherical face 1, ring concave arc surface 2 and ring arcwall face 7 design in order to satisfy the minimum visible angle of LED back-up lamp, wherein hemispherical face 1 is sphere, do not change direction behind the light process hemispherical face 1 that the LED back-up lamp sends, and then by ring concave arc surface 2 with light refraction to the area of space of 30 °～45 ° on z axle, ring arcwall face 7 will diffuse to the area of space with 0～30 ° on z axle, the requirement of final meeting geometric visibility by a part of directional light of collimating structure outgoing.
Fully reflecting surface 5 in the present embodiment is in an inverted cone, hemispherical face 1 top edge is closely contacted on fully reflecting surface 5 lower limbs, ring concave arc surface 2 top edges are closely contacted on by taper seat 8 with hemispherical face 1 top edge, the edges at two ends of taper seat 8 is closely contacted on hemispherical face 1 top edge and ring concave arc surface 2 top edges respectively, transmission plane 3 and the face of cylinder 4 are arranged in the lens inner chamber, the face of cylinder 4 lower limbs are closely contacted on the junction of hemispherical face 1 top edge and fully reflecting surface 5 lower limbs, 3 one-tenth concave shaped of transmission plane, its edge is closely contacted on the face of cylinder 4 top edges, great circle anchor ring 9 lower limbs are closely contacted on fully reflecting surface 5 top edges, ring arcwall face 7 top edges are closely contacted on great circle anchor ring 9 top edges, its lower limb is closely contacted on roundlet anchor ring 10 lower limbs, the diameter of great circle anchor ring 9 and roundlet anchor ring 10 is on same straight line, identical and the diameter difference of their height, sphere 6 edges are closely contacted on roundlet anchor ring 10 top edges, the number of sphere 6 is decided according to the diameter of roundlet anchor ring 10, and present embodiment is said connects airtight the meaning for being by mechanical integrated machine-shaping between face in these lens and the face.
The refractive index of supposing the whole material therefor of nonimaging optics lens of the present invention is n, and as shown in Figure 2, the specific design method of transmission plane 3 is as follows: establish the some P on a certain curve on the transmission plane 3 1Coordinate be (x 1, z 1), i 1Be incident ray I and x axle clamp angle, α 1Be a P 1The tangent line T at place 1With x axle clamp angle, θ 1For the minimum angles of 3 incident ray I that can control of transmission plane, at a P 1Before get 1 P 1' (x 1-△ x, z 1-△ z), △ x wherein, △ z is very little amount, can think a P 1The tangent vector of ＇ place tangent line and some P 1The tangent vector of place's tangent line is identical, some P 1Can be regarded as this incident ray I of some place and P 1The intersection point of the tangent line at ＇ place has according to Snell's law:
As long as given starting point P 10(x 10, z 10), can obtain each point coordinates on the transmission plane 3 through the calculating that iterates, and then the face type of definite transmission plane 3, wherein the terminal point on the curve is designated as P 1end(x 1end, z 1end).
As shown in Figure 3, the specific design method of fully reflecting surface 5 is as follows: establish the some P on a certain curve on the fully reflecting surface 5 2Coordinate be (x 2, z 2), i 2Be incident ray I and x axle clamp angle, r is refracted ray R and the x axle clamp angle that enters lens after incident ray I reflects through the face of cylinder 4, α 2Be a P 2The tangent line T at place 2With x axle clamp angle, θ 1Be the minimum angles of 3 incident ray I that can control of transmission plane, θ 2For the minimum angles of 5 incident ray I that can control of fully reflecting surface, at a P 2Before get 1 P 2＇ (x 2-Δ x, z 2-Δ z), △ x wherein, △ z is very little amount, can think a P 2The tangent vector of ＇ place tangent line and some P 2The tangent vector of place's tangent line is identical, P 2Be this refracted ray R of some place and P 2The intersection point of the tangent line at ＇ place has according to Snell's law:
sin i 2 = n sin r θ 1 ≤ i 2 ≤ θ 2 α 2 = π 4 + r 2 x 20 = x 1 end Z 20 = x 20 tg θ 1 ;
As long as provide the starting point P of fully reflecting surface 5 20(x 20, z 20), can obtain each point coordinates on the fully reflecting surface 5 through the calculating that iterates, and then the face type of definite fully reflecting surface 5, wherein the terminal point on the curve is designated as P 2end(x 2end, z 2end), starting point P 20With terminal point P 1endAll on the face of cylinder 4, their coordinates on the x axle equate.
As shown in Figure 4, the specific design method of sphere 6 is as follows: the radius of curvature of each sphere 6 is R 3, the diameter of sphere 6 is L on the x direction x, the diameter of sphere 6 is L on the y direction y, parallel rays H impinges perpendicularly on the sphere 6, establishes that parallel rays H incidence angle is β on the x direction x, be θ through sphere 6 back emergent ray W and z axle clamp angle x, on the x direction, then have:
n sin β x = sin ( β x + θ x ) L x 2 R 3 = sin β x ;
Same on the y direction:
n sin β y = sin ( β y + θ y ) L y 2 R 3 = sin β y ;
As long as given θ x, θ yAnd L x, can calculate R 3And L y, can determine the face type of sphere 6.
As shown in Figure 5, the specific design method of ring arcwall face 7 is as follows: diffuse to after through ring arcwall face 7 through the part among the directional light H of fully reflecting surface 5 outgoing and become 0～30 ° area of space with the z axle, satisfy the requirement at the minimum visible angle of 0～30 ° of area of space, establish the some P on a certain curve on the ring arcwall face 7 4Coordinate be (x 4, z 4), ψ is the angle of emergent ray K and z axle, α 4Be P 4The tangent line T at place 4Angle with the x axle has according to Snell's law:
Figure BDA00002954302900054
As long as given starting point P 40(x 40, z 40), each point coordinates on the arcwall face 7 be can obtain encircling through the calculating that iterates, and then the face type of ring arcwall face 7, starting point P determined 40With terminal point P 2endCoordinate on the z axle equates that wherein the terminal point on the curve is designated as P 4end(x 4end, z 4end).
As shown in Figure 6, the specific design method of ring concave arc surface 2 is as follows: behind the incident ray I process hemispherical face 1 deviation does not take place, 2 places reflect at the ring concave arc surface, form emergent ray D, ring concave arc surface 2 is refracted to incident ray I and becomes 30 °～45 ° area of space with the z axle, satisfy the requirement at the minimum visible angle of 30 °～45 ° of area of space, hemispherical face 1 is R for radius 6Sphere, establish the some P on a certain curve on the ring concave arc surface 2 5Coordinate be (x 5, z 5), i 5Be incident ray I and x axle clamp angle, β is the angle of emergent ray D and z axle, α 5Be P 5The tangent line T at place 5With the angle of x axle, θ 2Minimum angles for 5 incident ray I that can control of fully reflecting surface has according to Snell's law:
Figure BDA00002954302900061
As long as given starting point P 50(x 50, z 50), calculate through iterating and can obtain encircling each point coordinates on the concave arc surface 2, and then determine the face type of ring concave arc surface 2, by the radius R of the hemispherical face 1 obtained 6, determine the face type of hemispherical face 1.
In the nonimaging optics lens in the present embodiment, adopt the LCWW5SM chip of OSRAM company as light source, polymethyl methacrylate (PMMA) is as lens material, and its wavelength is refractive index n=1.49 when 546.1nm, the incident ray minimum angles θ that 3 of transmission planes can be controlled 1Be 60 °, the incident ray minimum angles θ that 5 of fully reflecting surfaces can be controlled 2It is 30 °; According to " automobile and trailer back-up lamp luminous intensity distribution performance " (GB15235-2007) requirement, select θ x=45 °, θ y=10 °; Consider factors such as lens sizes and processing, L xBe defined as 4mm; Given transmission plane 3 starting point coordinate P 10(3,0) and sphere 6 starting point abscissa x 40=5mm; Iterative computation obtains the nonimaging optics lens for the automobile LED back-up lamp, its overall structure as shown in Figure 7, the high 7.96mm of these lens, diameter are 12.36mm.
Adopt 4 LED to be combined as the reversing automobile lamp with these lens, in TracePro software, design result is carried out analog simulation; The luminous intensity values of each test point as shown in Table 1, analog result all meets the requirement of GB15235-2007, wherein datum axis direction luminous intensity is 261cd.
Table one
Figure BDA00002954302900071
Figure BDA00002954302900081

Claims (3)

1. be used for the nonimaging optics lens of automobile LED back-up lamp, it is characterized in that these lens comprise by mechanical integrated machine-shaping:
Fully reflecting surface in an inverted cone (5);
The hemispherical face (1) that top edge and described fully reflecting surface (5) lower limb connect airtight;
The ring concave arc surface (2) that top edge and described hemispherical face (1) top edge connect airtight by taper seat (8), described taper seat (8) edges at two ends connect airtight with described hemispherical face (1) top edge and described ring concave arc surface (2) top edge respectively;
The face of cylinder (4) that connect airtight the junction of lower limb and described hemispherical face (1) and fully reflecting surface (5);
The edge is closely contacted on and is the transmission plane (3) of concave shaped with the described face of cylinder (4) top edge;
The great circle anchor ring (9) that lower limb and described fully reflecting surface (5) top edge connect airtight;
The ring arcwall face (7) that top edge and described great circle anchor ring (9) top edge connect airtight;
The roundlet anchor ring (10) that lower limb and described ring arcwall face (7) lower limb connect airtight;
The sphere (6) that the edge is closely contacted on described roundlet anchor ring (10) top edge, the number of described sphere (6) is decided according to the diameter of described roundlet anchor ring (10).
2. the nonimaging optics lens for the automobile LED back-up lamp according to claim 1 is characterized in that, the diameter of described great circle anchor ring (9) and roundlet anchor ring (10) is on same straight line, and both diameters are different and highly identical.
3. the nonimaging optics lens for the automobile LED back-up lamp according to claim 1 is characterized in that, the top edge of described fully reflecting surface (5) is the smaller diameter end of back taper, and lower limb is the larger diameter end of back taper.
CN2013100947793A 2013-03-22 2013-03-22 Non-imaging optical lens for LED (Light Emitting Diode) reversing light of car Pending CN103206669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013100947793A CN103206669A (en) 2013-03-22 2013-03-22 Non-imaging optical lens for LED (Light Emitting Diode) reversing light of car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013100947793A CN103206669A (en) 2013-03-22 2013-03-22 Non-imaging optical lens for LED (Light Emitting Diode) reversing light of car

Publications (1)

Publication Number Publication Date
CN103206669A true CN103206669A (en) 2013-07-17

Family

ID=48753987

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013100947793A Pending CN103206669A (en) 2013-03-22 2013-03-22 Non-imaging optical lens for LED (Light Emitting Diode) reversing light of car

Country Status (1)

Country Link
CN (1) CN103206669A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103453450A (en) * 2013-08-19 2013-12-18 易美芯光（北京）科技有限公司 Refraction and reflection light emitting device
CN105570832A (en) * 2014-10-15 2016-05-11 比亚迪股份有限公司 Led lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201531819U (en) * 2009-07-16 2010-07-21 江苏伯乐达光电科技有限公司 led streetlight lens
CN102162624A (en) * 2011-04-08 2011-08-24 佛山市中山大学研究院 Lens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201531819U (en) * 2009-07-16 2010-07-21 江苏伯乐达光电科技有限公司 led streetlight lens
CN102162624A (en) * 2011-04-08 2011-08-24 佛山市中山大学研究院 Lens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王尧等: "基于非成像光学的发光二极管汽车后转向灯透镜设计", 《中国光学》, vol. 5, no. 5, 31 October 2012 (2012-10-31), pages 500 - 503 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103453450A (en) * 2013-08-19 2013-12-18 易美芯光（北京）科技有限公司 Refraction and reflection light emitting device
CN105570832A (en) * 2014-10-15 2016-05-11 比亚迪股份有限公司 Led lens
CN105570832B (en) * 2014-10-15 2019-05-17 比亚迪股份有限公司 LED lens

Similar Documents

Publication Publication Date Title
CN204187477U (en) Light fixture
CN102734673A (en) Light-emitting diode (LED) illumination module
CN201228918Y (en) Distributing lens of LED street lamp
CN107664279A (en) A kind of LED flat lamp lens and LED light source
CN103206668A (en) Free-form surface lens for projection-type light emitting diode (LED) automobile dipped headlight
CN103912809B (en) Zigzag type LED illumination optical system
CN103363443B (en) A kind of total reflection lens and forming method thereof
CN103629614B (en) LED car high beam
CN204005732U (en) Large visual field corner LED illuminating lens
CN103206669A (en) Non-imaging optical lens for LED (Light Emitting Diode) reversing light of car
CN103912845B (en) Big angle of visual field LED illumination lens
CN105589991A (en) Design method of free-form surface integrated optical lens used for LED (Light Emitting Diode) motorcycle headlamp
CN103047607B (en) Manufacture method of free-curved-surface lens for LED collimation
CN104765136A (en) optical collimated system for circular LED area light source
CN102748709B (en) Full-reflection lens and LED (Light-Emitting Diode) lamp using same
CN205316246U (en) Optical lens that LED car front fog lamp was used
CN203363991U (en) LED (light-emitting diode) secondary optical lens
CN107448781B (en) LED collimation uniform lighting structure for rectangular car lamp modeling and implementation method thereof
CN203823656U (en) Low-angle lens used for light distribution of multiple LEDs and lamp thereof
CN203082793U (en) Free-form surface lens for projection-type light-emitting diode (LED) automobile dipped headlight
TW201139935A (en) An LED lighting device and the asymmetric lamp cup thereof
CN104676467A (en) Lens and LED (light emitting diode) lamp with lens
CN203893069U (en) Optical system for uniformly collimating LED (light-emitting diode)
CN203797560U (en) Light emitting diode lens and lighting device
CN203744072U (en) LED auto high beam

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20130717