CN105650565B - Car headlamp and manufacturing method - Google Patents
Car headlamp and manufacturing method Download PDFInfo
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- CN105650565B CN105650565B CN201511027424.8A CN201511027424A CN105650565B CN 105650565 B CN105650565 B CN 105650565B CN 201511027424 A CN201511027424 A CN 201511027424A CN 105650565 B CN105650565 B CN 105650565B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 66
- 238000013461 design Methods 0.000 claims abstract description 15
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 19
- 238000002834 transmittance Methods 0.000 claims description 15
- 238000005457 optimization Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 description 11
- 238000005286 illumination Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 8
- 238000009826 distribution Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 230000009194 climbing Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012905 input function Methods 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 238000002922 simulated annealing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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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
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The present invention provides a kind of car headlamp and manufacturing methods, the car headlamp includes dipped beam LED light source, distance light LED light source, convergent lens group, diffraction optical element, distance-light isolation module, the light that the convergent lens group is emitted the dipped beam LED light source and the distance light LED light source is into line convergence, the diffraction optical element is equipped with dipped beam area and distance light area, the dipped beam area corresponds to the dipped beam LED light source outgoing beam, and the distance light area corresponds to the distance light LED light source outgoing beam；The distance-light isolation module makes the high beam after the convergence of distance light LED light source outgoing be irradiated in the distance light area of diffraction optical element, the dipped beam after the convergence of dipped beam LED light source outgoing is irradiated in the dipped beam area of diffraction optical element for high beam and dipped beam to be isolated.The beneficial effects of the invention are as follows：The car headlamp of the present invention is small, light, structure design is simple, at low cost.
Description
Technical field
The present invention relates to technical field of automobile illumination more particularly to car headlamp and manufacturing methods.
Background technology
LED light source because its energy-efficient, small, long lifespan, spectrum is narrow, adjustable color and shock resistance are strong the advantages that,
It has been widely used in the illumination of automobile.Currently, the design of LED headlamps mainly uses LED light and other optical modules
Reflective curved surface light distributing system either transmission-type light distributing system is formed, by the adjusting to optical module, realization reaches specific
It is required that intensity of illumination distribution, to meet requirement for LED headlamp national standards.Above two class designs good automobile LED
Headlamp light distributing system can generally meet the requirement of national standard：In the vertical plane light distribution apart from headlamp reference center 25m
Screen, meet specific region each point, area illumination requirement.However, there is also many shortcomings for the above two classes design：First,
The headlamp of design is not bulky, light；Second, design structure is complicated, generally there are multiple aspherical optical elements very
To freeform optics element；Third, design cost is high.
Invention content
The present invention provides a kind of car headlamp, including dipped beam LED light source, distance light LED light source, convergent lens group, spread out
Optical element, distance-light isolation module are penetrated, the convergent lens group goes out the dipped beam LED light source and the distance light LED light source
The light penetrated is equipped with dipped beam area and distance light area into line convergence, the diffraction optical element, and the dipped beam area corresponds to the dipped beam LED light
Source outgoing beam, the distance light area correspond to the distance light LED light source outgoing beam；The distance-light isolation module is remote for being isolated
Light beam and dipped beam make the high beam after the convergence of distance light LED light source outgoing be irradiated in the distance light area of diffraction optical element, dipped beam
Dipped beam after the convergence of LED light source outgoing is irradiated in the dipped beam area of diffraction optical element.
As a further improvement on the present invention, the dipped beam LED light source and the distance light LED light source are arranged above and below.
As a further improvement on the present invention, the convergent lens group is made of non-spherical reflector and refractor group.
The present invention also provides a kind of manufacturing method of car headlamp, the mother matrix of the diffraction optical element is transferred to
Diffraction optical element is obtained on bright heat resistant substrates material.
As a further improvement on the present invention, the diffraction optical element is portrayed using the method or machinery of substep alignment
The method of processing obtains mother matrix.
As a further improvement on the present invention, the light transmittance function in the dipped beam area of the diffraction optical element calculates：According to
Input face complex amplitude function INN, with dipped beam output function ION, using the optimization algorithm based on positive Diffraction Transformation, optimization calculates
Obtain the discrete transmittance function TN in the dipped beam area of diffraction optical element；The transmitance in the distance light area of the diffraction optical element
Function calculates：According to input face complex amplitude function INF, and amplitude object function IOF, using the optimization based on positive Diffraction Transformation
The discrete transmittance function TF in the distance light area of diffraction optical element is calculated in algorithm, optimization.
As a further improvement on the present invention, by the transmittance function TN and diffraction optics in the dipped beam area of diffraction optical element
The transmittance function TF in the distance light area of element carries out discretization, and according to the refractive index n of base material, phase function is converted to
Step height function, every 2 π corresponding height are λ/(n-1), and wherein λ is design optical wavelength used.
As a further improvement on the present invention, it is described it is discrete be 4 steps or 8 steps.
As a further improvement on the present invention, the transmitance of test convergent lens group is t1, the diffraction of diffraction optical element
Efficiency is t2, according in national standard on objective plane the largest light intensity I1 in dipped beam area requirement, then the center of dipped beam LED light source goes out
It is I1 × a/t2/t1 to penetrate light intensity.
As a further improvement on the present invention, the transmitance of test convergent lens group is t1, the diffraction of diffraction optical element
Efficiency is t2, according in national standard on objective plane the largest light intensity I2 in distance light area requirement, then the center of distance light LED light source goes out
It is I2 × b/t2/t1 to penetrate light intensity.
The beneficial effects of the invention are as follows：The present invention undertakes the focal power of system with traditional catadioptric optical element, uses
Flexible design, diffraction optical element easy to process carry out shaping to light beam.Compared with traditional freeform optics element, spread out
Design method, the manufacturing method all comparative maturities of optical element are penetrated, difficulty is also lower.Diffraction optical element belongs to planar wave member
Part, entire car headlamp are more frivolous.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is the diffraction optical element schematic diagram of the present invention.
Specific implementation mode
As shown in Figure 1, 2, the invention discloses a kind of car headlamps, including dipped beam LED light source 101, distance light LED light source
102, convergent lens group 110, diffraction optical element 120, distance-light isolation module 130, the convergent lens group 110 is to described close
Into line convergence, the diffraction optical element 120 is equipped with dipped beam for light LED light source 101 and the light of the distance light LED light source 102 outgoing
Area 121 and distance light area 122, the dipped beam area 121 correspond to 101 outgoing beam of dipped beam LED light source, and the distance light area 122 is right
Answer 102 outgoing beam of distance light LED light source；The distance-light isolation module 130 makes remote for high beam and dipped beam to be isolated
High beam after the convergence that light LED light source 102 is emitted is irradiated in the distance light area 122 of diffraction optical element 120, dipped beam LED light source
Dipped beam after the convergence of 101 outgoing is irradiated in the dipped beam area 121 of diffraction optical element 120.
The dipped beam LED light source 101 and the distance light LED light source 102 are arranged above and below.
The convergent lens group 110 is made of non-spherical reflector and refractor group.
According to standard GB/T 25991-2010, in the vertical plane away from headlamp center 25m, (hereinafter referred to as " target is flat
Face "), it is 3960mm to width, the Illumination Distribution in the rectangular area of a height of 3500mm is distinctly claimed.So concentrated lens
Beam divergence angle should be at least 2 × asin (2/25)=9.2 degree, it is preferable that dispersion angle is 9.5 degree, 10 degree or 12 degree.
Dipped beam sampling plan：On objective plane, generation sampling plan, this sampling plan, including HV in national standard,
B50L, 75R, 75L, 50L, 25L, 50V, 50R, 25R wait several points, and areas VI required to light distribution, and need to meet and adopt
Batten part.
Dipped beam output function：According to the launch angle of light beam, by HV, B50L, 75R, 75L, 50L, 25L in national standard,
50V, 50R, 25R wait several points, and with the I required to light distribution, the illumination requirement of II, III, the areas VI are converted into light intensity, using slotting
Value method, including but not limited to linear interpolation, polynomial interopolation, Spline interpolation etc. obtain the light intensity of other sampled points, to
The light intensity output function on objective plane is generated, then is extracted square root to it, discrete amplitude output function, further normalizing are obtained
Change, obtains normalized discrete amplitude output function ION.
Dipped beam input function：According to the launch angle of light beam, the complex amplitude function on 120 face of diffraction optical element is calculated,
It is sampled under the premise of meeting sampling condition, discrete input face complex amplitude function is obtained, further it is carried out
Normalization, obtains normalized discrete input face complex amplitude function INN.
121 transmittance function in the dipped beam area of diffraction optical element 120 calculates：According to input face complex amplitude function INN,
With dipped beam output function ION, using the optimization algorithm based on positive Diffraction Transformation, including but not limited to simulated annealing, lose
The 121 discrete transmitance in the dipped beam area of diffraction optical element 120 is calculated in the methods of propagation algorithm, climbing method, optimization
Function TN.Notice that its object function is not dipped beam amplitude output function ION, but the multiple a × ION, a of ION are positive real number,
It is determined by calculating process.
Distance light sampling plan：On objective plane, sampling plan, this sampling plan, including HV in national standard, HV are generated
Point needs to meet sampling condition to 1125L and R, HV points to several regions such as 2250L and R.
Distance light output function：According to the dispersion angle of light beam, by the HV points in national standard, HV points to 1125L and R, HV
Point to the illumination requirement of 2250L and R, maximal illumination is converted into light intensity, using interpolation method, including but not limited to linear interpolation, more
Item formula interpolation, Spline interpolation etc., obtain the light intensity of other sampled points, and letter is exported to generate the light intensity on objective plane
Number, then extract square root to it, discrete amplitude output function is obtained, further requires to normalize according to peak swing, obtains normalizing
The discrete amplitude output function IOF changed.
Distance light input function：According to the launch angle of light beam, the complex amplitude function on 120 face of diffraction optical element is calculated,
It is sampled under the premise of meeting sampling condition, discrete input face complex amplitude function is obtained, further it is carried out
Normalization, obtains normalized discrete input face complex amplitude function INF.
The transmittance function in the distance light area 122 of diffraction optical element 120 calculates：According to input face complex amplitude function INF, with
Amplitude object function IOF, using the optimization algorithm based on positive Diffraction Transformation, including but not limited to simulated annealing, heredity
The discrete transmittance function TF in the distance light area 122 of diffraction optical element 120 is calculated in the methods of algorithm, climbing method, optimization.
Notice that its object function is not distance light amplitude output function IOF, but the multiple b × ION, b of IOF are positive real number, by calculating
Process determines.
The invention also discloses a kind of manufacturing methods of car headlamp, specially：
According to processing conditions and diffraction efficiency requirement, by the transmittance function TN in the dipped beam area 121 of diffraction optical element 120
Discretization is carried out with the transmittance function TF in the distance light area 122 of diffraction optical element 120, it is preferable that discrete is 4 steps or 8
Rank.And according to the refractive index n of base material, phase function is converted into step height function, every 2 π corresponding height be λ/
(n-1), wherein λ is design optical wavelength used.
The processing of diffraction optical element 120：Preferably, the method for processing being portrayed using the method for substep alignment or machinery
Mother matrix is obtained, mother matrix is transferred to the diffraction optical element 120 for obtaining batch on transparency and heat-proof base material.
Determine the 101 center output intensity requirement of dipped beam LED light source：The transmitance for testing convergent lens group 110 is t1, diffraction
The diffraction efficiency of optical element be t2, according in national standard on objective plane the largest light intensity I1 in dipped beam area requirement, then dipped beam
The center output intensity of LED light source 101 is I1 × a/t2/t1.
Determine the 102 center output intensity requirement of distance light LED light source：The transmitance for testing convergent lens group 110 is t1, diffraction
The diffraction efficiency of optical element 120 be t2, according in national standard on objective plane the largest light intensity I2 in distance light area requirement, then far
The center output intensity of light LED light source 102 is I2 × b/t2/t1.
The technical advantages of the present invention are that：The focal power that system is undertaken with traditional catadioptric optical element, with design
Flexibly, diffraction optical element 120 easy to process carries out shaping to light beam.Compared with traditional freeform optics element, spread out
Design method, the manufacturing method all comparative maturities of optical element 120 are penetrated, difficulty is also lower.Diffraction optical element 120 belongs to plane
Optical element, entire car headlamp are more frivolous.
The present invention undertakes system focal power using catadioptric optical system, and light intensity shaping is carried out with diffraction optical element 120,
Reach the scheme for meeting national standard and desired light as requested.Diffraction optical element 120 sets in the car headlamp of the present invention
Meter method is converted into light intensity according to the requirement of objective plane illuminance, generates sampling grid, carries out Phase Restoration, this whole series is set
Meter design.Sampling condition therein, optimization algorithm are traditional technologies.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention's
Protection domain.
Claims (10)
1. a kind of car headlamp, it is characterised in that：Including dipped beam LED light source, distance light LED light source, convergent lens group, diffraction light
Element, distance-light isolation module are learned, the convergent lens group is emitted the dipped beam LED light source and the distance light LED light source
Light is equipped with dipped beam area and distance light area into line convergence, the diffraction optical element, and the dipped beam area corresponds to the dipped beam LED light source and goes out
Irradiating light beam, the distance light area correspond to the distance light LED light source outgoing beam；The distance-light isolation module is for being isolated high beam
With dipped beam, the high beam after the convergence of distance light LED light source outgoing is made to be irradiated in the distance light area of diffraction optical element, dipped beam LED
Dipped beam after the convergence of light source outgoing is irradiated in the dipped beam area of diffraction optical element.
2. car headlamp according to claim 1, it is characterised in that：The dipped beam LED light source and the distance light LED light
Source is arranged above and below.
3. car headlamp according to claim 1, it is characterised in that：The convergent lens group by non-spherical reflector with
Refractor group forms.
4. a kind of manufacturing method of any one of claims 1 to 3 car headlamp, it is characterised in that：The diffraction optics
The mother matrix of element is transferred on transparency and heat-proof base material and obtains diffraction optical element.
5. manufacturing method according to claim 4, it is characterised in that：The diffraction optical element uses the side of substep alignment
The method that method or machinery portray processing obtains mother matrix.
6. manufacturing method according to claim 4, it is characterised in that：The light transmittance in the dipped beam area of the diffraction optical element
Function calculates：According to input face complex amplitude function INN, and dipped beam output function ION, using the optimization based on positive Diffraction Transformation
The discrete transmittance function TN in the dipped beam area of diffraction optical element is calculated in algorithm, optimization；The diffraction optical element
The transmittance function in distance light area calculates：According to input face complex amplitude function INF, and amplitude object function IOF, using based on forward direction
The discrete transmittance function TF in the distance light area of diffraction optical element is calculated in the optimization algorithm of Diffraction Transformation, optimization.
7. manufacturing method according to claim 6, it is characterised in that：By the transmitance letter in the dipped beam area of diffraction optical element
The transmittance function TF in the distance light area of number TN and diffraction optical element carries out discretization, and according to the refractive index n of base material, will
Phase function is converted to step height function, and every 2 π corresponding height are λ/(n-1), and wherein λ is design optical wavelength used.
8. manufacturing method according to claim 7, it is characterised in that：It is described it is discrete be 4 steps or 8 steps.
9. manufacturing method according to claim 4, it is characterised in that：The transmitance for testing convergent lens group is t1, diffraction
The diffraction efficiency of optical element be t2, according in national standard on objective plane the largest light intensity I1 in dipped beam area requirement, then dipped beam
The center output intensity of LED light source is I1 × a/t2/t1, and a is positive real number.
10. manufacturing method according to claim 4, it is characterised in that：The transmitance for testing convergent lens group is t1, diffraction
The diffraction efficiency of optical element be t2, according in national standard on objective plane the largest light intensity I2 in distance light area requirement, then distance light
The center output intensity of LED light source is I2 × b/t2/t1, and b is positive real number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027424.8A CN105650565B (en) | 2015-12-30 | 2015-12-30 | Car headlamp and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027424.8A CN105650565B (en) | 2015-12-30 | 2015-12-30 | Car headlamp and manufacturing method |
Publications (2)
| Publication Number | Publication Date |
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| CN105650565A CN105650565A (en) | 2016-06-08 |
| CN105650565B true CN105650565B (en) | 2018-08-28 |
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| CN201511027424.8A Expired - Fee Related CN105650565B (en) | 2015-12-30 | 2015-12-30 | Car headlamp and manufacturing method |
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| CN110454747A (en) * | 2018-05-07 | 2019-11-15 | 欧司朗有限公司 | Lighting device |
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| CN2679856Y (en) * | 2004-02-18 | 2005-02-16 | 上海金桥大晨光电科技有限公司 | Large power LED element |
| US20080089072A1 (en) * | 2006-10-11 | 2008-04-17 | Alti-Electronics Co., Ltd. | High Power Light Emitting Diode Package |
| US20120043886A1 (en) * | 2010-08-18 | 2012-02-23 | Hua Ji | Integrated Heat Conductive Light Emitting Diode (LED) White Light Source Module |
| CN102364685A (en) * | 2011-06-17 | 2012-02-29 | 杭州华普永明光电股份有限公司 | Lead-free LED (Light-Emitting Diode) module and manufacturing process thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180828 |