CN105650565A - Automobile headlamp and manufacturing method thereof - Google Patents
Automobile headlamp and manufacturing method thereof Download PDFInfo
- Publication number
- CN105650565A CN105650565A CN201511027424.8A CN201511027424A CN105650565A CN 105650565 A CN105650565 A CN 105650565A CN 201511027424 A CN201511027424 A CN 201511027424A CN 105650565 A CN105650565 A CN 105650565A
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- optical element
- light source
- diffraction optical
- dipped beam
- district
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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-F21S41/28
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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
-
- 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
Abstract
The invention provides an automobile headlamp and a manufacturing method thereof. The automobile headlamp comprises a low beam LED (light emitting diode) light source, a high beam LED light source, a convergent lens assembly, a diffraction optical component and low and high beam isolation modules, wherein the convergent lens assembly is used for converging beams emitted from the low beam LED light source and the high beam LED light source; the diffraction optical component is provided with a low beam zone and a high beam zone; the low beam zone corresponds to the beams emitted from the low beam LED light source; the high beam zone corresponds to the beams emitted from the high beam LED light source; and the low and high beam isolation modules are used for isolating the high beams and the low beams, so that the converged high beams emitted from the high beam LED light source illuminate the high beam zone of the diffraction optical component, and the converged low beams emitted from the low beam LED light source illuminate the low beam zone of the diffraction optical component. The automobile headlamp has the beneficial effects that the automobile headlamp provided by the invention is light and convenient, and is small in size, simple in structural design and low in cost.
Description
Technical field
The present invention relates to technical field of automobile illumination, particularly relate to car headlamp and manufacture method.
Background technology
LED/light source because it is energy-efficient, volume is little, life-span length, spectrum are narrow, adjustable color and the advantage such as shock resistance is strong, be widely used in the illumination of automobile. Currently, the design of LED headlamp mainly adopts LED and other optical modules to form reflective curved surface light distributing system or transmission-type light distributing system, by the adjustment to optical module, it is achieved reach the intensity of illumination distribution of specific requirement, to meet the requirement for LED headlamp national standard. Above two classes design the requirement that good automobile LED headlamp light distributing system generally can meet national standard: at the vertical plane photometric screen of distance headlamp reference center 25m, meet the illumination requirement in specific region each point, district. But, above two classes design also there is many weak points: its one, the headlamp of design is bulky, not light; Its two, project organization is complicated, generally there is the optical element even freeform optics element of multiple aspheric surface; Its three, design cost height.
Summary of the invention
The present invention provides a kind of car headlamp, comprise dipped beam LED/light source, distance light LED/light source, positive lens group, diffraction optical element, far and near light isolation module, the light of described dipped beam LED/light source and described distance light LED/light source outgoing is assembled by described positive lens group, described diffraction optical element is provided with dipped beam district and distance light district, the corresponding described dipped beam LED/light source outgoing beam in described dipped beam district, the corresponding described distance light LED/light source outgoing beam in described distance light district; Described far and near light isolation module is for isolating distance light bundle and dipped beam, making the distance light bundle after the convergence of distance light LED/light source outgoing be irradiated in the distance light district of diffraction optical element, the dipped beam after the convergence of dipped beam LED/light source outgoing is irradiated in the dipped beam district of diffraction optical element.
As a further improvement on the present invention, described dipped beam LED/light source and described distance light LED/light source are arranged above and below.
As a further improvement on the present invention, described positive lens group is made up of non-spherical reflector and refractor group.
Present invention also offers the manufacture method of a kind of car headlamp, the mother matrix of described diffraction optical element is transferred on transparency and heat-proof base material to obtain diffraction optical element.
As a further improvement on the present invention, the method that described diffraction optical element adopts the substep method of alignment or machinery to portray processing obtains mother matrix.
As a further improvement on the present invention, the transmittance function in the dipped beam district of described diffraction optical element calculates: according to input side complex amplitude function INN, function ION is exported with dipped beam, adopt based on just to the optimization algorithm of Diffraction Transformation, computation optimization obtains the discrete transmittance function TN in the dipped beam district of diffraction optical element; The transmittance function in the distance light district of described diffraction optical element calculates: according to input side complex amplitude function INF, with amplitude objective function IOF, adopt based on just to the optimization algorithm of Diffraction Transformation, computation optimization obtains the discrete transmittance function TF in the distance light district of diffraction optical element.
As a further improvement on the present invention, the transmittance function TF of the transmittance function TN in the dipped beam district of diffraction optical element and the distance light district of diffraction optical element is carried out discretize, and the specific refractory power n according to base material, position phase function is converted to bench height function, every 2 corresponding height in �� position are ��/(n-1), and wherein �� designs optical wavelength used.
As a further improvement on the present invention, described discrete be 4 steps or 8 steps.
As a further improvement on the present invention, the transmitance of test positive lens group is t1, the diffraction efficiency of diffraction optical element is t2, and according to the requirement of the largest light intensity I1 in dipped beam district on objective plane in GB, so the center output intensity of dipped beam LED/light source is I1 �� a/t2/t1.
As a further improvement on the present invention, the transmitance of test positive lens group is t1, the diffraction efficiency of diffraction optical element is t2, and according to the requirement of the largest light intensity I2 in distance light district on objective plane in GB, so the center output intensity of distance light LED/light source is I2 �� b/t2/t1.
The invention has the beneficial effects as follows: the present invention undertakes the focal power of system with traditional catadioptric optical element, with flexible design, diffraction optical element easy to process, light beam is carried out shaping. Compared with traditional freeform optics element, method of design, the manufacture method of diffraction optical element are all more ripe, and difficulty is also lower. Diffraction optical element belongs to planar optical elements, and whole car headlamp is more frivolous.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the diffraction optical element schematic diagram of the present invention.
Embodiment
As shown in Figure 1, 2, the present invention discloses a kind of car headlamp, comprise dipped beam LED/light source 101, distance light LED/light source 102, positive lens group 110, diffraction optical element 120, far and near light isolation module 130, the light of described dipped beam LED/light source 101 and the outgoing of described distance light LED/light source 102 is assembled by described positive lens group 110, described diffraction optical element 120 is provided with dipped beam district 121 and distance light district 122, corresponding described dipped beam LED/light source 101 outgoing beam in described dipped beam district 121, corresponding described distance light LED/light source 102 outgoing beam in described distance light district 122; Described far and near light isolation module 130 is for isolating distance light bundle and dipped beam, making the distance light bundle after the convergence of distance light LED/light source 102 outgoing be irradiated in the distance light district 122 of diffraction optical element 120, the dipped beam after the convergence of dipped beam LED/light source 101 outgoing is irradiated in the dipped beam district 121 of diffraction optical element 120.
Described dipped beam LED/light source 101 and described distance light LED/light source 102 are arranged above and below.
Described positive lens group 110 is made up of non-spherical reflector and refractor group.
According to standard GB/T 25991-2010, in the vertical plane (hereinafter referred to as " objective plane ") apart from headlamp center 25m, being 3960mm to width, the Illumination Distribution in the high rectangular area for 3500mm has clearly requirement. So should be at least 2 �� asin (2/25)=9.2 degree through the beam divergence angle of positive lens, it may be preferred that dispersion angle is 9.5 degree, 10 degree, or 12 degree.
Dipped beam sampling scheme: on objective plane, generate sampling scheme, this scheme of sampling, comprises HV, B50L, 75R, 75L, 50L, 25L, 50V, 50R, 25R in GB requirement, waits several points, with the VI district that luminous intensity distribution has requirement, and need to meet sampling condition.
Dipped beam exports function: according to the emission angle of light beam, HV during GB is required, B50L, 75R, 75L, 50L, 25L, 50V, 50R, 25R, etc. several points, with the I that luminous intensity distribution is had requirement, II, III, the illumination requirement in VI district is converted into light intensity, adopt method of interpolation, include but not limited to linear interpolation, polynomial interpolation, Spline interpolation etc., obtain the light intensity of other sampling point, thus generate the light intensity on objective plane and export function, again it is opened square, obtain discrete amplitude and export function, further normalization method, obtain normalized discrete amplitude and export function ION.
Dipped beam input function: according to the emission angle of light beam, calculate the complex amplitude function on diffraction optical element 120, under the prerequisite meeting sampling condition, it is sampled, obtain discrete input side complex amplitude function, further it is normalized, obtains normalized discrete input side complex amplitude function INN.
The transmittance function of the 121 of the dipped beam district of diffraction optical element 120 calculates: according to input side complex amplitude function INN, function ION is exported with dipped beam, adopt based on just to the optimization algorithm of Diffraction Transformation, including but not limited to the methods such as simulated annealing, genetic algorithm, climbing method, computation optimization obtains the discrete transmittance function TN of the 121 of the dipped beam district of diffraction optical element 120. Notice that its objective function is not that dipped beam amplitude exports function ION, but the multiple a �� ION of ION, a is arithmetic number, determines by computation process.
Distance light sampling scheme: on objective plane, generate sampling scheme, this scheme of sample, comprising HV, HV point in GB requirement, to 1125L and R, HV point to several regions such as 2250L and R, and needs to meet sampling condition.
Distance light exports function: according to the dispersion angle of light beam, HV point during GB is required, HV point is to 1125L and R, HV point to the illumination requirement of 2250L and R, maximum illumination is converted into light intensity, adopt method of interpolation, include but not limited to linear interpolation, polynomial interpolation, Spline interpolation etc., obtain the light intensity of other sampling point, thus generate the light intensity on objective plane and export function, again it is opened square, obtain discrete amplitude and export function, further according to maximum amplitude requirement normalization method, obtain normalized discrete amplitude and export function IOF.
Distance light input function: according to the emission angle of light beam, calculate the complex amplitude function on diffraction optical element 120, under the prerequisite meeting sampling condition, it is sampled, obtain discrete input side complex amplitude function, further it is normalized, obtains normalized discrete input side complex amplitude function INF.
The transmittance function in the distance light district 122 of diffraction optical element 120 calculates: according to input side complex amplitude function INF, with amplitude objective function IOF, adopt based on just to the optimization algorithm of Diffraction Transformation, including but not limited to the methods such as simulated annealing, genetic algorithm, climbing method, computation optimization obtains the discrete transmittance function TF in the distance light district 122 of diffraction optical element 120.Notice that its objective function is not that distance light amplitude exports function IOF, but the multiple b �� ION of IOF, b is arithmetic number, determines by computation process.
The invention also discloses the manufacture method of a kind of car headlamp, it be specially:
According to processing conditions and diffraction efficiency requirement, the transmittance function TF of the transmittance function TN in the dipped beam district 121 of diffraction optical element 120 and the distance light district 122 of diffraction optical element 120 is carried out discretize, it may be preferred that discrete is 4 steps or 8 steps. And the specific refractory power n according to base material, position phase function is converted to bench height function, every 2 corresponding height in �� position are ��/(n-1), and wherein �� designs optical wavelength used.
The processing of diffraction optical element 120: preferably, the method that processing portrayed by the method for employing substep alignment or machinery obtains mother matrix, is transferred to by mother matrix on transparency and heat-proof base material and obtains diffraction optical element 120 in batches.
Determine the output intensity requirement of dipped beam LED/light source 101 center: the transmitance of test positive lens group 110 is t1, the diffraction efficiency of diffraction optical element is t2, requirement according to the largest light intensity I1 in dipped beam district on objective plane in GB, so the center output intensity of dipped beam LED/light source 101 is I1 �� a/t2/t1.
Determine the output intensity requirement of distance light LED/light source 102 center: the transmitance of test positive lens group 110 is t1, the diffraction efficiency of diffraction optical element 120 is t2, requirement according to the largest light intensity I2 in distance light district on objective plane in GB, so the center output intensity of distance light LED/light source 102 is I2 �� b/t2/t1.
The technical superiority of the present invention is: the focal power undertaking system with traditional catadioptric optical element, with flexible design, diffraction optical element 120 easy to process, light beam is carried out shaping. Compared with traditional freeform optics element, method of design, the manufacture method of diffraction optical element 120 are all more ripe, and difficulty is also lower. Diffraction optical element 120 belongs to planar optical elements, and whole car headlamp is more frivolous.
The present invention adopts catadioptric optical system to undertake system focal power, carries out light intensity shaping with diffraction optical element 120, reaches the scheme meeting national standard and desired light as requested. In the car headlamp of the present invention, the method for design of diffraction optical element 120 is according to the requirement of objective plane illuminance, is converted into light intensity, generates sampling grid, carries out Phase Restoration, this whole set of design design. Sampling condition, optimization algorithm wherein are conventional arts.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations. For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a car headlamp, it is characterized in that: comprise dipped beam LED/light source, distance light LED/light source, positive lens group, diffraction optical element, far and near light isolation module, the light of described dipped beam LED/light source and described distance light LED/light source outgoing is assembled by described positive lens group, described diffraction optical element is provided with dipped beam district and distance light district, the corresponding described dipped beam LED/light source outgoing beam in described dipped beam district, the corresponding described distance light LED/light source outgoing beam in described distance light district; Described far and near light isolation module is for isolating distance light bundle and dipped beam, making the distance light bundle after the convergence of distance light LED/light source outgoing be irradiated in the distance light district of diffraction optical element, the dipped beam after the convergence of dipped beam LED/light source outgoing is irradiated in the dipped beam district of diffraction optical element.
2. car headlamp according to claim 1, it is characterised in that: described dipped beam LED/light source and described distance light LED/light source are arranged above and below.
3. car headlamp according to claim 1, it is characterised in that: described positive lens group is made up of non-spherical reflector and refractor group.
4. the manufacture method of a car headlamp, it is characterised in that: the mother matrix of described diffraction optical element is transferred on transparency and heat-proof base material to obtain diffraction optical element.
5. manufacture method according to claim 4, it is characterised in that: the method that processing portrayed by the method for described diffraction optical element employing substep alignment or machinery obtains mother matrix.
6. manufacture method according to claim 4, it is characterized in that: the transmittance function in the dipped beam district of described diffraction optical element calculates: according to input side complex amplitude function INN, function ION is exported with dipped beam, adopt based on just to the optimization algorithm of Diffraction Transformation, computation optimization obtains the discrete transmittance function TN in the dipped beam district of diffraction optical element; The transmittance function in the distance light district of described diffraction optical element calculates: according to input side complex amplitude function INF, with amplitude objective function IOF, adopt based on just to the optimization algorithm of Diffraction Transformation, computation optimization obtains the discrete transmittance function TF in the distance light district of diffraction optical element.
7. manufacture method according to claim 6, it is characterized in that: the transmittance function TF of the transmittance function TN in the dipped beam district of diffraction optical element and the distance light district of diffraction optical element is carried out discretize, and the specific refractory power n according to base material, position phase function is converted to bench height function, every 2 corresponding height in �� position are ��/(n-1), and wherein �� designs optical wavelength used.
8. manufacture method according to claim 7, it is characterised in that: described discrete be 4 steps or 8 steps.
9. manufacture method according to claim 4, it is characterized in that: the transmitance of test positive lens group is t1, the diffraction efficiency of diffraction optical element is t2, requirement according to the largest light intensity I1 in dipped beam district on objective plane in GB, so the center output intensity of dipped beam LED/light source is I1 �� a/t2/t1.
10. manufacture method according to claim 4, it is characterized in that: the transmitance of test positive lens group is t1, the diffraction efficiency of diffraction optical element is t2, requirement according to the largest light intensity I2 in distance light district on objective plane in GB, so the center output intensity of distance light LED/light source is I2 �� b/t2/t1.
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 |
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| Publication Number | Publication Date |
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| CN105650565A true CN105650565A (en) | 2016-06-08 |
| CN105650565B CN105650565B (en) | 2018-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454747A (en) * | 2018-05-07 | 2019-11-15 | 欧司朗有限公司 | Lighting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2015
- 2015-12-30 CN CN201511027424.8A patent/CN105650565B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454747A (en) * | 2018-05-07 | 2019-11-15 | 欧司朗有限公司 | Lighting device |
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| CN105650565B (en) | 2018-08-28 |
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