CN105042511A - Method for forming free-form surfaces of optical lenses of LED motorcycle headlamp - Google Patents
Method for forming free-form surfaces of optical lenses of LED motorcycle headlamp Download PDFInfo
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- CN105042511A CN105042511A CN201510502337.7A CN201510502337A CN105042511A CN 105042511 A CN105042511 A CN 105042511A CN 201510502337 A CN201510502337 A CN 201510502337A CN 105042511 A CN105042511 A CN 105042511A
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- curve
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- energy
- multisection type
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/046—Refractors for light sources of lens shape the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring
-
- 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
- F21W2107/13—Use or application of lighting devices on or in particular types of vehicles for land vehicles for cycles
- F21W2107/17—Use or application of lighting devices on or in particular types of vehicles for land vehicles for cycles for motorcycles
Abstract
The invention discloses a method for forming the free-form surfaces of optical lenses of an LED motorcycle headlamp. The method includes a multi-section type free-form surface forming method adopted in the optical lens of a high beam and a multi-section type free-form surface forming method adopted in the optical lens of a low beam, wherein the high beam and the low beam are arranged in the same headlamp. The optical lenses are similar to planoconvex lenses. The planes of the optical lenses are light incident planes and the multi-section type free-form surfaces of the optical lenses are light emergent planes. The optical lenses are located in front of a light reflector. Multiple-ring division is performed on an oval region with the center point of a lighting face as the center and a semicircular region, a free curve corresponding to the multi-section type free-form surface of each optical lens corresponding to a certain ring is calculated, the acquired free curves are then combined, and a free-form surface model is obtained through the acquired combined multi-section type free curves. Through the adoption of the method, the defects that the thickness of lenses is too large and optical efficiency is too low in the existing motorcycle lens lighting technology are overcome, and the method is simple, reliable, mature and feasible.
Description
Technical field
The present invention relates to LED motorcycle lamp lighting technical field, particularly a kind of formation method for LED motorcycle head lamp light lens free form surface.
Background technology
Along with development and the car load configuration needs of science and technology, in vehicle light illumination industry, GB5948-1998 " motorcycle incandescent mercerising source headlamp luminous intensity distribution performance " is required that the cry revised is strong.Deciding through discussion through expert group, mandatory national standards will be formulated, title is fixed tentatively as " launching the automotive headlight luminous intensity distribution performance of symmetrical dipped beam and/or distance light ", after standard approval is issued, implement the transitional period by arranging, and progressively substitute existing motorcycle headlamp standard GB5948-1998 " motorcycle incandescent mercerising source headlamp luminous intensity distribution performance ".
Light type in motorcycle headlamp new nation standard and illumination requirement are different from GB5948-1998, the issue that is about to of new nation's standard means that the motorcycle headlamp according to GB5948-1998 design will be eliminated, and its optical design used also no longer is applicable to new national standard.Especially for the motorcycle headlamp using LED light source, because the luminous model of LED chip is approximately cosine radiator, optical characteristics is different from the incandescent mercerising source of conventional motorcycle, will face more complicated optical design issues when making LED light source be applied to motorcycle headlamp.And there is the problem that thickness is too high or optical efficiency is not high in existing motorcycle lens headlamp.
Summary of the invention
The present invention is directed to above-mentioned Problems existing, provide the LED headlamp of motorcycle, this LED motorcycle headlamp comprises high beam and dipped headlights, can meet the light distribution requirements of new national standard to motor Vehicular LED headlamp, solves the optical design issues using LED light source.
The present invention adopts following technical scheme:
For the formation method of LED motorcycle head lamp light lens free form surface, comprise the formation method of the formation method of the multisection type free form surface of the high beam optical lens in same described headlamp and the multisection type free form surface of dipped headlights optical lens, described optical lens is class planoconvex spotlight, the plane of optical lens is light entrance face, its multisection type free form surface is light-emitting face, optical lens is in before reflective optical system
The formation method of the multisection type free form surface of described high beam optical lens is: be arranged, the plane of optical lens and LED chip light-emitting area with the central point of LED chip light-emitting area for origin of coordinates O in parallel
1set up rectangular coordinate system, LED chip light-emitting area place plane is X
1o
1y
1plane, crosses initial point O
1and and X
1o
1y
1the axle of plane orthogonal is Z
1axle, wherein X
1o
1y
1plane is horizontal plane, at origin of coordinates O
1distance 25 meters of, front and Z
1axle intersection point is o
1and be parallel to X
1o
1y
1the plane of plane is set to illuminated area, some o
1for illuminated area center, the field of illumination on illuminated area is set as with illuminated area central point o
1centered by elliptical region, then the division of many endless belt is carried out to this elliptical region, then each endless belt is carried out stress and strain model, law of conservation of energy is used to set up the corresponding solid angle energy relationship of endless belt energy, then light source solid angle is carried out many parts of divisions of equal amount by lighting requirement, first initial point is set when calculating arbitrary section of free curve afterwards, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, then by these multisection type free curves drawn around Z
1axle rotating 360 degrees composition FREEFORM SURFACE MODEL;
The formation method of the multisection type free form surface of described dipped headlights optical lens is: arrange vertical with LED chip light-emitting area for the plane of optical lens, and reflective optical system adopts the reflective optical system of part-ellipsoids shape, with the outside focus of reflective optical system for origin of coordinates O
2set up rectangular coordinate system, to cross some O
2and the parallel plane plane being parallel to optical lens is X
2o
2y
2plane, crosses initial point O
2and and X
2o
2y
2the axle of plane orthogonal is Z
2axle, wherein X
2o
2y
2plane is horizontal plane, at origin of coordinates O
2distance 25 meters of, front and Z
2axle intersection point is o
2and be parallel to X
2o
2y
2the plane of plane is set to illuminated area, some o
2for the central point of illuminated area, field of illumination is set to the central point o with illuminated area
2for the semicircular area in the center of circle, the division of many endless belt is carried out to this semicircular area, law of conservation of energy is used to set up the corresponding solid angle energy relationship of endless belt energy, then light source solid angle is carried out many parts of divisions of equal amount by lighting requirement, first initial point is set when calculating arbitrary section of free curve, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, then by these multisection type free curves drawn around Z
2axle rotating 360 degrees composition FREEFORM SURFACE MODEL.
Further, described the step that this elliptical region carries out the division of many endless belt specifically to be comprised: be divided into n part by the major semiaxis a of elliptic region, then semi-minor axis b be divided into n part, with a by the same ratio that major semiaxis divides
j, b
jrepresent the jth part of major axis a after dividing, then with illuminated area central point o
1centered by, respectively with a
1+ a
2+ ...+a
j-1, b
1+ b
2+ ...+b
j-1for major and minor axis does ellipse, then with a
1+ a
2+ ...+a
j, b
1+ b
2+ ...+b
jfor major and minor axis is done oval, two elliptical center regions are this ring belt area.
Further, described step of each ring belt area being carried out stress and strain model specifically comprises: first the major semiaxis a of a certain ring belt area and semi-minor axis b is divided into n part, respectively with a
1and b
ii-th part of major semiaxis a and i-th part of semi-minor axis after expression decile, with illuminated area central point o
1centered by, ring belt area is drawn and is divided into m part vesica piscis region, then by any point on endless belt and some o
1line and the angle α of x-axis be divided into m part, with α
jjth part of α after expression decile, with an o
1for end points, be α with the angle of x-axis
jbeam every a vesica piscis region is subdivided into m part again, like this by ring belt area divide from mxn sub-box.
Further, described the step that this semicircular area carries out the division of many endless belt specifically to be comprised: first the radius of circle r of semicircular area is divided into n part, with r
jjth part of radius after expression decile, then with illuminated area central point o
2for the center of circle, respectively with r
1+ r+...+r
j-1and r
1+ r+...+r
jfor radius draws circle, this semicircular area is divided into semicircular rings region.
Further, described utilization law of conservation of energy sets up the corresponding solid angle energy relationship of endless belt energy, then the many parts of steps divided that light source solid angle carries out equal amount by lighting requirement is specifically comprised: emergent ray L
1with Z
1the angle Φ of axle positive direction is divided into n part, has Φ
jrepresent jth part of Φ, Φ
jthe a divided with described endless belt
jand b
jone_to_one corresponding, Φ
j-1with Φ
jthe luminous flux of angle equals a
j-1, b
j-1with a
j, b
jrepresent the energy of endless belt, emergent ray L
1at X
1o
1y
1projection in plane and X
1the angle theta of axle is divided into m part, uses θ
jrepresent jth part of θ, θ
jwith the α of described stress and strain model
jone_to_one corresponding, by Φ
jand θ
jbring luminous flux formula into, then luminous flux in each angle is equaled the energy in each small grid region, calculate corresponding Φ
jand θ
jnumerical value.
Further, described utilization law of conservation of energy sets up the corresponding solid angle energy relationship of endless belt energy, then the many parts of steps divided that light source solid angle carries out equal amount by lighting requirement is specifically comprised: emergent ray L
2with Z
2the angle Φ ' of axle positive direction is divided into n part, with Φ '
jrepresent jth part of Φ ', Φ '
jthe r divided with described endless belt
jone_to_one corresponding, Φ
j-1with Φ
jthe luminous flux of angle equals r
j-1with r
jrepresent the energy of endless belt. by Φ '
jbring luminous flux formula into, then luminous flux in each angle is equaled the energy in described every a circular band region, calculate corresponding Φ '
jnumerical value.
Further, first initial point is set during described calculating arbitrary section of free curve, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, the step then forming FREEFORM SURFACE MODEL by these multisection type free curves drawn specifically comprises: first set each line segment initial point angle Φ as 0 ' respectively, Φ
1, Φ
2... Φ
nthen the distance between the plane of high beam optical lens and LED chip light-emitting area is set respectively, namely the position of light entrance face is determined, and then choose suitable lens thickness h according to this distance, determine that this value is the initial distance of the distance bottom surface of every section of curve, just can carry out respectively calculating each section of curve according to iteration, finally fill division part with simple line segment and can draw multisection type free curve.
Further, first initial point is set during described calculating arbitrary section of free curve, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, the step then forming FREEFORM SURFACE MODEL by these multisection type free curves drawn specifically comprises: first set each line segment initial point angle Φ as 0 ' respectively, Φ '
1, Φ '
2... Φ '
nthen the distance between the plane of dipped headlights optical lens and LED chip light-emitting area is set, namely the position of light entrance face is determined, and then choose suitable lens thickness h according to this distance, determine that this value is the initial distance of the distance bottom surface of every section of curve, just can carry out respectively calculating each section of curve according to iteration, finally fill division part with simple line segment and can draw multisection type free curve.
Compared to existing technology, technical scheme provided by the present invention is applicable to use the motorcycle headlamp new nation standard of LED light source, overcome to face more complicated optical design when current LED light source is applied to motorcycle headlamp problem, solve existing motorcycle lens headlamp and there is the defect that thickness is too high or optical efficiency is not high, easy reliable, mature and feasible.
Accompanying drawing explanation
Fig. 1 is the high beam optical lens schematic front view of the embodiment of the present invention.
Fig. 2 be in Fig. 1 A-A to cross-sectional schematic.
Fig. 3 is the dipped headlights optical lens schematic front view of the embodiment of the present invention.
Fig. 4 be in Fig. 3 B-B to cross-sectional schematic.
Fig. 5 is the schematic diagram of relation between the high beam of the embodiment of the present invention and illuminated area.
Fig. 6 is the schematic diagram of relation between the dipped headlights of the embodiment of the present invention and illuminated area.
Fig. 7 is the schematic diagram of the high beam emergent ray relation of the embodiment of the present invention.
Fig. 8 is the schematic diagram of the high beam emergent ray relation of the embodiment of the present invention.
In figure: 1-high beam optical lens; 11-plane; 12-multisection type free form surface; 13-LED chip; 14-illuminated area; 15-elliptical region; 2-dipped headlights optical lens; 21-plane; 22-multisection type free form surface; 23-reflective optical system; 24-LED chip; 25-illuminated area; 26-semicircular area.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further detailed explanation, it should be noted that, accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent; To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Formation method for LED motorcycle head lamp light lens free form surface provided by the invention, comprise the formation method of the formation method of the multisection type free form surface of the high beam optical lens 1 in same described headlamp and the multisection type free form surface of dipped headlights optical lens 2, described high beam optical lens 1, dipped headlights optical lens 2 is class planoconvex spotlight, the plane 11 of described high beam optical lens 1 and dipped headlights optical lens 2, 21 is light entrance face, both multisection type free form surfaces 12, 22 is light-emitting face, high beam optical lens 1 and dipped headlights optical lens 2 are in LED chip 13 respectively, before 14 (see Fig. 1 to Fig. 4), specifically:
The formation method of the multisection type free form surface 12 of described high beam optical lens 1 is: 1 plane 11 of high beam optical lens be arranged in parallel, with the central point of LED chip 13 light-emitting area for origin of coordinates O with LED chip 13 light-emitting area
1set up rectangular coordinate system, LED chip 13 light-emitting area place plane is X
1o
1y
1plane, crosses initial point O
1and and X
1o
1y
1the axle of plane orthogonal is Z
1axle, wherein X
1o
1y
1plane is horizontal plane, at origin of coordinates O
1distance 25 meters of, front and Z
1axle intersection point is o
1and be parallel to X
1o
1y
1the plane of plane is set to illuminated area 14, some o
1for illuminated area 14 center, the field of illumination on illuminated area 14 is set as with central point o
1centered by elliptical region 15, then the division of many endless belt is carried out to this elliptical region 15, then each endless belt is carried out stress and strain model, law of conservation of energy is used to set up the corresponding solid angle energy relationship of endless belt energy, then light source solid angle is carried out many parts of divisions of equal amount by lighting requirement, first initial point is set when calculating arbitrary section of free curve afterwards, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve 12, then by these multisection type free curves drawn around Z
1axle rotating 360 degrees composition FREEFORM SURFACE MODEL (see Fig. 5 and Fig. 7).
The formation method of the multisection type free form surface 22 of dipped headlights optical lens 2 is: used up by dipped headlights and learn that the plane 21 of lens 2 is vertical with LED chip 24 light-emitting area to be arranged, reflective optical system 23 adopts the reflective optical system of part-ellipsoids shape, with the outside focus of reflective optical system 23 for origin of coordinates O
2set up rectangular coordinate system, to cross some O
2and the parallel plane of the plane 21 being parallel to dipped headlights optical lens 2 is X
2o
2y
2plane, crosses initial point O
2and and X
2o
2y
2the axle of plane orthogonal is Z
2axle, wherein X
2o
2y
2plane is horizontal plane, at origin of coordinates O
2distance 25 meters of, front and Z
2axle intersection point is o
2and be parallel to X
2o
2y
2the plane of plane is set to illuminated area 25, some o
2for the central point of illuminated area 25, field of illumination is set to the central point o with illuminated area 25
2for the semicircular area 26 in the center of circle, the division of many endless belt is carried out to this semicircular area 26, law of conservation of energy is used to set up the corresponding solid angle energy relationship of endless belt energy, then light source solid angle is carried out many parts of divisions of equal amount by lighting requirement, first initial point is set when calculating arbitrary section of free curve, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, then by these multisection type free curves 22 drawn around Z
2axle rotating 360 degrees composition FREEFORM SURFACE MODEL (see Fig. 6 and Fig. 8).
In addition, for high beam with in the multisection type free form surface 12 formation method of optical lens 1:
Described the step that this elliptical region 15 carries out endless belt division specifically to be comprised: be divided into n part by the major semiaxis a of elliptic region, then semi-minor axis b be divided into n part, with a by the same ratio that major semiaxis divides
j, b
jrepresent the jth part of major axis a after dividing, then with illuminated area central point o
1centered by, respectively with a
1+ a
2+ ...+a
j-1, b
1+ b
2+ ...+b
j-1for major and minor axis does ellipse, then with a
1+ a
2+ ...+a
j, b
1+ b
2+ ...+b
jfor major and minor axis is done oval, two elliptical center regions are this ring belt area.
Described step of each ring belt area being carried out stress and strain model specifically comprises: first the major semiaxis a of a certain ring belt area and semi-minor axis b is divided into n part, respectively with a
1and b
ii-th part of major semiaxis a and i-th part of semi-minor axis after expression decile, with illuminated area central point o
1centered by, ring belt area is drawn and is divided into m part vesica piscis region, then by any point on endless belt and some o
1line and the angle α of x-axis be divided into m part, with α
jjth part of α after expression decile, with an o
1for end points, be α with the angle of x-axis
jbeam every a vesica piscis region is subdivided into m part again, like this by ring belt area divide from mxn sub-box.
Described utilization law of conservation of energy sets up the corresponding solid angle energy relationship of endless belt energy, then the many parts of steps divided that light source solid angle carries out equal amount by lighting requirement is specifically comprised: emergent ray L
1with Z
1the angle Φ (Φ can be set to 0 °≤Φ≤60 °) of axle positive direction is divided into n part, has Φ
jrepresent jth part of Φ, Φ
jthe a divided with described endless belt
jand b
jone_to_one corresponding, Φ
j-1with Φ
jthe luminous flux of angle equals a
j-1, b
j-1with a
j, b
jrepresent the energy of endless belt.Emergent ray L
1at X
1o
1y
1projection in plane and X
1the angle theta (θ can be set to 0 °≤θ≤360 °) of axle is divided into m part, uses θ
jrepresent jth part of θ, θ
jwith the α of described stress and strain model
jone_to_one corresponding, by Φ
jand θ
jbring luminous flux formula into, then luminous flux in each angle is equaled the energy in each small grid region, calculate corresponding Φ
jand θ
jnumerical value.
First initial point is set during described calculating arbitrary section of free curve, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, the step then forming FREEFORM SURFACE MODEL by these multisection type free curves drawn specifically comprises: first set each line segment initial point angle Φ as 0 ' respectively, Φ
1, Φ
2... Φ
nthen the distance between the plane of high beam optical lens 1 and LED chip 13 light-emitting area is set respectively, namely the position of light entrance face is determined, and then choose suitable lens thickness h=8mm according to this distance, determine that this value is the initial distance of the distance bottom surface of every section of curve, just can carry out respectively calculating each section of curve according to iteration, finally fill division part with simple line segment and can draw multisection type free curve 12.
For dipped headlights with in the multisection type free form surface 22 formation method of optical lens 2:
Described utilization law of conservation of energy sets up the corresponding solid angle energy relationship of endless belt energy, then the many parts of steps divided that light source solid angle carries out equal amount by lighting requirement is specifically comprised: be emergent ray L
2with Z
2the angle Φ ' (Φ ' can be set to 0 °≤Φ '≤60 °) of axle positive direction is divided into n part, with Φ '
jrepresent jth part of Φ ', Φ '
jthe r divided with described endless belt
jone_to_one corresponding, Φ
j-1with Φ
jthe luminous flux of angle equals r
j-1with r
jrepresent the energy of endless belt. by Φ '
jbring luminous flux formula into, then luminous flux in each angle is equaled the energy in described every a circular band region, calculate corresponding Φ '
jnumerical value.
First initial point is set during described calculating arbitrary section of free curve, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, the step then forming FREEFORM SURFACE MODEL by these multisection type free curves drawn specifically comprises: be first set each line segment initial point angle Φ as 0 ' respectively, Φ '
1, Φ '
2... Φ '
nthen the distance between the plane 21 of dipped headlights optical lens 2 and LED chip 24 light-emitting area is set, namely the position of light entrance face is determined, and then choose suitable lens thickness h=8mm according to this distance, determine that this value is the initial distance of the distance bottom surface of every section of curve, just can carry out respectively calculating each section of curve according to iteration, finally fill division part with simple line segment and can draw multisection type free curve 22.
The above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (8)
1. for the formation method of LED motorcycle head lamp light lens free form surface, comprise the formation method of the formation method of the multisection type free form surface of the high beam optical lens in same described headlamp and the multisection type free form surface of dipped headlights optical lens, described optical lens is class planoconvex spotlight, the plane of optical lens is light entrance face, its multisection type free form surface is light-emitting face, optical lens is in before reflective optical system, it is characterized in that:
The formation method of the multisection type free form surface of described high beam optical lens is: be arranged, the plane of optical lens and LED chip light-emitting area with the central point of LED chip light-emitting area for origin of coordinates O in parallel
1set up rectangular coordinate system, LED chip light-emitting area place plane is X
1o
1y
1plane, crosses initial point O
1and and X
1o
1y
1the axle of plane orthogonal is Z
1axle, wherein X
1o
1y
1plane is horizontal plane, at origin of coordinates O
1distance 25 meters of, front and Z
1axle intersection point is o
1and be parallel to X
1o
1y
1the plane of plane is set to illuminated area, some o
1for illuminated area center, the field of illumination on illuminated area is set as with illuminated area central point o
1centered by elliptical region, then the division of many endless belt is carried out to this elliptical region, then each endless belt is carried out stress and strain model, law of conservation of energy is used to set up the corresponding solid angle energy relationship of endless belt energy, then light source solid angle is carried out many parts of divisions of equal amount by lighting requirement, first initial point is set when calculating arbitrary section of free curve afterwards, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, then by these multisection type free curves drawn around Z
1axle rotating 360 degrees composition FREEFORM SURFACE MODEL;
The formation method of the multisection type free form surface of described dipped headlights optical lens is: arrange vertical with LED chip light-emitting area for the plane of optical lens, and reflective optical system adopts the reflective optical system of part-ellipsoids shape, with the outside focus of reflective optical system for origin of coordinates O
2set up rectangular coordinate system, to cross some O
2and the parallel plane plane being parallel to optical lens is X
2o
2y
2plane, crosses initial point O
2and and X
2o
2y
2the axle of plane orthogonal is Z
2axle, wherein X
2o
2y
2plane is horizontal plane, at origin of coordinates O
2distance 25 meters of, front and Z
2axle intersection point is o
2and be parallel to X
2o
2y
2the plane of plane is set to illuminated area, some o
2for the central point of illuminated area, field of illumination is set to the central point o with illuminated area
2for the semicircular area in the center of circle, the division of many endless belt is carried out to this semicircular area, law of conservation of energy is used to set up the corresponding solid angle energy relationship of endless belt energy, then light source solid angle is carried out many parts of divisions of equal amount by lighting requirement, first initial point is set when calculating arbitrary section of free curve, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, then by these multisection type free curves drawn around Z
2axle rotating 360 degrees composition FREEFORM SURFACE MODEL.
2. by the formation method for LED motorcycle head lamp light lens free form surface according to claim 1, it is characterized in that, described the step that this elliptical region carries out the division of many endless belt specifically to be comprised: be divided into n part by the major semiaxis a of elliptic region, then semi-minor axis b is divided into n part, with a by the same ratio that major semiaxis divides
j, b
jrepresent the jth part of major axis a after dividing, then with illuminated area central point o
1centered by, respectively with a
1+ a
2+ ...+a
j-1, b
1+ b
2+ ...+b
j-1for major and minor axis does ellipse, then with a
1+ a
2+ ...+a
j, b
1+ b
2+ ...+b
jfor major and minor axis is done oval, two elliptical center regions are this ring belt area.
3. by the formation method for LED motorcycle head lamp light lens free form surface according to claim 1, it is characterized in that, described step of each ring belt area being carried out stress and strain model specifically comprises: first the major semiaxis a of a certain ring belt area and semi-minor axis b is divided into n part, respectively with a
1and b
ii-th part of major semiaxis a and i-th part of semi-minor axis after expression decile, with illuminated area central point o
1centered by, ring belt area is drawn and is divided into m part vesica piscis region, then by any point on endless belt and some o
1line and the angle α of x-axis be divided into m part, with α
jjth part of α after expression decile, with an o
1for end points, be α with the angle of x-axis
jbeam every a vesica piscis region is subdivided into m part again, like this by ring belt area divide from mxn sub-box.
4. by the formation method for LED motorcycle head lamp light lens free form surface according to claim 1, it is characterized in that, described the step that this semicircular area carries out the division of many endless belt specifically to be comprised: first the radius of circle r of semicircular area is divided into n part, with r
jjth part of radius after expression decile, then with illuminated area central point o
2for the center of circle, respectively with r
1+ r+...+r
j-1and r
1+ r+...+r
jfor radius draws circle, this semicircular area is divided into semicircular rings region.
5. by the formation method for LED motorcycle head lamp light lens free form surface described in claim 1,2,3 or 4, it is characterized in that, described utilization law of conservation of energy sets up the corresponding solid angle energy relationship of endless belt energy, then the many parts of steps divided that light source solid angle carries out equal amount by lighting requirement is specifically comprised: emergent ray L
1with Z
1the angle Φ of axle positive direction is divided into n part, has Φ
jrepresent jth part of Φ, Φ
jthe a divided with described endless belt
jand b
jone_to_one corresponding, Φ
j-1with Φ
jthe luminous flux of angle equals a
j-1, b
j-1with a
j, b
jrepresent the energy of endless belt, emergent ray L
1at X
1o
1y
1projection in plane and X
1the angle theta of axle is divided into m part, uses θ
jrepresent jth part of θ, θ
jwith the α of described stress and strain model
jone_to_one corresponding, by Φ
jand θ
jbring luminous flux formula into, then luminous flux in each angle is equaled the energy in each small grid region, calculate corresponding Φ
jand θ
jnumerical value.
6. by the formation method for LED motorcycle head lamp light lens free form surface described in claim 1,2,3 or 4, it is characterized in that, described utilization law of conservation of energy sets up the corresponding solid angle energy relationship of endless belt energy, then the many parts of steps divided that light source solid angle carries out equal amount by lighting requirement is specifically comprised: emergent ray L
2with Z
2the angle Φ ' of axle positive direction is divided into n part, with Φ '
jrepresent jth part of Φ ', Φ '
jthe r divided with described endless belt
jone_to_one corresponding, Φ
j-1with Φ
jthe luminous flux of angle equals r
j-1with r
jrepresent the energy of endless belt. by Φ '
jbring luminous flux formula into, then luminous flux in each angle is equaled the energy in described every a circular band region, calculate corresponding Φ '
jnumerical value.
7. by the formation method for LED motorcycle head lamp light lens free form surface described in claim 1,2,3 or 4, it is characterized in that, first initial point is set during described calculating arbitrary section of free curve, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, the step then forming FREEFORM SURFACE MODEL by these multisection type free curves drawn specifically comprises: first set each line segment initial point angle Φ as 0 ' respectively, Φ
1, Φ
2... Φ
nthen the distance between the plane of high beam optical lens and LED chip light-emitting area is set respectively, namely the position of light entrance face is determined, and then choose suitable lens thickness h according to this distance, determine that this value is the initial distance of the distance bottom surface of every section of curve, just can carry out respectively calculating each section of curve according to iteration, finally fill division part with simple line segment and can draw multisection type free curve.
8. by the formation method for LED motorcycle head lamp light lens free form surface described in claim 1,2,3 or 4, it is characterized in that: during described calculating arbitrary section of free curve, first set initial point, then the law of refraction is used to draw this section of curve by iterations and numerical simulation, then connect each section of curve by simple line segment and form a multisection type free curve, the step then forming FREEFORM SURFACE MODEL by these multisection type free curves drawn specifically comprises: first set each line segment initial point angle Φ as 0 ' respectively, Φ '
1, Φ '
2... Φ '
nthen the distance between the plane of dipped headlights optical lens and LED chip light-emitting area is set, namely the position of light entrance face is determined, and then choose suitable lens thickness h according to this distance, determine that this value is the initial distance of the distance bottom surface of every section of curve, just can carry out respectively calculating each section of curve according to iteration, finally fill division part with simple line segment and can draw multisection type free curve.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764809A (en) * | 2017-01-12 | 2017-05-31 | 广东雷腾智能光电有限公司 | A kind of manufacture method of vehicle lamp light source, lens and lens |
| CN113330247A (en) * | 2019-01-24 | 2021-08-31 | 首尔半导体株式会社 | Vehicle headlamp lens |
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|---|---|---|---|---|
| EP1243844A2 (en) * | 2001-03-23 | 2002-09-25 | Stanley Electric Co., Ltd. | Projector type lamp |
| CN102650398A (en) * | 2011-02-24 | 2012-08-29 | 株式会社小糸制作所 | Vehicle lamp |
| CN103383094A (en) * | 2013-08-13 | 2013-11-06 | 广东骑光车灯工业有限公司 | Free-form surface forming method for optical lens for light-emitting diode (LED) motorcycle head lamp |
| CN103629614A (en) * | 2013-11-06 | 2014-03-12 | 华南理工大学 | LED car high beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1243844A2 (en) * | 2001-03-23 | 2002-09-25 | Stanley Electric Co., Ltd. | Projector type lamp |
| CN102650398A (en) * | 2011-02-24 | 2012-08-29 | 株式会社小糸制作所 | Vehicle lamp |
| CN103383094A (en) * | 2013-08-13 | 2013-11-06 | 广东骑光车灯工业有限公司 | Free-form surface forming method for optical lens for light-emitting diode (LED) motorcycle head lamp |
| CN103629614A (en) * | 2013-11-06 | 2014-03-12 | 华南理工大学 | LED car high beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106764809A (en) * | 2017-01-12 | 2017-05-31 | 广东雷腾智能光电有限公司 | A kind of manufacture method of vehicle lamp light source, lens and lens |
| CN113330247A (en) * | 2019-01-24 | 2021-08-31 | 首尔半导体株式会社 | Vehicle headlamp lens |
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|---|---|
| CN105042511B (en) | 2018-04-13 |
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