CN106523958A - Secondary lens for forming annular light spots - Google Patents
Secondary lens for forming annular light spots Download PDFInfo
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- CN106523958A CN106523958A CN201611256040.8A CN201611256040A CN106523958A CN 106523958 A CN106523958 A CN 106523958A CN 201611256040 A CN201611256040 A CN 201611256040A CN 106523958 A CN106523958 A CN 106523958A
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- Prior art keywords
- secondary lens
- refraction
- incidence
- plane
- led
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Lenses (AREA)
Abstract
The invention discloses a secondary lens for forming annular light spots. The secondary lens comprises a secondary lens body; an LED light emitting area is inwards recessed in the middle of the back part of the secondary lens body; the side wall of the LED light emitting area forms a total-reflection incident surface, and the frontal bottom forms a refraction incident surface; a refraction emitting area is inwards recessed in the middle of the frontal surface of the secondary lens body; a refraction emitting surface is forwards projected in the refraction emitting area; the side surface of the secondary lens body forms a total-reflection surface, and the area from the edge of the frontal surface to the edge of the refraction emitting area forms a total-reflection emitting surface; the incident angle of an LED irradiating to the refraction incident surface is 0-34 degrees; and the incident angle of the LED irradiating to the total-reflection incident surface is 34-80 degrees. The secondary lens is designed through an unique method; the annular light spots are formed through refraction and total reflection; the lens has the advantages of simple structure and reasonable design; and the formed annular light spots are excellent in illuminating effect, uniform in light rays and obvious in margin effect.
Description
Technical field
The present invention relates to LED lamp illumination technical field, and in particular to a kind of for formation ring-shaped light spot in LED lamp
Secondary lens.
Background technology
LED lens be closely connected with LED together with part, which can strengthen the efficiency of light and luminous efficiency of LED,
The optical system of the optical field distribution of LED can be changed according to different effects using different lens.LED lens are divided into one
Secondary lens and secondary lens, lens directly encapsulate (or bonding) on LED core plate rack, becomes an entirety with LED.
It is 180 degree that LED chip lights, and No. one time lens are typically made with materials such as PMMA, PC, optical glass or silica gel.Secondary lens
It is two independent parts with LED, function is to pool again arbitrarily to want the lighting angle of LED/light source between 5 ° to 160 °
Angle, the distribution of light field can be divided mainly into：Circular, oval and rectangle.Secondary lens material typically use optical grade PMMA or
Person PC.The purpose of secondary lens is that light field is shaped to arbitrary shape, reaches the requirement of irradiation.Such as Patent No.
The patent of invention of ZL201310728006.6 discloses a kind of lens and light fixture for forming ring-shaped light spot, however, due to which
The structure design of secondary lens is not reasonable, causes the imaging effect of ring-shaped light spot not ideal enough, and such as edge effect is not obvious, light
Line is uneven etc..
The content of the invention
The technical problem to be solved in the present invention is the defect for prior art, there is provided a kind of structure design more reasonable, ring
Shape hot spot effect is more preferably used for the secondary lens for forming ring-shaped light spot.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：It is a kind of for forming the secondary of ring-shaped light spot
Lens, including secondary lens body, it is characterised in that：The side of the secondary lens body is integrally conical structure, and side surface is
The arcuate structure of evagination, is provided with LED luminous zones recessed inwardly, the side wall of LED luminous zones in the middle of the back of secondary lens body
The total reflection plane of incidence is formed, the refraction plane of incidence is formed on front bottom；It is provided with recessed inwardly in the middle of the front of secondary lens body
Refraction outgoing area, reflect in outgoing area with the refraction exit facet for protruding forward；The side of secondary lens body forms total reflection
Face, front edge form total reflection exit facet to the region for reflecting outgoing area edge；LED illumination is to the incidence angle for reflecting the plane of incidence
Spend for 0-34 degree, LED illumination is 34-80 degree to the incident angle for being totally reflected the plane of incidence.
Further, the cross-sectional view of the secondary lens body, LED luminous zones and refraction outgoing area is rounded, and the center of circle
Overlap；The diameter with diameter greater than LED luminous zones in refraction outgoing area.
Further, whole secondary lens are the symmetrical structures with the cross section center of circle as symmetry axis.
Further, mounting ring is provided with the front portion of lens, mounting ring is protruded from outside the side of secondary lens body.
Further, arc-shaped curved surface of the exit facet for evagination is reflected, and the center of exit facet is reflected towards sunken inside, recessed depth
Edge depth of the degree less than refraction exit facet, the most convex place for reflecting exit facet are recessed within total reflection exit facet.
Further, the arc-shaped curved surface that the plane of incidence is evagination backwards is reflected, and the center of the plane of incidence is reflected towards sunken inside, it is recessed
Depth more than refraction the plane of incidence edge depth.
The method for designing of the secondary lens is as follows,
First, the secondary lens method for designing of ring-shaped light spot can be formed：
(1) fully reflecting surface design.The effect of fully reflecting surface is light of the light for sending LED after being totally reflected the plane of incidence
Line is shone in the annular region of target after fully reflecting surface occurs total reflection.Required according to the conservation of energy, the light in the region
Energy, equal with the energy in receiving plane annular region, mathematic(al) representation is：
ΦIt is luminous=∫ I (θ) d Ω
ΦRing2 π ydy of=∫ E (y)
ΦIt is luminous=ΦRing
In formula：I (θ) is LED luminous intensities, is changed with shooting angle θ, and Changing Pattern is I (θ)=I0Cos θ, I0It is center
Luminous intensity；E (y) is the illumination of receiving plane, with ring center apart from y change.Because uniform irradiation to be realized, it is believed that E
Y () is definite value.
Then the target illumination position y of light-emitting zone difference θ is calculated by calculus, the mathematics for obtaining θ～y is closed
System.
Finally, according to the law of refraction and reflection law in optics, calculate the fully reflecting surface for meeting above-mentioned mathematical relationship
Curvature distribution parameter.
(2) refractive curvature design.Refractive curvature is constituted by the plane of incidence and refraction exit facet is reflected, and the light in the region is only
Generation is reflected, and is required according to the conservation of energy, and the light ray energy in the region is equal with the energy in receiving plane annular region, number
Learning expression formula is：
ΦIt is luminous=∫ I (θ) d Ω
ΦRing2 π ydy of=∫ E (y)
ΦIt is luminous=ΦRing
In formula：I (θ) is LED luminous intensities, is changed with shooting angle θ, and Changing Pattern is I (θ)=I0Cos θ, I0It is center
Luminous intensity；E (y) is the illumination of receiving plane, with ring center apart from y change.Because uniform irradiation to be realized, it is believed that E
Y () is definite value.
Then the target illumination position y of light-emitting zone difference θ is calculated by calculus methods, the mathematics of θ～y is obtained
Relation.
Finally, according to the law of refraction in optics, calculate the refractive curvature curvature distribution ginseng for meeting above-mentioned mathematical relationship
Number.
Secondly, secondary lens structure design：
Secondary lens are made up of luminous zone, total reflection area and refracting sphere.LED chip is installed in luminous zone, makes the light that LED sends
Total reflection area being reached on demand and refracting sphere being constituted, incident angle is that 0 34 ° of light passes through refracting sphere, and incident angle is 34-
80 ° of light is by being totally reflected area.
More specifically, the light that incident angle is 34-80 ° enters total reflection area by the plane of incidence is totally reflected, face is totally reflected
Total reflection, projects secondary lens by fully reflecting surface, ring-shaped light spot is formed on shadow surface；
Incident angle enters refracting sphere by the plane of incidence is reflected for 0-34 ° of light, is changed by refracting sphere light angle
Become, secondary lens are projected by refraction exit facet, ring-shaped light spot is equally formed on shadow surface.
Thus, the LED installed in LED luminous zones sends the light of 180 degree, light point two-way passes through secondary lens, wherein
(incident angle is 34-80 °) reflects up to lighting area by fully reflecting surface all the way, and (incident angle is 0- to another road intermediate rays
34 °) reach shadow surface and form ring-shaped light spot by reflecting the plane of incidence and refraction exit facet.
The present invention is the secondary lens designed by unique method, and ring-shaped light spot is by refraction and is totally reflected common
Formed, lens itself have the advantages that simple structure, reasonable in design, and the ring-shaped light spot of formation then lighting effect is good, light is equal
Even, border effect is obvious.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural representation that ring-shaped light spot is formed by the present invention；
Fig. 3 is backsight structural representation of the present invention.
1 is secondary lens body, and 2 is chip light-emitting area, and 3 are the refraction plane of incidence, and 4 is fully reflecting surface, 5 is total reflection outgoing
Face, 6 are the total reflection plane of incidence, and 7 is mounting ring, and 8 are refraction exit facet, and 9 is LED, and 10,11 is middle part refracted light, and 12,13 are
Total reflection light, 14 is shadow surface, and 15 is ring-shaped light spot.
Specific embodiment
In the present embodiment, reference Fig. 1, Fig. 2 and Fig. 3, the secondary lens for forming ring-shaped light spot, including it is secondary
Mirror body 1, the side of secondary lens body 1 are integrally conical structure, arcuate structure of the side surface for evagination, in secondary lens body 1
Back in the middle of be provided with LED luminous zones 2 recessed inwardly, the side wall of LED luminous zones 2 forms the total reflection plane of incidence 6, front bottom
Portion forms the refraction plane of incidence 3；Refraction outgoing area recessed inwardly, refraction outgoing area are provided with the middle of the front of secondary lens body 1
It is interior with the refraction exit facet 8 for protruding forward；The side of secondary lens body 1 forms fully reflecting surface 4, and front edge is to reflecting outgoing
The region of area edge forms total reflection exit facet 5；LED 9 expose to refraction the plane of incidence 3 incident angle (i.e. angle b) is 0-34
Degree, refracted light is uniformly distributed from 0-34 degree, and LED 9 exposes to the incident angle of the total reflection plane of incidence 6, and (i.e. angle a) is 34-80
Degree, total reflection light are uniformly distributed from 34-80 degree.
The cross-sectional view of the secondary lens body 1, LED luminous zones 2 and refraction outgoing area is rounded, and the center of circle overlaps；Folding
The diameter with diameter greater than LED luminous zones 2 in area is penetrated, LED luminous zones can be entirely covered.
Whole secondary lens are the symmetrical structures with the cross section center of circle as symmetry axis.
Mounting ring 7 is provided with the front portion of lens, mounting ring 7 is protruded from outside the side of secondary lens body 1.
Arc-shaped curved surface of the refraction exit facet 8 for evagination, reflects the center of exit facet 8 towards sunken inside, and recessed depth is less than
The edge depth of refraction exit facet 8, the most convex place for reflecting exit facet 8 are recessed within total reflection exit facet 5.
Arc-shaped curved surface of the refraction plane of incidence 3 for evagination backwards, reflects the center of the plane of incidence 3 towards sunken inside, recessed depth
More than the edge depth of the refraction plane of incidence 3.
The method for designing of the secondary lens is as follows,
First, the secondary lens method for designing of ring-shaped light spot can be formed：
(1) fully reflecting surface design.The effect of fully reflecting surface 4 is the light for sending LED 9 by being totally reflected after the plane of incidence 6
Light fully reflecting surface 4 occur total reflection after shine in the annular region of target.Required according to the conservation of energy, in the region
Light ray energy, equal with the energy in receiving plane annular region, mathematic(al) representation is：
ΦIt is luminous=∫ I (θ) d Ω
ΦRing2 π ydy of=∫ E (y)
ΦIt is luminous=ΦRing
In formula：I (θ) is LED luminous intensities, is changed with shooting angle θ, and Changing Pattern is I (θ)=I0Cos θ, I0It is center
Luminous intensity；E (y) is the illumination of receiving plane, with ring center apart from y change.Because uniform irradiation to be realized, it is believed that E
Y () is definite value.
Then the target illumination position y of light-emitting zone difference θ is calculated by calculus, the mathematics for obtaining θ～y is closed
System.
Finally, according to the law of refraction and reflection law in optics, calculate the fully reflecting surface for meeting above-mentioned mathematical relationship
Curvature distribution parameter.
(2) refractive curvature design.Refractive curvature is constituted by the plane of incidence 3 and refraction exit facet 8 is reflected, the light in the region
Only there is refraction, required according to the conservation of energy, the light ray energy in the region is equal with the energy in receiving plane annular region,
Mathematic(al) representation is：
ΦIt is luminous=∫ I (θ) d Ω
ΦRing2 π ydy of=∫ E (y)
ΦIt is luminous=ΦRing
In formula：I (θ) is LED luminous intensities, is changed with shooting angle θ, and Changing Pattern is I (θ)=I0Cos θ, I0In being
Heart luminous intensity；E (y) is the illumination of receiving plane, with ring center apart from y change.Because uniform irradiation to be realized, it is believed that
E (y) is definite value.
Then the target illumination position y of light-emitting zone difference θ is calculated by calculus methods, the mathematics of θ～y is obtained
Relation.
Finally, according to the law of refraction in optics, calculate the refractive curvature curvature distribution ginseng for meeting above-mentioned mathematical relationship
Number.
Secondly, secondary lens structure design：
Secondary lens are made up of luminous zone, total reflection area and refracting sphere.LED chip is installed in luminous zone, makes the light that LED sends
Total reflection area being reached on demand and refracting sphere being constituted, incident angle is that 0 34 ° of light passes through refracting sphere, and incident angle is 34-
80 ° of light is by being totally reflected area.
More specifically, the light that incident angle is 34-80 ° enters total reflection area by the plane of incidence 6 is totally reflected, face is totally reflected
4 total reflections, project secondary lens by fully reflecting surface 4, and ring-shaped light spot 15 is formed on shadow surface 14；
Incident angle enters refracting sphere by the plane of incidence 3 is reflected for 0-34 ° of light, is changed by refracting sphere light angle
Become, secondary lens are projected by refraction exit facet 8, ring-shaped light spot 15 is formed on shadow surface 14.
Thus, the LED 9 installed in LED luminous zones 2 sends the light of 180 degree, light point two-way passes through secondary lens, its
In all the way (incident angle be 34-80 °) lighting area is reflected up to by fully reflecting surface 4, (incident angle is for another road intermediate rays
0-34 °) reach shadow surface and form ring-shaped light spot by reflecting the plane of incidence 3 and refraction exit facet 8.
Below the present invention is described in detail, the above, only the preferred embodiments of the invention, when can not
Limit the scope of the present invention, i.e., it is all according to the made impartial change of the application scope with modify, all should still belong to covering scope of the present invention
It is interior.
Claims (6)
1. a kind of secondary lens for forming ring-shaped light spot, including secondary lens body, it is characterised in that：The secondary lens body
Side be integrally conical structure, side surface is the arcuate structure of evagination, is provided with inwardly in the middle of the back of secondary lens body
Recessed LED luminous zones, the side wall of LED luminous zones form the total reflection plane of incidence, and the refraction plane of incidence is formed on front bottom；Two
Refraction outgoing area recessed inwardly is provided with the middle of the front of secondary lenticular body, is reflected and be there is in outgoing area the refraction outgoing protruded forward
Face；The side of secondary lens body forms fully reflecting surface, and front edge forms total reflection outgoing to the region for reflecting outgoing area edge
Face；LED illumination to the incident angle for reflecting the plane of incidence is 0-34 degree, and LED illumination is 34- to the incident angle for being totally reflected the plane of incidence
80 degree.
2. secondary lens for forming ring-shaped light spot according to claim 1, it is characterised in that：The secondary lens
The cross-sectional view of body, LED luminous zones and refraction outgoing area is rounded, and the center of circle overlaps；Refraction outgoing area is sent out with diameter greater than LED
The diameter in light area.
3. secondary lens for forming ring-shaped light spot according to claim 2, it is characterised in that：Entirely secondary lens are
Symmetrical structure with the cross section center of circle as symmetry axis.
4. secondary lens for forming ring-shaped light spot according to claim 1, it is characterised in that：Set in the front portion of lens
There is mounting ring, mounting ring is protruded from outside the side of secondary lens body.
5. secondary lens for forming ring-shaped light spot according to claim 3, it is characterised in that：Refraction exit facet is outer
Convex arc-shaped curved surface, reflects the center of exit facet towards sunken inside, and recessed depth is reflected less than the edge depth of refraction exit facet
The most convex place of exit facet is recessed within total reflection exit facet.
6. secondary lens for forming ring-shaped light spot according to claim 3, it is characterised in that：The refraction plane of incidence is court
The arc-shaped curved surface of evagination, reflects the center of the plane of incidence towards sunken inside afterwards, and recessed depth is more than the edge depth for reflecting the plane of incidence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611256040.8A CN106523958A (en) | 2016-12-30 | 2016-12-30 | Secondary lens for forming annular light spots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611256040.8A CN106523958A (en) | 2016-12-30 | 2016-12-30 | Secondary lens for forming annular light spots |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106523958A true CN106523958A (en) | 2017-03-22 |
Family
ID=58336013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611256040.8A Withdrawn CN106523958A (en) | 2016-12-30 | 2016-12-30 | Secondary lens for forming annular light spots |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106523958A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102496A (en) * | 2017-05-08 | 2017-08-29 | 浙江大华技术股份有限公司 | A kind of light compensating apparatus, camera lens and camera device |
| CN109282245A (en) * | 2018-10-26 | 2019-01-29 | 成都恒坤光电科技有限公司 | A kind of compound lens and the lamps and lanterns using the compound lens |
| CN109931573A (en) * | 2019-04-18 | 2019-06-25 | 广东省半导体产业技术研究院 | A kind of LED lens and lighting device |
| CN110123248A (en) * | 2019-06-28 | 2019-08-16 | 邹晓辉 | Fujinon electronic video endoscope is used in a kind of imaging of medical image |
| CN111989520A (en) * | 2018-03-09 | 2020-11-24 | 小丝电工株式会社 | Lens for lighting |
-
2016
- 2016-12-30 CN CN201611256040.8A patent/CN106523958A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102496A (en) * | 2017-05-08 | 2017-08-29 | 浙江大华技术股份有限公司 | A kind of light compensating apparatus, camera lens and camera device |
| CN107102496B (en) * | 2017-05-08 | 2019-05-24 | 浙江大华技术股份有限公司 | A kind of light compensating apparatus, camera lens and photographic device |
| CN111989520A (en) * | 2018-03-09 | 2020-11-24 | 小丝电工株式会社 | Lens for lighting |
| CN111989520B (en) * | 2018-03-09 | 2022-11-29 | 小丝电工株式会社 | Lenses for lighting |
| CN109282245A (en) * | 2018-10-26 | 2019-01-29 | 成都恒坤光电科技有限公司 | A kind of compound lens and the lamps and lanterns using the compound lens |
| CN109282245B (en) * | 2018-10-26 | 2024-04-30 | 成都恒坤光电科技有限公司 | Combined lens and lamp adopting same |
| CN109931573A (en) * | 2019-04-18 | 2019-06-25 | 广东省半导体产业技术研究院 | A kind of LED lens and lighting device |
| CN110123248A (en) * | 2019-06-28 | 2019-08-16 | 邹晓辉 | Fujinon electronic video endoscope is used in a kind of imaging of medical image |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170322 |
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