CN207486479U - A kind of LED collimation system - Google Patents
A kind of LED collimation system Download PDFInfo
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- CN207486479U CN207486479U CN201721745003.3U CN201721745003U CN207486479U CN 207486479 U CN207486479 U CN 207486479U CN 201721745003 U CN201721745003 U CN 201721745003U CN 207486479 U CN207486479 U CN 207486479U
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Abstract
The utility model discloses a kind of LED collimation systems, the collimation lens gone out in LED on optical channel is sequentially distributed including LED chip and 2 or more, the combined focal length range of the collimation lens is 3 8mm, the combined focal length and the ratio range of the colimated light system light extraction bore are 0.4 0.8, and the rear cut-off distance range of the colimated light system is 0 3mm.Compared with the prior art, the utility model has efficient, simple in structure, the easy to use advantageous effect of collimating optics.
Description
Technical field
The utility model is related to technical field of LED illumination, more particularly, to a kind of LED collimation system.
Background technology
Since LED relative to conventional illumination sources has many advantages, such as that energy-saving and environmental protection, service life are long, reaction speed is fast,
Great power LED lighting engineering causes the common concern of domestic outer light source circle, it has also become has development prospect and influence power
One new high-tech product.But since the light emitting angle of LED is larger, to concentrate the luminous beam of LED, improves the long-range of LED and penetrate
It can, it is therefore desirable to which the light sent out to LED collimates.However, LED collimation lenses of the prior art, exist mostly
The defects of complicated, cost of implementation is high, collimating effect is undesirable and deficiency, it is limited and promotes the use of.For array
Each LED light sources increase the size, complexity and cost of light light-emitting device using separation and different collimators, do not meet
It is required that.In addition, due to Fresnel loss and beam spread at larger refraction angle, the wide-angle refraction of collecting lens reduces always
Collection efficiency.Therefore the lens of light are needed to collimate or focused in LED light-emitting devices, reduce the control in transmitter assembling process
System and adjustment, and then improve LED light-emitting device optical efficiencies.
Utility model content
To overcome existing technological deficiency, the utility model provide a kind of raising LED light efficiency, it is simple in structure, make
With convenient LED collimation system.
To realize the purpose of this utility model, it is achieved using following technical scheme：
It is saturating to be sequentially distributed the collimation gone out on optical channel in LED including LED chip and 2 or more for a kind of LED collimation system
Mirror, the combined focal length range of the collimation lens is 3-8mm, the combined focal length and the ratio of the colimated light system light extraction bore
Ranging from 0.4-0.8, the rear cut-off distance range of the colimated light system is 0-3mm.
The light that collimation lens is used to send out LED chip collimates, and concentrates the light dissipated around originally,
Improve the luminous flux of unit area inner light beam.Combined focal length calculation formula about two panels collimation lens is：
Wherein, combined focal lengths of the f' for two panels collimation lens, f'1And f'2The respectively focal length of two panels eyeglass, d12It is first
The distance between the image space principal plane of piece collimation lens and second collimation lens object space principal plane.Collimation lens combined focal length
Range defines the size of collimation lens and the size of LED chip, so as to filter out the production for being more advantageous to improving optical efficiency
Product.
On the basis of combined focal length range is limited, combined focal length is limited with the ratio range of light extraction bore as 0.4-0.8,
That is the range of F numbers is between 0.4-0.8, the ratio defined for combined focal length f' with light extraction bore D of F numbers, i.e. F=f'/D, f'
The combined focal length of expression system, D are the light extraction bore of colimated light system.F numbers concerning to colimated light system collect LED light line efficiency,
The angle that system collects LED light line can be collimated by corresponding to.Assuming that θ is the angle that collimated system collects LED light line, then
Relationship between F numbers and θ is：
Due to colimated light system collect LED light line angle, θ be 90 ° when best results, at this time F numbers be 0.5, therefore limit F
Several ranges, so as to further define the efficiency that colimated light system collects LED light line, substantially increase standard between 0.4-0.8
The optics utilization rate of direct line system.
The rear cut-off distance of the colimated light system refers to distance of the collimation lens close to the one side focal point of LED chip.Due to LED
The area of chip is in 1mm2—10mm2In the range of obtained collimation efficiency it is best, under the premise of collimation efficiency is ensured, work as coke
Away from it is long when, must increase the light extraction bore of colimated light system, when so extending more LED arrays again, corresponding total light-emitting area will
It can increase, i.e., entire light-emitting device volume is excessive, and manufactures high expensive.When focal length is shorter, same chip size is burnt
Away from shorter, the collimating effect of colimated light system is undesirable, i.e., collimated divergence of beam angle is still bigger.Therefore it is same in collimation lens
Under the premise of the collection light efficiency of sample, suitable control rear cut-off distance can reduce cost.
In the utility model, between the light emitting anger of LED is 150 °~180 °, after collimated lens system collimation, LED divergings
Angle is narrowed between 15 °~32 °.
Further, the collimation lens gone out in LED on optical channel is sequentially distributed including 2 or 3, the collimation lens is pressed
With the distance of LED chip from closely to being far divided into the first collimation lens, the second collimation lens and third collimation lens.
The light efficiency that 1 collimation lens is collected is too low, and too many collimation lens can also increase the volume of entire colimated light system
With increase cost, therefore preferably selection be 2 to 3 collimation lenses.
Further, the collimation lens is planoconvex spotlight.
Further, the LED chip is located near the combined focal or focus of collimation lens in the range of 1mm.
When LED chip is in the position of colimated light system combined focal, after the collimated lens of light that LED chip is sent out
Form directional light or the beam emissions close to directional light；When LED chip is provided close to collimation lens direction far from focus, meeting
Cause the irradiant effect of collimation lens undesirable, that is, the beam divergence angle after collimating is bigger than normal；Otherwise to be relatively distant from collimation
When lens direction is far from focus, the light emitting anger that colimated light system collects LED light line can be caused less than normal, so as to influence collimating lens system
Efficiency.Therefore the position of LED chip is preferably provided near the combined focal or focus of collimation lens in the range of 1mm.
Further, first collimation lens one side adjacent with LED chip is concave structure.
The first collimation lens one side adjacent with LED chip is concave structure, and the position that ladle cover is formed to LED chip is closed
System, so as to which the light for being sent out LED chip is preferably received by the first collimation lens, the optics for improving colimated light system utilizes
Rate.
Further, the size of first collimation lens, the second collimation lens and third collimation lens is sequentially increased.
Further, the high refractive index of first collimation lens is accurate in the refractive index of the second collimation lens, described second
The material that straight lens and third collimation lens are selected is Pyrex materials, high-boron-silicon glass or B270 materials.
Further, including several groups of LED chips, the LED chip is in array distribution, and the collimation lens and LED
Chip corresponds matrix arrangement.
Further, every group of LED chip and in the position between the front row of array distribution or heel row two adjacent groups LED chip
Relationship be in equilateral triangle relationship, the collimation lens in array distribution front row or heel row two adjacent groups collimation lens it
Between position relationship be in equilateral triangle relationship.
Because for the LED chip of array arrangement, the LED chip optical efficiency positioned at corner is relatively low, by every group of LED chip
Be designed to and between the front row of array distribution or heel row two adjacent groups LED chip position relationship be in equilateral triangle pass
System so that the LED chip between row and column under the premise of ensureing to radiate, rejects array corner glazing into the mode mutually staggered
Less efficient LED chip is learned, this is laid out the overall dimension for reducing LED entirety arrangement modes, that is, reduces total light-emitting surface
Product, advantageously reduces etendue so that the optical efficiency higher of colimated light system.
Further, it is 6-10mm per the spacing between adjacent collimation lens optical axis center two-by-two, the second collimation lens
It is seamless spliced between the edge of third collimation lens and neighboring collimator lens.
Compared with the prior art, it is efficient, simple in structure, easy to use to provide a kind of collimating optics for the utility model
LED collimation system.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is by the utility model LED chip from the angle that chip emits beam with forming angle after collimation lens
Schematic diagram.
Fig. 3 is the utility model LED chip and collimation lens is in the structure diagram of array distribution.
Fig. 4 be the utility model LED chip array in row and column into the arrangement that is staggered structure diagram.
Fig. 5 forms the structure diagram of equilateral triangle between the utility model LED chip and between collimation lens.
Fig. 6 is the structure diagram of another embodiment of the utility model.
Specific embodiment
To make the purpose of this utility model, technical solution and advantage clearer, below in conjunction with the accompanying drawings to the utility model
Embodiment is described in more detail.
Embodiment 1
As shown in Figure 1, a kind of LED collimation system, is sequentially distributed to go out on optical channel in LED including LED chip 3 and 2
Collimation lens, respectively the first collimation lens 1 and the second collimation lens 2.First collimation lens, 1 and second collimation lens 2
It is planoconvex spotlight.The size of first collimation lens 1 and the second collimation lens 2 is sequentially increased.The combination of the collimation lens is burnt
It is 3-8mm away from f ' ranges, the ratio range F of the combined focal length f ' and combined focal length light extraction bore D is 0.4-0.8, the standard
The rear cut-off distance range of direct line system is 0-3mm.
The light that first collimation lens 1 and the second collimation lens 2 are used to send out LED chip 3 collimates, and makes originally
The light dissipated around is concentrated, and improves the luminous flux of unit area inner light beam.Combined focal length f ' about two panels collimation lens
Calculation formula is：
Wherein, combined focal lengths of the f' for two panels collimation lens, f'1And f'2The respectively focal length of two panels eyeglass, d12It is first
The distance between the image space principal plane of piece collimation lens 1 and second saturating 2 mirror object space principal plane of collimation.Collimation lens combined focal length
The range of f ' defines the size of collimation lens and the size of LED chip, is more advantageous to improving optical efficiency so as to filter out
Product.
On the basis of combined focal length f ' ranges are limited, combined focal length is limited with the ratio range F of light extraction bore as 0.4-
0.8, i.e. the range of F numbers is between 0.4-0.8, the ratio defined for combined focal length f' with light extraction bore D of F numbers, i.e. and F=f'/
D, f' represent the combined focal length of system, and D is the light extraction bore of colimated light system.F numbers are concerning the effect that LED light line is collected to colimated light system
Rate, that is, the angle that system collects LED light line can be collimated by corresponding to.Assuming that θ is the angle that collimated system collects LED light line
Degree, then the relationship between F numbers and θ is：
Due to colimated light system collect LED light line angle, θ be 90 ° when best results, at this time F numbers be 0.5, therefore limit F
Several ranges, so as to further define the efficiency that colimated light system collects LED light line, substantially increase standard between 0.4-0.8
The optics utilization rate of direct line system.
The rear cut-off distance of the colimated light system refers to distance of the collimation lens close to the one side focal point of LED chip.Due to LED
The area of chip 3 is in 1mm2—10mm2In the range of obtained collimation efficiency it is best, under the premise of collimation efficiency is ensured, work as coke
Away from it is long when, must increase the light extraction bore of colimated light system, when so extending more LED arrays again, corresponding total light-emitting area will
It can increase, i.e., entire light-emitting device volume is excessive, and manufactures high expensive.When focal length is shorter, same chip size is burnt
Away from shorter, the collimating effect of colimated light system is undesirable, i.e., collimated divergence of beam angle is still bigger.Therefore it is same in collimation lens
Under the premise of the collection light efficiency of sample, suitable control rear cut-off distance can reduce cost.
The LED chip is located near the combined focal or focus of collimation lens in the range of 1mm.
When LED chip is in the position of colimated light system combined focal, after the collimated lens of light that LED chip is sent out
Form directional light or the beam emissions close to directional light；When LED chip is provided close to collimation lens direction far from focus, meeting
Cause the irradiant effect of collimation lens undesirable, that is, the beam divergence angle after collimating is bigger than normal；Otherwise to be relatively distant from collimation
When lens direction is far from focus, the light emitting anger that colimated light system collects LED light line can be caused less than normal, so as to influence collimating lens system
Efficiency.Therefore the position of LED chip is preferably provided near the combined focal or focus of collimation lens in the range of 1mm.
The high refractive index of first collimation lens 1 is in the refractive index of the second collimation lens 2, second collimation lens 2
The material of selection is Pyrex materials, high-boron-silicon glass or B270 materials.
As shown in Fig. 2, between the light emitting anger of LED is 150 °~180 °, after collimated lens system collimation, the LED angles of divergence
It is narrowed between 15 °~32 °.
As shown in figure 3, including several groups of LED chips 3, the LED chip 3 is in array distribution, and the collimation lens with
LED chip 3 corresponds matrix arrangement.It is 6-10mm per the spacing between adjacent collimation lens optical axis center two-by-two, second
It is seamless spliced between collimation lens and the edge of third collimation lens and neighboring collimator lens.
As shown in Figure 4 and Figure 5, every group of LED chip 3 and the front row in array distribution or heel row two adjacent groups LED chip 3 it
Between position relationship be in equilateral triangle relationship, the collimation lens and the front row in array distribution or heel row two adjacent groups are accurate
Position relationship between straight lens is in the relationship of equilateral triangle.
Because for the LED chip 3 of array arrangement, 3 optical efficiency of LED chip positioned at corner is relatively low, by every group of LED core
Piece 3 is designed to and in the position relationship between the front row of array distribution or heel row two adjacent groups LED chip in equilateral triangle
Relationship so that the LED chip between row and column under the premise of ensureing to radiate, is rejected on array corner into the mode mutually staggered
The relatively low LED chip 3 of optical efficiency, this is laid out the overall dimension for reducing LED entirety arrangement modes, that is, reduces total shine
Area advantageously reduces etendue so that the optical efficiency higher of colimated light system.
Embodiment 2
As shown in fig. 6, the present embodiment and the difference of embodiment 1 are, the first collimation lens 1 it is adjacent with LED chip 3 one
Face is concave structure.
First collimation lens 1 one side adjacent with LED chip 3 is concave structure, and the position of ladle cover is formed to LED chip 3
Relationship so as to which the light for being sent out LED chip 3 is preferably received by the first collimation lens 1, improves the optics profit of colimated light system
With rate.
Claims (10)
1. a kind of LED collimation system, which is characterized in that be sequentially distributed to go out on optical channel in LED including LED chip and 2 or more
Collimation lens, the combined focal length range of the collimation lens is 3-8mm, the combined focal length and the colimated light system light-emitting window
The ratio range of diameter is 0.4-0.8, and the rear cut-off distance range of the colimated light system is 0-3mm.
2. a kind of LED collimation system according to claim 1, which is characterized in that be sequentially distributed including 2 or 3 in LED
Go out the collimation lens on optical channel, the collimation lens is by the distance with LED chip from closely to be divided into the first collimation saturating to remote
Mirror, the second collimation lens and third collimation lens.
3. a kind of LED collimation system according to claim 2, which is characterized in that the collimation lens is planoconvex spotlight.
4. a kind of LED collimation system according to claim 2, which is characterized in that the LED chip is located at collimation lens
Near combined focal or focus in the range of 1mm.
5. a kind of LED collimation system according to claim 2, which is characterized in that first collimation lens and LED chip
Adjacent one side is concave structure.
6. a kind of LED collimation system according to claim 2, which is characterized in that first collimation lens, the second collimation
The size of lens and third collimation lens is sequentially increased.
A kind of 7. LED collimation system according to claim 2, which is characterized in that the refractive index of first collimation lens
Higher than the refractive index of the second collimation lens, material that second collimation lens and third collimation lens are selected is Pyrex materials,
High-boron-silicon glass or B270 materials.
8. a kind of LED collimation system according to claim 2, which is characterized in that including several groups of LED chips, the LED
Chip is in array distribution, and the collimation lens corresponds matrix arrangement with LED chip.
9. a kind of LED collimation system according to claim 8, which is characterized in that every group of LED chip is with being in array distribution
Position relationship between front-seat or heel row two adjacent groups LED chip is in the relationship of equilateral triangle, and the collimation lens is with being in battle array
Position relationship between the front row of column distribution or heel row two adjacent groups collimation lens is in the relationship of equilateral triangle.
10. a kind of LED collimation system according to claim 9, which is characterized in that per collimation lens optical axis adjacent two-by-two
Spacing between center is 6-10mm, seamless between the second collimation lens and the edge of third collimation lens and neighboring collimator lens
Splicing.
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| CN201721745003.3U CN207486479U (en) | 2017-12-14 | 2017-12-14 | A kind of LED collimation system |
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| CN201721745003.3U CN207486479U (en) | 2017-12-14 | 2017-12-14 | A kind of LED collimation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308441A (en) * | 2018-12-12 | 2020-06-19 | 宁波舜宇车载光学技术有限公司 | Laser radar transmitting device and assembling method |
| CN113156777A (en) * | 2021-04-28 | 2021-07-23 | 苏州赛源光学科技有限公司 | A lighting module for maskless exposure |
| CN114488538A (en) * | 2022-02-28 | 2022-05-13 | 歌尔股份有限公司 | AR ray apparatus and head-mounted display device |
-
2017
- 2017-12-14 CN CN201721745003.3U patent/CN207486479U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308441A (en) * | 2018-12-12 | 2020-06-19 | 宁波舜宇车载光学技术有限公司 | Laser radar transmitting device and assembling method |
| CN113156777A (en) * | 2021-04-28 | 2021-07-23 | 苏州赛源光学科技有限公司 | A lighting module for maskless exposure |
| CN114488538A (en) * | 2022-02-28 | 2022-05-13 | 歌尔股份有限公司 | AR ray apparatus and head-mounted display device |
| CN114488538B (en) * | 2022-02-28 | 2024-02-09 | 歌尔光学科技有限公司 | AR ray apparatus and wear display device |
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Legal Events
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190425 Address after: 510660 Dehao Innovation Park, No. 2 Ruitai Road, Kaitai Avenue, Guangzhou High-tech Industrial Development Zone, Guangdong Province Patentee after: Guangzhou Guang Lian Electronic Technology Co., Ltd. Address before: 342324 Yudu County Industrial Park, Ganzhou City, Jiangxi Province Patentee before: Ganzhou Guang Lian Electronic Technology Co., Ltd. |
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| TR01 | Transfer of patent right |