CN208457590U - One kind defocusing reflective coupler - Google Patents
One kind defocusing reflective coupler Download PDFInfo
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- CN208457590U CN208457590U CN201820632363.0U CN201820632363U CN208457590U CN 208457590 U CN208457590 U CN 208457590U CN 201820632363 U CN201820632363 U CN 201820632363U CN 208457590 U CN208457590 U CN 208457590U
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- coupler
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Abstract
The utility model discloses one kind and defocuses reflective coupler: including coupler (2), coupler (2) both ends are separately connected LED light source (1) and optical fiber (3)；Coupler (2) inner hollow forms reflection cavity (4), and reflection cavity (4) is in dewdrop shape；Coupler (2) inner surface has rotational symmetry.The utility model structure is simple, at low cost, easy to use, can be realized efficient light coupling, and guarantees being uniformly distributed for light in light-conductive optic fibre, avoids causing to damage to optical fiber while improving optical fiber energy transmission efficiency to realize.
Description
Technical field
The utility model relates to light-guide illumination technical fields more particularly to one kind to defocus reflective coupler.
Background technique
Optical fiber light-guiding technology has been mature on the whole in communication field at present, and optical fiber light-guiding is illuminated in some low power decorations
More application is obtained in illumination, signal lamp and endoscope, and still has many difficulties in high-power illumination field and makes it difficult to
Large-scale promotion.
The major technical difficulty of large-power optical fiber light-guide illumination has the following aspects: first is that the light-emitting area of LED light source
It is too big with light emitting angle, cause the etendue of LED light source bigger than normal, is unfavorable for optical design；Second is that the power of LED light source is close
Degree is not big enough, causes number of fibers excessive, cost increase；Third is that the characteristics of luminescence of large power white light LED is usually class Lambertian,
The diameter of light-conductive optic fibre again cannot too thick (the thick material cost square exponential increase that can cause optical fiber), directly so that LED core
Coupler design between piece and light-conductive optic fibre is difficult, and coupling efficiency is relatively low；Fourth is that high power white light is coupled in optical fiber, due to
The inhomogeneities and fuel factor (or nonlinear effect) of Energy distribution easily cause burning out for optical fiber.Fifth is that the light of coupled into optical fibres
The angle of divergence of harness is too big, and order of reflection causes the index of reflection loss to increase too much in guide-lighting transmission process.
Utility model content
The purpose of the utility model is to provide one kind to defocus reflective coupler.The utility model structure is simple, cost
It is low, it is easy to use, it can be realized efficient light coupling, and guarantee being uniformly distributed for light in light-conductive optic fibre, to realize
While improving optical fiber energy transmission efficiency avoid that optical fiber is caused to damage.
Technical solutions of the utility model:
One kind defocusing reflective coupler, including coupler, and coupler both ends are separately connected LED light source and optical fiber；It is described
Coupler inner hollow forms reflection cavity, and reflection cavity is in dewdrop shape；The coupler inner surface has rotational symmetry.
The coupler rounded bottom is fixedly connected with LED light source, and coupler tip top connects optical fiber；The LED light source
It is arranged on coupler central axes with optical fiber.
The coupler inner surface bus continuous and derivable, curvature distribution is in the dullness point that LED light source section is big and optical fiber end is small
Cloth feature.
The coupler inner surface is equipped with reflectance coating, and the reflectance coating is in visible light, near-infrared and black light spectral limit
With high reflectance.
The LED light Source size and fibre diameter meet marginal ray principle.
For the coupler inner surface bus using LED light source as coordinate origin, coupler central axes are x-axis, in coupler
The zeroaxial normal of axis is to be generated jointly in the coordinate system of y-axis by following reflection equation and mapping relations,
Wherein, P is the point on coupler inner surface, and F is focus, and OP is incident light, and PF is reflected light,It is pressed from both sides for OP and x-axis
Angle,kFor mapping coefficient, indicate focus x coordinate withMapping relations；
For incidence angle,；For angle of reflection,；
It is unit normal vector,；
The unit vector of incident light,；
The unit vector of reflected light,；
Law vector → n of P point is crossed,。
The coupler inner surface bus also meets: the spatial light distribution of LED light source is,, wherein it is
LED light source normal orientation is (i.e.Coordinate direction) on light intensity.
The coupler inner surface bus also meets: focusCoordinate,；Wherein xeIt is farthest
Hold the x coordinate of focus, x0It is the x coordinate of most proximal end focus.
Compared with prior art, the light that the utility model LED light source issues enters in optical fiber after coupler reflects
The feature that light shafts have the angle of divergence small, central shaft and light-conductive optic fibre center overlapping of axles, can be effectively reduced optical fiber light-guiding mistake
Reflection loss in journey improves whole guide-lighting efficiency
The light that the utility model states LED light source sending enters in optical fiber after coupler reflects, and does not form single focus,
But the dispersed distribution along fiber optic hub axis a certain range；So that light energy distribution is uniform, it is not easy to cause burning out for optical fiber.
The utility model LED light Source size and fibre diameter meet marginal ray principle, and cost is controllable, the LED chip of LED light source
It is high with fiber coupling rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the utility model P point coordinate diagram.
The label in accompanying drawing is: 1-LED light source, 2- coupler, 3- optical fiber, 4- reflection cavity.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and examples, but is not intended as limiting the utility model
The foundation of system.
Embodiment 1.
One kind defocusing reflective coupler, as shown in Figure 1, including coupler 2,2 both ends of coupler are separately connected LED light source
1 and optical fiber 3；2 inner hollow of coupler forms reflection cavity 4, and reflection cavity 4 is in dewdrop shape；2 inner surface of coupler has
Rotational symmetry.
2 rounded bottom of coupler is fixedly connected with LED light source 1, and 2 tip top of coupler connects optical fiber 3；The LED
Light source 1 and optical fiber 3 are arranged on 2 central axes of coupler.
The 2 inner surface bus continuous and derivable of coupler, curvature distribution is in the dullness point that LED light source section is big and optical fiber end is small
Cloth feature.
2 inner surface of coupler is equipped with reflectance coating, and the reflectance coating is in visible light, near-infrared and black light spectral limit
With high reflectance.
1 size of LED light source and 3 diameter of optical fiber meet marginal ray principle.
Marginal ray principle refers to: if the light that a light source with the exhibition of certain light issues passes through one or several serializings
Dull canonical optical surface optical effect after invest target face formed hot spot, then entire two-phonon process have following two
Matter: one) marginal ray of light source becomes the marginal ray of hot spot, and two) the interior light of light source is mapped as the interior light of hot spot, and keeps the topology of light
Structure is constant." nonimaging optics design " (Science Press, 2016) write with reference to Zhang Hang.
As shown in Fig. 2, the 2 inner surface bus of coupler is being coordinate origin with LED light source 1,2 central axes of coupler are
X-axis, the zeroaxial normal in 2 central axes of coupler be y-axis coordinate system in, it is common by following reflection equation and mapping relations
It generates,
Wherein, P is the point on 2 inner surface of coupler, and F is focus, and OP is incident light, and PF is reflected light,For OP and x-axis
Angle,kFor mapping coefficient, focus x coordinate and light are indicatedMapping relations；
For incidence angle,；For angle of reflection,；
It is unit normal vector,；
The unit vector of incident light,；
The unit vector of reflected light,；
Law vector → n of P point is crossed,。
The 2 inner surface bus of coupler also meets: the spatial light distribution of LED light source 1 is,, wherein
It is the light intensity on LED light source normal orientation (i.e. coordinate direction).
The 2 inner surface bus of coupler also meets: focusCoordinate,；Wherein xeIt is farthest
Hold the x coordinate of focus, x0It is the x coordinate of most proximal end focus.
When work, the light that LED light source issues enters in light-conductive optic fibre after coupler reflects, and then is passed by light-conductive optic fibre
Lead distal end.The light shafts that the light that the utility model LED light source issues enters after coupler reflects in optical fiber have diverging
The small feature in angle, central shaft and light-conductive optic fibre center overlapping of axles, can be effectively reduced the reflection loss during optical fiber light-guiding,
It improves the light that whole guide-lighting efficiency the utility model states LED light source sending to enter in optical fiber after coupler reflects, not formed
Single focus, but the dispersed distribution along fiber optic hub axis a certain range；So that light energy distribution is uniform, it is not easy to cause optical fiber
It burns out.The utility model LED light Source size and fibre diameter meet marginal ray principle, and cost is controllable, the LED chip of LED light source and
Fiber coupling rate is high.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (5)
1. one kind defocuses reflective coupler, it is characterised in that: including coupler (2), coupler (2) both ends are separately connected LED
Light source (1) and optical fiber (3)；Coupler (2) inner hollow forms reflection cavity (4), and reflection cavity (4) is in dewdrop shape；The coupling
Clutch (2) inner surface has rotational symmetry.
2. according to claim 1 defocus reflective coupler, it is characterised in that: coupler (2) rounded bottom is solid
Surely LED light source (1) is connected, coupler (2) tip top connects optical fiber (3)；The LED light source (1) and optical fiber (3) are arranged in coupling
On clutch (2) central axes.
3. according to claim 1 defocus reflective coupler, it is characterised in that: coupler (2) the inner surface bus
Continuous and derivable, curvature distribution is in the dull distribution characteristics that LED light source section is big and optical fiber end is small.
4. according to claim 1 defocus reflective coupler, it is characterised in that: coupler (2) inner surface is equipped with
Reflectance coating, the reflectance coating have high reflectance in visible light, near-infrared and black light spectral limit.
5. according to claim 1 defocus reflective coupler, it is characterised in that: LED light source (1) size and optical fiber
(3) diameter meets marginal ray principle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820632363.0U CN208457590U (en) | 2018-04-28 | 2018-04-28 | One kind defocusing reflective coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820632363.0U CN208457590U (en) | 2018-04-28 | 2018-04-28 | One kind defocusing reflective coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208457590U true CN208457590U (en) | 2019-02-01 |
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ID=65151951
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820632363.0U Active CN208457590U (en) | 2018-04-28 | 2018-04-28 | One kind defocusing reflective coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613026A (en) * | 2018-04-28 | 2018-10-02 | 浙江光塔节能科技有限公司 | One kind defocusing reflective coupler |
-
2018
- 2018-04-28 CN CN201820632363.0U patent/CN208457590U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108613026A (en) * | 2018-04-28 | 2018-10-02 | 浙江光塔节能科技有限公司 | One kind defocusing reflective coupler |
| CN108613026B (en) * | 2018-04-28 | 2023-08-29 | 浙江光塔安全科技有限公司 | Defocused reflective coupler |
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Address after: Room e-405-406, No. 198, Qidi Road, Xiaoshan Economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Guangta Safety Technology Co., Ltd Address before: 310000 A-B102-1025 room 198, road, Xiaoshan economic and Technological Development Zone, Xiaoshan District, Hangzhou. Patentee before: ZHEJIANG GUANGTA ENERGY-SAVING TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |