CN107178764A - A kind of compound Fresnel Lenses suitable for navigation light Optical devices - Google Patents
A kind of compound Fresnel Lenses suitable for navigation light Optical devices Download PDFInfo
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- CN107178764A CN107178764A CN201610132185.0A CN201610132185A CN107178764A CN 107178764 A CN107178764 A CN 107178764A CN 201610132185 A CN201610132185 A CN 201610132185A CN 107178764 A CN107178764 A CN 107178764A
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- refraction
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- plane
- light
- fresnel lenses
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- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000003670 easy-to-clean Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 6
- 238000003491 array Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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Classifications
-
- 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
- F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
-
- 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
Abstract
A kind of compound Fresnel Lenses suitable for navigation light Optical devices, is made up of internal refraction face 11, Fresnel reflections face 12 and dalta wing plane of refraction 13 as shown in Figure 1, wherein, internal refraction face 11 is made up of plane of refraction 111,112,113；Fresnel reflections face 12 is made up of plane of refraction 121,122；Dalta wing plane of refraction 13 is made up of fully reflecting surface 132, outer refractive face 131.The some light that lamp bead is sent is converged to a small angle range by plane of refraction 111 and Fresnel reflections face 121:In ± 3 °-± 10 °；The remainder light for again being sent lamp bead by plane of refraction 112, fully reflecting surface 132 and outer refractive face 131 is inversely evenly distributed in above-mentioned small angle range.The characteristics of due to the compound Fresnel Lenses optical texture, the light beam that can send lamp bead is effectively transmitted, and energy loss is few, improves the efficiency of light energy utilization, and its outer can use smooth coniform Transparent lamp shade, maintenance easy to clean.
Description
Technical field
The present invention relates to navigation light field of optical applications, more particularly to it is a kind of suitable for the compound of navigation light Optical devices
Fresnel Lenses.
Background technology
Navigation light is to navigate by water a kind of traffic lights being arranged on some facilities in night safe for guarantee ship.1912
Sweden engineer Gustaf Da Lunyin invention navigation mark lighthouses automaton ensures that navigation safety obtains Nobel's physics
Prize., IALA in 1966（International navigation mark tissue）Disclose on the relation between navigation light light intensity and range, its main purpose is
Light effective range of the specification under different meteorological optical ranges, so as to provide reference frame for the design of navigation light.It is general cognitive
Under, under equal energy consumption, light range is improved as much as possible, is to improve the effective hand for ensureing ship night flight or navigation security capabilities
Section.
Navigation light is mainly made up of energy resource system, light source, optical system etc., and each component part is sent out with the development of science and technology
Exhibition.At present, energy resource system is mainly using batteries to store energy, solar panel charging as mainly form is applied, and light source is then with plurality of LEDs string
Based on connection, parallel connection etc., optical system is based on Fresnel lampshade, and it can be by the light collection sent by LED in certain angle model
Launch to improve the effective range of lamp in enclosing.
Fresnel Lenses is to be invented by French physician Augustin-Jean Fresnel in 1822.Such as Fig. 2 institutes
Show, in terms of section, its surface is made up of a series of sawtooth pattern steps, each step can be regarded as one independent small
Mirror, so that light is adjusted to directional light or optically focused, its spotlight effect is well more many than common convex lens, therefore Fresnel Lenses
It is widely used in the shaping in terms of the collimation of light beam and focusing.Such as patent US7800840B2 provides a kind of apply
, can be by LED beam shaping in the design method of the Fresnel Lenses of the flashing optical system regions of LED illumination, mobile phone or camera
Into the class ellipse light spot with spatial symmetry, central peak light intensity is significantly lifted；Patent US2004095777A is proposed
A kind of efficient LED navigation mark modulator, is applied to navigation light lampshade by the advantage in terms of Fresnel Lenses collimation and focusing, effectively carries
The high efficiency of light energy utilization.
The characteristics of being applied due to navigation light, along with the laciniation of Fresnel lampshade, is chronically exposed to geavy salt mist, big
Navigation light under the adverse circumstances such as humidity, the big temperature difference, its Fresnel cover surface easily deposits dust, greasy dirt, so as to influence lamp
The transmissivity of light, and the Fresnel lampshade of laciniation is not convenient for cleaning and safeguard, the effect of prolonged application is affected；
There is data to suggest that after 1 year light brightness decay reduction, or even up to 20-30%.
Light source is also to influence a key factor of navigation light lamp efficiency.Existing navigation light is how small using direct plugging-in
Power LED lamp bead, such lamp bead is generally epoxy encapsulation lens, and this epoxy resin is the non-conductor of heat, heat conduction system
Number is generally 0.2W/ (m.K), and epoxy resin works long hours easy aging at relatively high temperatures, so that light decay is produced, and straight cutting
Type LED lamp bead is electrically connected using common substrate copper-clad plate (CCL), is unfavorable for LED radiatings, and the serious LED that shortens makes
Use the life-span.2 months 2005 Zheng Dai-shun, Qian Ke-yuan, Luo Yi etc. exist《Semiconductor
Optoelectronics》Deliver《Life Test and Failure Mechanism Analyses for High-power
LED》, labor LED light decay characteristic and Producing reason, it is indicated that the epoxy resin that temperature is raised and ultraviolet irradiation is caused
Transparency degradation, is the major reason that LED light declines.
With the development of science and technology, the encapsulation technology technique of LED lamp bead has also obtained further development, is embodied in LED
Power it is higher, brightness is brighter, light source is concentrated, assembling easily, the advantages of package cooling mode is more advanced, therefore use big work(
Rate LED is as the development trend of the lamp source, undoubtedly this area of navigation light, but its corresponding optical system also needs further
Design.For example patent CN200710117721.0 proposes a kind of navigation mark lamp unit and its application.The invention can be by from LED light
The light that source is sent collimates compression in one direction, while light intensity can accurately be controlled very much in another vertical direction
Distribution, so as to design the optical system of structure closely according to actual lighting demand.
Therefore, according to the characteristics of sector application, with reference to the development of scientific and technological level, to innovating again for each component part of navigation light
Design, undoubtedly contributes to meet overall goal and the requirement of navigation light " light is bright, sighting distance is enough ".
It can be seen that the light that the general Fresnel lampshade that traditional navigation light is used is sent to direct plugging-in low-power LED lamp bead
Beam is focused shaping, there is that its focusing effect is undesirable, the efficiency of light energy utilization is not high, and the later stage, to clear up difficult in maintenance, light decay tight
The problems such as weight.
The content of the invention
Applicant in this case proposes " a kind of navigation light Optical devices based on compound Fresnel Lenses "（Propose on the same day
Utility application）.The Optical devices are made up of LED/light source, lens, cooling system etc..Wherein, LED/light source is paster
Formula great power LED；Lens are compound Fresnel Lenses involved in the present invention；Cooling system is by PCB aluminium bases, radiating branch
Frame, upper plate, lower shoe, the composition such as transparent plastic lampshade.LED lamp bead reflow soldering is on PCB aluminium bases, with compound luxuriant and rich with fragrance alunite
That lens, cooling stand are together constituted a luminescence unit, and arranged with certain amount in the way of circumference array.Cooling stand
It is uniform between above-mentioned luminescence unit to smear outside heat-conducting silicone grease, luminescence unit with the encirclement of transparent plastic lampshade.
The present invention needs the traditional navigation light solved to be sent using Fresnel lampshade to direct plugging-in low-power LED lamp bead
Light beam is focused shaping, and its focusing effect is undesirable, the efficiency of light energy utilization is not high, and the difficult in maintenance, light decay of later stage cleaning is serious
The problems such as.
To solve the above problems, the invention provides a kind of design method of compound Fresnel Lenses.As shown in Figure 1：
The lens are made up of internal refraction face 11, Fresnel reflections face 12 and dalta wing plane of refraction 13.Wherein, internal refraction face 11 is by rolling over
Penetrate the composition of face 111,112,113；Fresnel reflections face 12 is made up of plane of refraction 121,122；Dalta wing plane of refraction 13 is by being totally reflected
Face 132, outer refractive face 131 are constituted.
A) some light that the internal refraction face 111 and Fresnel reflections face 121 of the lens send LED lamp bead converges
Gather in the range of low-angle ± 3 °-± 10 °；
B) residue that the internal refraction face 112 of the lens, fully reflecting surface 132 and outer refractive face 131 send LED lamp bead
Some light is inversely evenly distributed in above-mentioned small angle range again.
Due to the optical texture feature of lens of the present invention, the light beam that can send LED passes through Fresnel reflections face, total reflection
Face is effectively transmitted, and substantially noenergy is lost, and improves the efficiency of light energy utilization, and its outer can be with smooth transparent
Plastic lamp shade is surrounded, and easily carries out cleaning.
The purpose of the present invention, feature and advantage will be described in detail by embodiment and with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is compound Fresnel Lenses XZ in-plane sectional views.
Fig. 2 is Fresnel reflections face sawtooth pattern step XZ in-plane sectional views.
Fig. 3 is compound Fresnel Lenses Fresnel reflections face light path principle figure.
Fig. 4 is compound Fresnel Lenses dalta wing plane of refraction light path principle figure.
Fig. 5 is the schematic diagram using 6 LEDs lamp bead arrays.
Fig. 6 is the schematic diagram using 6 LEDs lamp bead arrays.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
The invention provides a kind of compound Fresnel Lenses, as shown in Figure 1：The lens are by internal refraction face 11, Fei Nie
That plane of refraction 12 and dalta wing plane of refraction 13 are constituted.Wherein, internal refraction face 11 is made up of plane of refraction 111,112,113；Fei Nie
You are made up of plane of refraction 12 plane of refraction 121,122；Dalta wing plane of refraction 13 is made up of fully reflecting surface 132, outer refractive face 131.
Above-mentioned internal refraction face 11 constitutes a cavity, and the cavity can be used to install LED/light source.LED/light source in cavity
The some light sent（In the present embodiment, we take the light of this part to be -30 ° to 30 ° angular ranges）, by the inside of cavity
Plane of refraction 111 enters, and is projected by Fresnel reflections face 12.The light that LED is sent internally plane of refraction 112 and Fresnel reflections
Face 12 is reflected, and the light after refraction is drawn close to the optical axis of lens, plays optically focused.
Above-mentioned plane of refraction 121 is the spherical convex lens face raised up, and its radius of curvature span is 6-10mm, preferably
8.2mm.The convex lens is towards protruding above, and center and the optical axis coincidence of lens of sphere, the dipped beam axial ray sent to LED/light source
Play a part of to focus on, by adjusting the radius of curvature of convex lens, to adjust focal length, and then adjust the optically focused angle of LED/light source.
As shown in Fig. 2 the sawtooth pattern step that above-mentioned plane of refraction 122 is made up of the different concentric circles of several radiuses is constituted.
Wherein, sawtooth pattern step span：2-8.In the present embodiment, sawtooth pattern step has 3, the height h scopes of each step
It is descending for 0.5-2mm, preferably 1.55mm, 1.2mm, 0.8mm；The width k scopes of each step are 1.5-3mm, by big
To small, preferably 2.5mm, 2mm, 1.8mm.Height h of each sawtooth pattern step one side along optical axis direction on plane of refraction 122 is not
Together, closer to the step at lens axis center, its shoulder height is bigger；It is on the other hand different along the spacing k in vertical optical axis direction,
Step closer to lens axis center, its step width is bigger.By adjusting shoulder height h and spacing k, it can be achieved to outgoing
The adjustment of light angle.
As shown in Figure 3：By above-mentioned step, -30 ° of light to 30 ° of angular ranges that LED is sent converges to one
Fixed angular range ± 3 °-± 10 °.In the present embodiment, preferably ± 4 °.
As shown in Figure 4：The remainder light sent by the LED/light source in cavity（In the present embodiment, -30 ° to 30 ° are taken
Light outside angular range）Behind internal refraction face 113 and fully reflecting surface 132, light becomes contrary distribution from top to bottom, then passes through
Cross behind outer refractive face 131, the light of injection is inversely overlapping to be distributed in ± 4 ° of above-mentioned angular ranges.
Above-mentioned internal refraction face 113 is an inclined straightway, and the inclination angle scope of itself and optical axis is 0 ° of -45 °, this implementation
In example, preferably 10 °.
Above-mentioned fully reflecting surface 132 is free curve section.Its calculation procedure is as follows：
It is assumed that the angle of light 1 and optical axis is a, the angle of plane of refraction 113 and optical axis is b,
Then the linear equation of light 1 is：y=tg(π/2-a)*x (1)
The linear equation of plane of refraction 113：y=tg(π/2-b)*x+L1 (2)
Equation（1）、（2）The intersecting point coordinate of light 1 and plane of refraction 113 can be tried to achieve（c,d）;
Assuming that the incidence angle of light 1 is a1, according to sine：sin(π/2-a)/[d/sin(b)]=sin(a1)/[c-d/tg(b)] (3)
Assuming that the refraction angle of the first time refracted light 2 of light 1 is a3,
According to the law of refraction of light: n1*sin(a1)=n2*sin(a3) (4)
The linear equation of the first time refracted light 2 of light 1 can be tried to achieve:y=tg{b-arcsin[n1*sin(a1)/n2]}*x+d (5)
According to the total reflection law of light, the tangential equation on fully reflecting surface 132 can obtain：
y=tg(π/4-{b- arcsin[n1*sin(a1)/n2]}/2)*x+L2 (6)
Because the angle a and plane of refraction 113 of light 1 and optical axis and the angle of optical axis are that b is datum, initialization L1, L2, i.e.,
Can pointwise obtain point coordinates on fully reflecting surface 132.
In the present embodiment, total reflection light is vertical optical axis direction.
Due to be totally reflected light incident angle, it is known that and radiation direction after required refraction, it is known that according to the law of refraction
Easily obtain the slope in outer refractive face 131.
In the present embodiment, above-mentioned outer refractive face 131 is straightway, and the inclination angle scope of itself and optical axis is 30 ° -60 °, this
In embodiment, preferably 55 °.
So far, the internal refraction face 11 of compound Fresnel Lenses main body is constituted；Fresnel reflections face 12；Dalta wing is reflected
Curve of the face 13 in XZ in-planes section has all been obtained；
The curve in the XZ sections that calculating is obtained rotates 180 ° around Y-axis, that is, obtains the physical model of compound Fresnel Lenses.
Fig. 5, Fig. 6 is respectively using 6,8 LEDs lamp bead arrays.
XZ planes at receiving plane are simulated at 1500mm in certain optical software using 6,8 LEDs lamp bead arrays respectively
Light spot illumination distribution map on direction, has obtained good compression, in length from simulation it can be seen from the figure that hot spot this side up
Square plaque-like.
The surface of intensity distribution in YZ planes is simulated in certain optical software using 6,8 LEDs lamp bead arrays respectively, from mould
Intend it can be seen from the figure that light intensity uniformity on this direction very high, more than 90%.
Simply technical scheme is explained in detail for above-mentioned embodiment, the present invention not only only office
It is limited to above-described embodiment, every any improvement or replacement according to the principle of the invention all should be within protection scope of the present invention.
Claims (6)
1. a kind of compound Fresnel Lenses, is made up of internal refraction face 11, Fresnel reflections face 12 and dalta wing plane of refraction 13；
Wherein, internal refraction face 11 is made up of plane of refraction 111,112,113；Fresnel reflections face 12 is made up of plane of refraction 121,122；Three
Angle blade plane of refraction 13 is made up of fully reflecting surface 132, outer refractive face 131；The internal refraction face 111 of the lens and Fresnel folding
Penetrate face 121 and some light that LED lamp bead is sent is converged into a small angle range：In ± 3 °-± 10 °；The lens it is interior
The remainder light that portion's plane of refraction 112, fully reflecting surface 132 and outer refractive face 131 send LED lamp bead is again reverse uniform
It is distributed in above-mentioned small angle range.
2. compound Fresnel Lenses according to claim 1, it is characterised in that：The plane of refraction 121 is to raise up
Spherical convex lens face, and center and the optical axis coincidence of lens of sphere, its radius of curvature span are 6-10mm, preferably
8.2mm。
3. compound Fresnel Lenses according to claim 1, it is characterised in that：The plane of refraction 122 by several half
The sawtooth pattern step composition that the different concentric circles in footpath is constituted；Wherein, sawtooth pattern step span：2-8, preferably 3；Each
The height h scopes of step are 0.5-2mm, descending, preferably 1.55mm, 1.2mm, 0.8mm；The width k scopes of each step
It is descending for 1.5-3mm, preferably 2.5mm, 2mm, 1.8mm.
4. compound Fresnel Lenses according to claim 1, it is characterised in that：Internal refraction face 113 is one inclined
Straightway, the inclination angle scope of itself and optical axis is 0 ° -45 °, preferably 10 °.
5. compound Fresnel Lenses according to claim 1, it is characterised in that：Outer refractive face 131 is straightway, its
Inclination angle scope with optical axis is 30 ° -60 °, preferably 55 °.
6. compound Fresnel Lenses according to claim 1, it is characterised in that：With certain amount with the side of circumference array
Formula is arranged, and its quantitative range is equal to 3 to be big, and preferably 6,8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610132185.0A CN107178764A (en) | 2016-03-09 | 2016-03-09 | A kind of compound Fresnel Lenses suitable for navigation light Optical devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610132185.0A CN107178764A (en) | 2016-03-09 | 2016-03-09 | A kind of compound Fresnel Lenses suitable for navigation light Optical devices |
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| Publication Number | Publication Date |
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| CN107178764A true CN107178764A (en) | 2017-09-19 |
Family
ID=59829633
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610132185.0A Pending CN107178764A (en) | 2016-03-09 | 2016-03-09 | A kind of compound Fresnel Lenses suitable for navigation light Optical devices |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10823370B2 (en) | 2018-09-20 | 2020-11-03 | Federal Signal Corporation | Light beacon lens |
| CN113847578A (en) * | 2021-10-23 | 2021-12-28 | 福建吉星智能科技股份有限公司 | Combined rotating curved lens for beacon light and working method thereof |
| CN113915550A (en) * | 2021-10-23 | 2022-01-11 | 福建吉星智能科技股份有限公司 | Navigation mark lamp optical device and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20040014358A (en) * | 2002-08-09 | 2004-02-14 | 다이니폰 인사츠 가부시키가이샤 | Fresnel lens sheet and rear projection screen including the same |
| CN101101156A (en) * | 2007-07-23 | 2008-01-09 | 上海海想自动控制技术有限公司 | Solar water heater |
| US20080231772A1 (en) * | 2007-03-21 | 2008-09-25 | Chi Mei Optoelectronics Corp. | Flat panel display and fabrication method thereof |
| CN102297363A (en) * | 2011-06-24 | 2011-12-28 | 上海南华机电有限公司 | Middle-light-intensity aviation obstacle light |
| CN205669770U (en) * | 2016-03-09 | 2016-11-02 | 福建吉星智能科技股份有限公司 | A kind of compound Fresnel Lenses being applicable to navigation light Optical devices |
-
2016
- 2016-03-09 CN CN201610132185.0A patent/CN107178764A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040014358A (en) * | 2002-08-09 | 2004-02-14 | 다이니폰 인사츠 가부시키가이샤 | Fresnel lens sheet and rear projection screen including the same |
| US20080231772A1 (en) * | 2007-03-21 | 2008-09-25 | Chi Mei Optoelectronics Corp. | Flat panel display and fabrication method thereof |
| CN101101156A (en) * | 2007-07-23 | 2008-01-09 | 上海海想自动控制技术有限公司 | Solar water heater |
| CN102297363A (en) * | 2011-06-24 | 2011-12-28 | 上海南华机电有限公司 | Middle-light-intensity aviation obstacle light |
| CN205669770U (en) * | 2016-03-09 | 2016-11-02 | 福建吉星智能科技股份有限公司 | A kind of compound Fresnel Lenses being applicable to navigation light Optical devices |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10823370B2 (en) | 2018-09-20 | 2020-11-03 | Federal Signal Corporation | Light beacon lens |
| CN113847578A (en) * | 2021-10-23 | 2021-12-28 | 福建吉星智能科技股份有限公司 | Combined rotating curved lens for beacon light and working method thereof |
| CN113915550A (en) * | 2021-10-23 | 2022-01-11 | 福建吉星智能科技股份有限公司 | Navigation mark lamp optical device and working method thereof |
| CN113847578B (en) * | 2021-10-23 | 2023-11-14 | 福建吉星智能科技股份有限公司 | Combined rotating curved surface lens for navigation mark lamp and working method thereof |
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Application publication date: 20170919 |