CN106051507A - Anti-dazzle LED directional lamp based on photo-thermal integrated design and implementation method thereof - Google Patents
Anti-dazzle LED directional lamp based on photo-thermal integrated design and implementation method thereof Download PDFInfo
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- CN106051507A CN106051507A CN201610565001.XA CN201610565001A CN106051507A CN 106051507 A CN106051507 A CN 106051507A CN 201610565001 A CN201610565001 A CN 201610565001A CN 106051507 A CN106051507 A CN 106051507A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000000758 substrate Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 230000005672 electromagnetic field Effects 0.000 claims description 4
- 230000010354 integration Effects 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 210000003850 cellular structure Anatomy 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 208000002173 dizziness Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
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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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
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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
- F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention discloses an anti-dazzle LED directional lamp based on photo-thermal integrated design. The anti-dazzle LED directional lamp comprises a PCB, wherein the PCB is arranged in a shell; a reflection cup is connected with the PCB; an LED base plate is arranged in the reflection cup and is connected with a Fresnel lens; a fly's-eye lens is connected with the top of the reflection cup. The invention further discloses an implementation method of the anti-dazzle LED directional lamp based on photo-thermal integrated design. The anti-dazzle LED directional lamp based on photo-thermal integrated design has the characteristics of simple structure, low cost, excellent uniformity, low energy consumption, less luminous decay, excellent heat dissipation and the like.
Description
Technical Field
The invention relates to the technology of LED lamps, in particular to an anti-dazzle LED directional lamp based on photo-thermal integrated design and an implementation method thereof.
Background
At present, the COB chip cost performance of the domestic and foreign lighting industry is not high, the SMD paster module becomes an advantage due to high light efficiency and low price per unit area, but the single light source chip has relative independence, and the following technical problems can exist during light distribution and heat dissipation design: 1. the SMD paster module has high light efficiency in unit area, so that the energy consumption is high and the light attenuation is serious due to overhigh temperature in dense arrangement; 2. the uniformity of the illumination of the secondary light distribution design is difficult to control, so that the whole lamp can generate a dizzy effect; 3. the heat dissipation is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the anti-dazzle LED directional lamp based on the photo-thermal integrated design, which has the advantages of simple structure, low manufacturing cost, good uniformity, low energy consumption, less light attenuation and good heat dissipation.
The invention also provides a method for realizing the anti-dazzle LED directional lamp based on the photo-thermal integrated design.
In order to achieve the purpose, the invention adopts the following technical scheme: anti-dazzle LED directional lamp based on light and heat integrated design, including the PCB board, in the shell was located to the PCB board, reflection of light cup and PCB board were connected, in the reflection of light cup was located to the LED base plate, the LED base plate was connected with fresnel lens, and fly's eye lens is connected with reflection of light cup top.
The LED substrate is attached to the reflection cup, and the reflection cup is attached to the shell; the inner surface of the reflecting cup is designed into a free curved surface.
The shell is a heat-conducting plastic shell.
The surface of the fly-eye lens is of a cellular structure after fog surface treatment.
The outer edge of the Fresnel lens is provided with a clamping hook which is buckled on the bottom of the light reflecting cup.
A first adjustable free-form surface is arranged on the surface of the Fresnel lens; the fly-eye lens surface is provided with a second adjustable free-form surface.
The Fresnel lens is arranged on the focal length of the fly-eye lens.
And the reflecting surface of the reflecting cup is provided with an electroplated aluminum layer.
The surface of the Fresnel lens adopts a Fresnel concentric circle design.
The method for realizing the anti-dazzle LED directional lamp based on the photo-thermal integrated design comprises the following steps:
(1) free curved surface design of reflective cup
The design of the reflector with the free-form surface is a compensation type optical design for the insufficient central light intensity of an LED Lambert-type light source, namely the adjustment of the central light intensity of the reflector-type spotlight is mainly completed by the reflection of the free-form surface on the inner wall of the reflecting cup; slicing the reflecting cup to convert the free-form surface into a free-form curve for optical design; two free curves are set as the inner wall of the section of the light reflecting cup, light rays hit the highest point, namely, the light rays are within an angle range with the compensation optics being alpha 0, if the reflection angle is beta, the deviation angle between the reflection angle and the vertical direction is theta 0, and the bottom of the light reflecting cup can be divided into N sections from the highest point to the bottom of the light reflecting cup according to the integration and edge light principle, namely, delta Zn is h/N (N is 0,1,2, 3). According to the law of reflection, the following geometric relationship is obtained:
zn+1=zn-Δzn------------------------(4)
xn+1=xn-Δxn------------------------(5);
the initial correspondence is as follows:
z0=h
the coordinates of a plurality of points can be calculated, connected by smooth curves and rotated, and the reflector required by the optical design can be obtained;
(2) fresnel lens design
Splitting an incident ray into two components, wherein one component perpendicular to an incident plane is called an S component, and the other component is called a P component in the incident plane;
for the component S
Wherein,
by boundary conditions of electromagnetic fields
To obtain
ω1=ω1′=ω2cos i1y′=0,cos i2y=0;
I.e. to obtain the incident light, the reflected light and the refracted light will be in the same plane, and:
k1sin i1=k1sin i1′=k2sin i2
i1=i1′
n1sini1=n2sini2;
that is, fresnel gives the relationship of the amplitudes of the incident, reflected and refracted waves at the interface in the S component:
the position relation of the S component and the P component satisfies the right-handed spiral law, namely the amplitude relation of the P component can be calculated in sequence. At the moment, the calculated S component and the calculated P component are superposed through a superposition principle, and then a first adjustable free-form surface of the Fresnel lens can be obtained;
(3) fly's eye lens design
The light rays are refracted twice by the incident spherical surface and the emergent spherical surface to realize the required directional trend of the light rays;
regarding the LED light source as a point light source, when light is refracted by the bead surface, the light vector emitted by the refraction point is I:
the exit angle of the light source is phi 1, and the incident angle and the exit angle on the spherical surface are alpha 1 and alpha 2 respectively, namely
φI=φ1-α1+α2;
Under the condition that theta is the same, the relationship between the surface parameters of the free-form surface and phi 1, alpha 1 and alpha 2 is as follows:
when the target surface is uniformly illuminated, since the LED emits light in a lambertian manner and is rotationally symmetric, that is:
I[I (φ)]=I×cosφ
wherein X and Y are coordinate values of the vertex in the first quadrant, and phi is determined, namely the value of theta in the first quadrant is determined;
the position coordinates of the refraction point can be obtained, the position coordinates of other points can be obtained in the same way, and the position coordinates are connected by a smooth curve to form a second free-form surface on the required fly-eye lens;
(4) and assembling the same
The reflecting cup is connected with the PCB, the LED substrate is arranged in the reflector and connected with the Fresnel lens, the fly-eye lens is connected with the top of the reflector, and the PCB is arranged in the shell to finish assembly.
Compared with the prior art, the invention has the following advantages and effects:
1. the LED light source comprises a PCB, wherein the PCB is arranged in a shell, a reflecting cup is connected with the PCB, an LED substrate is arranged in the reflecting cup, the LED substrate is connected with a Fresnel lens, and a fly-eye lens is connected with the top of the reflecting cup; the LED lamp has the characteristics of simple structure, low manufacturing cost, good uniformity, low energy consumption, little light attenuation, good heat dissipation and the like.
2. The invention integrates optics and thermology, the reflection surface of the reflection cup is provided with the electroplated aluminum layer, the light is reflected by the mirror surface, the narrow beam angle design of the SMD patch module is realized, and the surface heat radiation is increased synchronously due to the surface electroplated aluminum treatment.
3. The Fresnel lens is optically designed according to the Fresnel principle, the material is reduced, the light transmittance is increased, the cellular microstructure is added on the surface of the fly eye lens, so that the light spots are uniform, the dizziness is reduced, the central light intensity is improved by arranging the Fresnel lens on the focal length of the fly eye lens, and meanwhile, the design of integrally wrapping the chip protects the chip from external pollution, so that the isolation and safety protection effects are achieved.
4. The fly-eye lens has the advantages that the inner clamping hook is arranged at the edge of the fly-eye lens and is bonded with the shell through glue, and the 100% waterproof effect is achieved.
5. The luminous efficiency of the COB spotlight can be more than 85lm/W, and is improved by 30% compared with that of the traditional COB spotlight.
6. The invention replaces the original combination form of the reflecting cup and the aluminum heat dissipation seat with the reflecting cup produced in the simple forming form by spinning, thereby reducing the number of suppliers, reducing the process steps of assembling the whole lamp, improving the supply capacity of the reflecting cup and improving the on-line production capacity.
Drawings
FIG. 1 is a schematic diagram of an explosion structure of an anti-dazzle LED directional lamp based on photo-thermal integrated design;
FIG. 2 is a schematic view of the reflector cup and the housing in close contact with each other;
FIG. 3 is a schematic view of a Fresnel lens according to the present invention;
FIG. 4 is a schematic view of the assembly of a fly-eye lens and a housing according to the present invention;
FIG. 5 is a light ray direction diagram after slicing in the present invention;
FIG. 6 is a schematic diagram of a Fresnel lens design according to the present invention;
fig. 7 is a ray tracing diagram of the fly-eye lens design in the present invention.
The reference numbers and names in the figures are as follows:
1 | PCB board | 2 | Outer casing |
3 | LED substrate | 4 | Reflecting cup |
5 | Fresnel lens | 6 | Fly-eye lens |
7 | Clamping hook |
Detailed Description
For the understanding of those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
as shown in figures 1-7, an anti-dazzle LED directional lamp based on photo-thermal integrated design comprises a PCB, wherein the PCB is arranged in a shell, a reflection cup is connected with the PCB, an LED substrate is arranged in the reflection cup and is connected with a Fresnel lens, and a fly-eye lens is connected with the top of the reflection cup.
In the embodiment, the LED substrate is attached to the reflection cup, and the reflection cup is attached to the shell; the inner surface of the reflecting cup is designed into a free curved surface; the shell is a heat-conducting plastic shell.
The surface of the fly-eye lens in the embodiment is of a cellular structure after matte treatment; the outer edge of the Fresnel lens is provided with a clamping hook which buckles the bottom of the reflecting cup; the edge of the fly-eye lens is provided with an inner clamping hook which is bonded with the shell through glue, so that the 100% waterproof effect is achieved.
The surface of the Fresnel lens in the embodiment is provided with a first adjustable free-form surface; a second adjustable free-form surface is arranged on the surface of the fly-eye lens; the Fresnel lens is arranged on the focal length of the fly-eye lens.
The reflection surface of the reflection cup in the embodiment is provided with the electroplated aluminum layer, the surface heat radiation is increased due to the surface electroplated aluminum treatment synchronously, the reflection cup is tightly attached to the shell, the heat is directly transferred to the plastic shell through the reflection cup, and the thermal resistance of air is reduced; fresnel lens surface adopts the design of fei nieer concentric circles, fine assurance light collimation control in save material, and whole parcel chip design has received external pollution to having protected the chip simultaneously, plays isolated and safety protection effect.
In the embodiment, for waterproofing, glue is coated on both the housing and the fly-eye lens assembly structure for waterproofing.
The implementation method of the anti-dazzle LED directional lamp based on the photo-thermal integrated design comprises the following steps:
(1) free curved surface design of reflective cup
The design of the reflector with the free-form surface is a compensation type optical design for the insufficient central light intensity of an LED Lambert-type light source, namely the adjustment of the central light intensity of the reflector-type spotlight is mainly completed by the reflection of the free-form surface on the inner wall of the reflecting cup; slicing the reflecting cup to convert the free-form surface into a free-form curve for optical design; the light after slicing is shown in fig. 5, two free curves are set as the inner wall of the section of the light reflecting cup, the light strikes the highest point, that is, the compensation optics is within an angle range of α 0, the deflection angle between the light reflecting cup and the vertical direction is θ 0 if the reflection angle is β, and the bottom of the light reflecting cup can be divided into N segments from the highest point to the bottom of the light reflecting cup according to the principle of integration and marginal light, that is, Δ Zn is h/N (N is 0,1,2,3. According to the law of reflection, the following geometric relationship is obtained:
zn+1=zn-Δzn------------------------(4)
xn+1=xn-Δxn------------------------(5);
the initial correspondence is as follows:
z0=h
the coordinates of a plurality of points can be calculated, connected by smooth curves and rotated, and the reflector required by the optical design can be obtained;
(2) fresnel lens design
The light enters the PC lens, reflection and refraction can occur on the surface of the lens, and the light has wave-particle duality, so that the light can be transmitted in the form of electromagnetic waves, namely the reflection and refraction laws of the light on the surface of the Fresnel lens can be obtained according to the boundary conditions of an electromagnetic field, and the problem of intensity distribution of the light on the surface of the lens is solved;
as shown in fig. 6, the incident light is decomposed into two components, one of which is perpendicular to the incident plane and called S component, and the other is in the incident plane and called P component;
for the component S
Wherein,
by boundary conditions of electromagnetic fields
To obtain
ω1=ω1′=ω2cos i1y′=0,cos i2y=0;
I.e. to obtain the incident light, the reflected light and the refracted light will be in the same plane, and:
k1sin i1=k1sin i1′=k2sin i2
i1=i1' (incident angle equals reflection angle)
n1sini1=n2sini2;
That is, fresnel gives the relationship of the amplitudes of the incident, reflected and refracted waves at the interface in the S component:
the position relation of the S component and the P component satisfies the right-handed spiral law, namely the amplitude relation of the P component can be calculated in sequence. At the moment, the calculated S component and the calculated P component are superposed through a superposition principle, and then a first adjustable free-form surface of the Fresnel lens can be obtained;
(3) fly's eye lens design
The light rays are refracted twice by the incident spherical surface and the emergent spherical surface to realize the required directional trend of the light rays, as shown in fig. 7:
regarding the LED light source as a point light source, when light is refracted by the bead surface, the light vector emitted by the refraction point is I:
the exit angle of the light source is phi 1, and the incident angle and the exit angle on the spherical surface are alpha 1 and alpha 2 respectively, namely
φI=φ1-α1+α2;
Under the condition that theta is the same, the relationship between the surface parameters of the free-form surface and phi 1, alpha 1 and alpha 2 is as follows:
r is the radius of the spherical surface;
when the target surface is uniformly illuminated, since the LED emits light in a lambertian manner and is rotationally symmetric, that is:
I[I (φ)]=1×cosφ
wherein X and Y are coordinate values of the vertex in the first quadrant, and phi is determined, namely the value of theta in the first quadrant is determined;
the position coordinates of the refraction point can be obtained, the position coordinates of other points can be obtained in the same way, and the position coordinates are connected by a smooth curve to form a second free-form surface on the required fly-eye lens;
(4) and assembling the same
The reflecting cup is connected with the PCB, the LED substrate is arranged in the reflector and connected with the Fresnel lens, the fly-eye lens is connected with the top of the reflector, and the PCB is arranged in the shell to finish assembly.
The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. Anti-dazzle LED directional lamp based on light and heat integration design, its characterized in that: including the PCB board, in the shell was located to the PCB board, reflection of light cup was connected with the PCB board, and in the reflection of light cup was located to the LED base plate, the LED base plate was connected with fresnel lens, and compound eye lens is connected with reflection of light cup top.
2. The anti-glare LED directional lamp based on photo-thermal integrated design according to claim 1, characterized in that: the LED substrate is attached to the reflection cup, and the reflection cup is attached to the shell; the inner surface of the reflecting cup is designed into a free curved surface.
3. The anti-glare LED directional lamp based on photo-thermal integrated design according to claim 1, characterized in that: the shell is a heat-conducting plastic shell.
4. The anti-glare LED directional lamp based on photo-thermal integrated design according to claim 1, characterized in that: the surface of the fly-eye lens is of a cellular structure after fog surface treatment.
5. The anti-glare LED directional lamp based on photo-thermal integrated design according to claim 1, characterized in that: the outer edge of the Fresnel lens is provided with a clamping hook which is buckled on the bottom of the light reflecting cup.
6. The anti-glare LED directional lamp based on photo-thermal integrated design according to claim 1, characterized in that: a first adjustable free-form surface is arranged on the surface of the Fresnel lens; the fly-eye lens surface is provided with a second adjustable free-form surface.
7. The anti-glare LED directional lamp based on photo-thermal integrated design according to claim 1, characterized in that: the Fresnel lens is arranged on the focal length of the fly-eye lens.
8. The anti-glare LED directional lamp based on photo-thermal integrated design according to claim 1, characterized in that: and the reflecting surface of the reflecting cup is provided with an electroplated aluminum layer.
9. The anti-glare LED directional lamp based on photo-thermal integrated design according to claim 1, characterized in that: the surface of the Fresnel lens adopts a Fresnel concentric circle design.
10. The method for realizing the anti-dazzle LED directional lamp based on photo-thermal integrated design according to any one of claims 1 to 9, characterized by comprising the following steps:
(1) free curved surface design of reflective cup
The design of the reflector with the free-form surface is a compensation type optical design for the insufficient central light intensity of an LED Lambert-type light source, namely the adjustment of the central light intensity of the reflector-type spotlight is mainly completed by the reflection of the free-form surface on the inner wall of the reflecting cup; slicing the reflecting cup to convert the free-form surface into a free-form curve for optical design; two free curves are set as the inner wall of the section of the light reflecting cup, light rays hit the highest point, namely, the light rays are within an angle range with the compensation optics being alpha 0, if the reflection angle is beta, the deviation angle between the reflection angle and the vertical direction is theta 0, and the bottom of the light reflecting cup can be divided into N sections from the highest point to the bottom of the light reflecting cup according to the integration and edge light principle, namely, delta Zn is h/N (N is 0,1,2, 3). According to the law of reflection, the following geometric relationship is obtained:
Zn+1=Zn-ΔZn------------------------(4)
xn+1=xn-Δxn------------------------(5);
the initial correspondence is as follows:
z0=h
the coordinates of a plurality of points can be calculated, connected by smooth curves and rotated, and the reflector required by the optical design can be obtained;
(2) fresnel lens design
Splitting an incident ray into two components, wherein one component perpendicular to an incident plane is called an S component, and the other component is called a P component in the incident plane;
for the component S
Wherein,
by boundary conditions of electromagnetic fields
To obtain
ω1=ω1′=ω2cosi1y′=0,cosi2y=0;
I.e. to obtain the incident light, the reflected light and the refracted light will be in the same plane, and:
k1sin i1=k1sin i1′=k2sin i2
i1=i1′
n1sini1=n2sini2;
that is, fresnel gives the relationship of the amplitudes of the incident, reflected and refracted waves at the interface in the S component:
the position relation of the S component and the P component satisfies the right-handed spiral law, namely the amplitude relation of the P component can be calculated in sequence. At the moment, the calculated S component and the calculated P component are superposed through a superposition principle, and then a first adjustable free-form surface of the Fresnel lens can be obtained;
(3) fly's eye lens design
The light rays are refracted twice by the incident spherical surface and the emergent spherical surface to realize the required directional trend of the light rays;
regarding the LED light source as a point light source, when light is refracted by the bead surface, the light vector emitted by the refraction point is I:
the exit angle of the light source is phi 1, and the incident angle and the exit angle on the spherical surface are alpha 1 and alpha 2 respectively, namely
φ1=φ1-α1+α2;
Under the condition that theta is the same, the relationship between the surface parameters of the free-form surface and phi 1, alpha 1 and alpha 2 is as follows:
when the target surface is uniformly illuminated, since the LED emits light in a lambertian manner and is rotationally symmetric, that is:
I[I (φ)]=I×cosφ
wherein X and Y are coordinate values of the vertex in the first quadrant, and phi is determined, namely the value of theta in the first quadrant is determined;
the position coordinates of the refraction point can be obtained, the position coordinates of other points can be obtained in the same way, and the position coordinates are connected by a smooth curve to form a second free-form surface on the required fly-eye lens;
(4) and assembling the same
The reflecting cup is connected with the PCB, the LED substrate is arranged in the reflector and connected with the Fresnel lens, the fly-eye lens is connected with the top of the reflector, and the PCB is arranged in the shell to finish assembly.
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CN107606502A (en) * | 2017-09-21 | 2018-01-19 | 广东欧曼科技股份有限公司 | A kind of efficiently collimation matches somebody with somebody optical assembly |
CN115218140A (en) * | 2022-08-12 | 2022-10-21 | 中国商用飞机有限责任公司 | Optical system for multi-mode combined dimming and method for adjusting illuminance of optical system |
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