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Views: Date2009/6/8

1, LED lens types of materials:
1.1 Silicone lens;
a. because of the high temperature silicone (also can lead reflow), so commonly used in the LED chip package directly;
b. General silicone lens smaller in diameter 3 ~ 10mm;
1.2, PMMA lens
a. optical grade PMMA (polymethyl methacrylate, commonly known as: Acrylic)
b. Plastic materials
 Advantages: high efficiency (can be done by injection); transmission rate (3mm thickness, transmittance of 93%)
 Disadvantages: temperature, 70% (heat distortion temperature of 90 degrees, in line with PMMA can withstand temperature range, the use of PMMA lens often have to consider increasing the distance between light and shade, or reduce the light output power);
1.3, PC lens
a. optical grade nylon Polycarbonate (referred to as PC) Polycarbonate
b. Plastic materials
 Advantages: high efficiency (can be done by injection); high temperature (130 degrees)
 Disadvantages: slightly lower transmittance (87%);
1.4, glass lens
  Optical glass materials,
Advantages: high transmittance (97%), high temperature characteristics,
Disadvantages: fragile, difficult to achieve accuracy of non-spherical, low productivity and high cost
2, LED lens, the application of classification
2.1, a Lens
a, a lens is a direct package (or bonding) in the LED chip stand, with the LED as a whole;
b, LED chip (chip) according to the theoretical light is 360 degrees, but in fact placed on the LED chip to be fixed and the packaged bracket, so the chip is 180 degrees maximum angle of light, while the chip will be some stray light, so by a lens chip can effectively collect all the light can be like 160 degrees, 140 degrees, 120 degrees, 90 degrees and 60 degrees (different needs) of the light angle;
c, a multi-purpose lens, PMMA, or silicone materials.
2.2, the second lens
a, the second lens and LED are two separate objects, but they are inextricably linked in the application of Shique;
b, the function of the second lens is a wide-angle LED light (generally 90 to 120 degrees) into a re-condenser 5 degrees to 80 degrees any angle you want to be;
c, most of the second lens with PMMA or glass material
3, LED Lens Size Category
3.1, transmission (convex lens, a single convex lens convex radius of curvature calculated by the following companies:
1/R1-1/R2 = 1 / F (N1-1)
Where F - focal length
     R1, R2 - respectively, the surface of the lens radius of curvature of the two
     N1 - the refractive index of lens material. When the surface is flat, the curvature radius of infinity)
a, when the LED light through the lens of a surface (there are two double convex surfaces) occurs when the refracted light condenser, and when to adjust the distance between the lens and the LED will change when the angle (inversely), through non-spherical Technology designed to spot will be very uniform surface, but because the limitations of the lens diameter, lens not use the light side (leaked);
b, general application in the wide-angle (40 ~ 80 degrees) condenser, such as lamps, streetlights,
3.2, the total reflection type (called the cup or cone)
a, lens design with Chuantou Shi in front of the condenser, while the tapered noodles proved Quanbu can be collected and reflected off the side light, which is the superposition of two light (angle the same) can be the most perfect light Li Yong and beautiful spot effect;
b, can also make some changes in the conical surface of the lens can be designed to mirror, matte surface, bead face, striped face, screw face, convex or concave, etc., get a different spot effects.
3.3, LED Lens Module
a, is the number of single lens by injection to complete a whole long lens can be designed according to different needs of 3 in 1,5 in 1, or even dozens of one of the lens module;
b, this design effectively saving production costs, product quality and consistency, saving lamps institutional space, easier to achieve "power" and so on
4, optical loss
4.1, there are lamp shell, the actual lens of the lamp the luminous flux of light to meet the requirements of the standard distribution, but also need to consider the case, lens transmittance, spill light loss and other factors. In order to better optics and reasonable design of lighting should be divided into rectangular small housing units, the purpose of doing so is to break the light of the wave surface, so that the products have a uniform appearance
4.2, using two-way form the lens surface curvature, according to design requirements to allocate more free light output, more efficient use of flux, to reduce unnecessary waste and glare
4.3, we choose to put in the lens focus light inside, the light source farther away from the lens, lens collected light flux less, and thus lower the efficiency of the lens system, a single convex lens according to the formula
R = (NL-1) F
Where R - radius of convex curvature
     NL - refractive index of lens material
     F - focal length
Lens materials in selected cases, the focal length the greater the larger the radius of curvature. in the same condition lens aperture, the larger radius of curvature, the thinner the lens. The thicker the lens, aberrations will be more obvious, and thus affect the results. Therefore, as a large focal length lens choice, while the focal length increases, the optical system size will increase, therefore, the lens focal length is also not blindly pursue the most. As the thickness of the lens is not great, so there is no use of Fresnel lens, to avoid the cumbersome process and increase costs.

ӧ֧էڧէߧ ݧڧߧ٧

ӧ֧էڧէߧ ݧڧߧ٧ ڧ ާѧ֧ڧѧݧ:
1 ڧݧڧܧߧӧ ݧڧߧ;
() ӧ٧ ӧܧ ۧڧӧ ڧݧڧܧߧӧ ֧ާ֧ѧ (ѧۧܧ), ާ ҧߧ ڧݧ٧֧ ާ ڧߧܧѧݧڧ֧ ӧ֧էڧէߧ ڧ;
() ҧڧ ڧݧڧܧߧӧ ݧڧߧ٧, ֧ ާ֧ߧ էڧѧާ֧ 3 ~ 10 ާ;
2, PMMA ݧڧߧ٧
() ڧ֧ܧԧ ܧѧ֧ӧ (ݧڧާ֧ڧݧާ֧ѧܧڧݧѧ, ڧܧ ڧ٧ӧ֧ߧ ܧѧ: ѧܧڧ)
() ݧѧڧܧӧ ާѧ֧ڧѧݧߧ ֧ڧާ֧: ӧܧѧ ֧ܧڧӧߧ (֧֧ ڧߧ֧ܧڧ), ӧܧѧ ٧ѧߧ (3 ާ ݧڧߧ ܧѧߧڧ 93%) ڧߧ: ֧ާ֧ѧ 70% (֧ݧӧ է֧ާѧڧ ֧ާ֧ѧ 90 ԧѧէ, ֧ݧ էӧݧ֧ӧ֧ߧڧ ӧէ֧اڧӧѧ֧ ڧѧѧ٧ ֧ާ֧ѧ, ڧݧ٧ӧѧߧڧ֧ ֧ߧ ѧ ݧ֧է֧ ڧѧ ӧ֧ݧڧ֧ߧڧ ѧߧڧ ӧ֧ ֧ߧ, ڧݧ ާ֧ߧڧ ӧ֧ӧ ާߧ);
3, PC ݧڧߧ٧
ڧܧ-ܧݧѧ ߧ֧ۧݧߧ ݧڧܧѧҧߧѧ (ڧާ֧ߧ֧ާ PC) ݧڧܧѧҧߧѧ
() ݧѧڧܧӧ ާѧ֧ڧѧݧߧ ֧ڧާ֧: ӧܧѧ ڧ٧ӧէڧ֧ݧߧ ( ӧڧէ ڧߧ֧ܧڧ), ӧܧ ֧ާ֧ѧ (130 ԧѧէ) ֧էѧܧ: ߧڧا ܧѧߧڧ ӧ֧ (87%);
4 ֧ܧݧߧߧ ݧڧߧ٧ ڧ ڧ֧ܧԧ ֧ܧݧ ާѧ֧ڧѧݧ, ֧ڧާ֧ӧ: ӧܧѧ ٧ѧߧ (97%), ֧ާ֧ѧߧ ѧѧܧ֧ڧڧܧ, ֧էѧܧ: ܧڧ, ѧ֧ڧ֧ܧڧ ߧ ߧ ѧ ݧ֧ԧܧ էڧ, ߧڧ٧ܧѧ ڧ٧ӧէڧ֧ݧߧ է, ӧܧѧ ڧާ

-ӧ, ӧ֧էڧէߧ ݧڧߧ٧ ڧާ֧ߧ֧ߧڧ ܧݧѧڧڧܧѧڧ
1, ֧ӧ ҧ֧ܧڧ
֧ӧ ҧ֧ܧڧ ߧ֧֧էӧ֧ߧߧ ڧߧܧѧݧڧ֧ (ڧݧ ӧ٧) ܧҧܧ ӧ֧էڧէߧ ڧ ӧ֧էڧէߧ ֧ݧ;
, ӧ֧էڧէߧ ڧ (ڧ), ԧݧѧߧ ֧ڧ ݧާڧߧ֧֧ߧڧ ѧӧݧ֧ 360 ԧѧէ, ߧ ߧ ѧާ է֧ݧ ڧ ާ֧֧ ӧ֧էڧէߧ ܧߧ֧ۧ էݧاߧ ҧ ѧߧӧݧ֧ߧ ѧܧӧܧ, ڧ ԧ ڧ٧ݧѧڧ ߧ 180 ԧѧէ, էԧ ڧ ҧէ֧ ߧ֧ܧݧܧ ѧ֧ߧߧ ӧ֧, ާ, ӧ֧ԧ ӧ֧ ҧ֧ܧڧ ާا֧ ֧ܧڧӧߧ ҧڧѧ ڧ ާا֧ ҧ ݧ֧ߧ, ߧѧڧާ֧, 160 ԧѧէ, 140 ԧѧէ, 120 ԧѧէ, 90 ԧѧէ ڧݧ 60 ԧѧէ (ѧ٧ݧڧߧ ֧ҧߧ) ԧ ӧ֧;
, ҧ֧ܧڧ ҧݧ֧ ֧ PMMA ڧݧ ڧݧڧܧߧӧ ާѧ֧ڧѧݧ.
2, ӧ ݧڧߧ٧
ѧ ݧڧߧ٧ ӧ֧էڧէߧѧ էӧ է֧ݧߧ ҧ֧ܧ, ߧ ߧ ߧ֧ѧ٧ӧߧ ӧ٧ѧߧ ާ֧اէ ҧ ڧާ֧ߧ֧ߧڧ Shique;
, ӧ ҧ֧ܧڧ ҧݧѧէѧ֧ ڧܧڧ ԧݧ ӧ֧էڧէߧ (ҧߧ 90 է 120 ԧѧէ) ߧӧ ֧էڧ ԧݧ 5 ԧѧէ է 80 ԧѧէ ݧҧ ڧ ݧڧ;
, ӧ ҧݧ ѧ ާѧ֧ڧѧݧ ݧڧߧ٧ ڧݧ ֧ܧݧߧߧ

-֧ڧ, ӧ֧էڧէߧ ѧѧܧ֧ڧڧܧ ҧ֧ܧڧӧ
֧֧էѧ (ݧڧߧ٧, էߧ ӧܧݧѧ ݧڧߧ٧ ѧէڧ ܧڧӧڧ٧ߧ ѧڧӧѧ֧ ݧ֧էڧާ ܧާѧߧڧާ:
   1/R1-1/R2 = 1 / F (N1-1)
     F - ܧߧ ѧߧڧ ҧ֧ܧڧӧ
    R1, R2, - ӧ֧ӧ֧ߧߧ, ѧէڧ ܧڧӧڧ٧ߧ ӧ֧ߧ ݧڧߧ٧ ڧ
    N1 - ܧѧ٧ѧ֧ݧ ֧ݧާݧ֧ߧڧ ާѧ֧ڧѧݧ ݧڧߧ٧. ԧէ ӧ֧ߧ ݧܧѧ, ѧէڧ ܧڧӧڧ٧ߧ ҧ֧ܧߧ֧ߧ)
, ܧԧէ ӧ֧էڧէߧ ӧ֧ ֧֧ ҧ֧ܧڧ ӧ֧ߧ (էӧۧߧ ӧܧݧ ӧ֧ߧ) ֧ݧާݧ֧ߧڧ ӧ֧ ӧ֧ާ ܧѧ ܧߧէ֧ߧѧ, ԧ ڧ٧ާ֧ߧڧ, ܧԧէ ѧߧڧ ާ֧اէ ֧ԧݧڧӧܧ ݧڧߧ LED (ҧѧߧ ڧߧѧݧߧ), ݧ ߧ֧֧ڧ֧ܧ ڧ٧ѧۧ ӧ֧ߧ ߧ ҧէ֧ ֧ߧ ѧӧߧާ֧ߧ, ߧ ڧ-٧ ԧѧߧڧ֧ߧڧ ҧ֧ܧڧӧ էڧѧާ֧ ҧ֧ܧڧӧ ߧ ӧ֧ ߧ ާا֧ ڧݧ٧ӧѧ (֧ܧ);
, ҧ֧ ڧާ֧ߧ֧ߧڧ ڧܧԧݧߧԧ ( 40 է 80 ԧѧէ), ܧߧէ֧ߧѧ, ѧܧڧ ܧѧ ݧѧާ, ݧڧߧ ߧѧ,
2, ݧߧ ӧߧ֧ߧߧ֧ ѧا֧ߧڧ (ܧߧڧ֧ܧڧ ڧݧ ߧѧ٧ӧѧ ѧܧ)
ܧߧܧڧ ҧ֧ܧڧӧ ֧֧էѧ֧ ܧߧէ֧ߧѧ ֧֧ ܧߧڧ֧ܧ ӧ֧ߧ ާا֧ ҧ ܧѧ ԧڧ ӧ ҧѧߧ ѧاѧ֧ , ߧ ߧѧݧا֧ߧڧ էӧ ݧ֧ԧܧڧ (ԧ ا) ӧ ާا֧ ݧڧ ѧާ ӧ֧֧ߧߧ ڧݧ٧ӧѧߧڧ ӧ֧ ܧѧڧӧ ާ֧;
ާاߧ ѧܧا է֧ݧѧ ܧߧڧ֧ܧ ڧ٧ާ֧ߧ֧ߧڧ ӧ֧ߧ ݧڧߧ٧, ާԧ ҧ ѧ٧ѧҧѧߧ ٧֧ܧѧݧ, ާѧӧѧ ӧ֧ߧ, ӧ֧ߧ ӧ, ݧѧ ݧڧ, ӧڧߧ ݧڧ, ӧܧݧ ڧݧ ӧԧߧ .., ҧ ݧڧ ֧ܧ էԧ ާ֧.
3, ӧ֧էڧէߧ ާէݧ ҧ֧ܧڧӧ
, ڧݧ էڧߧߧѧ ݧڧߧ٧ ӧڧէ ڧߧ֧ܧڧ, ҧ ٧ѧӧ֧ڧ ӧ֧ էݧڧߧߧ ҧ֧ܧڧ ާا֧ ҧ ѧ٧ѧҧѧ ӧ֧ӧڧ ѧ٧ݧڧߧާ ֧ҧߧާ 3- 1,5 1 ڧݧ էѧا է֧ܧ էߧ ݧڧߧ٧ ާէݧ;
, ܧߧܧڧ ֧ܧڧӧߧ ܧߧާڧ ٧ѧѧ ߧ ڧ٧ӧէӧ էݧ էڧا֧ߧڧ ӧ֧ӧڧ ܧѧ֧ӧ էܧڧ, ѧܧا ߧ֧ԧҧ֧֧ԧѧڧ ݧѧާ ֧اէ֧ߧڧ ѧߧӧ, ݧ֧ԧ էڧ «ӧݧѧ» . .

-֧ӧ֧, ڧ֧ܧڧ ֧
1, ݧѧާ ߧѧէ, ҧ֧ܧڧ ӧ֧ӧ ݧѧާ էݧ էӧݧ֧ӧ֧ߧڧ ѧܧڧ֧ܧڧ ֧ҧӧѧߧڧ ѧߧէѧ ѧ֧է֧ݧ֧ߧڧ ӧ֧ ѧܧا էݧاߧ ѧާ֧ اڧݧ, ҧ֧ܧڧ ܧѧߧڧ, ֧֧ݧߧ֧ߧڧ ݧ֧ԧܧڧ ѧܧ ֧. ѧ٧ާߧ ڧ֧ܧڧ ֧ܧ ݧ, էڧ٧ѧۧ ݧѧާ ݧ֧է֧ ѧ٧է֧ݧڧ ߧ ާԧݧߧ ҧݧ, ֧ݧ ԧ ӧݧ֧ ѧ٧֧ߧڧ ӧ֧ӧ ӧݧ ӧ֧ߧߧ ӧݧ, ѧ էܧ ڧާ֧ ֧էڧߧ ӧߧ֧ߧڧ ӧڧ
(2) ڧݧ٧ӧѧߧڧ էӧߧߧ֧ ӧ֧ߧ ݧڧߧ٧, ӧ֧ӧ ާا֧ ҧ ҧݧ֧ ӧҧէߧ ѧ֧է֧ݧ ӧ֧ӧڧ ֧ܧߧާ ֧ҧӧѧߧڧާ, ѧܧا ҧݧ֧ ֧ܧڧӧߧԧ ڧݧ٧ӧѧߧڧ ӧ֧ӧԧ ܧ ߧڧا֧ߧڧ ߧ֧ߧاߧԧ ާ ҧݧڧܧ
3, ާ ѧӧڧ ӧ֧ ӧߧ ҧ֧ܧڧӧ ֧էڧ ڧߧڧܧ ӧ֧ էѧݧ ҧ֧ܧڧӧ, ҧ֧ܧڧ ҧѧݧ ӧ֧ӧ , ֧ ާ֧ߧ, , ݧ֧էӧѧ֧ݧߧ, ֧ ߧڧا ֧ܧڧӧߧ ڧ֧ާ ݧڧߧ, ӧ֧ӧڧ ާݧ էߧڧ ҧ֧ܧڧӧ

R = (NL-1) F
է R - ӧܧݧ ѧէڧ ܧڧӧڧ٧ߧ
     NL - ާѧ֧ڧѧ ݧڧߧ٧ ֧ݧާݧ֧ߧڧ
     F - ܧߧ ѧߧڧ ҧ֧ܧڧӧ
ݧѧ ӧҧѧߧߧԧ ާѧ֧ڧѧݧ ݧڧߧ٧, ֧ ҧݧ ܧߧ ѧߧڧ, ֧ ҧݧ ѧէڧ ܧڧӧڧ٧ߧ. ݧӧڧ ا ¢ էڧѧѧԧާ ҧ֧ܧڧӧ, ֧ ҧݧ ѧէڧ ܧڧӧڧ٧ߧ ݧڧߧ٧ ߧ. ӧ֧ާ ܧѧ ݧڧߧ٧ ݧ, ֧ ֧ӧڧէߧ֧ ѧҧ֧ѧڧ, ѧܧڧ ҧѧ٧ ӧݧڧ ߧ ֧٧ݧѧ. ѧܧڧ ҧѧ٧, ߧѧܧݧܧ ӧ٧ާاߧ, ҧݧ ܧߧ ѧߧڧ ҧ֧ܧڧӧ, ӧ֧ݧڧ֧ߧڧ֧ ܧߧԧ ѧߧڧ, ڧ֧ܧڧ ѧ٧ާ֧ ڧ֧ާ ѧܧا ҧէ֧ ѧ, ݧ֧էӧѧ֧ݧߧ, ܧߧ ѧߧڧ ҧ֧ܧڧӧ ߧ ާا֧ ҧ ݧ֧ ԧߧ ٧ ާѧܧڧާާ. ܧݧܧ ݧڧߧ ݧڧߧ٧ ߧ ӧ֧ݧڧ, ߧ ڧݧ٧֧ ݧڧߧ٧ ֧ߧ֧ݧ, ҧ ڧ٧ҧ֧اѧ ӧ֧ݧڧ֧ߧڧ ӧݧܧڧ ڧާ ҧѧҧܧ.