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LED road lamp lens type, specification and Application.
发布者: 发布时间:08/04/16
LED road lens
Preface.
This article focuses on the special for high power LED road lamp lens, the characterized is with high power LED:
一.Road lens materials
1 glass lens
1.1. Because the glass material is with high temperature resistance and high penetration rate, till now, a larger part of LED street lamp factory in the use of it;
1.2. But glass quality is heavy, fragile, high cost, and that its has some limitations
2. PC or PMMA material
2.1. The two kinds of materials are in optical plastic, it can be completed by injection molding, also it is easy realization of aspheric surface condenser, it even reduces the yellow phenomenon;
2.2. The PC and PMMA penetration rate and temperature resistance is lower than glass
2.3 for PC and PMMA, the production costs are cheaper
LED lens specifications
1 angle
1.1. Because different ways have different optical requirements, such as:street lamp pole height, distance between road pole ,road types ( trunk roads, road, branch, garden road ), so the lamp lens angle requirements are not the same;
1.2. Generally, streetlight lens condenser angle requirements: 60 degrees, 80 degrees, 100 degrees, 120 degrees
1.3. General trunk road lamp pole height of 10-12M, street lamp pole distance of 30-35M, the calculated lamp lens angle demand for 100-120 degrees;
2 Facula
2.1 round facula, generally applied to garden area road; the range of irradiation and illumination requirements is not very high;
2.2 oval facula, ( such as steadyled lens model ST-V20H-LT2060) generally applied to motor vehicle or a non-motor vehicle lanes, effectively g effect round beam irradiation, round and round with local sides will have a dark area, the whole road light is not well distributed evenly ,it is a part of the circular light facula the light beyond the road surface ,just no real using;
2.3. The rectangular facula, used in motor vehicles, effective use of LED light, after condensing light uniform distribution on the pavement, facula is average
2.4 street lamp lens relatively requirements is the light Rate of penetration uniformity of the pavement, the illumination values is required, this is a street lamp manufacturers need to the design do considerations ( such as the power size, different brands, different selection of LED LM LED selection )Lens appearance
3.1 single lens
3.1.1. A single street lamp lens used in combination ( LED lens and one on one ), the advantage lies in its flexibility of using;
3.1.2. For example: I can freely choose LED lens quantity to arrange laying out
3.2 street lamp lens module ( bull )
3.2.1. In order to effectively use the lighting space, reducing the size and weight of the structure of the lamp, at present a considerable part manufacturers are first using LED lens module, which based on the 4 * 7 structure
3.2.2 LED lens module can also be matched with the lamp waterproof structure
Reference Information
1.1. Because of environmental protection and energy saving, long service life, small volume and other special, the high-power LED has been widely used in road lighting street lamps;
2.2 At present, LED street lamp for energy saving features by using solar energy as energy directly, and truly realize the environmental protection and energy saving;
3.3.LED road lamp lens demands and the prospect is also good;
4.4. Selection of high transmittance material and develop efficient ( utilization rate of light ) are able to adapt to the harsh outdoor environments, easy to maintain is working direction for manufacturers