Types and specifications of street lamp lens

Street lamp lens glass material

• Because the glass material has the characteristics of high temperature resistance and high penetration rate, it is still used by a large number of LED street lamp factories;
• However, due to the shortage of heavy quality, fragile and high cost, the scope of use of glass has certain limitations;

Street lamp lens PC or PMMA material

• These two materials belong to optical plastics, which can complete product molding through injection molding, which is easy to realize aspherical focusing and reduce the yellow halo phenomenon of light spot;
• However, the penetration rate of PC and PMMA is only second to that of glass, and the temperature resistance is not as good as that of glass materials;
• However, PC and PMMA have significant advantages in terms of materials and production costs;

Street lamp lens angle specification

• Because different roads have different optical requirements, such as the height of street lamps, the distance between street lamp poles, and the types of roads (trunk roads, trunk roads, branches, courtyard communities, etc.), the angle requirements of street lamp lenses are also different;
• Generally speaking, the focusing angle specifications of street lamp lens are: 60 degrees, 80 degrees, 100 degrees and 120 degrees;
• Generally, the height of street lamp poles on main roads is 10-12m, and the distance between street lamp poles is 30-35m. Therefore, it is calculated that the angle requirement of street lamp lens is 100-120 degrees;

Street lamp lens spot specification

• Circular light spot, generally used in courtyard community roads; The irradiation range and illumination requirements are not very high;
• Elliptical light spot (such as Renda photoelectric street lamp lens model st-v20h-lt2060) is generally used in motor vehicles or non motor vehicle lanes, which effectively overcomes the circular light spot irradiation. There will be a dark area on both sides of the place where the circle meets the circle. On the whole road, the light is not evenly distributed, or part of the light of the circular light spot exceeds the road surface and is not really used;
• Rectangular light spot (such as dg-st107 of danyangling Hemei) is applied to the motorway to effectively use the light of LED. The concentrated light is evenly distributed on the road and the light spot is uniform;
• Relatively speaking, the requirements of street lamp lens are light interest rate, focusing angle and light spot uniformity. Whether the illumination value on the road meets the standard is an issue that street lamp manufacturers need to consider in design (such as power, selection of LEDs of different brands, selection of LEDs with different LM values, etc.)

Appearance specification of street lamp lens

Single lens

• It is used in combination with multiple single street lamp lenses (lens and led one-to-one), which has the advantage of its flexibility;
• For example: use as many led lenses as you want, and arrange them as you want;

Street lamp lens module (multi head)

• In order to effectively use the space of lamps and reduce the structural size and weight of lamps, a considerable number of manufacturers first street lamp lens modules, including 28 heads with 4 * 7 structure;
• The street lamp lens module can also cooperate to realize the waterproof structure of the lamp;