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Measure the quality of automotive lighting technology indicators (Figure)
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http://www.wphidled.com/
Sales Manager : Amy Feng
MSN : Amy@wplamps.com Email : Amy@wplamps.com
Alibaba: cn220020193 Phone: 0086-13126403867
a common fixture on the market, basically divided into two groups, occupy the low domestic price of light, imported lamps have become synonymous with burning package. The quality of domestically produced and imported lighting fixtures between the quality differences, mainly in the following three aspects
1, light type of accuracy. Bowl made of light reflection, the majority is not obtained by the shape of computer-aided design, but by turning the mode mode directly from the molded product piracy, and for more details of things, very few manufacturers really go in depth. For light fixtures for a final bowl of light-based design depends not only on reflection, but also part of the lens (the transparent front headlight glass or polyester cover.) Both the appearance of this imitation is fully carried out can be done, but to talk about the refractive index lenses and halogen filament Non-point-like light source, light type of accuracy is difficult to be simply copied.
We know that the refractive index of light passing through the lens of the light direction; and lens and the distance between the reflector bowls, but also directly affects the accuracy of the direction of outgoing light. The latter easily replicated, but depends on the refractive index of the lens material itself, this is not the analysis of precision instruments, it is difficult to achieve full replication.
Furthermore, we are now commonly used for light source - halogen lamp, it itself is not an ideal point source. We all know, there is a certain length of filament, and will never be the use of simple common sense to handle this high school physics catadioptric light. If high school physics knowledge can directly use it, we own to buy a spherical glass shell, cut in half, the inner surface coated with reflective film, the lights installed in the center of the sphere position, can use as a spotlight the.
To accurately control the final non-point-like source of light type, must rely on the professional design software, from software point of the filament by optical calculation, look at the impact point at the filament light emitted light in different positions of the point stack to be able to get the final optical design (which is why many people found the installation of HID light type of divergent reasons, HID and halogen light-emitting points can not fully overlap, usually it is a curved line, similar to lightning the same). Even when you use a non-standard specifications produced by the light bulb, will result in the final design of the output beam type and the deviation between the light pattern. A good lighting, and you will type in their design of light flux is overwhelming, and only a few luminous flux falls outside the design area.
2, heat reflective coating bowl capacity and antioxidant capacity. Reflection coating the bowl, the issue of their advantages and disadvantages, the most intuitive feeling is the size of reflectivity. Usually we buy a new lamp can achieve a good reflection effect, only in some very poor quality of light reflection coating the surface of the bowl can find a lot of bubbles, impurities, processes and other quality problems intuitively. Usually normal quality products will never let you see them on, because this situation in general in terms of quality control system is defective products. However, let us distinguish between genuine high quality products and vice plant products where it is the intrinsic quality of reflective film.
Modern coating technology in order to save production costs, and increase the efficiency of reflection, usually aluminum, and aluminum itself is very easy because the long-term exposure to air and is oxidized to form a non-reflective aluminum layer; the same time be able to make and reflection coating solid metal base fitting bowl, usually to do with the basis of polymer materials. Polymer materials by UV irradiation, rapidly aging, resulting in reflection bowl bleaching. But this does not mean the reflection of our current solar radiation causes the bowl will be the aging of polymeric materials for UV that point is just drizzle, really make rapid aging of the ultraviolet radiation source, just that we let the light fixtures to provide lighting - light bulb. We are not using a single wavelength of light, its wavelength is continuous, but our eyes can not see infrared and ultraviolet region of light only, many manufacturers have specified the production of light: UVcut.
Another inherent quality of the performance of coating in its high temperature performance (of course this is also related to thermal design lamp itself).
We use the halogen lamp is emitting hot filament in the normal operating temperature of 2000 degrees Celsius, in the light of the confined space, such a heat lamp in the air can be heated to 150 degrees Celsius, and continuous light in the infrared part, need to be reflective coating (reflectivity is not 100%), heat conduction, convection, radiation heat transfer model of three to the coating is heated in a long time of continuous heating will make Li Gui and Li Kui Xianchuyuanxing . I used home-made fog product, not a product after 10 hours of night driving, let your reflection coating to keep the bowl in his basement, and attached to a solid, the mere presence of a small area of blistering, are be of good quality product.
3, the lens impact resistance, light transmittance and resistance to sudden changes in temperature capability. The so-called lens is the light mask in front of the transparent cover, usually two types of materials: glass and polyester. Polyester products is its greatest strength impact resistance, gravel road surface is rolled before the tires collapse of broken glass stones shade and windscreen, I am afraid many people heartache car journey, and polyester products meet this happens, usually only leaving a small white Ma, or there is some very fine cracks Road lines, without affecting the use of the lights.
In addition, sudden changes in temperature-resistant polyester capacity, but also glass materials can not match, after all, is much higher than the brittle glass, polyester, when we come a rain and fog lights on Cross the road, if the glass quality, but off so, a simple wet towel to wipe on the light side, will give you endless journey back trouble, because at this time is a few light surface will burst. Transmittance lasting stability in terms of glass is better than polyester materials, polyester materials, if the quality of customs, however, will be in a very short period of time of aging (six months to one year), this time accompanied by the lens and the color yellow bleaching, while the glass is free from the impact of ultraviolet radiation and other external conditions continue to maintain its initial transparency. Also pay attention to the students light ray type to note, is not the same size lens glass and polyester can be directly replaced, because even with the two patterns are exactly the same as the difference between the two materials will cause the refractive index of light-type changes.
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