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Reflector cup & lens

What is the reflective cup, what is the lens, the problem in a long time ago also confused me, I believe that many people like me before, that reflective cups are actually different with the lens, but the structure is not the same, with the same or , So there are not many people to get to the problem.
As we all know, reflective cups and lenses are secondary optical devices, the role of the light is the second light distribution, they can be said that the light of the core of the luminous efficiency, if there is no such use of the core, the lighting market is about to return to the original Of the stage, everywhere are fluorescent tubes, since the use of speaking up, then let us first understand the difference between the reflective cup and the lens.
Reflective cups
Do the lamp should know the original LED light angle of 120 ° or so, in order to achieve the use of light to achieve the desired effect, the lamp will use the reflector to control the light distance, area, spot effect, and the reflector is usually The form of the cup appears, and for this form the reflector industry is collectively referred to as the reflector cup.
Reflective cup itself is divided into two categories:
Metal reflective cup: generally aluminum, need to stamping, polishing, oxidation and other processes to complete, its easy molding, low cost, high temperature, easy to be recognized by the industry.
Plastic reflective cup: the need to complete the demoulding, the optical accuracy is high, no deformation memory, the cost relative to the metal is relatively high, but its temperature effect is not a good metal cup, for high temperature lamps, far away Device.
Also worth mentioning is that the light from the light to the cup out of the light, not all of the light will be refraction and then out, this part has not been reflected out of the light, in optical collectively referred to as the secondary spot (as shown below), vice The existence of the spot has a team of visual relaxation.
♦ Reflective cup with its spot effect
♦ How does the reflector work and how it works?
Reflective lens has a classification, the lens also has a classification, LED lens is divided into a lens and secondary lens, we generally say that the lens is the default for the secondary lens, also said that the LED light source, and its close combination. Depending on the requirements, different lenses can be used to achieve the desired optical effect.
LED lens in the market mainly for the material PMMA (polymethyl methacrylate), PC (polycarbonate) two, which PMMA transmittance of 93%, while the PC is only about 88%, but the latter resistance Temperature is higher, the melting point of 135 °, and PMMA only 90 °, so these two materials is almost half of the advantages of the lens market.
Now the secondary lens on the market is generally the total reflection design (TIR), the lens design in the front through the condenser, and the cone surface can be all the side of the light collected and reflected, when the two light is overlapping Up after use, you can get a perfect spot effect. TIR lens efficiency is generally more than 90%, the general beam angle <60 °, can be applied to a small angle above the lamp.
♦ How the lens works and how it works
Topic here, there will certainly be friends will ask, then when to use the lens, when to use reflective cup?
Read the front of the students know that the reflective cup has a deputy spot, it can provide an excessive, so that some of the more comfortable, but it is not the same thing, let us first look at a group of plans.
Lens light effect
Reflective cup light effect
Lens out of the effect is relatively perfect, generally no sub-spot the existence of light-like relatively beautiful; and reflective cup out of the effect, with a sub-spot, light-shaped layered effect. Believe that the normal aesthetic of a friend will feel the effect of the map is more suitable to show the art of hanging paintings, and have a sub-spot under the map is a bit unsatisfactory, and even can be said to look awkward, but this means that there is a sub-spot reflective Is the cup useless? That is not, immediately look at the next figure.
For a scene, is still a reflective cup, is still a secondary spot, but when the deputy spot effect is completely highlighted when, in fact, its aesthetic relative to the previous, is not a grade at all, so in the end is the choice of lens or Reflective cups as a secondary light distribution device this problem, almost with the so-called asked her boyfriend and his girlfriend out of the water, in the end the first to save the eternal problems par.
The same is also a problem with the cart before the horse, first of all for the developers, you want to find out where your needs, where there is any prerequisite, need to achieve what kind of light effect. And then is the process of further implementation and implementation of the program.
Or that sentence, to achieve the effect is what you need the same is that you think the best optical components, they are not good or bad points.
The next is for everyone to do the next reflective cup with the lens for the recommended lamp (no optical requirements).
1, downlight (wall lamp)
Like the lamp class of lamps, usually installed in the corridor of the wall, but also from the eyes of one of the nearest light, if the light of the lamp is relatively strong, it is easy to show a psychological and physical not suited, so the lamp Class design, in the absence of special requirements, the general use of the effect of the reflective cup relative to the lens will be better, after all, there is a sub-spot over, will not let people walk in the corridor will feel because a light intensity is too strong Eyes are uncomfortable.
2, cast light (spotlights)
Cast light is generally to illuminate a certain thing, it needs a certain range and light intensity, more importantly, it needs to illuminate the real show clearly in the human field of vision, so like this to the main lighting, And away from the eyes of the people, generally do not have discomfort to the people of the lamp, the design, the use of the lens will be better than the reflective cup, if it is to do a single light source, the use of pinch Phil lens better, after all The range is not comparable to the general optical element.
3, wall washer
Wall washer, the general use of the wall in the light, and its internal light source more, if the use of secondary light spot strong reflective cup, it is easy to cause people do not adapt, so similar to the wall lights such as lamps, The lens is better than the reflector.
4, mining lamps
This is really more difficult to choose the product, first of all to understand the application of industrial and mining sites, factories, highway toll stations, large shopping malls and other large areas of space wide area, and this area is a lot of factors can not control, such as height, The width is very easy to interfere with the application of the lamp, then how to choose a lamp or reflective cup?
In fact, the best way is to determine the height, the installation of a relatively high at the end, closer to the eyes of the place, recommend the use of reflective cups, the installation of a relatively high height, recommended the use of lenses. Reason without him, the end of the distance because of the eyes too close to the need for an excessive, high distance with the eyes too far, need a range.

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