We also talked about filter accessories, which are also lens accessories. But the main function is still light filtering. Today we still introduce lens accessories, but today's lenses are very different from those of filter lenses!
We know that in the exhibition lighting, because the exhibits are different, the requirements for lighting also need to be designed specifically; In application, various accessories are needed to achieve the desired effect in design.
Today, I will come to know the lens in the lamp accessories.
Pull lens
We know that the light spot of lamps is usually round, but the exhibits have different shapes, some of which are long but narrow in width. Then, if you use a round light spot at this time, you will see a small light object. In this way, it will reduce the aggregation of light on the exhibits, and it will be extremely uncomfortable visually. In this case, the pulling lens can be used to control the light pattern.
Light pulling lens is used to lengthen the round light spot into an ellipse. In this way, for some longer exhibits, the light spot will better adapt to the size of the exhibits, rather than the round light spot, which increases the beam angle to take into account the size of the exhibits. Very inappropriate lighting.
Of course, it is not necessary to use pull lenses in all such cases. If the exhibits are vertical banners and the banners are not very long, it is not necessary to use pull lenses. Because of this kind of situation, you can solve it by adjusting the tilt angle of the light.
It is also convenient to install the pull lens, which is installed in the interior fittings of the lamp, usually in the front frame of the lamp. The shape of the lamp will not be affected in use. The price of the pull lens is not high, but the function is very suitable for solving the appeal problem. It is a component used more in the light distribution of lamps.
However, there are several points to be noted in the use of pull lenses:
First, after the lamp uses the pull lens, if the irradiation distance is relatively close, the edge of the light spot will not be soft. In severe cases, obvious signs will appear. When such problems occur, the lens can be installed inside as much as possible, which can reduce such problems. Anti dazzle accessories can also be used to cut off the light at the edge to solve this problem.
Second, the glare will be aggravated after the lenses are added. Such problems can also be solved by using anti glare accessories.
Soft lens
In lighting applications, many lamps will be used. Generally, the spot adjustment of lamps will not have any deviation, but there are always a few of them that are independent, and their spots will be relatively stiff, excessive and unnatural, giving a poor impression. Or another situation: due to the difference in the materials of the exhibits, the reflection of light is relatively strong, which will cause discomfort when watching. Then, in these two cases, you can use soft light accessories to solve the problem.
Softening lenses, as the name implies, are used to soften light spots. After the installation of lamps, the problems such as excessive, unnatural and hard light spots can be solved. It is also easy to install, and it is installed in the front frame of the lamp, which will not affect the shape of the lamp. There are two types of soft light lenses: cloth glass and fog glass. Fabric glass achieves soft light effect through the grid on the glass surface; Fog glass softens light spots through the frosted surface of the surface. The effect of fogged glass will be better, but the light loss will be greater.
In the early days, other non LED light source lamps were mostly made of glass because of their high temperature; Now, after the popularization of LED light source, due to the low temperature, many materials of lenses have been derived. Now the common materials are mostly acrylic or glass. The corresponding functions are now more perfect and the price is relatively low.
Soft light lenses also have several characteristics:
First, the larger the beam angle is, the lower the light output rate is. The larger the beam is, the greater the light loss is.
Second, it will also aggravate glare. Of course, it can also be solved through glare accessories.
In addition to filter lenses, other light distribution lenses are commonly used. Understand the characteristics of various accessories, so that you can handle the light distribution more easily.