What is LED lens and specification classification

The effect of the LED lens is better than that of the lampshade, because it needs to shoot far! The lampshade condensing light has passed the lens (because the LED itself must have a lens) and then passes through the light cover to condense the light again, this time will waste a lot of light, it is better to use the lens The light is concentrated, and the light-emitting angle of the lens is well handled. The following editor will introduce to you what is the LED lens and the content of the specification classification, welcome to read!

What is an LED lens:

LED lenses are made according to the law of refraction of light. A lens is an optical element made of transparent substances (such as glass, crystal, etc.). The lens is a refractor whose refraction surface is a transparent body with two spherical surfaces (part of the spherical surface), or a spherical surface (part of the spherical surface) and a plane. It has both real and virtual images. Lenses can generally be divided into two categories: convex lenses and concave lenses. The central part thicker than the edge part is called a convex lens, and there are three types of biconvex, plano-convex, and concave;

The LED lens is generally a silicone lens, because the silicone has high temperature resistance (and can also be reflowed), so it is often directly packaged on the LED chip. Generally, the size of the silicone lens is small, with a diameter of 3-10mm. And the LED lens is generally closely related to the LED, which helps to improve the light output efficiency of the LED and the optical system that the lens changes the light field distribution of the LED.

The LED lens is an optical system that is closely related to the LED and helps to improve the light extraction efficiency of the LED and change the light field distribution of the LED. High-power LED lens/reflector is mainly used for concentrating and guiding light of high-power LED cold light source series products. The high-power LED lens designs the light distribution curve according to the angle of the different LED outgoing light. By increasing the optical reflection, the light loss is reduced and the light efficiency is improved (the aspherical optical lens is set).

Specification classification of LED lens:

1. Transmissive (convex lens)

• When the LED light passes through a curved surface of the lens (a double convex has a curved surface), the light will be refracted and concentrated, and the angle will also change when the distance between the lens and the LED is adjusted (the angle is inversely proportional to the distance). After optical design The light spot of the LED will be very uniform, but due to the limitation of the lens diameter and the lens mode, the light utilization rate of the LED is not high and the edge of the light spot has a relatively obvious yellow edge;
• Generally used in large-angle (above 50°) spotlights, such as table lamps, bar lamps and other indoor lighting;

2. Catadioptric type (cone type or cup type)

• The design of the lens uses a penetrating concentrator in the front, and the conical surface can collect and reflect all the side light, and the overlap of these two kinds of light (the same angle) can get the most perfect light utilization and beautiful light. spot effect;
• Some changes can also be made on the surface of the conical lens, which can be designed into mirror surface, frosted surface, bead surface, striped surface, thread surface, convex or concave surface, etc. to obtain different spot effects.

3. Lens module

• Multiple single lenses are injected to complete an integral multi-lens lens, which can be designed into 3-in-1, 5-in-1 or even dozens of lens modules according to different needs; two separate lenses can also be combined through a bracket together.
• This design effectively saves production costs, achieves consistent product quality, saves space for lighting mechanisms, and makes it easier to achieve "high power" characteristics.