1. Focusing Effect:
LEDs emit relatively diffuse light. A lens can focus the light in a specific direction, increasing its intensity and concentration.
Suitable for applications requiring long-distance illumination, such as car headlights and flashlights.
2. Diffusion Effect:
In applications requiring large-area uniform illumination, such as indoor lighting and billboard lighting, a lens can disperse the light, resulting in a more even distribution and preventing areas from being too bright or too dark.
3. Protective Effect:
Lenses prevent dust, moisture, and other impurities from entering the LED, reducing mechanical shock and thermal stress on the LED chip.
Extends the LED's lifespan and improves reliability.
