Application of Fresnel lenses in projection systems. The Fresnel lens has been proven to be an important lens in the projection system, and its function is to collimate and focus light. The Fresnel lens adjusts the beam emitted by the light source into parallel light, which significantly improves the brightness in all directions of the display panel and eliminates the sun spot effect, thereby improving the overall display brightness uniformity. Fresnel lenses are generally used together with other display components (such as cylindrical mirrors).
The advantage of using a Fresnel lens in a projection system is that it can increase the brightness of the volumetric display by focusing or adjusting the collimation of the light. If the collimator lens is eliminated, a lot of light will be lost when passing through the panel, and obvious heat will appear in the display. Spot effect, increasing the brightness around the display screen. Similarly, on the other side of the LCD screen, we must also focus the light from the panel into the projection lens.
