Homemade Fresnel Lens

Functions

Fresnel lenses perform beam collimation and focusing:

1. Convert point sources into parallel light, significantly enhancing edge brightness of display panels while eliminating sunspot effects and improving overall brightness uniformity

2. Typically used with other optical components (e.g. cylindrical lenses)

3. Removing collimation lenses causes substantial light loss through panels, resulting in noticeable hotspots and reduced edge brightness

4. On the reverse side of LCD screens, light must be converged from panels to projection lenses

Application Examples

• Portable Projectors: Ultra-thin Fresnel lenses enable compact optical engines as small as the palm of your hand.
• Rear-Projection TVs: Large-format Fresnel screens are used for light diffusion and viewing angle control.
• 3LCD/DLP Projection Technology: Both rely on Fresnel lenses as key optical components for light collimation and concentration.