| zzonbi |
They're already used in newer 3LCD commercial projectors. They increase brightness and reduce the grille effect. I understood their optical axes are parallel. But to replace a field Fresnel each microlens must be aimed to a common point, in a converging cone. And if that is manageable, why not point each microlens the opposite, in a diverging pattern. Then you'd have the ultimate projector, just an ordinary LCD monitor with a foil over it, no other lenses or light sources whatsoever.
In reality such cheap optical foil lenses, the Fresnels being an example, lack the necessary precision, at least for now. The manufacturing process needs elaboration. |
|
|
