Projector curtain

A preparation method for a projection curtain comprising a colored layer, a diffusion layer, a Fresnel lens layer, and a reflective layer sequentially stacked along a thickness direction, or comprising a colored layer, a Fresnel lens layer, and a reflective layer sequentially stacked along a thickness direction, or comprising a diffusion layer, a Fresnel lens layer, and a reflective layer sequentially stacked along a thickness direction, or comprising a Fresnel lens layer, and a reflective layer sequentially stacked along a thickness direction;

• wherein the Fresnel lens layer comprises a plurality of annular protrusions protruding from a plane, the plurality of annular protrusions are arranged in circular bands, and a cross-sectional shape of each annular protrusion along a cross section perpendicular to the plane is a triangular shape or a multi-step shape or a free surface shape;
• wherein the reflective layer is a metal reflective layer or an alloy reflective layer, the metal reflective layer comprises aluminum, silver, gold, chromium, nickel or copper, and the alloy reflective layer comprises nickel-chromium alloy, aluminum alloy or titanium alloy;
• the method comprising:
• bonding any two of the diffusion layer, the colored layer and the Fresnel lens layer through an optical clear adhesive (OCA);
• or
• preparing the diffusion layer and the colored layer by coating, and then bonding the diffusion layer and the colored layer to the Fresnel lens layer through the OCA;
• or
• plating the colored layer on one surface of the diffusion layer, and then bonding the opposite surface of the diffusion layer to the Fresnel lens layer through the OCA;
• or
• plating the colored layer on one surface of the diffusion layer, and then bonding the opposite surface of the colored layer to the Fresnel lens layer through the OCA;
• wherein the Fresnel lens layer is prepared through a roll-to-roll process, and the roll-to-roll process comprising:
• coating an adhesive layer on a substrate, or a film with a certain haze, or the diffusion layer, or the colored layer, and
• performing roll-to-roll stamping on the adhesive layer through a Fresnel lens mold, wherein the Fresnel lens mold used in the stamping has random point structures on a surface thereof prepared through a laser direct writing process,
• wherein the Fresnel lens layer further comprises a substrate layer arranged at a bottom of the plurality of annular protrusions or a film layer with a certain haze;
• wherein a surface of each annular protrusion of the Fresnel lens layer has scattered microstructures;
• and/or
• wherein the reflective layer is prepared by an electroplating, evaporation, sputtering or coating process.