Optical film and autostereoscopic 3D display using the same

An optical film for generating autostereoscopic 3D images, comprising:

• a concave lens layer having a plurality of concaves and a presumed refractive index;
• and
• a birefringence layer overlapping the concave lens layer, wherein the birefringence layer includes a plurality of liquid crystal units filled, rubbed, and cured in the concaves;
• wherein the birefringence layer has a short axis refractive index, the presumed refractive index is between 100.1%-102.8% of the short axis refractive index;
• wherein the composition of the concave lens layer includes:
• a monomer combination, wherein the weight percent of the monomer combination based on the total weight of the concave lens layer is between 30 wt % and 80 wt %;
• a photo initiator, wherein the weight percent of the photo initiator based on the total weight of the concave lens layer is between 0.5 wt % and 20 wt %;
• and
• a polyester acrylate, wherein the weight percent of the polyester acrylate based on the total weight of the concave lens layer is between 5 wt % and 50 wt %, wherein the solution type refractive index of the polyester acrylate is between 80%-120% of the short axis refractive index.