Nanometer microcrystal mixed optical structure back projection high-definition image film and back projection screen

The invention discloses a nanometer microcrystal mixed optical structure back projection high-definition image film. The nanometer microcrystal mixed optical structure back projection high-definitionimage film comprises a substrate layer, a nanometer microcrystal and nanometer micro ball mixed imaging coating layer and a back adhesive layer; the nanometer microcrystal and nanometer micro ball mixed imaging coating layer is formed by uniformly coating one surface of the substrate layer with nanometer microcrystal, nanometer micro balls and an adhesive based on a proportion; and the back adhesive layer is arranged on the other surface of the substrate layer for pasting external supports. The nanometer microcrystal and the nanometer micro balls are mixed and coated on the substrate layer, sothat compared with an image film with separated inorganic silicon particle coating layer and glass micro ball coating layer, the image film disclosed in the invention can eliminate projector light source light spots in a more