A thin layer of material that, when applied to a lens, increases its transmittance and reduces its reflectance.
                                                            
                                                     
                        
                                                
                        
                        
                            A thin coating of a material, which reduces the light reflection and increases light transmission, applied to a photovoltaic cell surface.
                                                            
                                                     
                        
                                                
                        
                        
                            Dielectric thin film coating applied to an optical material to increase the transmittance by reducing the surface reflectance.