OPTICAL COVER FOR A LIGHT EMITTING MODULE

摘要

The present invention relates to a bowl-shaped optical cover (110) for a light-emitting module. The optical cover (110) has an inner concave surface (112) for facing a light source, and an outer convex surface (114) for facing away from a light source. The optical cover (110) comprising: a micro lenses array structure (122) arranged on the inner surface (112) of the optical cover (110) for refracting light emitted from a light source; and a macro lens structure (124) formed between the micro lenses array structure (122) and the outer convex surface (114) of the optical cover (110). The macro lens structure(124) has a thickness (Z1), wherein the thickness (Z1) is varied along the optical cover (110) such that light is refracted from a thinner part towards a thicker part of the macro lens structure (124). Various embodiments of the present invention provide improved luminous intensity distribution and luminance uniformity.