Optimization of process parameters for lens with micro-lens design

An injection-compression molding system for molding a lens, comprising:

• a mold insert having a first mold side having a concave surface patterned with microstructures, wherein the microstructures have a height between 0.1 μm-50 μm, a width of between 0.5 μm-1.5 mm, and a length of between 0.5 μm-1.5 mm and are arranged in a pattern multiple concentric rings, with no space between the microstructures;
• a second mold side having a convex surface, wherein the concave surface and the convex surface face each other, and an internal cavity formed between the concave surface of the first mold side and the convex surface of the second mold side, the first mold side being fixed and the second mold side configured to be moveable;
• an injection unit configured to inject a polymer into the internal cavity;
• a temperature controller connected to the first mold side and a second mold side;
• an alignment post;
• springs attached to the alignment post;
• and
• at least one spacer, wherein the at least one spacer is positioned between the springs.