Relay optical lens elements with at least one tir surface

An optical projection system comprising:

• a light source;
• collimating optics configured to provide collimated light from the light source;
• a relay optical lens element configured to receive the collimated light, the relay optical lens element comprising:
• a relay optical lens component made from a plastic material, the relay optical lens component comprising:
• a first convex lens formed of the plastic material, the first convex lens configured to act as an entrance pupil for the relay optical lens element;
• a first total internal reflection (TIR) surface formed at a first planar exterior surface of the relay optical lens component, the first TIR surface configured for light having entered through the first convex lens to undergo TIR inside the relay optical lens component at the first TIR surface;
• and
• a second convex lens formed of the plastic material, the second convex lens configured for the light having undergone the TIR at the first TIR surface to exit the relay optical lens element;
• a microdisplay configured to receive light exiting the relay optical lens element;
• and
• a projection lens configured to receive light from the microdisplay.