Athermalization concepts for polymer eyepieces used in augmented reality or mixed reality devices

An eyepiece comprising:

• a first eyepiece layer;
• a second eyepiece layer positioned substantially parallel to the first eyepiece layer;
• and
• a plurality of spacers disposed between the first eyepiece layer and the second eyepiece layer, the plurality of spacers comprising an edge spacer and a pillar spacer,
• wherein the plurality of spacers is configured to:
• maintain a consistent gap between the first eyepiece layer and the second eyepiece layer, and
• permit relative sliding between the first eyepiece layer and the second eyepiece layer.

A display comprising:

• a frame;
• and
• an eyepiece coupled to the frame, wherein the eyepiece comprises:
• a first eyepiece layer;
• a second eyepiece layer positioned substantially parallel to the first eyepiece layer;
• and
• a plurality of spacers disposed between the first eyepiece layer and the second eyepiece layer, the plurality of spacers comprising an edge spacer and a pillar spacer,
• wherein the plurality of spacers is configured to:
• maintain a consistent gap between the first eyepiece layer and the second eyepiece layer, and
• permit relative sliding between the first eyepiece layer and the second eyepiece layer.