Optical structures

A method for forming an optical structure having a microstructured surface on at least one side, comprising disposing a plurality of two-sided optical components along the substrate, each component having optical microstructures on each side, wherein at least a portion of one side of at least some of the components is air-backed, the other side of the at least some of the components being substantially wetted-out by a material.

A method for forming an optical structure comprising:

• providing a substrate;
• and
• providing a plurality of two-sided optical components along the substrate, wherein at least one side of substantially all of the components is air-backed and the other side of substantially all of the components is substantially wetted-out.

A retroreflective structure comprising:

• a fill layer;
• and
• a plurality of two-sided retroreflective cube-corner prism components disposed within the fill layer, wherein one side of the components has a reflective coating thereon.

An optical structure comprising a first substrate and a second substrate, each substrate having a plurality of microstructures disposed on a surface, the first substrate being positioned relative to the second substrate with the microstructures from the first substrate facing the microstructures from the second substrate with at least some air space disposed there between.

An optical structure comprising a plurality of microstructures enclosed within an outer layer that is formed from a single substrate.

A method for forming an optical structure comprising encasing a plurality of microstructures within an outer layer that is formed from a single substrate.