Producing liquid crystal assemblies

A device, comprising:

• an assembly having a curved profile comprising a change in curvature in a first region of the assembly,
• wherein the assembly comprises liquid crystal material contained between two halves of the assembly in a region bounded by a barrier;
• and
• wherein the barrier is located in the first region of the assembly.

A method, comprising:

• producing an assembly in preparation for a later process of permanently stretching one or more parts of the assembly;
• wherein the assembly comprises an amount of liquid crystal (LC) material in a region laterally bounded by a lateral barrier;
• and
• wherein producing the assembly comprises determining the amount of LC material, based at least partly on one or more parameters of the later stretching process.

A method, comprising:

• producing an assembly in preparation for creating in the assembly a curved profile comprising a change in curvature in a first region of the assembly,
• wherein the assembly comprises liquid crystal material contained between two halves of the assembly,
• wherein at least one of the halves of the assembly defines spacer columns in at least an active region of the assembly;
• and
• wherein producing the assembly involves varying a configuration of the spacer columns across the active region in accordance with a variation in pressure applied to the assembly across the active region when creating the curved profile.