In one embodiment, a method of assembling optical elements is provided. At least a portion of each optical element is disposed against at least a portion of a high precision surface. A structural frame is disposed adjacent the optical elements. At least two portions of the structural frame are aligned relative to each other and to the high precision surface with high precision. Adhesive is applied to adhere the structural frame to the optical elements. The adhesive is cured. In other embodiments, optical element assemblies are provided.