This invention pertains to the design of optimized far field viewing
devices that simultaneously produce bright far field holographic light
patterns and achieve good see-through performance to present a well
focused scene. A far field transmission hologram recorded on a
transparent substrate has regions having high diffraction efficiency
juxtaposed with regions having low diffraction efficiency. The high
diffraction efficiency regions contribute to production of bright far
field holographic light patterns, whereas the low diffraction efficiency
regions contribute to see-through performance.