1. Visor-display design based on planar holographic optics
2. Ichiro Kasai, Yasushi Tanijiri, Takeshi Endo, Hiroaki Ueda, “A Forgettable Near Eye Display, Proc. 4thInt. Symp on Wearable Computers, pp 115–8, 2000.
3. Yaakov Amitai, “Substrate Guided Optical Beam Expander”, patent US 6829095, 2004