2017 Volume 56 Issue 4 Pages 374-379
Holography is an ideal three-dimensional display technique. However, its electronic implementation requires light modulation by huge number of pixels whose pitch should be comparable to the wavelength of light. In this paper, several techniques proposed to overcome the above difficulty are shown;the technique using multiple spatial light modulators (SLMs), the time-multiplexing technique, the technique using acousto-optic modulators, the resolution redistribution technique, and the technique using an eye-tracking. The horizontally scanning technique using the MEMS SLMs, which has been developed by the author's group, is explained in detail in this paper. It is realized using either the screen scanning system or the viewing-zone scanning system. The two-channel viewing-zone scanning system having a screen size of 7.4 in. and a viewing zone angle of 42 degrees was demonstrated. Moreover, the 360-degrees holographic display is also realized based on the viewing-zone scanning system.
