The diffractive optical element blazed grating is proposed as the beam splitter for autostereoscopic displays in this study. With Lithographie Galvanoformung Abformung and inductively coupled plasma reactive-ion etching, a four-level blazed grating structure is produced. Moreover, highly translucent polydimethylsiloxane is transformed into symmetrical four-level blazed grating films. The experimental results show that the film can successfully transmit the left and the right images to the accurate positions, and the diffraction efficiency is 70.4% and the contrast ratio is above 80%, presenting the original stereoscopic image without it being affected by brightness and crosstalk. In the experiment of stereoscopic imaging, both the left and the right images could be clearly acquired, which proves the feasibility of blazed gratings as practical for the beam splitter of autostereoscopic displays.
© 2012 Optical Society of America
Diffraction and Gratings
Original Manuscript: September 28, 2011
Revised Manuscript: December 9, 2011
Manuscript Accepted: December 9, 2011
Published: February 27, 2012
Chien-Yue Chen, Qing-Long Deng, Donyau Chiang, and Yao-Ru Chang, "Binary blazed grating based on autostereoscopic display mechanism," Appl. Opt. 51, 877-882 (2012)