[OPTICAL REVIEW Vol. 18, No. 1 (2011) 187-190]
© 2011 The Japan Society of Applied Physics

Volume Holographic Imaging Element with Background Noise Reduction Function for Eye-Gaze Detection under White Light Illumination

Yukako TAKIZAWA*, Yoichi KITAGAWA, Tetsuya MATSUMOTO, Akio MIZUNO1, Takaharu SATO2, and Osamu MATOBA2

Hyogo Prefectural Institute of Technology, Kobe 654-0037, Japan
1Kyowa Electronics Co., Ltd., Takarazuka, Hyogo 665-0051, Japan
2Graduate School of System Informatics, Kobe University, Kobe 657-8501, Japan

(Received May 31, 2010; Accepted August 31, 2010)

Volume holographic optical element (VHOE) for imaging under white light illumination is integrated with imaging elements and background noise reduction filter. An integrated VHOE and the band pass filter which is optimized to the VHOE can develop the optical setup for a wearable eye-gaze detection system. An integrated VHOE is fabricated in photopolymer and then the effects of noise reduction filters as a function of the direction of the incident plane wave into an image sensor are evaluated. Experimental results show that the background noise reduction filter should be designed to reduce the incident light with wide direction of the transmitted light.

Key words: holographic optical element, imaging element, noise reduction, white light illumination, photo polymer, eye movement

*E-mail address: yukako@hyogo-kg.go.jp