Enhanced rotational Bragg selectivity by use of random phase encoding in volume holographic filter.
An out-of-plane angular detection scheme with random phase encoding is proposed. A ground glass is attached on a rod, which is rotated around a center point, so that the rotation of the rod induces the displacement of the ground glass in a circular path. To enhance the rotational sensitivity we adjust the Bragg selectivity of the volume holographic optical element encoded by random phase. Therefore, the rotational sensitivity can be tuned over a large range from several degrees to ten thousandth degrees by changing the radius of rotation. The theoretical calculation, as well as experiment, is demonstrated.
Ma
Shih-Hsin
SH
Department of Optics and Photonics, National Central University, Chung-Li 320, Taiwan. ccsun@dop.ncu.edu.tw
Lee
Xuan-Hao
XH
Teng
Tun-Chien
TC
Yu
Ye-Wei
YW
Sun
Ching-Cherng
CC