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.
Department of Optics and Photonics, National Central University, Chung-Li 320, Taiwan. ccsun@dop.ncu.edu.tw
Shih-Hsin
SH
Ma
Xuan-Hao
XH
Lee
Tun-Chien
TC
Teng
Ye-Wei
YW
Yu
Ching-Cherng
CC
Sun