High-sensitivity small-angle sensor based on surface plasmon resonance technology and heterodyne interferometry.
A high-sensitivity small-angle sensor based on surface plasmon resonance technology and heterodyne interferometry is proposed that uses a new technique with two right-angle prisms. Interestingly, the technique provides a novel method for designing small-angle sensors with high sensitivity and high resolution. Its theoretical resolution can reach 1.2x10(-7) rad over the measurement range of -0.15 degrees < or =theta< or =0.15 degrees . The method has some merits, e.g., a simple optical setup, easy operation, high resolution, high sensitivity, and rapid measurement. Its feasibility is demonstrated.
Wang
Shinn-Fwu
SF
Department of Electronic Engineering, Ching Yun University, Jhongli City, Taoyuan, Taiwan, ROC.
Chiu
Ming-Hung
MH
Lai
Chih-Wen
CW
Chang
Rong-Seng
RS