index prism
1.Surface plasmons are excited at a specific incident angle and result in a massive reduction in reflectivity at that angle required for excitation. Changing in the interfacial refractive index results in a change of the optimal angle required for excitation . Using a prism SPW sensor testing system ,measure the relationship between different concentration from 0% to 70% glycerine solution refractive index and resonant angle.
3.This paper presents the designing of a high accuracy linear scannerused in laser beam scanning systems for automatic inspection of object size by means of a rectangular prism and correct selection of the rotation centre. The trasmitted laser beam scans in the direction precisely paralleled to outlet direction. For the prismatic glass with refraction index of about 1.9 and the measurement region up to 43.74mm, the maximum linear error is less than±20nm.
