Research Progress of Stress Measurement Technologies for Optical Elements

Figure 4

Measured and calculated results of birefringence retardation and azimuthal angle near the center of the glass [25]. (a) The measured result of birefringence retardation, (b) calculated result of birefringence retardation, (c) measured result of azimuthal angle, and (d) calculated result of azimuthal angle.