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Figure 3
System diagram: (1) He–Ne laser (λ = 0.6328 µm); (2) polarizer; (3) diffuser; (4) plane-parallel crystal plate with positive optical sign, cut perpendicular to the optical axis; (5) investigated crystal plate installed at angle α = 5–15° between the optical axis and the axis of the optical system; (6) analyser; (7) screen. |