Half wave plate selection

Fig. 1.16 The most general three-color experiment, HS harmonic separator, BS beam splitter, BBO (3-barium borate crystal, HCR hollow cube retroreflector, BP Brewster prism, CS cover slip, A/2 half wave plate, P polarizer, PM parabolic mirror, S sample, PD/LIA photodiode/lock-in amplifier. The solid lines indicate 800 nm beams, the dotted lines are the 530 nm beams, and the dashed lines are the 400 nm beams. The intervening optics between the DOE and the sample are not shown for clarity. Half-wave plates and phase plates are introduced in the straight section between the parabolic mirrors to enable the selection of any tensor element, mixed polarization state, or to perform a phase scan...

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