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GLV modules incorporate unique pixel designs to achieve different optical properties. As shown in the figure, each GLV pixel is composed of moving “active” ribbons interleaved with static “bias” ribbons. F1088 modules use a “flat” light valve design in which active and bias ribbons are structurally identical. The FLV device is relatively wavelength-agnostic and delivers the highest contrast in 1st-order imaging. The G1088 and G8192 modules use a “true-GLV” design in which the bias ribbons are replaced by metallized regions on substrate. This design offers the advantage of improved efficiency and contrast in 0th-order imaging. Finally, in the case where bias ribbons are eliminated entirely, the GLV pixel comprises only active ribbons. This is the configuration used in the F1088-P phase modulator.