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A model of an optical disk containing data pits with a range of depths and orientation angles is simulated to investigate how the Stokes parameters of the light reflected from these pits vary. Pits carrying multiple bits of information can be recovered according to the Stokes parameters, particularly S0 and S1, which show different variation trends versus the depth and orientation angles. In addition, the signal width of S0 ceases to be constant, and instead varies as a function of the orientation angle during laser scanning. This can double the available modulation range of the orientation angle and further enhance disk storage densities. [ABSTRACT FROM AUTHOR]