Parameter dependence of optical conductivity in antiferromagnetic phase of iron pnictides

► We investigate the optical conductivity of iron pnictides with antiferromagnetically low or high magnetization and with or without a strong orbital ordering. ► In addition, we investigate the Dirac cone structure which is crucial for the low energy excitation. ► We conclude that the low energy part of the optical conductivity is relevant to the Dirac cone structure rather than orbital ordering.