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For optical beams, transmitted by a right angle prism, the Goos-Haenchenshift can never be seen as a pure effect. Indeed, the lateral displacement,caused by the total internal reflection, will always be accompanied by angulardeviations generated by the transmission through the incoming and outgoinginterfaces. This combined effect can be analysed by using the Taylor expansionof the Fresnel coefficients. The analytic expression found for the transmittedbeam allows to determine the beam parameters, the incidence angles, and theaxial distance for which lateral displacements are compensated by angulardeviations. Proposals to optimize experimental implementations are also brieflydiscussed.

Goos-Haenchen lateral displacements and angular deviations: When these optical effects offset each other