Abstract
Abstract Specific light deflection phenomena are observed in ferroelastic crystals. Above a critical angle of incidence x c , four deflected beams, which are linearly polarized, are observed with a laser beam incidence. The polarizing directions of the deflected beams are directly related to the directions of axes of the optical indicatrix in the ferroelastic domains. The relation between the angle of incidence α and the angles of deflection χ, and the polarizing directions of the deflected beams are explained by the Huygens constructions to the ray-velocity cross sections at the crystal surfaces and the domain walls in the incident plane. This optical phenomenon is confirmed as a specific property of ferroelastic crystals with multidomains. The properties of the deflected beams are described in detail.
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