The expressions for the thermal lens of linearly polarized radiation arising in m3m, 432 and $\bar {4}3\text{m}$ cubic crystals with arbitrary crystallographic axes orientation in the presence of circular birefringence $\delta _{\mathbf {c}}$ are analyzed. It is shown that the thermal lens may have astigmatism the magnitude of which is proportional to the power of heat generation. The Euler angles determining the crystallographic axes orientation [P] are found and the conditions for the material constant – optical anisotropy parameter $\xi $ – under which the thermal lens astigmatism in active and magneto-active optical elements can be eliminated, are formulated. It is demonstrated that the orientation [P] depends only on optical anisotropy parameter $\xi $ of the crystal and on circular birefringence $\delta _{\mathbf {c}}$ .

中文翻译：

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由 m3m、432 和 43m 对称立方晶体中的光弹性效应引起的热透镜散光

以 m3m、432 和 $\bar {4}3\text{m}$ 在存在圆形双折射的情况下具有任意晶轴取向的立方晶体 $\delta _{\mathbf {c}}$ 进行了分析。结果表明，热透镜可能具有散光，散光的大小与产生的热量成正比。确定了晶轴方向 [P] 的欧拉角和材料常数的条件 - 光学各向异性参数 $\xi $ – 制定了可以消除有源和磁有源光学元件中的热透镜散光的方法。证明了方向 [P] 仅取决于光学各向异性参数 $\xi $ 晶体和圆形双折射 $\delta _{\mathbf {c}}$ .