Local scattering stress distribution on surface of a spherical cell in optical stretcher.
Local scattering stress distribution on surface of a spherical cell in optical stretcher.
复制标题
光学展宽器中球形单元表面的局部散射应力分布。
作者：
Paul B Bareil;Y. Sheng;A. Chiou
本文用射线光学方法计算了在光学展宽器中被两束反向传播光束捕获的球形细胞表面的应力分布。我们证明了无论入射角、偏振态以及表面的反射率和透射率如何，局部散射应力都垂直于球面折射表面。我们解释了在应力分布，这是没有透露在现有的理论中出现的峰值。我们考虑了来自光纤的入射光束的发散度，并将应力分布表示为光纤到单元距离的函数。新的理论可以更精确地预测细胞的变形。
We calculate stress distribution on the surface of a spherical cell trapped by two counter propagating beams in the optical stretcher in the ray optics regime. We demonstrate that the local scattering stress is perpendicular to the spherical refractive surface regardless of incident angle, polarization and the reflectance and transmittance at the surface. We explain the apparition of peaks in the stress distribution, which were not revealed in the existing theory. We consider the divergence of the incident beams from the fibers, and express the stress distribution as a function of fiber-to-cell distance. The new theory can predict the cell's deformation more precisely.