Dear Sir, I＇m Boris Severinsky from the New England College of Optometry, Boston, USA. I write you to present an interesting case of extreme refractive and corneal topography changes induced by daily wearing of Acuv...Dear Sir, I＇m Boris Severinsky from the New England College of Optometry, Boston, USA. I write you to present an interesting case of extreme refractive and corneal topography changes induced by daily wearing of Acuvue Advance （Johnson＆Johnson, Vision Care） contact lens （CL）.展开更多
We have numerically analyzed the thermal effects in Nd： YLF laser rod. The calculations of temperature and stress distributions in the Nd： YLF laser rod were performed with finite element （FE） simulations. The cal...We have numerically analyzed the thermal effects in Nd： YLF laser rod. The calculations of temperature and stress distributions in the Nd： YLF laser rod were performed with finite element （FE） simulations. The calculations showed that the laser rod could be pumped up to a power of 40 W without fracture caused by thermal stress. The calculated thermal lens power of thermally induced lens in Nd： YLF （o--polarization） laser rod was analyzed and validated experimentally with two independent techniques. A Shack-Hartmann wavefront sensor and a Mach-Zehnder interferometer were used for direct measurements of focal thermal lens at different pump powers. The obtained measurements were coinciding with the FE simulations.展开更多
文摘Dear Sir, I＇m Boris Severinsky from the New England College of Optometry, Boston, USA. I write you to present an interesting case of extreme refractive and corneal topography changes induced by daily wearing of Acuvue Advance （Johnson＆Johnson, Vision Care） contact lens （CL）.
文摘We have numerically analyzed the thermal effects in Nd： YLF laser rod. The calculations of temperature and stress distributions in the Nd： YLF laser rod were performed with finite element （FE） simulations. The calculations showed that the laser rod could be pumped up to a power of 40 W without fracture caused by thermal stress. The calculated thermal lens power of thermally induced lens in Nd： YLF （o--polarization） laser rod was analyzed and validated experimentally with two independent techniques. A Shack-Hartmann wavefront sensor and a Mach-Zehnder interferometer were used for direct measurements of focal thermal lens at different pump powers. The obtained measurements were coinciding with the FE simulations.
