The Fabry–Perot(FP) resonant cavity is widely used in laser and spectroscopic measurements due to its unique interference transfer function(ITF). In the ideal case of parallel incident light, the ITF of the FP resona...The Fabry–Perot(FP) resonant cavity is widely used in laser and spectroscopic measurements due to its unique interference transfer function(ITF). In the ideal case of parallel incident light, the ITF of the FP resonant cavity can be expressed by the Airy function. However, in reality, it is difficult to achieve perfect parallelism with collimated beams. In this article, a theoretical model is established for non-parallel light incidence, which assumes that the non-parallel incident light is a cone-shaped beam, and the cone angle is used to quantify the non-parallelism of the beam. The transmittance function of the FP resonant cavity under non-parallel light incidence is derived. The accuracy of the model is experimentally verified. Based on this model, the effects of divergence angle, tilt angle and FP cavity parameters(reflectivity, cavity length)on the ITF are studied. The reasons for the decrease in peak value, broadening and asymmetry of the interference peak under non-parallel light incidence are explained. It is suggested that a fine balance between the interference peak and the collimation effect of the incident light should be considered in the design and application of FP resonant cavities, especially for tilted applications such as angle-scanned spectroscopy. The research results of this article have certain significance for the design and application of FP resonant cavities.展开更多
目的:探讨单、双操作孔胸腔镜手术(VATS)治疗原发性肺癌的临床效果。方法:选取行VATS的85例原发性肺癌患者,随机分为两组。单孔组41例用单操作孔行VATS,双孔组44例用双操作孔开展VATS,观察并记录两组术中出血量、术后3d疼痛评分(VAS)、...目的:探讨单、双操作孔胸腔镜手术(VATS)治疗原发性肺癌的临床效果。方法:选取行VATS的85例原发性肺癌患者,随机分为两组。单孔组41例用单操作孔行VATS,双孔组44例用双操作孔开展VATS,观察并记录两组术中出血量、术后3d疼痛评分(VAS)、拔管时间、淋巴结清扫个数及手术时间,另比较两组并发症发生情况。结果:两组淋巴结清扫个数、术中出血量经比较,差异无统计学意义(P>0.05),单孔组术后3 d VAS、拔管时间及手术时间较双孔组,均显著低于后者,差异有统计学意义(P<0.05)。两组肺炎、皮下气肿、持续液气胸及肺不张等并发症发生情况相比较,差异无统计学意义(P>0.05)。结论:针对原发性肺癌患者,采用单操作孔VATS治疗,手术操作简便,恢复快,疼痛轻,临床应用价值高。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No.U19A2044)the National Natural Science Foundation of China (Grant No.41975037)the Key Technologies Research and Development Program of Anhui Province (Grant No.202004i07020013)。
文摘The Fabry–Perot(FP) resonant cavity is widely used in laser and spectroscopic measurements due to its unique interference transfer function(ITF). In the ideal case of parallel incident light, the ITF of the FP resonant cavity can be expressed by the Airy function. However, in reality, it is difficult to achieve perfect parallelism with collimated beams. In this article, a theoretical model is established for non-parallel light incidence, which assumes that the non-parallel incident light is a cone-shaped beam, and the cone angle is used to quantify the non-parallelism of the beam. The transmittance function of the FP resonant cavity under non-parallel light incidence is derived. The accuracy of the model is experimentally verified. Based on this model, the effects of divergence angle, tilt angle and FP cavity parameters(reflectivity, cavity length)on the ITF are studied. The reasons for the decrease in peak value, broadening and asymmetry of the interference peak under non-parallel light incidence are explained. It is suggested that a fine balance between the interference peak and the collimation effect of the incident light should be considered in the design and application of FP resonant cavities, especially for tilted applications such as angle-scanned spectroscopy. The research results of this article have certain significance for the design and application of FP resonant cavities.
文摘目的:探讨单、双操作孔胸腔镜手术(VATS)治疗原发性肺癌的临床效果。方法:选取行VATS的85例原发性肺癌患者,随机分为两组。单孔组41例用单操作孔行VATS,双孔组44例用双操作孔开展VATS,观察并记录两组术中出血量、术后3d疼痛评分(VAS)、拔管时间、淋巴结清扫个数及手术时间,另比较两组并发症发生情况。结果:两组淋巴结清扫个数、术中出血量经比较,差异无统计学意义(P>0.05),单孔组术后3 d VAS、拔管时间及手术时间较双孔组,均显著低于后者,差异有统计学意义(P<0.05)。两组肺炎、皮下气肿、持续液气胸及肺不张等并发症发生情况相比较,差异无统计学意义(P>0.05)。结论:针对原发性肺癌患者,采用单操作孔VATS治疗,手术操作简便,恢复快,疼痛轻,临床应用价值高。
