【摘 要】
：
The feasibility of measuring crater geometries by use of optical coherence tomography (OCT) is examined. Bovine shank bone on a motorized translation stage with a motion velocity of 3 mm/s is ablated with a pulsed CO2 laser in vitro. The laser pulse repet
【机 构】
：
KeyLaboratoryofOpto-ElectronicScienceandTechnologyforMedicineofMinistryofEducation,FujianNormalUnive
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
The feasibility of measuring crater geometries by use of optical coherence tomography (OCT) is examined. Bovine shank bone on a motorized translation stage with a motion velocity of 3 mm/s is ablated with a pulsed CO2 laser in vitro. The laser pulse repetition rate is 60 Hz and the spot size on the tissue surface is 0.5 mm. Crater geometries are evaluated immediately by both OCT and histology methods after laser irradiation. The results reveal that OCT is capable of measuring crater geometries rapidly and noninvasively as compared to histology. There are good correlation and agreement between crater depth estimates obtained by two techniques, whereas there exists distinct difference between crater width estimates when the carbonization at the sides of craters is not removed.
其他文献
太阳能飞艇依赖于光伏阵列提供能量, 但曲面面形引起的非均匀光照会造成光伏阵列的能量损失。文章将遗传算法引入光伏阵列优化研究, 通过优化光伏阵列拓扑结构, 降低模块间的失配现象, 从而达到增大输出功率的目的。首先基于光伏电池的单二极管模型, 给出光伏阵列的仿真方法。其次提出基于遗传算法的光伏阵列拓扑结构的优化方法, 采用序列编码方式, 将光伏阵列拓扑结构转化为染色体编码, 通过染色体基因位的交叉变异实现光伏阵列拓扑结构的优化。以某太阳能飞艇为例进行仿真验证, 优化后光伏阵列平均输出功率增大2.32%, 仿真
Band structures of one-dimensional (1D) photonic crystals (PCs) containing dispersive left-handed metamaterials are studied theoretically. The results show that the structure possesses a type of photonic band gap originating from total internal reflection
研究了光学频率标准和高分辨率激光光谱学的发展现状和前景。在光学标准方面特别注意连续染料激光器频率稳定的新方法。在讨论的非线性激光光谱法中，最重要的是偏振光谱学、拉姆斯光学共振法、光压力控制的原子和分子的光谱学。叙述了它们在基本研究，特别是在基本粒子物理学中的应用。
锁模激光器很快成为近代光谱学的重要工具。各种脉冲和连续激光器可以通过锁模在红外3微米和近紫外300毫微米之间产生多个波长的微微秒脉冲。为了研究物质的光学性质，用锁模激光器得到的亚微微秒脉冲,巳达到了迄今为止的最髙时间分辨率。
在Si衬底上形成的GaAs激光器室温下获得连续振荡，它是由美国伊利诺斯大学、德克萨斯仪器公司中央研究所、泽罗克斯研究中心组成的小组试制的。
分析了激光的双光栅移频效应,并作了实验验证.这一效应可用来测量小位移量或速度值,比表氏干涉仪简单易调,并已试用于穆氏谱仪上测定振动速度,效果理想.
A beam deflector was designed and fabricated by using a lead lanthanum zirconate titanate (PLZT) ceramic with high quadratic electro-optic (EO) effect, based on refraction at an interface between areas with and without applied voltage. Its EO coefficients
针对动态目标的多自由度振动测试问题,建立了基于双面阵CCD交汇测量技术的动态目标振动测试系统。通过两台相机拍摄目标靶振动图像,对所得图像进行图像处理后提取目标点像素位置信息,根据目标点像素始末位置变化解算出目标靶X、Y、Z三个维度的位移变化量。实验结果表明,测量精度约为0.1mm。测量系统具有结构紧凑、测量精度高、适用性强等特点。