【摘 要】
：
We have designed and demonstrated a simple, wide field-of-view (FOV=60\circ) foveated imaging system utilizing a deformable mirror. The deformable mirror is used to dynamically correct the off-axis aberrations that limit the useful FOV of the system. The
【机 构】
：
StateKeyLaboratoryofTransientOpticsandPhotonics,Xi’anInstituteofOpticsandPrecisionMechanics,ChineseA
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
We have designed and demonstrated a simple, wide field-of-view (FOV=60\circ) foveated imaging system utilizing a deformable mirror. The deformable mirror is used to dynamically correct the off-axis aberrations that limit the useful FOV of the system. The system mimics the operation of human eye through creating an image with variable spatial resolution and can be made significantly smaller and more compact than a conventional wide FOV system. Experiments show that this system can be used in many areas where size, weight, and data transmission bandwidth are critical.
其他文献
A special optical fiber is investigated, which has a helical core in the cylindrical cladding. The beam propagation method (BPM) is used for analyzing the impacts of the geometric and physical parameters on the properties of mode losses of the helical-cor
观察了在不同气压比例下C6H14对CH3F496微米激光振荡的影响。最佳气压比是CH3F:C6H14=1:2,与纯CH3F相比较,远红外激光输出功率增加了53％。
研究了存在原子间有效三体相互作用的情况下双阱势场中超冷玻色气体的相位相干性，其中引入无序分布的阱深差来模拟无序势。研究发现，在无序Bose-Hubbard模型中，重整化的三体相互作用能有效增强玻色气体的相位相干性。同时，在强无序势条件下，讨论了平均相位相干性对三体相互作用的依赖关系。据我们所知，这是首次对无序量子气体中的有效三体相互作用进行研究。
大阪变压器厂最近制成额定功率为5千瓦，最大功率为6千瓦的CO2激光加工机。这种CO2激光加工机是高速轴流形激光加工机，是与英国焊接技术研究所(TWD技术协作之结果。因光束横模是单模，故聚焦性能好。早先制成的2千瓦机已获得20%以上的高变换效率,可焊接12毫米厚的钢板。
We demonstrate an ultralow-noise single-photon detection system based on a sensitive photomultiplier tube (PMT) with precise temperature control, which can capture fast single photons with intervals around 10 ns. By improvement of the electromagnetic shie
黏膜组织病变多起源于浅层上皮组织,因此研究亚扩散域的空间分辨漫反射光谱分布特性对于黏膜组织早期病变识别具有重要意义。在亚扩散区域,除了吸收系数μa与约化散射系数μ's外,二阶散射定向因子γ对组织漫反射率也有较大影响。为实现三个光学参数的同时定量反构,面向实际应用基于光纤几何和Gegenbauer-kernel (GK)相函数的蒙特卡罗模拟建立正向数值模型,采用3D查表(3D-LUT)法和反向传播神经网络 (BPNN)反
Classical wisdom of wave–particle duality regulates that a quantum object shows either the particle or wave nature but never both. Consequently, it would be impossible to observe simultaneously the complete wave and particle nature of the quantum object.
利用高温熔融法成功合成了NaY2F7∶Eu透明微晶玻璃。X射线衍射、透射电子显微镜和选区电子衍射表明NaY2F7纳米晶成功形成并且均匀分散在玻璃基质中，其粒径大小在31~38 nm之间。在340 nm波长激发下，样品表现出Eu2 的蓝光宽带发射，峰值位于425 nm处，表明Eu3 在空气中成功地还原为Eu2 。在393 nm波长激发下，样品具有很强的红光
利用TiN纳米粒子对CdSe量子点和多孔Al2O3薄膜构成的异质结的表面荧光增强效应进行了实验研究。采用电化学沉积的方法,将TiN纳米粒子沉积于多孔Al2O3薄膜表面,再将胶体CdSe量子点自组装于TiN/Al2O3薄膜的表面,进而制备了CdSe/TiN/Al2O3异质结。同时,利用扫描近场光学显微镜测量了CdSe/TiN/Al2O3异质结的表面增强荧光效应。结果表明,由于TiN具有良好的电子传输特性,提高了CdSe量子点和多孔Al2O3薄膜之间的光生电子转移效率,进而增强了多孔Al2O3薄膜界面的荧光。