苏州大学光电科学与工程学院，江苏 苏州 215006
驾驶员通常利用车载显示器和个人设备获取导航信息，这种多界面信息交互容易分散对行车环境的注意力，影响驾驶安全。随着汽车智能化的推进，增强现实抬头显示（AR-HUD）通过将虚拟信息投影到远处，并与真实的驾驶环境相融合，大大提高了驾驶安全。回顾了AR-HUD技术，主要包括单平面抬头显示、多平面抬头显示和3D抬头显示的发展现状。介绍了评价HUD性能的主要光学指标，阐述了不同技术的基本原理和最新进展，分析了现有技术面临的挑战，最后总结了AR-HUD技术的未来发展方向。
抬头显示 3D显示 虚实融合 激光与光电子学进展
2023, 60(8): 0811008
苏州大学光电科学与工程学院，江苏 苏州 215006
增强现实（AR）显示是新型显示技术的一个重要发展方向，也是“元宇宙”的硬件入口之一。裸眼AR-3D显示在车载、教育、医疗等领域具有广泛的应用需求，因此受到学者和产业专家的密切关注。回顾了裸眼AR-3D显示技术，主要包括基于几何光学元件、全息光学元件、像素化衍射光学元件等AR-3D显示技术的发展现状，阐述了不同技术的基本原理，分析了现有技术存在的挑战，并对其未来的发展进行了展望。裸眼AR-3D显示将逐步改变人们的信息获取方式。
成像系统 增强现实显示 3D显示 全息光学元件 像素化衍射光学元件 激光与光电子学进展
2022, 59(20): 2011004
苏州大学光电科学与工程学院, 江苏 苏州 215006
柔性光电子器件对微纳制造技术提出了更高、更多维度的要求,包括大幅面、表面复杂结构、跨尺度、透明或柔性基底等。主要介绍基于相位元件调制的3D激光直写技术和紫外连续变频光刻技术,它们可分别实现复杂表面浮雕结构和像素化纳米结构的精确制备。此外微纳结构限定性生长或涂布方法提供了一种绿色环保的材料功能化手段。借助微纳结构图形化、功能化平台,最后介绍了新型柔性光电子材料/器件的应用创新。可以预见,微纳光制造技术将推动柔性光电子产业的持续创新发展。
光学器件 柔性 光电子器件 绿色制造 微纳制造
红外与激光工程
2020, 49(3): 0303002
Author Affiliations
Abstract
1 National Institute of Metrology, Division of Medical and Biological Measurements, Beijing 100029, P. R. China
2 Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology College of Physics, Soochow University, Suzhou 215006, P. R. China
3 Key Laboratory of Advanced Optical Manufacturing, Technologies of Jiangsu Province and Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, P. R. China
4 School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
Optical coherence tomography (OCT) has been widely applied to the diagnosis of eye diseases during the past two decades. However, valid evaluation methods are still not available for the clinical OCT devices. In order to assess the axial resolution of the OCT system, standard model eyes with micro-scale multilayer structure have been designed and manufactured in this study. Mimicking a natural human eye, proper Titanium dioxide (TiO2) materials of particles with different concentrations were selected by testing the scattering coe±cient of PDMS phantoms. The artificial retinas with multilayer films were fabricated with the thicknesses from 9.5 to 30 micrometers using spin coating technology. Subsequently, standard OCT model eyes were accomplished by embedding the retina phantoms into the artificial frames of eyes. For ease of measurement processing, a series of model eyes were prepared, and each contained films with three kinds of thicknesses. Considering the traceability and accuracy of the key parameters of the standard model eyes, the thicknesses of multilayer structures were verified using Thickness Monitoring System. Through the experiment with three different OCT devices, it demonstrated the model eyes fabricated in this study can provide an effective evaluation method for the axial resolution of an ophthalmic OCT device.
Optical coherence tomography metrology optical standards and testing spin coating Journal of Innovative Optical Health Sciences
2018, 11(3): 1850013
Author Affiliations
Abstract
1 Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2 Faculty of Information Technology, Macau University of Science and Technology, Macao, China
3 Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, Collaborative Innovation Center for Optoelectronic Science and Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China
4 e-mail: wenqiao@szu.edu.cn
5 e-mail: hzhang@szu.edu.cn
Owing to its thickness-modulated direct energy band gap, relatively strong light–matter interaction, and unique nonlinear optical response at a long wavelength, few-layer black phosphorus, or phosphorene, becomes very attractive in ultrafast photonics applications. Herein, we synthesized a graphene/phosphorene nano-heterojunction using a liquid phase-stripping method. Tiny lattice distortions in graphene and phosphorene suggest the formation of a nano-heterojunction between graphene and phosphorene nanosheets. In addition, we systematically investigate their nonlinear optical responses at different wavelength regimes. Our experiments indicate that the combined advantages of ultrafast relaxation, broadband response in graphene, and the strong light–matter interaction in phosphorene can be combined together by nano-heterojunction. We have further fabricated two-dimensional (2D) nano-heterojunction based optical saturable absorbers and integrated them into an erbium-doped fiber laser to demonstrate the generation of a stable ultrashort pulse down to 148 fs. Our results indicate that a graphene/phosphorene nano-heterojunction can operate as a promising saturable absorber for ultrafast laser systems with ultrahigh pulse energy and ultranarrow pulse duration. We believe this work opens up a new approach to designing 2D heterointerfaces for applications in ultrafast photonics and other research. The fabrication of a 2D nano-heterojunction assembled from stacking different 2D materials, via this facile and scalable growth approach, paves the way for the formation and tuning of new 2D materials with desirable photonic properties and applications.
(140.4050) Mode-locked lasers (140.3510) Lasers fiber (140.3500) Lasers erbium (160.4330) Nonlinear optical materials. Photonics Research
2017, 5(6): 06000662
1 深圳大学纳米光子学研究中心, 广东 深圳 518060
2 深圳大学光电工程学院光电子器件与系统教育部/广东省重点实验室, 广东 深圳 518060
3 阿德莱德大学光子和先进传感器研究所, 阿德莱德 5005
研究了轨道角动量(OAM)模式在柚子型微结构光纤(MOF)中的传输。光纤纤芯周围存在一层直径为3 μm的柚子型空气孔, 由于空气孔与光纤纤芯之间存在较大的折射率差, 传输的光被局限在纤芯中, 从而形成稳定的传输模式。通过有限元法对光纤中的矢量本征模式进行模拟, 得到了模式的有效折射率和模场分布。结果表明, MOF在630 nm波长附近可支持10个OAM模式传输, 各模式间的有效折射率差达到0.01以上,较大的有效折射率差可抑制光纤中各模式间的相互耦合, 从而提高OAM模式在光纤中的传输性能。实验中利用特殊设计的光学旋涡达曼光栅对在光纤中传输1 m的OAM1,1和OAM-1,1模式进行解调。
光纤光学 轨道角动量 有限元法 柚子型微结构光纤 有效折射率差 模式传输
深圳大学光电工程学院, 光电子器件与系统(教育部， 广东省)重点实验室, 广东 深圳 518060
在荧光显微镜中，微弱的荧光信号一般淹没于较强的激发光中，显微镜的成像质量在很大程度上取决于提取微弱荧光信号的能力。目前，荧光显微镜均根据荧光与激发光波长的差异，采用频率滤波法滤除激发光，实现图像增强。但该方法不仅对滤光片要求高，而且对荧光和激发光的波长有严重的依赖性。基于激发光与荧光在偏振态上的差异，提出了一种用于荧光显微镜的正交偏振滤波图像增强技术。研究表明，正交偏振滤波图像增强技术能够显著地提高成像质量，对光学元件性能参数的要求大幅度降低。丰富了从强激发光中提取弱荧光信号的技术手段，为今后解决波长可调谐的多光谱荧光显微镜、白光照明多光谱荧光显微镜等技术上的瓶颈提供了参考。
生物光学 荧光显微镜 图像增强 正交偏振 滤波 中国激光
2012, 39(10): 1004002
1 天津大学 精密仪器与光电子工程学院，天津 300072
2 中国民航大学 航空自动化学院，天津 300300
提出了一种新的近红外多光谱检测法对碳纤维复合材料结构机翼表面的残冰进行检测。建立了该方法的理论模型并进行了实验验证。首先，根据冰与水和除冰液在不同红外波段下具有不同反射光谱特性，提出了用于残冰检测的理论算法。然后对参考通道，低通道及高通道所测图像的灰度值进行比较分析， 总结得到了判断机翼蒙皮上残冰存在的对比度阈值C。最后，分析了误差可能产生的区间及消除方法。实验结果表明，对于白色涂层的复合材料结构蒙皮，当C>0.03时，就可以断定结构表面上存在残冰；当C<0时，可以断定表面上肯定没有冰；当C处于0~0.03时，为安全起见需要对蒙皮进行二次检查以消除不确定因素产生的误差。而对于其他颜色涂层蒙皮的残冰检测，要根据不同的颜色设定不同的对比度阈值C。本研究证明了可以将冰与水的近红外反射光谱差异特性应用到以复合材料结构为机翼蒙皮的残冰检测中。
近红外多光谱 残冰检测 机翼蒙皮 对比度 near infrared multispectra ice detection aircraft wing contrast
