A simple capillary-based extrinsic Fabry–Perot structure is presented and fabricated, using the manual welding method with the strain sensing characteristics investigated in detail. Strain sensitivities of 4.2, 2.8, and
红外实时人体目标检测因无需主动光源、易于去除环境干扰等优点成为近年来人工智能领域的一个研究热点。当前主流实时红外嵌入式图像采集处理方式因图像传输、接口速度、工程量等技术局限,制约了红外人体目标检测的便捷实现和实时利用。针对传统嵌入式处理器难以同时采集和处理红外数据这一影响红外人体目标检测实时性的技术问题,研究了基于ZYNQ异构多核处理器的实时检测技术。采用FPGA+多核ARM架构,由FPGA端实现
High-resolution lens-coupled indirect X-ray scintillator imagers are required by many imaging applications. However, the severe weakening of image details prevents its further performance improvement. Through our research, this image degradation is attrib
Micro-optic elements have been fabricated in silica and soda-lime glass with femtosecond laser pulses. The dependence of refractive index change on pulse duration, pulse energy and scan passes is investigated and a Fresnel zone plate is induced. A permane
高精度KDP晶体是惯性约束核聚变光路系统中的重要元件,而已加工表面的小尺度波纹对光学元件的透射比有着重要影响。采用傅里叶模方法理论分析了表面小尺度波纹的幅值及周期对KDP光学元件透射比的影响。研究结果表明,当小尺度波纹幅值小于100 nm时,透射比随波纹幅值的增加基本呈线性增长,波纹幅值每提高10 nm,透射比可提高近0.5%;透射比随着小尺度波纹周期的增加围绕中心透射比上下浮动,透射比振幅基本保持不变,且中心透射比及透射比振幅均随着小尺度波纹幅值的增加而增大;小尺度波纹周期在10.5-12 μm区间内时
具体给出了含可饱和吸收体的单模驻波激光系统的哈密顿(Hamiltonian)量和序参量运动方程,并对序参量的定态解做了线性稳定性分析。结果表明,驻波系统在阈值附近的定态行为(非平衡相变行为、双稳行为、临界点附近的指数行为等)与行波系统定性类似,但具体细节有异。特别不同于行波的是,驻波情形下三个定态解中的I_分支有可能实现。
An organic light-emitting diode (OLED) device with high efficiency and brightness is fabricated by inserting CuOx/Cu dual inorganic buffer layers between indium-tin-oxide (ITO) and hole-transport layer (HTL). The CuOx/Cu buffer layer limits the
采用提拉法生长了CdWO4:Cr3 单晶.测量了它的吸收光谱及其退火效应,认为Cr3 吸收峰降低的原因是色心和杂质引起的自吸收。并根据吸收谱,确定了Cr3 的几个主要能级4T1、4T2和2E位置,以及2E和4T2能级差△E=-1430.1cm-1。
In this Letter, a new approach of optical tape for high capacity multilayer data storage is proposed. We show that a length of 5 cm and width of 2 cm of soft and transparent optical tape can be used for two-photon three-dimensional bit data storage. We su
本文指出了一些文献在计算双轴体有效非线性系数d_(eff)时的某些不当之处,说明了正确计算方法。并以mm2点群的双轴晶体为例全面地给出了d_(eff)的计算公式,用已有的实验结果加以验证。这一计算方法使得通用的双轴晶体变频器件最佳相位匹配的计算机设计得以实现。