1 西安工业大学 光电工程学院, 陕西 西安 710021
2 陕西省光电测试与仪器技术重点实验室, 陕西 西安 710021
3 中国兵器装备集团公司黑龙江北方工具有限公司, 黑龙江 牡丹江 157000
镜头式探测器配接L形LED光源构成大面积矩形探测光幕, 常用来布置在封闭的室内靶道测量外弹道参数, 其探测区域的灵敏度大小直接影响测量精度, 文章研究和分析了配接L形LED光源的10m×10m大面积矩形探测光幕灵敏度空域分布规律, 考虑镜头边缘效应和光传播路径损失, 将飞行弹丸遮挡的光投射到镜头处计算光电器件接收的光通量变化, 推导出探测光幕灵敏度的数学表达式, 将探测区域分割成小块, 采用数字仿真方式计算同一口径弹丸穿过不同区域块引起的光通量变化, 得到矩形探测光幕区域灵敏度空域分布。结果显示矩形探测区域灵敏度呈现对称分布, 靠近镜头主光轴和镜头附近处时, 会得到探测区域内的较大探测灵敏度。其研究结果为后续进行大靶面外弹道测试相关技术提供了理论依据。
应用光学 大面积探测光幕 空域灵敏度分布 L形光源 applied optics large area detection light screen spatial sensitivity distribution L-shaped light source
长春理工大学光电工程学院， 吉林 长春 130022
依据光学薄膜理论及光学材料的特性，结合膜系设计软件，采用拆分技术原理，实现了双面膜系的设计，解决了单面膜层过厚、应力过大的问题。利用逆向分析法对实验测试结果进行反演，通过对膜层敏感度分布的研究，分析了产生误差的原因。采用不同的监控方式，使膜系的敏感层厚度得以精准控制。最终研制的滤光膜光谱测试结果表明，3.31 μm单点透射率为93.7%，通带半峰全宽为49 nm，1~3.2 μm和3.4~5 μm波段平均透射率为0.17%，满足系统使用要求。
薄膜 拆分技术 逆向分析法 敏感度分布 窄带滤光膜
Author Affiliations
Abstract
1 State Key Lab Elect Thin Film & Integrated Device and Department of Biomedical Engineering, University of Electronic Science & Technology of China, Chengdu 610054, P. R. China
2 Design Department No. 2, Avic Beijing Keeven Aviation Instrument Co. Ltd, Beijing 100086, P. R. China
Modeling Light propagation within human head to deduce spatial sensitivity distribution (SSD) is important for Near-infrared spectroscopy (NIRS)/imaging (NIRI) and diffuse correlation tomography. Lots of head models have been used on this issue, including layered head model, artificial simplified head model, MRI slices described head model, and visible human head model. Hereinto, visible Chinese human (VCH) head model is considered to be a most faithful presentation of anatomical structure, and has been highlighted to be employed in modeling light propagation. However, it is not practical for all researchers to use VCH head models and actually increasing number of people are using magnet resonance imaging (MRI) head models. Here, all the above head models were simulated and compared, and we focused on the effect of using different head models on predictions of SSD. Our results were in line with the previous reports on the effect of cerebral cortex folding geometry. Moreover, the influence on SSD increases with the fidelity of head models. And surprisingly, the SSD percentages in scalp and gray matter (region of interest) in MRI head model were found to be 80% and 125% higher than in VCH head model. MRI head models induced nonignorable discrepancy in SSD estimation when compared with VCH head model. This study, as we believe, is the first to focus on comparison among full serials of head model on estimating SSD, and provided quantitative evidence for MRI head model users to calibrate their SSD estimation.
Visible chinese human functional near-infrared spectroscopy Monte Carlo simulation head model spatial sensitivity distribution Journal of Innovative Optical Health Sciences
2015, 8(5): 1550024
本文在全面比较了各类光电器件相对光谱灵敏度S(λ)r的基础上,设计了用热释电探测器作参考基准,用积分球作单色光辐射接收系统的S(λ)r测量系统.由于设计上的优点,这一系统大大减少了入射辐射的偏振性,不均匀性,探测器的温漂和杂散辐射等因素带来的误差.
光电探测器 热释电探测器 相对光谱灵敏度
