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高分辨率可视穿刺针光学系统的设计与研制 被引量:1
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作者 陈新华 罗宗平 +2 位作者 杨惠林 赵知诚 沈为民 《中国光学》 EI CAS CSCD 北大核心 2021年第5期1162-1168,共7页
为了实现穿刺过程中的精准定位,设计研制了一款视场角为90°,焦距为0.67 mm的高分辨率可视穿刺针光学系统。为使光学系统的光轴垂直于穿刺针的倾斜刃面,利用反射棱镜对光束进行转折,实现45°视向角。光学系统采用反远结构,并对... 为了实现穿刺过程中的精准定位,设计研制了一款视场角为90°,焦距为0.67 mm的高分辨率可视穿刺针光学系统。为使光学系统的光轴垂直于穿刺针的倾斜刃面,利用反射棱镜对光束进行转折,实现45°视向角。光学系统采用反远结构,并对初始结构参数的计算公式进行推导。经过优化设计后,系统成像质量接近衍射极限,最大光学元件尺寸小于1.5 mm。利用研制的光学系统和微型CMOS图像传感器,装配完成了一款直径为4 mm的可视穿刺针。对该可视穿刺针分别进行调制传递函数(MTF)测试和成像试验,测试结果表明,研制的光学系统具有较好的成像质量,物方分辨率优于18.03 lp/mm,能够实现清晰成像。 展开更多
关键词 可视穿刺针 反远系统 视向角 调制传递函数
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背投电视的光学系统设计 被引量:1
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作者 张向辉 郝沛明 +1 位作者 刘玉 何宗平 《同济大学学报(自然科学版)》 EI CAS CSCD 北大核心 2003年第10期1247-1250,共4页
根据背投电视使用的技术指标要求 ,设计出了大视场、高分辨率和长工作距离的光学系统 ,对背投电视的光学系统设计方法进行了初步的理论分析 .选用可以增大后工作距离的反远距光学系统 ,对光学系统进行复杂化 ,采用高折射率玻璃、厚透镜... 根据背投电视使用的技术指标要求 ,设计出了大视场、高分辨率和长工作距离的光学系统 ,对背投电视的光学系统设计方法进行了初步的理论分析 .选用可以增大后工作距离的反远距光学系统 ,对光学系统进行复杂化 ,采用高折射率玻璃、厚透镜和非球面等方法 ,有效地解决了背投电视大视场与高成像质量等各种技术指标要求 .最后通过光学系统的优化设计 ,给出光学系统设计的最佳结果 ,即评价像质的各种像差曲线 ,从设计结果可以看出 。 展开更多
关键词 背投电视 距光学系统 像差 光学设计
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A Fresnel Reflection-Based Optical Fiber Sensor System for Remote Refractive Index Measurement Using an OTDR 被引量:4
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作者 Jianying Yuan Chunliu Zhao +3 位作者 Manping Ye Juan Kang Zaixuan Zhang Shangzhong Jin 《Photonic Sensors》 SCIE EI CAS 2014年第1期48-52,共5页
In this paper, we propose a Fresnel reflection-based optical fiber sensor system for remote refractive index measurement using the optical time domain reflectometry technique as an interrogation method. The surroundin... In this paper, we propose a Fresnel reflection-based optical fiber sensor system for remote refractive index measurement using the optical time domain reflectometry technique as an interrogation method. The surrounding refractive index from a long distance away can be measured easily by using this sensor system, which operates based on testing the Fresnel reflection intensity from the fiber-sample interface. This system is a simple configuration, which is easy to handle. Experimental results showed that the range of this measurement could reach about 100.8km, and the refractive index sensitivities were from 38.71 dB/RIU to 304.89 dB/RIU in the refractive index (RI) range from 1.3486 to 1.4525. 展开更多
关键词 Fresnel reflection optical fiber sensor remote measurement OTDR
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Field scanner design for MUSTANG of the Green Bank Telescope
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作者 CHENG JingQuan LI Yang +1 位作者 LI XinNan MASON Brian 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第11期2091-2096,共6页
MUSTANG (Multiplex SQUID TES Array at Ninety GHz) is a bolometer camera for the Green Bank Telescope (GBT) working at a frequency of 90 GHz.The detector has a field of view of 40 arcsec.To cancel out random emission c... MUSTANG (Multiplex SQUID TES Array at Ninety GHz) is a bolometer camera for the Green Bank Telescope (GBT) working at a frequency of 90 GHz.The detector has a field of view of 40 arcsec.To cancel out random emission change from atmosphere and other sources,requires a fast scanning reflecting system with a few arcminute ranges.In this paper,the aberrations of an off-axis system are reviewed.The condition for an optimized system is provided.In an optimized system,as additional image transfer mirrors are introduced,new aberrations of the off-axis system may be reintroduced,resulting in a limited field of view.In this paper,different scanning mirror arrangements for the GBT system are analyzed through the ray tracing analysis.These include using the subreflector as the scanning mirror,chopping a flat mirror and transferring image with an ellipse mirror,and chopping a flat mirror and transferring image with a pair of face-to-face paraboloid mirrors.The system analysis shows that chopping a flat mirror and using a well aligned pair of paraboloids can generate the required field of view for the MUSTANG detector system,while other systems all suffer from larger off-axis aberrations added by the system modification.The spot diagrams of the well aligned pair of paraboloids produced are only about one Airy disk size within a scanning angle of about 3 arcmin. 展开更多
关键词 antenna optics OFF-AXIS linear astigmatism COMA reflector scanner
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