光学高温计     

马国荣 《中国教育技术装备》2005,(9):20-21

阐述光学高温计测温原理、灯丝隐灭式光学高温计制作的参数选择以及光学高温计显示温度与实际温度修正方法。  相似文献   

Small-Group Interview-Based Discussions About Diffused Shadow     

Haim Eshach 《Journal of Science Education and Technology》2003,12(3):261-275

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准相位匹配光参变振荡非均匀周期间隔     

徐海斌 《湖州师范学院学报》2007,29(2):50-53

利用光参变振荡中的能量守恒和波矢匹配,同时考虑了铌酸锂晶片的热胀冷缩效应,通过数值计算得到在0.980μm、1.064μm和1.180μm抽运光作用下,固定温度调谐区间内(330~500K),铌酸锂晶片极化周期与信号光、闲置光的温度调谐宽度关系.研究表明,在各个不同抽运光作用下,信号光和闲置光的温度调谐宽度随铌酸锂晶片极化周期的增加而出现非线性的增大.由此得到相关结论,为了在铌酸锂晶片透光范围内实现连续可调,基于准相位匹配光参变振荡的极化周期具有非均匀间隔设计的特点.  相似文献   

Measurement of Rotatory Optics Element in Tensor Dielectric Matrix for Rotatory Optical Fiber     

刘敬浩张晓帆  李华舟鲍振武 《天津大学学报(英文版)》2005,11(2):115-118

The rotatory optics element in the tensor dielectric coefficient matrix is an important parameter for analyzing and calculating a rotatory optical fiber by electromagnetic theory. But the measurement of rotatory optics element is difficult for the rotatory optical fiber. A simple principle and method for measuring rotatory optics element are put forward in this paper. Firstly by using electromagnetic theory it was demonstrated that the rotatory optics element has a simple linear relation with the rotatory angle, and then the rotatory optics element has a simple linear relation with the magnetic field strength (or bias current in the helix coil) . Secondly a measurement system for the rotatory optics element in the rotatory optical fiber was designed. Using the measurement system the rotatory element can be obtained by measuring the bias current simply.  相似文献   

略论光学实验教学     

晏登扬 《铜仁学院学报》2005,7(3):53-54

在光学实验教学中应注意引导学生变被动学习为主动学习，培养学生独立工作能力，创造生动活泼的教学气氛；引导学生运用基础理论去观察和分析；加强实验结果分析，引导学生注意系统误差的影响；还应鼓励学生提出问题，发表不同看法，多问为什么。  相似文献   

试论信息光学的发展与前景     

袁振鹏 《赣南师范学院学报》1994,(6):38-41

本文综述了信息光学的发展过程，并对信息光学的几个前沿课题的研究前景作出了评价。  相似文献   

研究物体成像规律的一种简便方法     

何雷 《保定师专学报》2001,14(2):24-27

利用函数图象研究光学系统成像规律，对成像规律进行了总结。  相似文献   

Computer simulations as tools for teaching and learning: Using a simulation environment in optics     

Bat-Sheva Eylon  Miky Ronen  Uri Ganiel 《Journal of Science Education and Technology》1996,5(2):93-110

RAY is a learning environment that includes a flexible ray tracing simulation, graphic tools, and task authoring facilities. This study explores RAY's potential to improve optics learning in high school. In study 1, the teacher used RAY as a smart blackboard with a single computer in the classroom to explore, explain, and predict optical phenomena; to introduce concepts; to interpret experiments and to represent theoretical exercises. A comparative study shows a significant effect on the spontaneous and correct use of the model by students in solving problems and a limited effect on conceptual understanding. In study 2 students, guided by written materials used the simulation individually. Students considered in a systematic manner the relationship between image formation and image observation—a major conceputal stumbling stone. They reflected on the problem-solving activity and reformulated explicity their knowledge in the domain. Case studies describe the interplay between the various aspects of the learning process in the development of conceptual understanding. A comparative study shows the importance of three factors to students' understanding of concepts and their ability to use the ray model: the computerized environment (versus written instruction of similar kind); a task design that addresses directly conceptual difficulties; and the explicit reformulation of ideas.  相似文献   

光学信息隐藏综述     

张静娟  史祎诗  司徒国海 《中国科学院大学学报》2006,23(3):289-296

近几年来,光学信息处理系统凭借其高速并行等独特优势,它与信息隐藏的结合成为一个崭新的交叉领域,引起了人们浓厚兴趣。本文围绕用随机相位编码、数字全息术等实现隐藏的技术手段,分析阐释光学信息隐藏的一些主要方法,同时对多重信息和三维信息的隐藏也进行介绍。最后作了简要的展望。  相似文献   

共性技术服务平台与光学产业科技进步     

戴中生 《现代情报》2010,30(4):56-58

本文通过对上饶光学产业的现状分析,指出了影响上饶光学产业创新发展的问题和因素,阐述了建设光学产业共性技术服务平台对上饶市光学产业科技进步的意义,并对共性技术信息服务促进上饶市光学产业科技进步进行了功能分析。  相似文献