共查询到18条相似文献,搜索用时 78 毫秒
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没有补偿板的迈克尔逊干涉仪中干涉条纹形状 总被引:2,自引:0,他引:2
本文从垂直入射平面镜M_1、M_2的两束光间的附加光程差和扩展光源时,倾斜线相对于中心光线的相对光程差两方面分析了没有补偿板的迈克尔逊干涉仪的附加光程差,推导出干涉条纹形状方程式,并以实例数据详细讨论了干涉仪动镜移动过程中干涉条纹形状的变化。 相似文献
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为了提高光纤法布里-珀罗传感器的解调精度和效率,利用干涉光谱中的波峰计算出一系列光程差,根据最小二乘法求出该组光程差中方差最小的解作为粗略解调结果,并计算出光谱附加相位;在光谱附加相位基础上进行校正,得到补偿光程差,两者之和为最终解调结果.仿真结果表明,该算法的解调误差在±2.5nm内.光纤法布里-珀罗蓝宝石高温传感实验表明,从室温升到1 000℃时,该算法解调光程差精度为5.4nm,对应温度的精度为±0.36‰F.S.,同等条件下计算速度比FFT-MMSE快400倍,具有计算精度高,计算速度快的优点. 相似文献
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利用光栅衍射法测量了NaCl溶液的折射率,并分析了容器壁厚度引起的附加光程对折射率的影响.采用折射率修正公式运用一级衍射得到的溶液的折射率更可靠. 相似文献
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用迈克尔逊干涉仪做物理光学实验 ,教学中出现了在常规实验中不能出现的奇异现象 ,本文通过分析仪器中的附加光程差 ,对干涉图样形成的原因作了定性解释 ,并得出结论。 相似文献
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迈克耳孙干涉仪中附加光程差对干涉图样影响的讨论 总被引:8,自引:1,他引:7
用迈克耳孙干涉仪做物理光学实验,教学中出现了在常规中不能出现的奇异现象,本通过分析仪器中的附加光程差,对干涉图样形成的原因作了定性解释,并得出结论。 相似文献
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角锥棱镜的误差引起的反射光束相位误差分析 总被引:2,自引:0,他引:2
提出一种计算角锥棱镜反射光束相位误差的方法.光束通过非理想角锥棱镜时会引入一个附加光程差,从而改变光束的相位特性和反射光束的传播方向.在小误差近似条件下,采用光线追迹法建立了一个有效的数学模型,计算角锥棱镜的二面角误差和反射面面型误差引起的传输光束的附加相位,并分析了该模型的理论误差.在二面角误差为1",反射面面形光圈数小于0.5的条件下,该模型的数值仿真结果显示角锥附加相位具有高度的中心对称性,附加相位对入射光束引入的相位平均斜率为零,这一特性与误差的种类和大小无关.角锥棱镜的附加相位模型为分析其在应用中给系统带来的误差提供了一个新的方法,有助于指导不同应用场景中所使用角锥棱镜的加工指标要求. 相似文献
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Optical Review - We have realized a novel optical system to form a large aerial image in front of a full-color LED panel that is covered with retro-reflector. The retro-reflector has square... 相似文献
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High-accuracy laser-based optoelectronic motion- and position-measuring systems typically utilize light rays that travel from one optical boundary surface to another to perform motion and/or position measurements. It is not a simple task to accurately determine the equations of these sensor readings in terms of positional/angular motions. This problem is addressed in this paper by application of the analytic skew-ray tracing methodology as computed by the finite-difference methodology. An illustrative example of a motion-measurement system and comparison of the position-sensing detector (PSD) readings are given to validate the proposed methodology. It is shown that the proposed methodology can provide accurate expressions of PSD readings. It is also shown that the performance of a corner-cube retro-reflector is better than a cat's eye retro-reflector in positional/angular motion measurement systems. 相似文献
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Calculations have been done for the modulation transfer function of a superresolution optical disk with a combination of optical
path filtering and saturable absorption techniques. The results reveal that optical path filtering alone can only equalize,
to a certain degree, the spatial frequency response of the opticaldisk system, but it can not attain any response beyond the
cutoff frequency. With an additional saturable absorption layer in-between the substrate and the information layer, it is
found that the optical response both under and beyond the cutoff frequency can be greatly improved. 相似文献
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We proposed and demonstrated an optical delay line composed of all reflective components for long-range scanning without walk-off problem. The optical delay line consists of a retro-reflector, an inclined reflection mirror and a scanning mirror. The size of the optical delay line is within 2 cm × 2 cm and the scanning range can reach 2.9 mm when the beam is incident at the pivot of the scanning mirror and the vibration angle of the scanning mirror is 9.6°. The scanning range can be further increased when the pivot of the scanning mirror is laterally deviated from the incident beam. The optical delay line possesses the advantages that it is compact, easy to fabricate and can perform rapid scanning in large scanning range without walk-off problem. The optical delay line was demonstrated with a low-coherence reflectometer where the scanning rate was 400 Hz. A higher scanning rate can be achieved when a scanning component with higher scanning rate is applied. 相似文献
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Calculation of distribution of effective reflection area for space-borne laser retro-reflector array
HU Jingfu LI Xin YANG Fumin CHEN Wanzhen & ZHANG Zhongping Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai China 《中国科学G辑(英文版)》2004,47(3):330-337
~~Calculation of distribution of effective reflection area for space-borne laser retro-reflector array~~ 相似文献
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