自聚焦透镜的薄透镜等效系统

本文分析了自聚焦透镜的成象特性,提出了用薄透镜系统等效自聚焦透镜的方法,这种方法给用几何作图法和解析法求解物象关系带来了很大方便。     

一种新型光学透镜—自聚焦棒透镜

本文对自聚焦棒透镜的成像特性进行了分析,简单介绍了该种透镜的制作工艺及折射率分布测试手段,并叙述了该透镜的应用及国内外对自聚焦棒透镜的研究发展状况。     

自聚焦透镜成象矩阵公式的近似性

本文从光线方程出发,对自聚焦透镜成象矩阵公式做了详细推导,由推导过程即可看出该公式的近似性及其应用范围,纠正了一些文献上认为该公式可应用于非高斯光学成象的看法。     

用于运动目标探测的多通道成象系统

本文提出了一种采用自聚焦(GRIN)透镜阵列对运动目标进行探测的多通道光学成象系统.与单孔径成象系统比较,多通道成象系统具有更宽的视场和更高的运动敏感度,使之更适合于对运动目标的捕获、跟踪以及对运动量的测定.本文根据复眼的视觉机制和自聚焦透镜的成象原理,对运动目标进行了成象与测定实验.此外,初步介绍了为提高图象分辨率而采用的并行多通道处理技术.     

自聚焦透镜组合光学系统的光线传输分析

本文导出了自聚焦透镜组合光学系统的光线传输方程,讨论了光线传输与自聚焦透焦透镜参数关系。对几种典型自聚焦透镜组合进行了计算、从而估计自聚焦透镜参数选择。     

自聚焦透镜列阵及其应用

介绍自聚焦透镜列阵的成像原理、制作工艺及设计方法,并就应用前景作一简要分析。     

基于光探针技术的自聚焦透镜光斑测量方法

以扫描探针显微理论为基础,讨论了基于光学纤维探针技术的自聚焦透镜光斑测量方法,介绍了实验系统的构成和测量原理、光学探针的制作和软件控制技术,并且以日本产NSG自聚焦透镜为样品进行了光斑测量和分析.所得结果对于评价自聚焦透镜的成像性能具有重要意义.     

一维自聚焦透镜及其应用

利用平板自聚焦透镜材料进行离子交换,制成一维自聚焦透镜.分析了平板自聚焦透镜的离子交换原理和折射率分布形成过程,测量了不同厚度时,折射率分布常量A的值.介绍了透镜的应用,并用一维自聚焦透镜制成小型半导体激光器耦合器件.     

自聚焦透镜列阵重叠度的研究

本文讨论了自聚焦透镜列阵重叠度,分析了重叠度对分辨率及照度分布的影响,并对一系列单根自聚焦透镜和两列自聚焦透镜列阵作了测量,得到了制造自聚焦透镜列阵的一个重要依据.实验中总结出照度分布不均匀规律的经验公式.     

自聚焦透镜列阵的设计原理与制造

讨论了自聚焦透镜及其列阵成像的规律.根据所需列阵的共轭距离,分辨率等确定单根自聚焦透镜的几何尺寸和光学参数,设计出复印机用的自聚焦透镜列阵.最后,对列阵的制造作了初步介绍.     

Optical Learning Neural Network Using a Selfoc Microlens Array for Pattern Recognition

An optical system for learning neural networks with a 2-D architecture was constructed using a Selfoc microlens array. Using this system, we achieved pattern recognition of typed alphabet characters detected directly with a CCD camera. The system learned 4 characters according to a random search algorithm in order to avoid the difficulties and the costs of calculations of learning signals, optical alignments and addressing to the device which display the weight tensors.     

单镜头反光照相机测光范围与测光光学系统设计计算

本文分析了单镜头反光照相机测光范围与测光光学系统的关系，建立了测光系统计算模型，推导出了测光权重计算方法与公式。并通过光路追迹，编制计算机程序，给出了各种测光范围和权重的计算实例。     

Fundamental studies on laser radiation therapy: dispersion of a laser beam passing through optical fibres

For laser internal therapy in medical applications, optical fibres are required to propagate the laser beam. The far-field pattern of the laser beam at the exit face of the optical fibre is studied using a multimode step-index fibre and a graded index Selfoc fibre. The degree of dispersion, or the output angular distribution, of the beam passing through the Selfoc fibre is much smaller than that passing through the multimode step-index fibre. Consequently, the energy density in the far-field pattern of the beam passing through the Selfoc fibre is very much larger than that for the beam passing through the multimode step-index fibre. It is concluded that the Selfoc fibre is more effective in laser internal therapy.     

Ultrashort optical pulse generation from microwave modulated AlGaAs diode laser with selfoc rod resonator

Experimental studies were carried out to demonstrate the practical feasibility for generating high-bit-rate ultrashort optical pulses from RF modulated AlGaAs diode lasers using compact Selfoc rod lens external resonators mounted on the brass heat sink for the diode laser. Measured pulse width was found to be ? 37 ps with a lorentzian profile at modulation frequencies of 1.4 and 3.6 GHz depending on the length of the Selfoc rod lens. Evidence for regeneratively amplified pulse oscillation was also obtained at 3.6 GHz repetition rate with this external cavity configuration.     

正六边形自聚焦透镜折射率分布研究

针对离子交换实验的定源扩散,提出了一种求解正六边形自聚焦透镜折射率分布的理论模型.并在此基础上采用分离变量法和坐标变换,求得了正六边形自聚焦透镜折射率分布的解析解.通过Matlab对该解析解进行了模拟比较,定性、定量地证明了其正确性.     

LFI法测量半透明油的折射率

LFI方法曾被用来测量大直径光纤的折射率.用一半盛油一半为空气的毛细管代替光纤,并用聚焦的条形光束照射毛细管,空气与油的干涉条纹同时产生.根据空气的条纹可以确定参数b,根据一组已知折射率的标准样品可确定另一参数c,同时可以建立标准液体最外条纹的偏折角与折射率的标准曲线.对于未知折射率的样品,一旦测量出其最外条纹的偏折角,从标准曲线上就可以读出其折射率.实测了一组半透明油的折射率,其结果与阿贝折射仪测量结果接近.     

Calibration and correction of lens distortion for two-dimensional digital speckle correlation measurement

Lens distortion practically presents in optical imaging system using in two-dimensional digital speckle correlation measurement (2D-DSCM) system, and gives rise to additional errors in the displacement and strain measurement. Camera calibration procedure is performed to obtain the coefficients of radial distortion and tangential distortion. The corrected displacement fields can be calculated using the distortion coefficient. The influence of distortion on displacement and strain measurement errors in experiment is further discussed. The three-point bending test result shows that the camera lens calibration method can effectively eliminate the effect of lens distortion and improve displacement and strain measurement accuracy.     

Fractional Talbot effect in a Selfoc gradient-index lens

The fractional Talbot effect is demonstrated inside a standard 0.25-pitch Selfoc gradient-index lens under uniform illumination. Comparisons with theoretical expressions of positions and magnification of fractional Talbot images are given.