渐变眼镜片的设计及评价

介绍了渐变镜片的基本结构及工作原理,给出其基于狄利克雷条件的软设计方法。根据曲面的微分几何理论,对渐变镜片性能进行分析评价。举例设计了光焦度增量为2 50m-1的几种渐变镜片。通过对其球面度和柱面度的数值分析,指出镜片子午线光焦度渐增方式的选取明显地影响镜片球面度和柱面度的大小和分布,由此,可设计满足不同使用要求的渐变镜片。     

一种新型非球面数控抛光方法的研究

介绍了一种新型的非球面抛光方法———进动抛光,这种方法有着其它方法所不具备的优点———抛光头与非球面很好的接触,因而使仿真结果与实际更接近。对进动抛光原理进行了详细的论述,用数学建模的方法计算了非球面抛光过程中的非球面度、去除函数及驻留函数,通过计算机模拟出了相应的特性曲线。     

简洁轻薄手机镜头的光学设计

设计了一款简洁轻薄的手机镜头,使用4片非球面塑料材料和1片红外玻璃滤波片,塑料非球面材料分别是E48R,POLYCRA,折射率和阿贝数分别是1．53、58;1．59、29．9。用ZEMAX软件对镜头进行了优化设计,对优化后的结构进行了分析,设计全视场角和相对孔径分别为67°和1／2．8,系统总长为4mm,焦距3．5mm,后截距为0．5mm,使用1／4inchCMOS作为成像接收器件,全视场MTF值在295lp／mm处接近0．2,畸变小于2％,可应用于超薄手机设计中。     

Shack-Hartmann波前传感器非零位在轴检测离轴非球面反射镜

在离轴非球面反射镜研磨后期和粗抛光阶段,被测反射镜面形与理想面形存在着较大的偏差,表面反射率较低,采用干涉测量会因局部区域干涉条纹过密或条纹对比度过低,造成普通干涉仪无法进行全口径测量,而普通接触式轮廓仪测量精度此时已经不能满足加工要求。鉴于Shack-Hartmann波前传感器较大的动态范围和较高的测量精度,提出了采用Shack-Hartmann波前传感器非零位在轴检测离轴非球面面形,研究了该方法的检测原理并搭建了检测系统,分析了系统误差来源,并制作了用于在轴检测离轴非球面的参考波前,对两个不同加工精度的离轴非球面反射镜进行了测量,并与干涉仪的测量结果进行了对比。对比结果表明,Shack-Hartmann波前传感器的测量结果是正确可靠的,并且可以弥补轮廓仪测量和干涉仪测量的不足,从而证明了采用Shack-Hartmann波前传感器在轴检测离轴非球面的可行性和正确性。     

双胶合透镜法检测大相对孔径凸非球面透镜

大相对孔径凸非球面的检测一直是非球面制造的难点.本文结合两片大相对孔径凸椭球面透镜的检测,提出采用同种材料胶合的检测方法,并基于该检测方法加工得到了相对孔径分别为2.7和2的两块凸椭球面透镜.经检测,两块非球面透镜检测系统的最终波像差均方根值都优于1/30λ(λ=632.8nm),在实际光学系统应用中,系统的分辨率和弥散斑大小均满足系统的指标要求.产品的使用情况验证了本文采用的同种材料胶合的检测方法在理论和实践上是可行的,与传统的光学补偿法检测大非球面度、高陡度非球面相比,本文采用的胶合透镜法极大地简化了检测系统结构,降低了系统的装调难度,是一种有效的高准确度凸非球面检测方法.     

Simple 40° head-mounted display

A simple 40° eyepiece matched with the micro-display device is designed. It consists of two elements, including a binary surface and an aspheric surface. With satisfactory performance, the eyepiece can be used in display with a SXGA resolution sized 1.1 inches diagonal. Because no other relay system is needed, the HMD system could be made more compact with much less weight.     

两非球面反射镜非扫描式软X射线投影光刻系统

提出了一个软Ｘ射线投影光刻，缩比为６：１，由两非球面镜构成的光学系统。该系统在波长为１３ｎｍ时，可获得Φ３０ｍｍ的平像场和优于０．１μｍ的光刻线条分辨率，其最大畸变为０．４％。     

Beam Shaping Optics for YAG Laser Processing Fabricated by Computerized Numerical Control Lathe

A method for a beam shaping optics is proposed to convert a laser beam profile into arbitrary required intensity distribution. Surface profile of the beam shaping optics is designed by using Snell's law to convert the required intensity distribution at the beam irradiation plane from the input intensity distribution. A computerized numerical control (CNC) lathe is employed to fabricate the beam shaping optics, and acrylic resin is used for the material. The acrylic resin plate is cut by a ball type of grinding wheel tool consisted on diamond powder and polished by a cone type felt buff with alumina ceramics powder. The CNC lathe is powerful tool to control the position of these tools. The fabricated beam shaping optics is aspheric shape with 4 mm of thickness and it works to convert the intensity distribution of multi-mode beam profile with 13 mm of diameter into a flat top cylinder with 1 mm of diameter. A working distance of the beam shaping optics is 60 mm, and its transmittance is over 98%. It succeeds to fabricate uniform melting mark of 0.6 mm diameter on a steel target by the YAG laser process.     

光学非球面透镜在一些光电仪器中的应用

使用非球面零件能大大简化光电仪器的系统，减小仪器的尺寸和重量，因而它得到越来越广泛的应用，介绍了光学非球面透镜在光盘机等光电仪器中的应用。说明了这些仪器中使用非球面透镜的原因，对透镜像质的要求，以及制造非球面透镜的材料。     

Aberration theory of plane‐symmetric grating systems

Aberration theory of plane‐symmetric optical systems of mirror and grating has been developed based on the wavefront aberration method. A toroidal reference wavefront surface is used to define the wavefront aberration. Based on the ray geometry, the coordinate mapping relationships of the ray between the optical element and the incident and aberrated wavefronts are derived using a polynomial‐fit method; this enables the resultant coefficients of the wavefront and the transverse aberration to be kept to the fourth‐order accuracy of the aperture‐ray coordinates. By setting up the transfer equations of the field and aperture rays, the contribution to wavefront aberrations from each mirror and grating can be added to make the aberration calculation of multi‐element systems feasible. The theory is validated by the analytic formulae of the spot diagram.