共查询到18条相似文献,搜索用时 125 毫秒
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本文提出了一种在轨迹成型法加工光学零件磨床上实现脆性材料超精密磨削的微进给电控装置。试验表明,在轨迹成型法加工光学零件磨床上应用本装置对光学透镜进行磨削后,工件表面粗糙度可达Ra=0.02μm,能够达到光学零件精磨的粗糙度要求。 相似文献
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计算机控制光学表面成形法初值的确定 总被引:1,自引:0,他引:1
介绍了计算机控制光学表面成形法的原理,分析了几种非球面度的测量方法,研究了非球面度的不同计算方法对采用计算机控制光学表面成形法加工非球面的影响。从光学零件加工的角度对计算机控制光学表面成形法初值的确定进行了探讨。 相似文献
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大多数情况,制造要求高的现代化光学和光-电系统的仪器,均需采用非球面光学零件。同时,制造非球面零件的加工方法,特别是成批制造非球面零件的加工方法甚为局限。所以,现在无论是在国内,或是国外,都致力于研究成批制造非球面光学零件(其中也包括聚光透镜)的制作方法。此项研究工作在于成批制造椭圆形聚光镜轴对称凸透镜所用的设备、编制工艺 相似文献
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一种高效率小口径非球面数控抛光方法 总被引:4,自引:1,他引:3
自主设计研制的非球面数控抛光机采用气囊式抛光工具,可抛光100mm以下的非球面光学零件,针对口径35mm凹非球面透镜(顶点曲率半径R=-108.14mm的双曲面),研究了非球面的抛光工艺,并确定了相关工艺参数,抛光时间大约为20min,第二次次抛光后元件面形精度达到1.08μm,满足了该零件的使用要求。相对于现有设备美国Precitich公司的Microfinish 300型CNC非球面抛光机,该抛光设备实现了中等精度要求的小口径非球面元件的高效数控抛光。目前该抛光机已经成功地应用于某光学系统非球面零件的批量生产中。 相似文献
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介绍了一种轻质矩形离轴非球面反射镜的加工与检测方法.针对矩形离轴非球面镜这种直角效应的加工难点,提出双摆式加工工艺,并设计改造双摆式加工机床使该方法得以实现.采用该方法加工完成某多光谱仪光学系统中4块矩形离轴非球面反射镜(其中最大尺寸为266 mm×110 mm),最终加工得到的面形精度均优于0.020λ(RMS, @633 mm)的设计指标要求.加工结果表明,用该加工技术既提高了光学加工效率又利于得到较为平滑的面形质量. 相似文献
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Ryoichi Kuwano Toshihiko Koga Tsuyoshi Tokunaga Toshitaka Wakayama Yukitoshi Otani Nobuyuki Fujii 《Optical Review》2012,19(2):98-102
In this study, a method for generating ring intensity distribution at a refraction-type lens with an aspheric element was
proposed, and the beam shaping optical element was finished using only ultra-precision cutting. The shape of the optical element
and its irradiance pattern were determined from numerical calculation based on its geometrical and physical optics. An ultra-precision
lathe was employed to fabricate beam shaping optical elements, and acrylic resin was used as the material. The transmittance
of an optical element (a rotationally symmetrical body) with an aspheric surface fabricated using a single-crystal diamond
tool was over 98%, and its surface roughness was 9.6 nm Ra. The method enabled the formation of a circular melting zone on
a piece of stainless steel with a thickness of 300 μm through pulse YAG laser (λ 1:06 μm) processing such that the average radius was 610 μm and the width was 100–200 μm. Circular processing using a ring
beam shaping optical element can be realized by single-pulse beam irradiation without beam scanning. 相似文献
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In view of the fact that methods for calculating asphericity of optical aspheric surface are nonuniform, a novel definition method named least maximal error method is proposed on the basis of an analysis of the common calculating methods. It fully unifies the asphericity calculation for conicoid and high-order aspheric surface. It finds the best-fitting spherical surface, notes the maximum deviation between aspheric surface and the best-fitting spherical surface minimum, and this maximum deviation is defined as the maximal asphericity of aspheric surface. The theory of the definition method and some calculation examples are put forward. The method is suitable for computer programming and its result is accurate. 相似文献
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提出了一种基于非球面固定校正元件的椭球形窗口光学系统设计方法。结合广义科丁顿公式及几何光学原理,推导出非球面校正元件的像散表达式,在此基础上,以消像散和正弦条件作为非球面校正元件像差评价参数,采用最小二乘法拟合出满足消像散及彗差的非球面面形方程。并建立以泽尼克(Zernike)多项式特殊优化函数取代传统的光学系统评价函数,克服了采用传统光学设计方法设计椭球形窗口光学系统时系统评价函数收敛缓慢的问题。成像光学系统设计时通过比对不同材料匹配实现了光学系统的无热化。给出了完整的椭球形窗口光学系统的设计,设计结果表明,系统的调制传递函数在整个扫描视场范围内接近衍射极限。 相似文献