共查询到16条相似文献,搜索用时 950 毫秒
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无光焦度校正板在光学像差校正中具有重要的作用。为校正大口径离轴抛物面的轴外像差,根据离轴抛物面式平行光管的设计特点,提出了一种用偏置于离轴抛物面镜之后的无光焦度校正板以校正其轴外像差的新结构。根据三级像差理论,分析并进一步推导了大口径离轴抛物面的单色像差分布系数,推导出偏置无光焦度校正板与离轴抛物面的空间几何关系,得出了计算偏置无光焦度校正板初始结构的方法。经过实例验证,由此方法计算出的初始结构参数正确,可有效提高优化设计的效率,同时,此结构能够以相对较小的口径校正离轴抛物面的轴外像差。 相似文献
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无光焦度校正板自身无色差和像面弯曲,并具有弯曲PW和光焦度φ11及φ12等变数,为光学系统的像差校正提供了很大的方便。以系统通光孔径Φ=300mm,相对孔径A=1/2,光阑位置lp2/f=-0.75,主镜为球面反射镜为例,设计了一种带有无光焦度校正板且光阑在主反射镜前的牛顿光学系统。通过对光学系统进行光线计算、像差分析和优化,得到校正板透镜最佳光焦度φ11=5,优化后的轴上点波前像差W=0.0001λ。 相似文献
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《中国光学与应用光学文摘》2005,(1)
TH703 2005010033 双透镜无光焦度校正板和单一反射镜的研究=Study of an optical system with a two-lens null corrector and a single reflector[刊,中]/何宗平(同济大学非球面光学实验室.上海(200433)),赵文才…∥光子学报.-2004,33(3).- 346-349 对双透镜无光焦度校正板和单一反射镜组成的光学系统进行了研究,利用三级像差理论分析了消像差条件, 并得出了一组被证明是正确的公式。根据该公式可以求 相似文献
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《中国光学与应用光学文摘》2006,(3)
O435.2 2006031869双贴合无光焦度校正板在主反射镜前的两镜系统的像差特性=Aberration characteristics of a two-mirror systemwith a two-lens zero-power corrector placed before the pri-mary mirror[刊,中]/何宗平(合肥运涛光电科技有限公司.安徽,合肥(230031)) ,胡明勇…∥量子电子学报.—2006 ,23(1) .—31-36讨论了双贴合无光焦度校正板放在主镜前的双反射球面系统,根据像差理论分析了消像差的条件,研究了系统中各种参数的变化对系统高级残余像差的影响。结果表明主镜的相对孔径越大,系统的残余像差增加;正透镜在前的校正板结构… 相似文献
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为了校正大扫描视场机载共形窗口引入的像差,提出一种基于固定校正板和透镜阵列的静态校正方法。首先使用固定校正板校正静态像差;然后在像面前安置固定的透镜阵列,利用透镜阵列中的各个透镜单元分别校正不同扫描角度的动态像差;最后基于所提方法设计应用在机载共形光学系统中的像差校正器。设计结果表明,所提方法在±42°的扫描视场范围内能够良好地校正共形窗口引入的像差。与其他动态或静态校正方法相比,所提方法可以实现大扫描视场机载共形光学系统像差的校正,同时降低机载共形光学系统的质量,提高系统的稳定性。 相似文献
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A chromatic corrector with two refractive–diffractive hybrid elements is designed over a reasonable wide field-of-view of 7° to correct the chromatic aberrations of human eye. We investigate the performance of the corrector using several optical criteria in a comparison with the chromatic corrector with single refractive–diffractive element. Both the correctors can correct the longitudinal chromatic aberration (LCA) fairly. It is demonstrated that the chromatic corrector with single element introduces serious eccentric transverse chromatic aberration (TCA), which deteriorates the image quality at the edge field-of-view. On using the chromatic corrector with two refractive–diffractive elements, not only the LCA but also the TCA can be corrected very well. The designed chromatic corrector can be used to improve the retinal image quality and has potential application in the design of visual instruments. 相似文献
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《中国光学快报(英文版)》2020,(7)
Traditional optical domes are spherical, which have a large air resistance coefficient. In order to reduce the coefficient of air resistance, conformal optical technology was proposed, which used a streamlined design of the outer surface of the dome. However, conformal domes generate dynamic aberrations varying significantly with look angles in the field of regard(FOR). Thus, correcting the dynamic aberrations is the core task of conformal optics. This Letter presented a correcting method of dynamic aberrations based on the diffraction surface and anamorphic asphere surface. This method is derived from the arch corrector and can only be used on the Roll-Nod gimbal. For the seeker with a Roll-Nod gimbal, the arch corrector is replaced with a diffractive surface superimposed on the inner surface of the conformal dome. To correct astigmatism, which is the main aberration that needs to be corrected, anamorphic asphere surfaces are used in the imaging system. Compared with the arch corrector, this method can reduce the size of the correction element while retaining sufficient design freedom. Design results show that this method can well correct the dynamic aberrations in a larger FOR. With a simpler form in structure, this method can improve the reliability of conformal optical systems and promote the application of conformal optical technology. 相似文献
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To make it easier for designing Schmidt optical systems, based on wavefront aberration functions, a mathematical model of the corrector plate aspheric surfaces varies as a function of defocusing amount is established. It corrects not only the third-order spherical aberration, but also the 5th-order spherical aberration for the system. A series of Schmidt optical systems were designed as examples to evaluate the mathematical model of the aspherics. Results show that the mathematical model is precisely in fitting the needed shape of the corrector, and can be used for the systems for quick F ratio and large aperture. A mathematical model for reflective correctors shape is also established. 相似文献
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The aberration theory of grating systems is extended from one-dimension to two-dimension extended source. In deriving the aberration formulae, the concept that pupil in the meridional plane is separate from the one in the sagittal plane is applied and the principal ray is determined by a linear equation. Using the Seidel aberration for reference, the aberrations are classified into seven types according to the geometrical characteristics. The numerical simulation of imaging of one model optical systems is made with the aberration formulae and exact ray tracing to examine the accuracy of the aberration formulae. 相似文献