Ms. Nana Ma Profile

Nana Ma

at XIOPM CAS

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Publications (3)

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Proceedings Article | 12 March 2021 Paper

Research on precision measurement and assembly technology of Fery prism

Xihong Fu, Libo Li, Nana Ma, Xiaoquan Chou, Shifa Kang, Hua Li

Proceedings Volume 11763, 1176304 (2021) https://doi.org/10.1117/12.2584980

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From the special structure, processing technology and function of Fery prism in spectral imager, and the structural design features of a certain research spectral imager project, an assembly measurement method based on CMM, PSM and high precision rotating device is proposed, which combines the principles of space measurement, point source collimation and 3D mathematical modeling, the on-line inspection and alignment technology of Fery prism assembly are studied. Firstly, the key parameters of a single curved prism, such as curvature radius of surface, spherical coordinates, deflection angle of optical axis and off-axis are measured by CMM. Secondly, the Fery prism assembly is assembled by CMM, PSM and high precision rotating device. The space coordinates between the components are measured by CMM, and the position of the Spherical Center and the deflection angle are precisely determined by point source microscope. Finally, the actual assembly effect of the Fery Prism Assembly is reappeared through the data processing of the computer software, and the directional offset between the Fery prism assembly and the theoretical model is given, the precision assembly of Fery prism aseembly is completed by azimuth rotation and trimming mat processing. It provides a new technology method for on-line precision assembly of Fery prism module in Spectral Imager, which has strong operability and high measurement precision, and is suitable for precision detection and assembly of Fery prism module of different sizes.

Proceedings Article | 5 November 2020 Paper

Research on technology of measuring and correcting the optical axis deviation of high-order aspheric lens

Xihong Fu, Shifa Kang, Yu Lei, Hua Li, Peng Wang, Nana Ma, Qian Dang

Proceedings Volume 11568, 1156806 (2020) https://doi.org/10.1117/12.2574922

KEYWORDS: Aspheric lenses, Surface finishing, Geometrical optics, Spherical lenses, Mathematical modeling, Polishing, Confocal microscopy, Image processing, Sensors, Measurement devices

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On the basis of optical theory, the mathematical model of axisymmetric high-order aspherical curve and the curve characteristic parameters related to the locus of aspherical surface are summarized. The non-contact precise measurement and correction of the central deviation of axisymmetric high-order aspherical lens based on autocollimated centering principle and spectral confocal displacement sensing technology are introduced. The methods of measuring the center deviation of aspheric lens with concave and convex surfaces are given. The aspheric measuring device of Trioptics double optical path center deviation measuring instrument is used to measure the axisymmetric high-order aspheric lens, Through several measurements and modifications, the final results meet the requirements of the whole optical system for the optical axis deviation of the axisymmetric high-order aspheric lens. The technology of measuring and correcting the center deviation of high-order aspheric lens with axial symmetry introduced in the paper has high non-contact measuring accuracy, which can guide the adjustment amount and position direction of the coincidence of the axis of symmetry and the axis of mechanical rotation of aspheric lens. It can be widely used in the process of on-line processing, testing and systematic adjustment of aspheric lens and aspheric mirror with different apertures. While ensuring the accuracy of aspheric surface, it can improve the quality of finish grinding process, save a lot of time for polishing process, and play a guiding role in its processing and manufacturing process and high-precision system installation, so as to greatly improve the processing efficiency of axisymmetric high-order aspheric surface and the final optical system installation and adjustment accuracy.

Proceedings Article | 12 March 2020 Paper

Research on measurement optical axis eccentricity and fitting method of aspheric mirror

Xi hong Fu, Shuo Li, Li Xue, Shi-fa Kang, Xiang-ke Zheng, Na-na Ma, Qian Dang

Proceedings Volume 11439, 114391O (2020) https://doi.org/10.1117/12.2550273

KEYWORDS: Mirrors, Aspheric reflectors, Aspheric optics, Diamond turning, Reflectors, Optical testing, Optical fabrication, Spherical lenses, Aspheric lenses, Error analysis

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A method to measurement of optical axis eccentricity and fitting about the aspheric mirror with the high-precision three-coordinate measuring machine(CMM) is presented. By establishing 2d/3d measurement coordinate system, The axis of fitting of the cylinder is selected according to the machining and assembly reference of aspheric mirror, Generating a number of concentric circles automatic measurement strategies, And make the points on each equal circumference, The probe head of the CMM is sampled on the surface of the measured aspheric mirror according to the measured strategy path to obtain the point coordinates of the distance of the reference axis, the measured surface is fitted to obtain the eccentricity of the aspheric mirror optical axis. Hyperboloid concave mirror to make use of the proposed method in the practical testing, the results show the actual processing of eccentricity is 0.0190mm, the standard deviation of 3.6×10^-4mm, to meet the requirements of the design of eccentricity is less than or equal to 0.02mm.And testing the high precision centering lathe cutting machine frame fixed axis aspheric reflector components, the data indicators meet the requirements of assembly process. The accuracy of this method is high, and the traditional measuring method is easy to be affected by the precision of the tooling and easy to scratch the mirror. With large work surface, large caliber, back light weight loss (special-shaped structure) of aspheric mirrors optical axis eccentricity detection, not only suitable for different aperture aspheric mirrors the processing quality of qualified determination, but also in the machining, high precision of aspheric mirrors system with adjustable guiding role and effectively promote R-C spherical reflector optical system assembly accuracy and efficiency.

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