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Aspheric Surface Washing Mill
Ultraprecision finishing of micro-aspheric surface by
2010/1/1 In the conventional aspheric polishing method, a rotating micro-soft polishing tool, such as a rubber tool, is used to polish the aspheric surface of the rotating workpiece while loose super abrasives are supplied.
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Investigation on the polishing of aspheric surfaces with a
2020/1/1 Aspheric elements have become essential optical surfaces for modifying optical systems due to their abilities to enhance the imaging quality. In this work, a novel method
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Aspheric surface profile effects analysis in polishing with
2012/10/16 Subsequently, the effects of the process parameters such as radius and size of the ballonet tool on aspheric optical component profile and polishing efficiency are analyzed in
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Integration of Metrology in Grinding and Polishing Processes
2024/9/13 In aspheric polishing, the polishing film is typically softer than the aspheric components, allowing the polishing head and workpiece surface to establish adaptive contact.
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High-efficiency abrasive water jet milling of aspheric RB-SiC surface ...
2023/3/29 The aspherical RB-SiC surface was generated by abrasive water jet milling with a processing path composed of 20 spiral segments. Different milling depths were obtained by
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Novel CNC polishing process for control of form
2002/9/1 We first consider the potential impact of a technology that could deliver polished, accurate aspheric surfaces in a routine and automated manner. We then summarise the technical challenge, and ...
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2022/1/6 The uniformity of material removal can affect the profile accuracy and surface quality of the polished curved surface. In the aspheric surface polishing, the Archimedes spiral
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Large and Middle‐Scale Aperture Aspheric Surfaces
2016/12/16 A complete all-in-one reference to aspheric fabrication and testing for optical applications. This book provides a detailed introduction to the manufacturing and
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Atomic surface induced by novel green chemical mechanical
2024/5/15 A novel approach of robot floating polishing is proposed for aspheric crucibles with a diameter of 810 mm and a height of 580 mm. Using the developed CMP, surface
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Three-Linear-Axis Grinding of Small Aperture Aspheric Surfaces
2019/4/16 Fengzhou Fang. 646 Accesses. 12 Citations. Explore all metrics. Abstract. A novel approach of three-linear-axis ultra-precision grinding with wheel path generation, tool
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Problems of aspheric surface measurement using capacitive ...
technology has become a hot research topic.This paper submits a new method of non-contact measurement of aspheric surface based on the capacitive probe.Taking the eccentric spherical surface as the object of study,the average effect of the ...
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(PDF) Review on Surface Polishing Methods of
2022/5/12 treatment and surface cleaning on alkali halide single crystal. ... a large-diameter off-axis aspheric surface, which is of great ... NGT IBF-450. (b) SCIA mill 150. (c) AFiSy IFS300. (d) AJA SI500.
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Modeling and experiment of surface error for large
2017/8/25 where z is the height coordinate of aspheric surface, x is the rotationradiusofworkpiece,R 0 isthecurvatureradiuswhenx is 0, and e is the eccentricity of aspheric surface. AsshowninFig.1,thevalueofe2 determinestheshapeof conic section. According to aspheric surface equation (Eq. (1)), the slope of the tangent for any point at quadratic ...
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Aspheric Surfaces - Simon Fraser University
2008/2/6 Aspheric Surfaces • Simple optics uses spherical surfaces • Spherical surface is defined by the radius of curvature only • But to correct many aberrations need aspheric surface • Aspheric from Greek: a means not: thus not spherical • Must have curvature different with radius r
获取价格Profile error compensation in ultra-precision grinding of ...
2010/5/1 The experimental results showed that after three compensation grinding cycles the aspheric surface had a profile accuracy of 177 nm (in PV) with a roughness of 1.7 nm (in Ra). The on-machine measurement was in excellent agreement with the off-machine 展开
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Effect of the components of Magnetic Compound Fluid (MCF ...
2020/5/11 Effect of the components of Magnetic Compound Fluid (MCF) slurry on polishing characteristics in aspheric-surface finishing with the doughnut-shaped MCF tool Precision Engineering ( IF 3.6) Pub Date : 2020-05-11, DOI: 10.1016/j.precisioneng.2020.04.021
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A simplified expression for aspheric surface fitting
2017/7/1 The first aspheric surface tested was designed with 3 even order terms as shown in Table 1.The clear aperture diameter is 4.5 mm.In computation, we used 1000 × 1000 sampling grid.The minimum unit size is 4.5 μm × 4.5 μm.On 32-bit Windows 7 system with Intel(R) Core™ i7-3630QM processor, 10 iteration loops were tested.
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Mapping error correction of large off-axis aspheric surface in null ...
2015/12/1 Aspheric surface is widely used in modern optical systems due to its good characteristics. Compared with all-spherical solutions, the case for using aspheric surfaces in optical system provide additional degree of freedom for optical designer, can correct or balance various aberrations independently, deliver superior imaging performance, and have fewer
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aspheric lens manufacturing using profile grinder - Grinding Mill
2013/4/28 Advanced Manufacturing Technology: On-Machine Profile Measuring System for Grinding Surface of Aspheric Lens HOT STONE CRUSHING PLANT » 40TPH - 60TPH Crusher Plant
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Measurement of steep aspheric surfaces using improved two ...
2017/4/6 Zhang, L, Wang, S, Hu, Y Hao, Q 2017, Measurement of steep aspheric surfaces using improved two-wavelength phase-shifting interferometer.在 AK Asundi, H Zhao W Osten (编辑), AOPC 2017: 3D Measurement Technology for Intelligent Manufacturing., 104580Z, Proceedings of SPIE - The International Society for Optical Engineering, 卷 10458, SPIE,
获取价格3D shape measurement of convex aspheric surface using
2020/6/1 Thus, the vertex of the convex aspheric surface exactly coincides with the origin O of the “world” coordinate system. Then, the convex aspheric surface can be tested as in Fig. 3 (b). Horizontal and vertical sinusoidal fringe patterns were projected onto the LCD screen, and the deformed fringes were synchronously recorded by the pinhole ...
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A simplified expression for aspheric surface fitting
2017/7/1 The basic idea for aspheric surface fitting is first to expand the aspheric surface expression into even order polynomials by binomial expansion, and then to combine with existing terms. Through Gram–Schmitt orthogonalization, the newly generated terms are converted to discrete orthogonal polynomials. The least squares method is then used to ...
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Best-fitting sphere of aspheric surface based on spherical ...
2020/5/22 In order to understand the physical meaning of the best-fitting sphere of aspheric surface, based on the optical design idea of the aberration theory, the relationship between the curvature radius of the best-fitting sphere and the spherical aberration for the ...
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A new approach to characterising aspheric surfaces
2010/1/1 In [7] Gugsa and Davies proposed a method to estimate the conic constant for an aspheric micro lens using scanning white light interferometry. From the measured surface an estimate for the vertex radius is found by varying the size of the sampling area of the measured surface. By varying the value of the conic constant k, the best-fit profile of the measured
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Material removal and surface generation mechanisms in ...
2024/1/10 First, RUV-assisted scratch experiments were conducted on aspheric surface of glass ceramics, which exhibited multiple benefits over conventional scratching. These include a reduction in the scratch force by 37.83–44.55% for tangential component and 3.87–28 ...
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Atomic level surface on aspheric quartz crucible with large ...
2024/8/8 Atomic level surface on aspheric quartz crucible with large sizes induced by developed green chemical mechanical polishing with composite rare earth oxides Surfaces and Interfaces ( IF 5.7) Pub Date : 2024-08-08, DOI: 10.1016/j.surfin.2024.104924
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Improving as-built miniature lenses that use many aspheric ...
2021/1/1 Improving as-built miniature lenses that use many aspheric surface coefficients with two desensitizing Optical Engineering ( IF 1.1) Pub Date : 2021-01-01, DOI: 10.1117/1.oe.60.5.051208
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Ultraprecision finishing of micro-aspheric surface by
2010/1/1 The structure and the shape of the ultrasonic two-axis vibrator were designed by using finite element analysis. By analysing the vibration amplitude, the 2nd mode is selected in the axial vibration and the 4th mode is selected in the flexural vibration as shown in Fig. 4. Fig. 5 shows the measured diagram of the amplitude–frequency response in the vibrator fabricated
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Atomic level surface on aspheric quartz crucible with large
2024/9/1 Defects on the inner surface of aspheric crucibles should be removed at a high material removal rate (MRR), and atomic surface is strictly demanded. This is a challenge for chemical mechanical polishing (CMP), because of that CMP is usually applied to flat surface, rather than aspheric surface. Furthermore, traditional CMP normally employs ...
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High-efficiency abrasive water jet milling of aspheric RB-SiC ...
By superimposing Gaussian curves linearly, the surface waviness of superimposed curve was gradually reduced as step-over distance decreased. The surface waviness induced by abrasive water jet milling can be effectively reduced when step-over distance is
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