Research on generation method milling aspheric surface

2021 ◽  
Author(s):  
zhuocheng dai ◽  
Peiji Guo ◽  
Xi Chen
Keyword(s):  
Aspheric Surface

Computer numeric control subaperture aspheric surface polishing—microroughness evaluation

2014 ◽  
Vol 53 (9) ◽  
pp. 092011 ◽  
Author(s):  
Frantisek Prochaska ◽  
Jaroslav Polak ◽  
Ondrej Matousek ◽  
David Tomka
Keyword(s):  
Aspheric Surface ◽  
Surface Polishing ◽  
Computer Numeric Control

Improving as-built miniature lenses that use many aspheric surface coefficients with two desensitizing techniques

2021 ◽  
Vol 60 (05) ◽  
Author(s):  
Leticia Carrión-Higueras ◽  
Arnau Calatayud ◽  
José Sasian
Keyword(s):  
Aspheric Surface

The position shifting of frequency spectrum of Fourier transform in the application of aspheric surface testing

2007 ◽  
Author(s):  
Junmiao Weng ◽  
Yongying Yang ◽  
Dong Liu ◽  
Yibing Shen ◽  
Yongmo Zhuo
Keyword(s):  
Fourier Transform ◽  
Frequency Spectrum ◽  
Aspheric Surface ◽  
Surface Testing

The Application of Adaptive Kalman Filter Technology in Aspheric Surface Machining and Detection

2012 ◽  
Vol 192 ◽  
pp. 42-45
Author(s):  
Xue Chen Zhang ◽  
Guo Hua Cao ◽  
Feng Ming Nie
Keyword(s):  
Random Error ◽  
Simulation Analysis ◽  
Processing Technique ◽  
Second Order ◽  
Recursive Identification ◽  
Surface Element ◽  
Machining Parameters ◽  
Aspheric Surface ◽  
Online Detection ◽  
Stationary Characteristic

The grinding machining parameters of large-caliber aspherics ultra-precision grinding processing depend on the analysis of online profile accuracy detection data .and the detection data has the second order of non-stationary characteristic . The research of second order of non-stationary data processing technique and isolate and reduce the random error of online detection data is key technology of ensure the precision of aspheric surface grinding accuracy . This paper proposed a parallel recursive identification of improved adaptive kalman filtering method , the simulation analysis and φ500mm aspheric surface element grinding experiment proved this method can real-time process second order of non-stationary data of online detection data , isolate and reduce the random error , make a best estimate of time-varying signal, provide correction parameter of grinding process , processed aspherical face proflie accuracy≤4μm.

Research on the 3-Axis CNC Ultra-Precision Grinding of Aspheric Mould

2009 ◽  
Vol 69-70 ◽  
pp. 39-43 ◽  
Author(s):  
Li Jun Li ◽  
Fei Hu Zhang ◽  
Shen Dong
Keyword(s):  
Influence Factors ◽  
Grinding Wheel ◽  
Aspheric Surface ◽  
Precision Grinding ◽  
Form Accuracy ◽  
Form Errors ◽  
Machining Test ◽  
Ultra Precision ◽  
Grinding System ◽  
Parallel Grinding

Parallel grinding is an effective method of aspheric moulds machining which is usually made of industrial ceramic such as silicon carbide (SiC) or tungsten carbide (WC), but if the spherical grinding wheel is not being with precision truing and dressing, the roughness and form accuracy of the ground aspheric surface should get worse, for this reason, in this paper, the influence factors of thoroughness and form accuracy induced by the wheel truing and dressing are studied firstly, and a new 3-axis CNC Ultra-precision grinding system which is based on the PMAC (Programmable Multi-axes Controller) is developed, through simultaneous motion of the controlled X, Z and B axis, the form errors which is induced by the grinding wheel can be improved theoretically, and the aspheric mould machining test shown that the surface roughness of Ra 0.025μm and the form accuracy of P-V 1.15μm are achieved.

Advances in research and application of optical aspheric surface metrology

2021 ◽  
Vol 14 (0) ◽  
pp. 1-26
Author(s):  
LIANG Zi-jian ◽  
◽  
◽  
YANG Yong-ying ◽  
ZHAO HONg-yang ◽  
...  
Keyword(s):  
Surface Metrology ◽  
Aspheric Surface

Restraint of Mid-Spatial-Frequency Error Aspheric Surface by Small-Tool Adaptive Polishing

2013 ◽  
Vol 33 (8) ◽  
pp. 0822002
Author(s):  
张健 Zhang Jian ◽  
代雷 Dai Lei ◽  
王飞 Wang Fei ◽  
王立朋 Wang Lipeng
Keyword(s):  
Spatial Frequency ◽  
Frequency Error ◽  
Aspheric Surface ◽  
Small Tool

Testing of Aspheric Surface Normal Vector Based on Phase Measuring Deflectometry

2011 ◽  
Vol 31 (6) ◽  
pp. 0612007
Author(s):  
赵文川 Zhao Wenchuan ◽  
范斌 Fan Bin ◽  
伍凡 Wu Fan ◽  
苏显渝 Su Xianyu ◽  
陈文静 Chen Wenjing
Keyword(s):  
Normal Vector ◽  
Aspheric Surface ◽  
Surface Normal

Design of Compensator of Convex Aspheric Surface with Small Apertures

2015 ◽  
Vol 42 (11) ◽  
pp. 1116001
Author(s):  
邢振冲 Xing Zhenchong ◽  
张葆 Zhang Bao ◽  
洪永丰 Hong Yongfeng
Keyword(s):  
Aspheric Surface
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