Research on a high-precision measuring technique for the curvature radius of a concave spherical surface

1995 ◽  
Author(s):  
Jiaming Lin ◽  
Datu Su ◽  
Fen Yin ◽  
Dingguo Sha
Keyword(s):  
High Precision ◽  
Spherical Surface ◽  
Measuring Technique ◽  
Curvature Radius ◽  
Precision Measuring

High-precision measuring technique for geometric quantities of microsphere target in microtarget assembly

2012 ◽  
Vol 24 (8) ◽  
pp. 1882-1886
Author(s):  
石帅 Shi Shuai ◽  
张林 Zhang Lin ◽  
吴文荣 Wu Wenrong ◽  
裘祖荣 Qiu Zurong
Keyword(s):  
High Precision ◽  
Measuring Technique ◽  
Precision Measuring

Absolute Measurement of Aspheric Surfaces Using White-Light Interferometry

2007 ◽  
Vol 364-366 ◽  
pp. 80-85
Author(s):  
Su Ping Chang ◽  
Tie Bang Xie ◽  
Xuang Ze Wang ◽  
Jun Guo
Keyword(s):  
High Precision ◽  
White Light ◽  
Spherical Surface ◽  
Three Dimensional ◽  
Influence Factors ◽  
Horizontal Displacement ◽  
Absolute Measurement ◽  
Aspheric Surfaces ◽  
Interferometric Technique ◽  
Main Influence

White-light interferometric technique has been widely applied in the measurement of three-dimensional profiles and roughness with high-precision. Based on the characteristic of interferometric technique, a new method combined with image location and a three-dimensional stage is proposed to achieve the non-contact absolute shape measurement for aspheric and spherical surface in a slarge range. The interference fringes vary with the horizontal displacement of the measured surface, the surface information was obtained by locating the transformation of the maximal intensity in the interferograms. Two main influence factors are discussed; they are performance of the inerferimetric microscope and the stage. Since the performance of the stage directly determines the measurement precision, a three-dimensional displacement stage with a large range and a high precision was developed. Some experiments were carried out to verify the performance of the three-dimensional displacement stage and the validity of the new measurement method with satisfactory results.

Precision mechatronics based on high-precision measuring and positioning systems and machines

2007 ◽  
Author(s):  
Gerd Jäger ◽  
Eberhard Manske ◽  
Tino Hausotte ◽  
Rostyslav Mastylo ◽  
Natalja Dorozhovets ◽  
...  
Keyword(s):  
High Precision ◽  
Positioning Systems ◽  
Precision Measuring

Online Real-Time Detection Scheme Research on Precision of Filter Rod Circumference

2015 ◽  
Vol 731 ◽  
pp. 340-344
Author(s):  
Qian Ru Tian ◽  
Bang Gui He ◽  
Zhi Long Wang
Keyword(s):  
Real Time ◽  
High Precision ◽  
High Speed ◽  
Contour Detection ◽  
Discrete Control ◽  
Compact Structure ◽  
Detection Scheme ◽  
Forming Mechanism ◽  
Precision Measuring ◽  
Real Time Detection

Precision of filter rod circumference is an important performance index of the cigarette manufacturing. The forming mechanism of filter rod, equipment vibration and other interference factors all lead to fluctuations of precision of filter rod circumference which can affect the precision of the cigarette. The existing KDF2/3 filter rod making machine which has the characteristics of compact structure (small space dimension), high speed (300 m/min) and discrete control of precision of filter rod circumference is the core equipment of filter rod production. This paper puts forward four kinds of online real-time detection schemes on precision of filter rod circumference which are Aomeijia’s many groups of detectors scheme, Keyence’s contour detection scheme, high precision measuring diameter instrument detection scheme using multiple sets of KD series meter and the 360 degrees rotating survey meter. On the basis of extensive analysis and experimental validation, Aomeijia’s four-way diameter measuring instrument scheme is optimal. The scheme applies laser to non-contact high speed scan on key radial diameter size of filter rod which achieves 0.001mm high precision detection.

Fundamental Study on Diamond Spherical Shell Film for Polishing of Concave Spherical Surface

2008 ◽  
Vol 375-376 ◽  
pp. 380-384
Author(s):  
Duo Sheng Li ◽  
Dun Wen Zuo ◽  
Rong Fa Chen ◽  
Yu Li Sun ◽  
Bing Kun Xiang ◽  
...  
Keyword(s):  
Spherical Shell ◽  
Spherical Surface ◽  
High Surface ◽  
Chemical Vapor ◽  
High Hardness ◽  
Internal Quality ◽  
Curvature Radius ◽  
Fundamental Study ◽  
Force Microscopy ◽  
Spherical Surfaces

In this paper, a new polishing technique was proposed to polish concave spherical surface by diamond spherical shell deposited by DC-Plasma Jet CVD(chemical vapor deposition), and preparation was studied from both experiment and theory. The deposited films were investigated by some techniques including: scanning electron microscopy (SEM), atom force microscopy (AFM), Raman spectroscopy, and roughness-profile-meter, which were used to analyze surface phase, microstructure, internal quality and surface roughness. The results show that the deposited diamond spherical shell film has some remarkable properties, such as high surface density, high hardness. Compared to traditional polishing techniques, it will have some potential advantages as convenient, flexible, efficient and precious. To adjust some important parameters as methane concentration, depositing time, and it can deposit the different size grain diamond spherical shell films, which are used to polish different precision degree concave spherical surfaces. Meantime, to change curvature of diamond spherical shell, it can adapt to polish various curvature radius concave spherical surfaces.

Research on Eliminating Cumulative Errors for Stitching Algorithm of Large Aperture Aspheric Optical Elements

2014 ◽  
Vol 924 ◽  
pp. 377-381
Author(s):  
Yan Ting Zhang ◽  
Xu Yang ◽  
Xin Li ◽  
Yin Biao Guo
Keyword(s):  
High Precision ◽  
Measuring Method ◽  
Transformation Method ◽  
Aspheric Surface ◽  
Optical Elements ◽  
Fast Speed ◽  
Large Aperture ◽  
Precision Measuring ◽  
Surface Optical ◽  
Datum Transformation

The sptitching measuring method applied in large-aperture aspheric surface optical elements can expand the range of precision measuring instrument. And the key point is developing the technique for high precision measuring data processing. To deal with the problem of cumulative errors which existed in the process of multi-section stitching, datum-transformation method was proposed, according to the characteristic of stitching measurement. The stitching measuring experiments were carried out based on Talysurf PGI 1240 profilometer of Taylor Hobson Company to verify the purpose for eliminating cumulative errors. The results show that datum-transformation method is feasible with the characteristic such as fast speed, high precision, and good operability.

Sign in / Sign up

Export Citation Format

Share Document