Experimental study on the absolute measurement of spherical surface with high accuracy

2013 ◽  
Author(s):  
Xi Hou ◽  
Weihong Song ◽  
Fan Wu ◽  
Liming Lu
Keyword(s):  
Experimental Study ◽  
Spherical Surface ◽  
Absolute Measurement ◽  
High Accuracy ◽  
The Absolute

Experimental Study on the Absolute Measurement of Flats

Fringe 2013 ◽  
2014 ◽  
pp. 503-506
Author(s):  
Wenchuan Zhao ◽  
Weihong Song ◽  
Gaofeng Wu ◽  
Yongqian Wu
Keyword(s):  
Experimental Study ◽  
Absolute Measurement ◽  
The Absolute

Semantic composition of AT-LOCATION relation with other relations

2011 ◽  
Vol 18 (3) ◽  
pp. 343-374
Author(s):  
HAKKI C. CANKAYA ◽  
EDUARDO BLANCO ◽  
DAN MOLDOVAN
Keyword(s):  
Experimental Study ◽  
High Accuracy ◽  
Semantic Relations ◽  
Semantic Composition

AbstractThis paper presents a method for the composition of at-location with other semantic relations. The method is based on inference axioms that combine two semantic relations yielding another relation that otherwise is not expressed. An experimental study conducted on PropBank, WordNet, and eXtended WordNet shows that inferences have high accuracy. The method is applicable to combining other semantic relations and it is beneficial to many semantically intense applications.

High-accuracy interferometer with a prism pair for measurement of the absolute refractive index of glass

2009 ◽  
Vol 48 (11) ◽  
pp. 2045 ◽  
Author(s):  
Yasuaki Hori ◽  
Akiko Hirai ◽  
Kaoru Minoshima ◽  
Hirokazu Matsumoto
Keyword(s):  
Refractive Index ◽  
High Accuracy ◽  
Absolute Refractive Index ◽  
The Absolute ◽  
Prism Pair

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.

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