A high-reflective surface measurement method based on conoscopic holography technology

2014 ◽  
Author(s):  
Xu Cheng ◽  
ZhongWei Li ◽  
YuSheng Shi ◽  
HengShuang Zhao ◽  
Guomin Zhan
Keyword(s):  
Measurement Method ◽  
Surface Measurement ◽  
Reflective Surface ◽  
Conoscopic Holography

A new optical flat surface measurement method based on machine vision and deflectometry

2016 ◽  
Author(s):  
Kewei E. ◽  
Dahai Li ◽  
Lijie Yang ◽  
Guangrao Guo ◽  
Mengyang Li ◽  
...  
Keyword(s):  
Machine Vision ◽  
Measurement Method ◽  
Flat Surface ◽  
Surface Measurement

scholarly journals Multiposition Rotation Interference Absolute Measurement Method for High-Precision Optical Component Surfaces

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Xueliang Zhu ◽  
Fengming Nie ◽  
Bingcai Liu ◽  
Ruikun Liu ◽  
Ailing Tian
Keyword(s):  
High Precision ◽  
Measurement Method ◽  
Absolute Measurement ◽  
Optical Component ◽  
Computational Method ◽  
Surface Measurement ◽  
Measurement Technology ◽  
Reference Mirror ◽  
Large Aperture ◽  
Absolute Measurements

Modern optical engineering requires increasingly sophisticated interferometry methods capable of conducting subnanometer scale measurements of the large aperture, high-precision optical component surfaces. However, the accuracy of interferometry measurement is limited to the accuracy with which the surface of the reference mirror employed in the interferometer system is known, and the influence of gravity-induced deformation cannot be ignored. This is addressed in the present work by proposing a three-flat testing method based on multiposition rotation interference absolute surface measurement technology that combines the basic theory of N-position rotation with the separability of surface wavefront functions into sums of even and odd functions. These functions provide the rotational symmetric components of the wavefront, which then enables the absolute surface to be reconstructed based on the N-position rotation measurements. In addition, we propose a mechanical clamping combined with computational method to compensate for the gravity-induced deformations of the flats in the multiposition rotation absolute measurements. The high precision of the proposed absolute surface measurement method is demonstrated via simulations. The results of laboratory experiments indicate that the combination compensation method provides the high-precision surface reconstruction outcomes. The present work provides an important contribution for supporting the interferometry measurement of large aperture, high-precision optical component surfaces.

scholarly journals Measurement method of high reflective surface and small fillet structure based on blue light scanner

2019 ◽  
Vol 40 (1) ◽  
pp. 82-87
Author(s):  
ZHAO Ting ◽  
CHEN Zhitong ◽  
ZHANG Yun ◽  
ZHU Zhengqing
Keyword(s):  
Blue Light ◽  
Measurement Method ◽  
Reflective Surface

Precision Hole Making on Laminates Composite: Comparison between Drilling and Punching

2016 ◽  
Vol 857 ◽  
pp. 291-295 ◽  
Author(s):  
A.B. Abdullah ◽  
N.A. Ghaffar ◽  
Z. Samad
Keyword(s):  
Structural Material ◽  
Tool Wear ◽  
Measurement Method ◽  
Surface Measurement ◽  
Optical Surface ◽  
Hole Quality ◽  
Hole Making ◽  
Scanned Images ◽  
Precision Hole

Accurate and strong fastener assembly depends on precision of the hole. For structural material likes composites, these criteria is very important. Drilling is the most common method in producing hole on composites. But the main problem of drilling is excessive tool wear that may affect the quality of the holes. Punching is another alternative in making a hole. The main objective of this study is to compare between drilling and punching in terms of hole quality. The scanned images of the produced hole will be captured using commercial 3D optical surface measurement method namely Alicona IFM. The effect to the quality of the produced hole will be measured and compared between drilling and punching.

scholarly journals A Development of Surface Measurement Method of Impact Force Using the Sheet Piezoelectricity.

1996 ◽  
pp. 73-80
Author(s):  
Shinji Suzuki ◽  
Nobutaka Ishikawa ◽  
Toshirou Toba ◽  
Kohei Furukawa
Keyword(s):  
Measurement Method ◽  
Impact Force ◽  
Surface Measurement
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