Fibre optic shape-measuring system using phase-stepping speckle-pattern interferometry

1993 ◽  
Author(s):  
Lewis S. Wang ◽  
Brian N. Dobbins ◽  
K. Jambunathan ◽  
Xiaoping Wu
Keyword(s):  
Speckle Pattern ◽  
Measuring System ◽  
Fibre Optic ◽  
Phase Stepping

On-Machine Surface Texture Measuring System Using Laser Speckle Pattern Analysis

2016 ◽  
Vol 10 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Motochika Shimizu ◽  
◽  
Hiroshi Sawano ◽  
Hayato Yoshioka ◽  
Hidenori Shinno ◽  
...  
Keyword(s):  
Surface Texture ◽  
Machine Surface ◽  
Vibration Isolation ◽  
Pattern Analysis ◽  
Speckle Pattern ◽  
Laser Speckle ◽  
Surface Structures ◽  
Measuring System ◽  
Machined Surface ◽  
Machining System

Functional surfaces are expected technologies in various industries. However, the efficient generation of microscale surface structures is difficult because the process relies on precision surface texture assessments, which require long measuring times. An on-machine measuring system may solve this issue. In this study, a new on-machine surface texture measuring system based on laser speckle pattern analysis is proposed. The proposed system efficiently assesses various qualities of the surface texture, such as surface roughness, undulation of microscale surface structures, and anisotropy, from a laser speckle pattern obtained from the precision-machined surface. For precise measurements, disturbances caused by the machining system itself and the environment must be avoided. The laser speckle detection unit in the proposed system is supported by non-contact active vibration-isolation units, which reduce the transmission of ground vibrations. From the experimental results, the system indicated high repeatability in measurements and robustness against disturbances.

Phase stepping through polarizing modulation in electronic speckle pattern interferometry

2020 ◽  
Vol 59 (20) ◽  
pp. 6005
Author(s):  
Gustavo A. Gómez-Méndez ◽  
Gustavo Rodríguez-Zurita ◽  
Amalia Martínez-García ◽  
Yukitoshi Otani ◽  
David I. Serrano-García ◽  
...  
Keyword(s):  
Speckle Pattern ◽  
Electronic Speckle Pattern Interferometry ◽  
Phase Stepping
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