Development of the enhanced concurrent in-line inspection system for CO2 laser drilling machine

2000 ◽  
Author(s):  
Hideaki Nagatoshi ◽  
Kazuhide Isaji ◽  
Tsutomu Sugiyama ◽  
Hidehiko Karasaki ◽  
Makoto Kato
Keyword(s):  
Laser Drilling ◽  
Inspection System ◽  
Drilling Machine

Concurrent in-line inspection system for CO2 laser drilling machine

1999 ◽  
Author(s):  
Makoto Kato ◽  
Nobuhiro Araki ◽  
Kazuhide Isaji ◽  
Hidehiko Karasaki
Keyword(s):  
Laser Drilling ◽  
Inspection System ◽  
Drilling Machine

5617 Development of Laser Drilling Machine for Printed Wiring Boards

2006 ◽  
Vol 2006.7 (0) ◽  
pp. 331-332 ◽  
Author(s):  
Haruaki OTSUKI ◽  
Yasushi ITO ◽  
Hiroshi AOYAMA ◽  
Souichi TOHYAMA ◽  
Hiromu HIRAI
Keyword(s):  
Laser Drilling ◽  
Drilling Machine ◽  
Printed Wiring Boards

E11 Shape control of holes with the laser drilling machine that controls laser

2012 ◽  
Vol 2012.9 (0) ◽  
pp. 271-272
Author(s):  
Yoshimasa Yokosawa ◽  
Hirofumi Hidai ◽  
Souta Matsusaka ◽  
Noboru Morita
Keyword(s):  
Shape Control ◽  
Laser Drilling ◽  
Drilling Machine

Real-Time Breakthrough Detection for Laser Drilling Based on Coaxial Visual Sensing Technology

2013 ◽  
Vol 284-287 ◽  
pp. 2281-2285
Author(s):  
Chao Ching Ho ◽  
Jin Chen Hsu ◽  
Yuan Jen Chang ◽  
Chia Lung Kuo ◽  
Jun Jia He
Keyword(s):  
Real Time ◽  
Low Cost ◽  
Laser Drilling ◽  
Inspection System ◽  
Manufacturing Cost ◽  
Monitoring And Control ◽  
Drilling Depth ◽  
Visual Sensing ◽  
Sensing Technology ◽  
Process Monitoring And Control

As the production demand for laser drilled holes continues to grow, efficient and reliable process monitoring and control techniques are required in order to improve the manufacturing efficiency and reduce manufacturing cost for ensuring quality conformance. A robust, real-time monitoring system for breakthrough and the drilling depth detection in laser drilling is proposed. The system is based on based on coaxial visual sensing technology of the working surface using a CMOS camera, coupled with microcontroller control of the drilling laser operation. The camera is installed adjacent to the entry surface of the workpiece, and the spatial extend of the laser-induced plasma at the working site is monitored as the criterion for breakthrough detection. Therefore, on-line inspection system with low cost is developed to increase productivity. Experimental results show that the proposed system successfully detects when the laser beam has broken through a workpiece, and turns off the laser automatically by feedback control.

Method of Analyzing the Singlet F-Theta Scan Lens for Laser Drilling System

2007 ◽  
Vol 364-366 ◽  
pp. 521-526
Author(s):  
Ming Fei Chen ◽  
Yu Pin Chen ◽  
Chun Wei Hu ◽  
Chien Chuan Chen
Keyword(s):  
Laser Drilling ◽  
Scanning System ◽  
Drilling Machine ◽  
Scanning Velocity ◽  
Projection Plane ◽  
Drilling System ◽  
Simulation Results ◽  
Focusing Lens ◽  
Scanning Systems

The scanning system which uses the non-linear focusing lens is usually accompanied by a major problem that is a non-constant scanning velocity of the spots in the projection plane. Moreover, the energy of the spots and the shape of the drilling holes would be affected. Hence, the focal lens of the scanning system usually uses the f-theta lens to solve this problem. This paper proposes a method utilizing the ZEMAX to analyze the commercial F-theta lens. The results indicate the F-theta lens can increase the quality of the drilling holes and amend the projection plane. In order to verify the analysis results, each diameter of an array holes drilled by the CO2 laser drilling machine would be measured. The experimental results can demonstrate that the percentage of the variation in the diameter of holes is close to the simulation results. Therefore, the method can effectively analyze the F-theta lens of the scanning systems.

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