Optical alignment and tilt-angle measurement technique based on Lloyd’s mirror arrangement

1992 ◽  
Vol 17 (14) ◽  
pp. 1024 ◽  
Author(s):  
Huihua Kenny Chiang ◽  
Richard P. Kenan ◽  
Nile F. Hartman ◽  
Christopher J. Summers
Keyword(s):  
Measurement Technique ◽  
Tilt Angle ◽  
Angle Measurement ◽  
Optical Alignment

Tilt-angle measurement of a sample stage using a capacitive liquid-based inclinometer

2012 ◽  
Author(s):  
K. Matoba ◽  
J. Takagi ◽  
T. Yasunaga ◽  
H. Jinnai ◽  
K. Iwasaki
Keyword(s):  
Tilt Angle ◽  
Angle Measurement

Tilt angle measurement of low molar mass organosiloxane liquid crystals

2000 ◽  
Vol 244 (1) ◽  
pp. 331-338 ◽  
Author(s):  
C. Noot ◽  
S. P. Perkins ◽  
H. J. Coles
Keyword(s):  
Liquid Crystals ◽  
Tilt Angle ◽  
Molar Mass ◽  
Angle Measurement

A New Approach to Calibration of Printed Circuit Board Coordinates: 2D-Depth Sensor Applied to Robotic Screwdrivers Assembly Systems

2014 ◽  
Vol 939 ◽  
pp. 445-450
Author(s):  
Shu Ping Dong ◽  
Hau Wei Wang ◽  
Tung Ying Wu ◽  
Ching Ming Yeh
Keyword(s):  
Tilt Angle ◽  
Printed Circuit Board ◽  
Angle Measurement ◽  
Consumer Electronics ◽  
Circuit Board ◽  
Depth Information ◽  
Depth Sensor ◽  
Printed Circuit Board Assembly ◽  
Printed Circuit ◽  
Vision Inspection

We consider the parts screwing problems, which of automatic assembly robotic screwdrivers system required precisely depth and tilt-angle at each insertion point. However, commonly computer vision inspection tools which obtain tilt-angle on clamping printed circuit board is a challenging problem. Further, even if given a depth senor, that still to consider inspection target size. Thus, we present an approach for screwing angle measurement of printed circuit board assembly in Consumer electronics production lines. The methods involved using 2D-Depth sensor to identify screwing angle, and measuring depth information near the hole of printed circuit board. Our method successfully conform to screwdrivers system requirement, tilt angle under three degree and sampling small area target under 10mm^2,which obtains measurement results will be applied to refer on robotic positioning and assembling.

Reproducibility of a simplified Q-angle measurement technique

2010 ◽  
Vol 21 (2) ◽  
pp. 158-164 ◽  
Author(s):  
Jason D. Peeler ◽  
Jeff Leiter ◽  
Judy E. Anderson
Keyword(s):  
Measurement Technique ◽  
Angle Measurement ◽  
Q Angle

An evaluation of a new side-wall-angle measurement technique for mask patterns by CD-SEM

2009 ◽  
Author(s):  
Hidemitsu Hakii ◽  
Isao Yonekura ◽  
Masashi Kawashita ◽  
Yosuke Kojima ◽  
Yoshifumi Sakamoto ◽  
...  
Keyword(s):  
Measurement Technique ◽  
Side Wall ◽  
Angle Measurement ◽  
Wall Angle
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