Novel Image Polarization Method for Measurement of Lens Decentration

Tilt and decenter errors in lenses are usually caused by lens manufacturing processes: either injection or glass molding. This paper presents an image polarization method for measuring tilting and decentering of lenses. We placed a sample lens between two linear polarizers and passed either a focuse...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2011-05, Vol.60 (5), p.1845-1853
Main Authors: Huang, Kuo-Cheng, Chang, Chun-Li, Wu, Wen-Hong
Format: Article
Language:English
Subjects:
Adaptive optics
Beams (radiation)
Decenter
Errors
Image color analysis
image of polarization
image processing
Injection molding
Instrumentation
Lenses
Optical imaging
Optical polarization
Plastics
Polarization
Residual stresses
Tilt
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Summary:Tilt and decenter errors in lenses are usually caused by lens manufacturing processes: either injection or glass molding. This paper presents an image polarization method for measuring tilting and decentering of lenses. We placed a sample lens between two linear polarizers and passed either a focused or a divergent polarized beam through a half-wave or a full-wave plate. If any error were present in the shape of the lens, patterns and colors shown in the image of polarization would be altered. Finally, the degree of error in the shape of the lens can be computed using image processing software.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2011.2108070