OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 27, Iss. 22 — Nov. 15, 1988
  • pp: 4653–4659

Industrial use of a real-time optical inspection system

David Casasent and Jeffrey Richards  »View Author Affiliations

Applied Optics, Vol. 27, Issue 22, pp. 4653-4659 (1988)

View Full Text Article

Enhanced HTML    Acrobat PDF (1121 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



Real-time optical inspection techniques are discussed and implemented on laboratory systems. Specifically, we show how Fourier transform and Hough transform data can be used in an industrial inspection application. We also discuss how a 1-D synthetic discriminant function is used for label inspection. Real-time optical Hough transform inspection data using a 2-D spatial light modulator is presented and discussed. A color liquid crystal television (LCTV) is used as the input transducer to provide real-time data. New methods to process color image data on color LCTVs are detailed. A new high speed acoustooptic architecture to generate Hough transform slices is also detailed. A specific product inspection case study is discussed.

© 1988 Optical Society of America

Original Manuscript: April 8, 1988
Published: November 15, 1988

David Casasent and Jeffrey Richards, "Industrial use of a real-time optical inspection system," Appl. Opt. 27, 4653-4659 (1988)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. D. Clark, D. Casasent, “Practical Optical Fourier Analysis for High Speed Inspection,” Opt. Eng. 27, 365 (1988). [CrossRef]
  2. D. Casasent, J. Richards, “Optical Hough and Fourier Processors for Product Inspection,” Opt. Eng. 27, 258 (1988). [CrossRef]
  3. H. Kasden, “Industrial Applications of Diffraction Pattern Sampling,” Opt. Eng. 18, 496 (1979).
  4. D. Casasent, S. Xia, J. Song, A. Lee, “Diffraction Pattern Sampling Using a Computer-Generated Hologram,” Appl. Opt. 25, 983 (1986). [CrossRef] [PubMed]
  5. R. Messner, H. Szu, “An Image Processing Architecture for Real Time Generation of Scale and Rotation Invariant Patterns,” Comput. Vision Graphics Image Process. 31, 50 (1985). [CrossRef]
  6. R. Duda, P. Hart, Pattern Classification and Scene Analysis (Wiley, New York, 1972).
  7. K. Fukunaga, Statistical Pattern Recognition (Academic, New York, 1973).
  8. D. Glover, “A Hybrid Optical Fourier/Electronic Neurocomputer Machine Vision Inspection System,” Machine Vision ‘88.
  9. D. Joyeux, S. Lowenthal, “Optical Fourier Transform: What is the Optimal Setup?,” Appl. Opt. 21, 4368 (1982). [CrossRef] [PubMed]
  10. Special Issue on Acousto-Optic Signal Processing, IEEE Proc.69 (Jan.1981).
  11. P̄ Hough, “Methods and Means for Recognizing Complex Patterns,” U.S. Patent3,069,654 (Dec.1962).
  12. C. Dyer, “Gauge Inspection Using Hough Transforms,” IEEE Trans. Pattern. Anal. Machine Intell. PAMI-5, 621 (1983). [CrossRef]
  13. H. H. Barrett, “Optical Processing in Radon Space,” Opt. Lett. 7, 248 (1982). [CrossRef] [PubMed]
  14. G. Gindi, A. Gmitro, “Optical Feature Extraction via the Radon Transform,” Opt. Eng. 23, 499 (1984). [CrossRef]
  15. W. Steier, R. Shori, “Optical Hough Transform,” Appl. Opt. 25, 2734 (1986). [CrossRef] [PubMed]
  16. J. Richards, P. Vermeulen, E. Barnard, D. Casasent, “Parallel Holographic Generation of Multiple Hough Transform Slices,” submitted to Appl. Opt.
  17. R. Krishnapuram, D. Casasent, “Optical Associative Processor for General Linear Transformations,” Appl. Opt. 26, 2641 (1987). [CrossRef]
  18. R. Lewis, “Real-Time Coherent Optical Edge Enhancement,” Appl. Opt. 17, 161 (1978). [CrossRef] [PubMed]
  19. D. Casasent, J. Chen, “Nonlinear Local Image Preprocessing Using Coherent Optical Techniques,” Appl. Opt. 22, 808 (1983). [CrossRef] [PubMed]
  20. K. Hughes, S. Rogers, J. Mills, M. Kabrisky, “Optical Preprocessing Using Liquid Crystal Television,” Appl. Opt. 26, 1042 (1987). [CrossRef] [PubMed]
  21. L. M. Blinov, Electro-Optical and Magneto-Optical Properties of Liquid Crystals (Wiley, New York, 1983).
  22. A. Mahalanobis, B. V. K. Kumar, D. Casasent, “Minimum Average Correlation Energy Filters,” Appl. Opt. 26, 3633 (1987). [CrossRef] [PubMed]
  23. R. Sprague, “A Review of Acousto-Optic Signal Correlators,” Opt. Eng. 16, 467 (1977). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited