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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 34 — Dec. 1, 2007
  • pp: 8379–8384

Optical system for tablet variety discrimination using visible∕near-infrared spectroscopy

Yongni Shao, Yong He, and Xingyue Hu  »View Author Affiliations


Applied Optics, Vol. 46, Issue 34, pp. 8379-8384 (2007)
http://dx.doi.org/10.1364/AO.46.008379


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Abstract

An optical system based on visible∕near-infrared spectroscopy (Vis∕NIRS) for variety discrimination of ginkgo (Ginkgo biloba L.) tablets was developed. This system consisted of a light source, beam splitter system, sample chamber, optical detector (diffuse reflection detector), and data collection. The tablet varieties used in the research include Da na kang, Xin bang, Tian bao ning, Yi kang, Hua na xing, Dou le, Lv yuan, Hai wang, and Ji yao. All samples ( n = 270 ) were scanned in the Vis∕NIR region between 325 and 1075 nm using a spectrograph. The chemometrics method of principal component artificial neural network (PC-ANN) was used to establish discrimination models of them. In PC-ANN models, the scores of the principal components were chosen as the input nodes for the input layer of ANN, and the best discrimination rate of 91.1% was reached. Principal component analysis was also executed to select several optimal wavelengths based on loading values. Wavelengths at 481, 458, 466, 570, 1000, 662, and 400 nm were then used as the input data of stepwise multiple linear regression, the regression equation of ginkgo tablets was obtained, and the discrimination rate was researched 84.4%. The results indicated that this optical system could be applied to discriminating ginkgo (Ginkgo biloba L.) tablets, and it supplied a new method for fast ginkgo tablet variety discrimination.

© 2007 Optical Society of America

OCIS Codes
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Fourier Optics and Signal Processing

History
Original Manuscript: March 5, 2007
Revised Manuscript: October 17, 2007
Manuscript Accepted: October 21, 2007
Published: November 30, 2007

Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Yongni Shao, Yong He, and Xingyue Hu, "Optical system for tablet variety discrimination using visible/near-infrared spectroscopy," Appl. Opt. 46, 8379-8384 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-34-8379

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