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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 9 — May. 1, 2012
  • pp: 1520–1522

Full-field imaging-based instantaneous hyperspectral absolute refractive index measurement

Justin S. Baba and Philip R. Boudreaux  »View Author Affiliations

Optics Letters, Vol. 37, Issue 9, pp. 1520-1522 (2012)

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Multispectral refractometers typically measure refractive index (RI) at discrete monochromatic wavelengths via a serial process. We report on the demonstration of a white light full-field imaging-based refractometer capable of instantaneous multispectral measurement of absolute RI of clear liquid-gel samples across the entire visible light spectrum. The broad optical bandwidth refractometer is capable of hyperspectral measurement of RI in the range 1.30–1.70 between 400 and 700 nm with a maximum error of 0.0036 units (0.24% of actual) at 414 nm for an η=1.50 sample. We present system design and calibration method details as well as results from a system validation sample.

© 2012 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(120.5700) Instrumentation, measurement, and metrology : Reflection
(120.5710) Instrumentation, measurement, and metrology : Refraction
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Imaging Systems

Original Manuscript: January 2, 2012
Revised Manuscript: February 14, 2012
Manuscript Accepted: February 14, 2012
Published: April 27, 2012

Justin S. Baba and Philip R. Boudreaux, "Full-field imaging-based instantaneous hyperspectral absolute refractive index measurement," Opt. Lett. 37, 1520-1522 (2012)

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