Publication Type
Journal
Journal Name
Optics Letters
Publication Date
Page Numbers
1520 to 1522
Volume
37
Issue
9
Abstract
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 400nm – 700nm with a maximum error of 0.0036 units (0.24% of actual) at 414nm for a η = 1.50 sample. We present system design and calibration method details as well as results from a system validation sample.
