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|Title: ||Quality Detection of Alcoholic Beverages Using Optical Fiber Tips|
|Authors: ||Pei-Kuen Wei|
Optical fiber tip
|Issue Date: ||2018-07-17T02:21:09Z
|Publisher: ||IEEE Sensors Journal|
|Abstract: ||Abstract: This paper presents the direct detection of the
quality of alcoholic beverages by simultaneously measuring the
refractive index and evaporation rate using an optical fiber tip.
The fiber tip acts as a submicrometer axicon lens. The optical
path difference between the glass tip and outside medium results
in a focused spot with its intensity modulated by the refractive
index (RI) of the medium. The intensity sensitivity is as high
as 5000%/RI unit for 32° tapered angle. When the fiber tip is
immersed in a drop (300 µL) of alcohol, the measured optical
intensity is gradually decreased due to the evaporation of solvent.
The evaporation rate and the refractive index are intrinsic
properties for various alcoholic beverages. Both parameters can
be used together to identify the quality with high sensitivity
and specificity. We used the sensitive fiber to detect different
wines, wine frauds with methanol and water. Clear differences
for different ratios of the fake wines were observed from the
initial RI and evaporation rate.
|Appears in Collections:||[光電科學研究所] 期刊論文|
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