| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4508577 | Engineering in Agriculture, Environment and Food | 2010 | 5 Pages |
Abstract
The optimum wavelength for measuring pupil reflection in order to estimate serum vitamin A level in slaughtered and live cattle was investigated. A multispectrum camera was used to obtain the eye images. The highest coefficient of determination 0.76 between pupil reflection and serum vitamin A level was obtained at 500 nm. Since the photosensitive pigment rhodopsin has a maximum absorption of about 500 nm, the results suggest that 500 nm could be the optimum wavelength for measuring pupil reflection.
Keywords
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Authors
Noriko Takahashi, Naoshi Kondo, Nguyen Quoc Tuan, Shoichi Mano, Tomoo Shiigi, Hiroshi Shimizu, Moriyuki Fukushima, Fumiyuki Iwaki, Osamu Watanabe, Kazuyuki Fukuzono, Mamoru Nakano,