Geometrical-optics approach to increase the accuracy in LED-based photometers for point-of-care testing.
Journal
Biomedical optics express
ISSN: 2156-7085
Titre abrégé: Biomed Opt Express
Pays: United States
ID NLM: 101540630
Informations de publication
Date de publication:
01 Jul 2019
01 Jul 2019
Historique:
received:
15
05
2019
revised:
23
06
2019
accepted:
23
06
2019
entrez:
31
8
2019
pubmed:
31
8
2019
medline:
31
8
2019
Statut:
epublish
Résumé
A geometrical-optics approach is proposed to increase the accuracy in photometric measurements, using a point-of-care testing (POCT) LED-based sensor. Due to stray-light effects, the measurement accuracy depends on the dimension of the CMOS area, where the radiation is detected. We propose two image processing approaches and evaluate the influence of the sensor area. In addition, we demonstrate that with the same measurement, both absorption coefficient and refractive index can be determined, measuring the beam attenuation and the spot-size enlargement due to ray refraction.
Identifiants
pubmed: 31467797
doi: 10.1364/BOE.10.003654
pii: 367711
pmc: PMC6706031
doi:
Types de publication
Journal Article
Langues
eng
Pagination
3654-3662Déclaration de conflit d'intérêts
The authors declare that there are no conflicts of interest related to this article.
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