We demonstrate a system for measuring the ocular axial length （AL） with high sensitivity and high speed using spectral-domain low-coherence interferometry （SD-LCI）. To address the limit in measuring such a large r...We demonstrate a system for measuring the ocular axial length （AL） with high sensitivity and high speed using spectral-domain low-coherence interferometry （SD-LCI）. To address the limit in measuring such a large range by using SD-LCI, we propose a full-range method to recognize the positive and negative depths. The reference arm length is changed synchronously with the shift of the focal point of the probing beam. The system provides a composite depth range that is sufficient to cover the whole eye. We demonstrate the performance of the presented system by measuring the ALs of five volunteers. This system can provide the A-scan ocular biometric assessment of the corneal thickness and AL in 0.1 s.展开更多
Preclinical research of biomedical optoelectronic devices is often performed with the use of blood phantoms-a simplified physical model of blood.The aim of this study is the comparison and distinction between blood ph...Preclinical research of biomedical optoelectronic devices is often performed with the use of blood phantoms-a simplified physical model of blood.The aim of this study is the comparison and distinction between blood phantoms as well as whole human blood measurements.We show how the use of such phantoms may in°uence the incorrect interpretation of measured signal.On the other hand,we highlight how the use of blood phantoms enables to investigate the phenomena that otherwise are almost impossible to be noticed.展开更多
基金supported in part by the National Natural Science Foundation of China(NSFC)(Nos.61275214,31170956,and 61771119)the Hebei Provincial Natural Science Foundation of China(Nos.A2015501065 and H2015501133)
文摘We demonstrate a system for measuring the ocular axial length （AL） with high sensitivity and high speed using spectral-domain low-coherence interferometry （SD-LCI）. To address the limit in measuring such a large range by using SD-LCI, we propose a full-range method to recognize the positive and negative depths. The reference arm length is changed synchronously with the shift of the focal point of the probing beam. The system provides a composite depth range that is sufficient to cover the whole eye. We demonstrate the performance of the presented system by measuring the ALs of five volunteers. This system can provide the A-scan ocular biometric assessment of the corneal thickness and AL in 0.1 s.
文摘Preclinical research of biomedical optoelectronic devices is often performed with the use of blood phantoms-a simplified physical model of blood.The aim of this study is the comparison and distinction between blood phantoms as well as whole human blood measurements.We show how the use of such phantoms may in°uence the incorrect interpretation of measured signal.On the other hand,we highlight how the use of blood phantoms enables to investigate the phenomena that otherwise are almost impossible to be noticed.
