Dispersion effects in partial coherence interferometry: Implications for intraocular ranging

被引：111

作者：

Hitzenberger, CK ^{[1
]}

Baumgartner, A ^{[1
]}

Drexler, W ^{[1
]}

Fercher, AF ^{[1
]}

机构：

[1] Univ Vienna, Inst Med Phys, A-1090 Vienna, Austria

来源：

JOURNAL OF BIOMEDICAL OPTICS | 1999年 / 4卷 / 01期

关键词：

partial coherence interferometry; optical coherence tomography; dispersion; dispersion compensation eye; ocular media;

D O I：

10.1117/1.429900

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

hn nondispersive media, the minimum distance that can be resolved by partial coherence interferometry (PCI) and optical coherence tomography (OCT) is inversely proportional to the source spectral bandwidth. Dispersion tends to increase the signal width and to degrade the resolution. We analyze the situation for PCI ranging and OCT imaging of ocular structures. It can be shown that for each ocular segment an optimum source bandwidth yielding optimum resolution exists. if the resolution is to be improved beyond this point, the group dispersion of the ocular media has to be compensated. With the use of a dispersion compensating element, and employing a broadband superluminescent diode, we demonstrate a resolution of 5 mu m in the retina of both a model eye and a human eye in vivo. This is an improvement by a factor of 2-3 as compared to currently used instruments. (C) 1999 Society of Photo-Optical Instrumentation Engineers. [S1083-3668(99)00701-7].

引用

页码：144 / 151

页数：8

共 30 条

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