Al-Mohamedi Haroun, Prinz Andreas, Mieskes Guido, Oltrup Theo, Bende Thomas
Biomed Tech (Berl). 2014 Feb;59(1):53-7. doi: 10.1515/bmt-2013-0022.
In this article, a swept-source setup based on a semiconductor optical amplifier at the central wavelength of 1050 nm for measurements of the axial length inside the eye is presented. The large coherence length is achieved using a tunable optical filter, consisting of a reflective diffraction grating, two Littrow prisms, and a scanner. It was possible to achieve a coherence length of 40 mm, which allowed interference measurements in this range to be made. Measurements of the biomedical data of a human model eye are presented. To realize faster measurements, the data acquisition must be increased to more than 2 MS/s. In further studies, the usage of a field-programmable gate array, to achieve faster measurements, will be considered.
本文介绍了一种基于中心波长为1050 nm的半导体光放大器的扫频光源装置，用于测量眼内眼轴长度。通过使用由反射衍射光栅、两个利特罗棱镜和一个扫描仪组成的可调谐光学滤波器，实现了较大的相干长度。可以实现40 mm的相干长度，从而能够在此范围内进行干涉测量。文中展示了对人体模型眼生物医学数据的测量结果。为了实现更快的测量，数据采集速率必须提高到2 MS/s以上。在进一步的研究中，将考虑使用现场可编程门阵列来实现更快的测量。
