Fernández Enrique, Unterhuber Angelika, Prieto Pedro, Hermann Boris, Drexler Wolfgang, Artal Pablo
Opt Express. 2005 Jan 24;13(2):400-9. doi: 10.1364/opex.13.000400.
A compact mode-locked Ti:sapphire laser, emitting a broad spectrum of 277 nm bandwidth, centered at 790 nm, was used to measure the dependence of the aberrations of the human eye with wavelength in the near infrared region. The aberrations were systematically measured with a Hartmann-Shack wave-front sensor at the following wavelengths: 700, 730, 750, 780, 800, 850, 870 and 900 nm, in four normal subjects. During the measurements, the wavelengths were selected by using 10 nm band-pass filters. We found that monochromatic high order aberrations, beyond defocus, were nearly constant across 700 to 900 nm wavelength in the four subjects. The average chromatic difference in defocus was 0.4 diopters in the considered wavelength band. The predictions of a simple water-eye model were compared with the experimental results in the near infrared. These results have potential applications in those situations where defocus or higher order aberration correction in the near infrared is required. This is the case of many imaging techniques: scanning laser ophthalmoscope, flood illumination fundus camera, or optical coherence tomography.
一台紧凑的锁模钛宝石激光器，发射中心波长为790nm、带宽为277nm的宽光谱，用于测量人眼像差在近红外区域随波长的变化。在四名正常受试者中，使用哈特曼-夏克波前传感器在以下波长下系统地测量像差：700、730、750、780、800、850、870和900nm。在测量过程中，通过使用10nm带通滤光片选择波长。我们发现，在四名受试者中，除散焦外的单色高阶像差在700至900nm波长范围内几乎保持恒定。在所考虑的波长带中，散焦的平均色差为0.4屈光度。将一个简单的水眼模型的预测结果与近红外区域的实验结果进行了比较。这些结果在需要近红外散焦或高阶像差校正的情况下具有潜在应用。许多成像技术都是这种情况：扫描激光检眼镜、泛光照明眼底照相机或光学相干断层扫描。
