SGER: Intraocular Camera for Retinal Prostheses (Optical System)

0638469 Tanguay本研究项目的基本目标是研究超紧凑光学成像系统的可行性，该系统用于设计用于手术植入人眼的微型相机，具有直接耦合到像素化微刺激器阵列的能力，该像素化微刺激器阵列邻近耦合到视网膜表面。这种眼内相机（IOC）的开发将消除对外部头戴式或眼镜安装式相机的需要，以及将视频流从外部设备传输到眼腔中的需要。没有移动部件或反馈控制的适应能力将通过采用表现出几乎无限景深的相机设计来实现。这种超紧凑的光学成像系统将需要高性能折射和衍射光学元件（包括新颖的分层体积衍射光学元件）与源自人类心理物理学的放松的系统约束的独特组合。另一个目标是评估相机小型化的基本和技术限制，由微刺激器阵列内微电极的数量、密度和放置所提供的约束驱动。将进行在低像素水平下识别静态和动态（运动）图像的心理物理评价，以提供拟议眼内相机（IOC）光学器件设计的关键约束。

0638469TanguayThe fundamental goal of this research project is to investigate the feasibility of an ultra compact optical imaging system for a miniature camera designed for surgical implantation into the human eye, with capability to couple directly to a pixellated microstimulator array that is proximity-coupled to the retinal surface. The development of such an intraocular camera (IOC) would eliminate the need for an external head-mounted or eyeglass-mounted camera, as well as the need to transmit video streams into the eye cavity from an external device. The capability for accommodation with no moving parts or feedback control will be incorporated by employing camera designs that exhibit nearly infinite depth of field. Such an ultra compact optical imaging system will require a unique combination of high performance refractive and diffractive optical elements (including novel stratified volume diffractive optical elements) and relaxed system constraints derived from human psychophysics. A further goal is to assess the fundamental and technological limitations to camera miniaturization, driven by the constraints provided by the number, density, and placement of the microelectrodes within the microstimulator array. Psychophysical evaluation of the recognition of both static and dynamic (motion) images at low pixellation levels will be undertaken to provide key constraints for the design of the proposed intraocular camera (IOC) optics.