SGER: Intraocular Camera for Retinal Prostheses (Optical System)

这项研究项目的基本目标是研究一种超紧凑型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，具有直接耦合到接近耦合到视网膜表面的像素化微刺激器阵列的能力。这种眼内摄像机(IOC)的开发将消除对外部头戴式或眼镜式摄像机的需要，以及从外部设备向眼腔传输视频流的需要。没有移动部件或反馈控制的住宿能力将通过采用几乎无限景深的相机设计来结合。这种超紧凑型光学成像系统将需要高性能折射和衍射光学元件(包括新的分层体积衍射光学元件)和源于人类心理物理的宽松系统约束的独特组合。另一个目标是评估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所驱动的摄像机小型化的基本和技术限制。将对低像素化水平的静态和动态(运动)图像的识别进行心理物理评估，以便为拟议的眼内相机(IOC)光学装置的设计提供关键限制。

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.