Abstract
We present an innovative augmented reality display to project information on the perifovea. Our system uses a contact lens embedding various diffractive optical elements (DOE) and switchable light sources. The DOEs are located at the iris periphery, keeping the visual axis free of any disturbance while allowing AR content projection onto the perifovea. The use of DOEs limits the quantity of displayable information for instance to some warning symbols but allows the design of more easily manufacturable elements. A proof of concept using a mock up eye (scale 2:1) to assess the impact of laser injection and mydriasis on image reconstruction quality is presented together with a video showing how the system operates dynamically.
Highlights
Technological advances have allowed information to be brought ever closer to the user culminating with today’s see through augmented reality (AR) systems.[1]
We present an innovative PRAR on a contact lens to project simple stimuli, on the peripheral retina. (By extension, we use here the term perifovea to encompass both the narrow parafovea and perifovea.)
We have presented and scaled a very simple PRAR concept able to effectively solve the display and eye alignment issue, which is a limitation in the near-eye display (NED)
Summary
Technological advances have allowed information to be brought ever closer to the user (books, computers, laptops, smart phones) culminating with today’s see through augmented reality (AR) systems.[1]. Several systems have been proposed to offer retinal AR (RAR).[2,3,4] We refer here, by CLD, to systems fully integrating the image generator into the contact lens. Other designs combining a contact lens with an eyewear integrating part of the image generator exist[5] but the alignment issues between the projector and the moving eye’s pupil strongly limit their field of view (FOV). Since the first single-pixel CLD from the Parviz group,[6,7] a number of papers have been published addressing the many challenges that need to be overcome to produce a fully functional CLD, such as power management (e.g. battery and energy harvesting8), biocompatibility, mechanical, and electrical integration and display technology (e.g. using liquid crystal modulation[9] or micro or nano scaled light emitting components[10,11]). If we consider for instance Chen et al’s design,[10] according to the authors, “the minimal numbers of pixels for the nonfoveated and foveated displays are 15.38 and 3.20 megapixels” so far from what is achievable today (assuming a foveated LED array, this is the number of LEDS required to yield an angular resolution of 1’ for a FOV of 100 deg, basically equating the number of LEDs to the number of photoreceptors)
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