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20 pages, 7556 KB

Open AccessArticle

Eye Vision Testing System and Eyewear Using Micromachines

by Nabeel A. Riza, M. Junaid Amin and Mehdi N. Riza

Micromachines 2015, 6(11), 1690-1709; https://doi.org/10.3390/mi6111449 - 6 Nov 2015

Cited by 4 | Viewed by 17770

Proposed is a novel eye vision testing system based on micromachines that uses micro-optic, micromechanic, and microelectronic technologies. The micromachines include a programmable micro-optic lens and aperture control devices, pico-projectors, Radio Frequency (RF), optical wireless communication and control links, and energy harvesting and storage devices with remote wireless energy transfer capabilities. The portable lightweight system can measure eye refractive powers, optimize light conditions for the eye under testing, conduct color-blindness tests, and implement eye strain relief and eye muscle exercises via time sequenced imaging. A basic eye vision test system is built in the laboratory for near-sighted (myopic) vision spherical lens refractive error correction. Refractive error corrections from zero up to −5.0 Diopters and −2.0 Diopters are experimentally demonstrated using the Electronic-Lens (E-Lens) and aperture control methods, respectively. The proposed portable eye vision test system is suited for children’s eye tests and developing world eye centers where technical expertise may be limited. Design of a novel low-cost human vision corrective eyewear is also presented based on the proposed aperture control concept. Given its simplistic and economical design, significant impact can be created for humans with vision problems in the under-developed world. Full article

(This article belongs to the Special Issue Micro/Nano Photonic Devices and Systems)

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19 pages, 5588 KB

Open AccessArticle

Multi-Functional Micro Projection Device as Screen Substitute for Low Power Consumption Computing

by Yuval Kapellner and Zeev Zalevsky

J. Low Power Electron. Appl. 2012, 2(1), 79-97; https://doi.org/10.3390/jlpea2010079 - 5 Mar 2012

Cited by 1 | Viewed by 9134

Abstract

One of the major power consuming components in a computer is its display unit. On average the screen consumes ten times more power than the DSP processor itself. Thus, reducing the power consumption should be one of the most important tasks in the development of low power consumption computing systems. In this paper we present one possible solution involving micro projection device based upon lasers and a digital light processing (DLP) matrix which is a matrix of electrically controllable mirrors capable of translating electrical signal to a time varying projected image. It can serve to substitute a screen and consume ten times less power than a conventional screen. The described device is a multifunctional highly efficient customized DLP light engine being capable of serving as an image projector and simultaneously to support range and topography estimation measurements. Full article

(This article belongs to the Special Issue Industrial Aspects of Low Power Design Recent Trends and Methods)

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