NDLI: Virtual retinal display/sup TM/, a scanned photon delivery system

Content Provider	IEEE Xplore Digital Library
Author	Lippert, T.M.
Copyright Year	1999
Description	Author affiliation: Microvision Inc., Bothell, WA, USA (Lippert, T.M.)
Abstract	The VRD functional components are illustrated. RGB video drives modulators to impress information on Gaussian beams, which are optically combined to form full-color pixels of luminance and chromaticity determined by appropriate colorimetry. Typically, the pixel stream is fed into a single-mode optical fiber of length sufficient to dislocate the photonics/electronics package from the head worn scanning engine. There, the beam is air propagated to a focus lens, deflected into a raster format synchronized with the video, optically collimated, and combined with the viewer's visual field to achieve a spatially stabilized virtual image presentation. Multiple image-writing beams may be incorporated to increase the pixel count achieved with a given horizontal line scanner, designed to operate in air at resonant frequencies. Vertical refresh scanners are of sawtooth-driven servo type for progressive line scanning. The writing beam forms a narrow optical exit pupil which may serve as a viewer self-alignment feature in vision screening products such as an ophthalmic perimeter, or may be expanded to meet typical military aviation HMD requirements. A narrow exit pupil is relatively insensitive to a user's refractive errors or occluding media, making the VRD an inherently superior approach to low vision aiding. An active narrow exit pupil concept is currently under development to optimize VRD image quality and light efficiency.
Starting Page	283
Ending Page	284
File Size	250691
Page Count	2
File Format	PDF
ISBN	0780356349
ISSN	10928081
DOI	10.1109/LEOS.1999.813593
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-11-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Retina Displays Optical refraction Optical modulation Optical beams Streaming media Optical fibers Photonics Electronics packaging Head
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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