Novel approach to exit pupil expansion for wearable displays

Karlton D. Powell; Hakan Urey

doi:10.1117/12.478876

5 August 2002 Novel approach to exit pupil expansion for wearable displays

Karlton D. Powell, Hakan Urey

Proceedings Volume 4711, Helmet- and Head-Mounted Displays VII; (2002) https://doi.org/10.1117/12.478876
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

The numerical aperture of the light emanating from display pixels in a given display system determines exit pupil size. In retinal scanning displays, the exit pupil is defined by the scanner optics, creating a rastered, projected image at an intermediate plane, typically resulting in an exit pupil approximately the size of an eye's pupil. Accounting for positional freedom of the eye and relative display placement defines the required expansion of the limited input NA for producing the desired exit pupil size for the display system. Although there are many approaches to performing this task of NA conversion, or exit pupil expansion, many of them exhibit wavelength dependencies, causing the envelope of the intensity profile in the exit pupil plane to be non- overlapping or inconsistent versus pixel location, resulting in uniformity or color variations and often efficiency loss. This paper will look at a microlens array approach to exit pupil expansion for color display systems that will be shown as wavelength independent in terms of diffraction envelope.

Citation Download Citation

Karlton D. Powell and Hakan Urey "Novel approach to exit pupil expansion for wearable displays", Proc. SPIE 4711, Helmet- and Head-Mounted Displays VII, (5 August 2002); https://doi.org/10.1117/12.478876

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available