A Helmet Mounted Display Application For The Space Station Freedom Extravehicular Mobility Unit

Constance L. Tritsch

doi:10.1117/12.960900

5 September 1989 A Helmet Mounted Display Application For The Space Station Freedom Extravehicular Mobility Unit

Constance L. Tritsch

Proceedings Volume 1116, Helmet-Mounted Displays; (1989) https://doi.org/10.1117/12.960900
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

The routine extravehicular activity (EVA) performed from the U.S. Space Station Freedom will require the astronaut to access large amounts of information during the EVA, especially for intensive EVA scenarios such as satellite servicing and emergency or contingent operations. As a result, NASA is presently designing a helmet mounted display (HMD) into the Freedom Station extravehicular mobility unit (EMU) to aid the EVA astronaut. The HMD allows the astronaut to view a virtual image behind a transparent combiner located conveniently above his or her primary field of view (FOV). This HMD system can be voice-driven for "hands-free" operation. NASA is currently exploring four HMD approaches. Two designs utilize cathode ray tubes (CRT's), while the other two use backlit liquid crystal displays (LCD's). Furthermore, two of these designs use purely conventional optics, while the other two employ conventional and holographic optics. A discussion of these designs and some key design issues, such as image source, FOV, exit pupil versus non-pupil-forming systems, monocular versus binocular and biocular viewing, degree of image overlap, and the use of holographic optical elements (HOE's), will be provided in this paper.

Citation Download Citation

Constance L. Tritsch "A Helmet Mounted Display Application For The Space Station Freedom Extravehicular Mobility Unit", Proc. SPIE 1116, Helmet-Mounted Displays, (5 September 1989); https://doi.org/10.1117/12.960900

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