Tilted Cat Helmet Mounted Display

J. G. Droessler; D. J. Rotier

doi:10.1117/12.960893

5 September 1989 Tilted Cat Helmet Mounted Display

J. G. Droessler, D. J. Rotier

Proceedings Volume 1116, Helmet-Mounted Displays; (1989) https://doi.org/10.1117/12.960893
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

Honeywell has developed a new helmet mounted display (HMD) with a 60° field of view (FOV) by using a unique Tilted Cat (Catadioptric) Combiner. The Tilted Cat display concept allows a wide FOV display to be designed: with a 3:1 display brightness improvement over the conventional folded catadioptric approach; provides a similar improvement in combiner see through transmissions; and only requires a small tilt on the optically powered combiner which minimizes the complexity of the optics. Large FOV HMD's with see through capability require tilted optically powered surfaces with complex optical systems for the display projection and relay. The optical performance of a tilted powered element becomes more asymetric as the tilt increases, and to maintain a resultant well resolved symmetric display image, additional non-symmetric, tilted, decentered lens elements are required. The Tilted Cat combiner permitted a practical display optical system to be defined for a 60° FOV. The high resolution performance levels of the smaller FOV displays was obtained, with the resolution limited only by the CRT's resolution. A summary of the design considerations, the development of, and the demonstrated performance data for the 60° Tilted Cat HMD will be presented.

Citation Download Citation

J. G. Droessler and D. J. Rotier "Tilted Cat Helmet Mounted Display", Proc. SPIE 1116, Helmet-Mounted Displays, (5 September 1989); https://doi.org/10.1117/12.960893

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