Comparison of an NVG model with experiments to elucidate temporal behaviour

Paul J. Thomas; Robert S. Allison; Sion Jennings; Todd Macuda; James Zacher; Henok Mehbratu; Richard Hornsey

doi:10.1117/12.719685

1 May 2007 Comparison of an NVG model with experiments to elucidate temporal behaviour

Paul J. Thomas, Robert S. Allison, Sion Jennings, Todd Macuda, James Zacher, Henok Mehbratu, Richard Hornsey

Proceedings Volume 6557, Head- and Helmet-Mounted Displays XII: Design and Applications; 65570T (2007) https://doi.org/10.1117/12.719685
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

Expected temporal effects in a night vision goggle (NVG) include the fluorescence time constant, charge depletion at high signal levels, the response time of the automatic gain control (AGC) and other internal modulations in the NVG. There is also the possibility of physical damage or other non-reversible effects in response to large transient signals. To study the temporal behaviour of an NVG, a parametric Matlab model has been created. Of particular interest in the present work was the variation of NVG gain, induced by its automatic gain control (AGC), after a short, intense pulse of light. To verify the model, the reduction of gain after a strong pulse was investigated experimentally using a simple technique. Preliminary laboratory measurements were performed using this technique. The experimental methodology is described, along with preliminary validation data.

Citation Download Citation

Paul J. Thomas, Robert S. Allison, Sion Jennings, Todd Macuda, James Zacher, Henok Mehbratu, and Richard Hornsey "Comparison of an NVG model with experiments to elucidate temporal behaviour", Proc. SPIE 6557, Head- and Helmet-Mounted Displays XII: Design and Applications, 65570T (1 May 2007); https://doi.org/10.1117/12.719685

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