Impact of a scene projector array on the nonuniformity of a test article's output image

Brian P. Beecken; Thomas J. McElmurry; Thomas R. Greenlee

doi:10.1117/12.352916

19 July 1999 Impact of a scene projector array on the nonuniformity of a test article's output image

Brian P. Beecken, Thomas J. McElmurry, Thomas R. Greenlee

Proceedings Volume 3697, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing IV; (1999) https://doi.org/10.1117/12.352916
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

The contribution of a scene projector array to the nonuniformity of a test article's output image has been calculated. In addition to the inherent nonuniformity of the detector array, the output image nonuniformity is dependent upon the nonuniformity of the projector array and the relative positions of emitter images on the detector array as determined by the sampling ratio. In order to calculate the predicted output nonuniformity, a weighting function was developed that accounts for the different contributions of one emitter to different individual detector elements. It is through this weighting function that parameters such as the sampling ratio, the fill factor of the detector array, the optical blur of the emitters, and the alignment of the emitters with respect to the detectors affect the nonuniformity. A computer program has been written to numerically approximate the weighting function for a user- defined set of parameters. For realistic parameters, a significant contribution to the nonuniformity was found to occur when certain non-integer sampling ratios are used. This nonuniformity is based solely on the relative positions of the emitter images on the detector array and will occur even if the projector array is completely uniform.

Citation Download Citation

Brian P. Beecken, Thomas J. McElmurry, and Thomas R. Greenlee "Impact of a scene projector array on the nonuniformity of a test article's output image", Proc. SPIE 3697, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing IV, (19 July 1999); https://doi.org/10.1117/12.352916

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