Using in-flight images to model the centroid distortion in the LOng-Range Reconnaissance Imager (LORRI)

R. T. McMichael; J. Bentley

doi:10.1117/12.929148

11 October 2012 Using in-flight images to model the centroid distortion in the LOng-Range Reconnaissance Imager (LORRI)

R. T. McMichael, J. Bentley

Proceedings Volume 8486, Current Developments in Lens Design and Optical Engineering XIII; 848602 (2012) https://doi.org/10.1117/12.929148
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

The purpose of this investigation is to understand the causes and implications of centroid distortion in the LORRI instrument on the New Horizons spacecraft. First, an introduction to the New Horizons space program is provided, and the design specifications of the LORRI telescope are discussed. Next, a general theory of perfect imaging is presented, with emphasis on the paraxial equations for the transfer of the chief ray, and the shape of the diffraction-limited point spread function (PSF). Centroid distortion is then defined with respect to these quantities, and methods for quantifying centroid distortion are explained. The nominal LORRI design is analyzed, and the centroid distortion predicted by the nominal design is shown. Astrometric reduction is then performed on a set of twenty in-flight LORRI images, and the actual centroid distortion of the telescope is modeled. Finally, Monte Carlo tolerancing techniques are used to attribute the differences between the predicted centroid distortion and the in-flight centroid distortion to a set of specific manufacturing tolerances.

Citation Download Citation

R. T. McMichael and J. Bentley "Using in-flight images to model the centroid distortion in the LOng-Range Reconnaissance Imager (LORRI)", Proc. SPIE 8486, Current Developments in Lens Design and Optical Engineering XIII, 848602 (11 October 2012); https://doi.org/10.1117/12.929148

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