Share Email Print
cover

Optical Engineering

Balancing detector effects with aberrations in the design of wide-field grazing incidence x-ray telescopes
Author(s): James E. Harvey; Martina Atanassova; Andrey Krywonos
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

Most imaging systems today include a mosaic detector array in the focal plane. Optical designers of astronomical telescopes typically produce a design that yields a superb on-axis aerial image in the focal plane, and detector effects are included only in the analysis of the final system performance. Aplanatic optical designs (corrected for spherical aberration and coma) are widely considered to be superior to nonaplanatic designs. However, there is little merit in an aplanatic design for wide-field applications because one needs to optimize some field-weighted-average measure of resolution over the desired operational field of view (OFOV). Furthermore, when used with a mosaic detector array in the focal plane, detector effects eliminate the advantage of the aplanatic design even at small field angles. For wide fields of view, the focal plane is frequently despaced to balance field curvature with defocus thus obtaining better overall performance. We will demonstrate that including detector effects in the optical design process results in a different optimal (nonaplanatic) design for each OFOV that is even superior to an optimally despaced aplanatic design.

Paper Details

Date Published: 1 June 2006
PDF: 10 pages
Opt. Eng. 45(6) 063003 doi: 10.1117/1.2209215
Published in: Optical Engineering Volume 45, Issue 6
Show Author Affiliations
James E. Harvey, College of Optics and Photonics/Univ. of Central Florida (United States)
Martina Atanassova, College of Optics and Photonics/Univ. of Central Florida (United States)
Andrey Krywonos, College of Optics and Photonics/Univ. of Central Florida (United States)


© SPIE. Terms of Use
Back to Top