Chromatic Aberration Of An All-Reflective Telescope

J Y Le Gall; M Saisse

doi:10.1117/12.966182

9 January 1984 Chromatic Aberration Of An All-Reflective Telescope

J Y Le Gall, M Saisse

Proceedings Volume 0445, Instrumentation in Astronomy V; (1984) https://doi.org/10.1117/12.966182
Event: 1983 Astronomy Conferences, 1983, London, United Kingdom

Abstract

The satellite HIPPARCOS of the European Space Agency aims to build a catalog of the astro-metric parameters of 100,000 stars. The satellite carries a special telescope which scans the sky ; it images the stars on a modulating grid and the angular distance between two stars is deduced from the dephasage between the two modulated signals observed after the grid. The study showed an effect induced by the wavelength dependency of the diffraction. This effect, which occurs even when the system is all-reflective (and so when there is not classical chromatism) has been called "CHROMATICITY". The theoretical reasons of this aberration are explained and numerical values of the HIPPARCOS telescope CHROMATICITY are computed ; the accuracy of the results is then discussed.

Citation Download Citation

J Y Le Gall and M Saisse "Chromatic Aberration Of An All-Reflective Telescope", Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); https://doi.org/10.1117/12.966182

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