Third Order Aberrations in Cassegrain-Type Telescopes and Coma Correction in Servo-Stabilized Images
- 1 February 1971
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 10 (2) , 300-303
- https://doi.org/10.1364/ao.10.000300
Abstract
Pointing errors in telescopes carried by space vehicles can be compensated by servo-control of the secondary mirror. This introduces some aberrations in the stabilized image, the magnitude of which depends on the asphericity of the telescope mirrors. A configuration is presented in which the centered image of an off-axis object point is free from coma. The required aspheric corrections and the residual aberrations are calculated. Also included is a summary of the third order aberration constants for some well-known centered cassegrain-type telescopes.Keywords
This publication has 3 references indexed in Scilit:
- A Rocket Telescope Spectrometer with High Precision Pointing ControlApplied Optics, 1969
- Coma of Modified Gregorian and Cassegrainian Mirror SystemsJournal of the Optical Society of America, 1954
- TelescopticsScientific American, 1938