Related Experiment Video
Updated: Jun 8, 2026
10:35
Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
Combined approach to the Hubble Space Telescope wave-front distortion analysis
Applied Optics
|September 11, 2010
Summary
Hubble Space Telescope stellar images revealed wave-front distortion, with combined algorithms accurately measuring spherical aberration. Primary mirror issues and slight camera misalignment were identified as key factors.
Area of Science:
- Astronomy and astrophysics
- Optical engineering
- Telescope optics
Background:
- Accurate wave-front distortion analysis is crucial for optimizing telescope performance.
- The Hubble Space Telescope (HST) requires precise optical characterization for its advanced imaging capabilities.
Purpose of the Study:
- To estimate wave-front distortion in Hubble Space Telescope (HST) images.
- To identify the sources of optical aberrations and potential misalignments within the telescope system.
Main Methods:
- Analysis of stellar images captured at multiple focus positions using the HST's planetary camera.
- Application and comparison of various algorithms for wave-front distortion estimation.
- Reconstruction of telescope pupil plane illumination.
Main Results:
- A consistent spherical aberration of -0.290-µm root mean square (rms) was measured using the most accurate algorithms.
- The primary mirror was identified as the main contributor to the observed spherical aberration.
- Evidence of a slight camera misalignment was detected through pupil plane illumination reconstruction.
Conclusions:
- Combining multiple algorithms enhances the accuracy of wave-front distortion analysis.
- The primary mirror's optical quality is a significant factor in the measured spherical aberration.
- Potential camera misalignment requires further investigation for optimal HST performance.
