'Matching error' (spherical aberration) in the Hubble Space Telescope (HST) - Some technical comments

Details 'Matching error' (spherical aberration) in the Hubble Space Telescope (HST) - Some technical comments 'Matching error' (spherical aberration) in the Hubble Space Telescope (HST) - Some technical comments

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990msngr..61...22w&link_type=abstract

ESO Messenger (ISSN 0722-6691), no. 61, Sept. 1990, p. 22-24.

Physics

Optics

4

Geometrical Optics, Hubble Space Telescope, Image Processing, Instrument Errors, Root-Mean-Square Errors, Performance Tests, Wave Fronts

Scientific paper

An analysis is presented of the systematic error revealed in the HST that has a systematic error giving an image with approximately 70 percent of the geometrical light energy within about 1.5 arcsec diameter instead of less than 0.1 arcsec predicted from its specification of 'diffraction limited performance' for visible light (wavelength 500 nm). This error has been identified as principally spherical aberration due to 'matching error'. It is calculated that the spherical aberration error alone would give an image at best focus with 100 percent of the geometrical light energy within about 1.5 arcsec diameter.

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