
298 11. Transfer Functions; Hubble Space Telescope
NOTE: The material in Section ll.l.c of the 1st edition has been incorporated
into Section 10.4 of
this
edition. The preceding paragraph appeared in Section
11.3 of the 1st edition and is now located where it properly belongs. A discussion
related directly to the last sentence of
the
preceding paragraph follows.
11.3.
HUBBLE SPACE TELESCOPE, POSTLAUNCH REALITY
Contrary to the predicted diffraction-limited performance, actual images taken
with HST shortly after launch were seriously deficient
in
quality, even after
repeated attempts to improve the quality by refocusing the telescope. After carefii ...