Astronomical optics

the long version

"This book provides a unified treatment of the characteristics of telescopes of all types, including telescopes whose performance is set by geometrical aberrations and the effect of the atmosphere, and those diffraction-limited telescopes designed for observations from above the atmosphere. The emphasis throughout is on basic principles, such as Fermat's principle, and their application to optical systems specifically designed to image distant celestial sources. Astronomical Optics, Second Edition also contains thorough discussions of the principles underlying all spectroscopic instrumentation, giving special emphasis to grating instruments used with telescopes. An introduction to adaptive optics provides the needed background for further inquiry into this rapidly developing area."--BOOK JACKET.