Wide Field

Wide-Field Spectroscopy

E. KONTIZAS Astronomical Institute National Observatory of Athens P. O. Box 20048 Athens GR-1181O GREECE The international conference on "Wide-Field Spectroscopy" and its sub ject matter were agreed during the general assembly of the International Astronomical Union (IAU) in August 1994 by the Working Group of Com mision 9 "Wi de-Field Imaging". This meeting gave an opportunity to world experts on this subject to gather in Athens, in order to discuss the cur rent exploitation and the impending opportunities that exist in the area of multi-object spectroscopy, with particular emphasis on: 1. Astronomical instruments, data acquisition, processing and analysis techniques. 2. Astrophysical problems best tackled through wide-field, multi-object spectroscopy. The new fibre optic technology offers an important tool for the advancement of basic research and the development of industrial applications. Astronom ical spectroscopy is a field of astronomy which has contributed much to the advancement of fundamental physics. The spectra of hot stars have been used to determine the well-known Balmer formula for the wavelength of hydrogen lines, in the late 19th century. Since then, spectroscopy has made enormous progress in stellar atmosphere studies, in kinematics, and in the detection of high redshifts in the Universe. The traditional techniques of obtaining wide-field spectroscopic data are based on slitless spectroscopy (objective prism). Several observations, world wide, make use ofthese tech niques in order to obtain information on the spectral properties of objects in large areas of the sky.

Wide Field Surveys in Cosmology

Atlas of Wide-Field Retinal Angiography and Imaging

Written by experts in the field of ophthalmology, this new text assists in understanding new imaging technology and the clinical information it can provide. It allows the reader to review numerous images of various pathologies and would be of interest to retina specialists and ophthalmologists. Retinal imaging has undergone dramatic changes in the last decade, characterized by constantly improving image resolution, most notably, as it applies to macular diseases, thanks to ever evolving optical coherence tomography. However, imaging retina outside of the vascular arcades has come a long way with advent of new cameras and lenses. The most profound change has been the introduction of wide-angle angiography, which has demonstrated pathologies previously not seen or suspected and gives rise to new theories of pathophysiology of some retinal diseases. Understanding this new imaging technology and the clinical information it can provide requires a basis of knowledge and experience in associating the findings with other clinical signs in the eye and the rest of the body. Atlas of Wide-Field Retinal Angiography and Imaging helps with this experience by allowing the reader to review numerous images of various pathologies and analyzes angiographic findings in the retinal periphery. Furthermore, as this technology increasingly fills ophthalmologists’ offices around the world, this book will prove to be an invaluable resource, written by experts in the field for retina specialists and ophthalmologists.​