ATLAS: a Cassegrain spectrograph based on volume phase holographic   gratings
  We are proposing a new spectrograph (ATLAS) which would revolutionise intermediate-dispersion observations at the AAT. Based on the new technology of Volume Phase Holographic gratings, and using transmission optics, ATLAS offers high throughput and a wide field (24'). It will be ideally suited to extensive surveys of faint objects. It has been designed with a collimated beam diameter of 150 mm, giving resolution lambda/delta lambda up to nearly 10,000 with a 1.5 arcsecond slit and good efficiency. It will be a dual-beam instrument, to maximise observing speed and allow optimised optical coatings to be used. The project is working towards its Concept Design Review which will occur during 2000. 
J.G. Robertson (AAO and U Sydney), K. Taylor (AAO), I.K. Baldry (AAO),   P.R. Gillingham (AAO) and S.C. Barden (NOAO)