The UCB/MPE Cassegrain Submillimeter Heterodyne Spectrometer
The UH Curvature Based Adaptive Optics Instrument
The UH Experimental Adaptive Optics System: First Telescope Results with a Photon-Counting Avalanche Photodiode Array
The UK 3.8m Infrared Telescope (UKIRT): from Light Bucket to the Diffraction Limit
The UK 4.2 metre optical telescope
The Ultimate Fundamental Limits of Nonlinear-Optical Phenomena
The Ultimate Mid-Life Crisis: Active Accretion of Gas and Dust and Planet-Formation around Old Stars
The Ultra High Resolution XUV Spectroheliograph. II - Predicted performance
The ultracompact H II region G5.97-1.17 - an evaporating circumstellar disk in M8
The ultraviolet markings on Venus - an analysis of the Venera 9 data
The unified theory of chirped-pulse oscillators
The United Kingdom's giant infrared reflector
The universal formula computing the position of subaperture spot image for Shack-Hartmann wavefront sensor
The University of Arizona/Lockheed Martin Conceptual Study of the NGST Science Instrument Module
The University of Cologne 3-m radio telescope
The University of Colorado OSO-8 spectrometer experiment. I - Introduction and optical design considerations
The University of Hawaii adaptive optics system. I - General approach
The University of Hawaii adaptive optics system. II - Computer simulation
The University of Hawaii adaptive optics system. III - The wavefront curvature sensor
The university telescope and observatory