Uniformity results of the multilayer mirrors used in the ALEXIS Ultrasoft X-ray Telescopes.

Unifying distribution functions: some lesser known distributions

Unique space telescope concepts using CFRP composite thin-shelled mirrors and structures

UnISIS: A Laser Guided Adaptive Optics System for the Mt. Wilson 2.5-m Telescope

UnISIS: a laser-guided adaptive optics system for the Mt. Wilson 2.5-m telescope

UnISIS: Laser Guide Star and Natural Guide Star Adaptive Optics System

UnISIS: University of Illinois Seeing Improvement System (UnISIS)--an adaptive optics instrument for the Mt. Wilson 2.5-m telescope

Unit magnification optical system

Unitary and Hermitian phase operators for the electromagnetic field

Universal behavior of the electron g-factor in GaAs/AlGaAs quantum wells

Universal charts for optical difference frequency generation in the terahertz domain

Universal condition for the existence of interface modes in the whole momentum space with arbitrary materials

Universal Description of Spherical Aberration Free Lenses Composed of Positive or Negative Index Media

Universal Dynamics of Kerr Frequency Comb Formation in Microresonators

Universal Electromagnetic Waves in Dielectric

Universal Optical Frequency Comb

Universal output directionality of ultrahigh-Q single modes in a deformed microcavity with low index of refraction

Universal spectrophotometer for determining the efficiency of optical components and systems

University of Mexico adaptive optics program

UnlSlS adaptive optics system at the Mt. Wilson 2.5-m Telescope