36 citations · 490 across the 45 of their papers we have counts for
5 papers · 2 filters
Astronomical Research with liquid mirror telescopes
E. F. Borra
I discuss the modalities of zenith observing with LMTs, their limitations and advantages. The main limitation comes from the relatively small regions of the sky that LMTs can acces…
Liquid Mirror Telescopes: A Review
E. F. Borra
I review the present status of liquid mirror telescopes. In a nutshell: LMTs do work and several have been built and used. Extensive interferometric tests of liquid mirrors (the la…
Optical Tests of a 2.5-m diameter Liquid Mirror: Behavior under External Perturbations and Scattered Light Measurements
Luc Girard, Ermanno F. Borra
Interferometric tests of a f/1.2 2.5-m diameter liquid mirror show RMS surface deviations about wave/20 and Strehl ratios of order 0.6, showing that it is diffraction limited. The…
Detection of Gravitational Lenses and Measurement of Time Delays from Classical Electromagnetic Radiation Fluctuations
Ermanno F. Borra
I suggest that measurements of intensity fluctuations caused by classical wave interactions can be used to find unresolved gravitational lenses and determine time delays of essenti…
A corrector design using active vase mirrors that allows a fixed telescope to access a large region of the sky
Gilberto Moretto, Ermanno F. Borra
We investigate whether a three-mirror system, having secondary and the tertiary mirrors with surfaces warped by Zernike polynomials generated by active vase mirrors, is suitable to…