High angular resolution with rotation shearing interferometers: preliminary results and future potentials.
Abstract
A rotation-shearing interferometer has been designed and constructed which consists of a beam-splitting cube and two phase-compensated roof prisms giving high-contrast, high-luminosity fringes at any rotation angle. A chromatic lens system provides a pupil image with a magnification proportional to the inverse of the wavelength thus permitting the use of large optical bandwidths; the bandwidth is limited by turbulence to a few hundred Angstroms as in speckle interferometry. Visual estimates of the diameter of the star Betelgeuse (alpha Ori) at 10 wavelengths are presented; observations of other stars are also briefly discussed.
- Publication:
-
IAU Colloq. 67: Instrumentation for Astronomy with Large Optical Telescopes
- Pub Date:
- 1982
- DOI:
- 10.1007/978-94-009-7787-7_26
- Bibcode:
- 1982ASSL...92..207R
- Keywords:
-
- Angular Resolution;
- Astrometry;
- High Resolution;
- Holographic Interferometry;
- Beam Splitters;
- Diffraction Patterns;
- Image Reconstruction;
- Stellar Spectra;
- Visual Observation;
- Astronomy;
- Interferometry