Abstract

To avoid the image-deteriorating heat flow around the telescope, a new type of solar Coudé refractor (aperture 35 cm, equivalent focal length 15 m) has been developed which does not need a dome but which is nevertheless protected from the wind and weather. This is achieved by enclosing the telescope proper within a second tube which is independently mounted and guided. The construction of the instrument guarantees free circulation of air around the prime objective.

© 1964 Optical Society of America

The McMath Solar Telescope of Kitt Peak National Observatory

A. Keith Pierce
Appl. Opt. 3(12) 1337-1346 (1964)

High Altitude Observatory’s New Coronagraph and Spectrograph

Joseph H. Rush and George K. Schnable
Appl. Opt. 3(12) 1347-1352 (1964)

An Evacuated Tower Telescope

Richard B. Dunn
Appl. Opt. 3(12) 1353-1357 (1964)

Spectrostratoscope: A Balloon-Borne Solar Observatory

K. O. Kiepenheuer and J. P. Mehltretter
Appl. Opt. 3(12) 1359-1361 (1964)

A Double-Pass Pfund Spectrograph for Solar Research

Walter E. Mitchell and Orren C. Mohler
Appl. Opt. 3(4) 467-478 (1964)