The Glass Meridian Circle
Open Access
- 1 January 1986
- journal article
- Published by Cambridge University Press (CUP) in Symposium - International Astronomical Union
- Vol. 109, 413-419
- https://doi.org/10.1017/s0074180900076841
Abstract
Some aspects of the design for a Glass Meridian Circle with 24 cm aperture are presented and discussed. Tangential ventilation will be used to minimize tube refraction. The air for the ventilation will be filtered and it will provide a clean atmosphere around all optical and critical mechanical components, thus improving reliability. The base frame and piers are particularly stable thanks to a sharp separation between parts with short and long thermal time constants. The instrument is compact and portable and it requires only a small dome.Keywords
This publication has 3 references indexed in Scilit:
- Internal Refraction in Meridian CirclesPublished by Springer Nature ,1986
- Thermal and aerodynamical analysis of a meridian buildingInternational Astronomical Union Colloquium, 1978
- Modern Developments of the Meridian Circle (Invited Paper)Symposium - International Astronomical Union, 1974