Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://hea.iki.rssi.ru/AZT22/ENG/to_opt.htm
Дата изменения: Wed Feb 18 14:45:25 2004 Дата индексирования: Mon Oct 1 22:04:51 2012 Кодировка: Поисковые слова: ngc 7023 |
![]() |
Russian-Turkish 1.5-m Telescope |
||||||||||||||||||||||||||||||||||||||||||||||||||
![]() ![]() ![]()
(C) Copyright
|
Telescope's optical systems
The needed optical scheme is achieved by installing appropriate secondary hyperbolic mirror, blends and correcting lenses (if they are used in a given scheme). To use the Coude focus the removable flat diagonal mirror is also needed in the crossing point of declination axis and main optical axis of telescope. This mirror reflects the converging beam of light to the system of 3 mirrors placed inside the base yoke and after reflecting from the latter of them light is going downwards along the polar axis. Replacment of secondary hyperbolic mirrors is performed at the tube of telescope in horizontal position using the dome crane. To protect the gear of declination axis from hits and shakes during the change of secondary mirrors or during removal/installation of main mirror cell, the yoke base with declination axis drive has fixing element which allows to hold the telescope tube in horizontal and vertical positions. All drives, both on hour and declinations axis, are placed in the base. To protect the telescope from the possible seismic affects the couplings are provisioned which fix the telescope mount. |