1 Two problems are created by a weight deformation and temperature deformation of construction elements 1. The precision orientation of radio telescope.

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1 Two problems are created by a weight deformation and temperature deformation of construction elements 1. The precision orientation of radio telescope axis is difficult. The direction angles azimuth AZ and elevation ME for the axis of a Main Mirror are not equal required values. The reason is a deformation of elements.

2 The way of this problems deciding is to make some special systems 1. The systems for measuring the deviation of the mirror axis relative the correct values AZ, ME. The necessary accuracy is 1.5 angle seconds.

3 There are design features, which complicates realisation of measuring systems: 1. It is nothing the direct sight on internal constructions of Main Mirror from the ground. Therefore the systems for measurement of angles AZ and ME and for control mirror surface are realised as a "internal" type systems. Some project of the radio telescope is designing by Russia at Suffa (Uzbekistan).

4 A high accuracy directional Gyroscope Gage is located in a point of crossing main axes of telescope rotation. It is base for measure angles AZ, ME. 2. It is necessary.to measure the angular position Base Ring relatively Gyroscope Gage Метрологическа я основа RT 70

5 Схема угловых ME измерений Electric - mechanical sensor Rotate part of Gauge ME HORIZONT Gyroscope Platform ME Basic Ring Main Mirror

6 Схема автоколлимационной системы Rotate part of Gauge HORIZONT Gyroscope Platform MEME Basic Ring Main Mirror Autocollimator Reflector

7 Необходима система для измерения угловой позиции Базового Кольца относительно поворотной части Гироскопа Эта система использует автоколлимационный метод включающий Автоколлиматор, и специальный Ретрорефлектор Ретрорефлектор расположен на поворотной части Гироскопа. Автоколлиматор расположен с нижней стороны несущей базы.

8 Практическая схема универсального канала

9 1. Отражатель находиться на исследуемом объекте, а Автоколлиматор зафиксирован на базе. 2. Автоколлиматор состоит из Коллиматора и Угловой измерительной системы. Из коллиматора выходит луч Если контролируемый объект и отражатель поворачиваются на угол отраженный луч поворачивается на угол 4. Отклонение направления луча 2 измеряется автоколлиматором. Схема автоколлимационного метода

10 Рабочее расстояние от автоколлиматора до объекта не может превышать м. Существуют две основные проблемы данных угловых измерений mirror Связь между углом отклонения отраженного луча и угол падающий на отражатель определяется выражением: Связь между линейным смещением падающего пучка и угловым смещением отраженного пучка определяются выражением: d L

11 Проблема виньетирования на оправе

12 Проблема виньетирования на оправе

13 Проблема виньетирования на оправе

14 Проблема виньетирования на оправе