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RTT150 Technical Description  
RTT150, main page
RTT150
Russian-Turkish 1.5-m Telescope
 
High energy Astrophysics department of IKI, Moscow
International astrophysical observatory Spectrum-X-Gamma
International astrophysical space observatory INTEGRAL

(C) Copyright 
HEAD IKI

1:3 optical scheme

(with Meinel camera)

System is built on "quasi-Ritchey-Chretien" scheme. 5-lens focal reducer is used to increase focal ratio to 1:3.

Reducer was intended to use photographic plates with focal plane being at only 3 cm distance from the last lens. That's why this system cannot be used for observations with standard size CCD-based detectors.

Focal length, mm 4519
Linear field of view, mm
79
Angular field of view
1o
Central screening area, %
25.8
Concentration of light energy at 632.8 nm wavelength
on the optical axis within the circles of diameter:
0.022 mm, %, at least
86
0.043 mm, %, at least
91
The same at the edge of field of view, at 39.5 mm from the center,
within the circles of diameter:
0.022 mm, %, at least
58
0.043 mm, %, at least
77