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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

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HEAD IKI

1:17.3 optical scheme with corrector

This optical scheme is similar to 1:7.7 system but has the different parameters of secondary mirror 2 and corrector 3. Primary mirror 1 reflects light to the secondary mirror 2 which collects it on the focal surface of system. Lens corrector 3 is placed between focal surface and the secondary mirror which allows to obtain large flat linear field of 100 mm diameter.

Focal length, mm
26007
Linear field of view, mm
100
Angular field of view
1o13'
Central screening area, %
17
Concentration of light energy at 632.8 nm wavelength
on the optical axis within the circles of diameter:
0.039 mm, %, at least
67
0.065 mm, %, at least
81
The same at the edge of field of view, at 50 mm from the center,
within the circles of diameter:
0.039 mm, %, at least
66
0.065 mm, %, at least
83