National Large Solar Telescope

Instrument Rotating Table (IRT)

The purpose of providing Instrument Rotating Table (IRT) is to counter-rotate the table to compensate for the focal plane image rotation caused by the alt-azimuth telescope mount movement. This IRT table will have servo controlled optical benches fixed on to its floor. Optical instruments are assembled on these optical benches which are aligned with respect to the focused beam coming after mirror M7.

Figure 3 Location of IRT inside the building