  We developed a tip-tilt system to compensate the turbulence induced image
motion for 1.3 m telescope at Vainu Bappu Observatory, Kavalur. The instrument
is designed to operate at visible wavelength band (480-700 nm) with a field of
view $1^{\prime}\times1^{\prime}$. The tilt corrected images have shown up to
$\approx$ 57% improvement in image resolution and a corresponding peak
intensity increase by a factor of $\approx$ 2.8. A closed-loop correction
bandwidth of $\approx$ 26 Hz has been achieved with on-sky tests and the root
mean square motion of the star image has been reduced by a factor of $\sim$ 14.
These results are consistent with theoretical and numerical predictions of
wave-front aberrations caused by atmospheric turbulence and image quality
improvement expected from a real-time control system. In this paper, we present
the details of the instrument design, laboratory calibration studies and
quantify its performance on the telescope.
