In this work, we demonstrate the functionality of optical limiting obtained with CdTe nanocrystals embedded in polystyrene. This functionality relies on our experimentally observed large, saturable, and controlled nonlinear optical properties of CdTe nanocrystals with sizes around 2nm, at laser wavelength of 532nm. Our investigation is presenting an experimental proof of concept. The limiting threshold occurs at an average laser power of 10mW. For laser beam diameter of 1mm, the threshold intensity for this optical limiting device is ~ 1W/cm 2 .