Alë ibn Khalaf () was an Andalusian astronomer who belonged to the scientific circle of á¹¢ÃÂÿid al- Andalusë.
He devised, with help from al-Zarqali, the universal astrolabe. Both Khalaf and al-Zarqali's design were included in the Libros del Saber (1227) of Alfonso X of Castile.