METHOD AND APPARATUS TO DETERMINE FLY HEIGHT OF A RECORDING HEAD

摘要

The invention features a fly height measurement system for measuring fly height of a slider (104) over a storage disc (112). The fly height measuring system includes a source of light (100), a slider (104), a detector module (106) and a processor (108). The source of light (100) produces light along a light path. The slider (104) includes an objective lens positioned such that light from said source hits the objective lens (124) and is directed toward a surface (110) of a disc (112). Light propagating from the disc (112) is directed to a detector (106). The processor (108) estimates the fly height of the slider (104) based on detector module output.