Method of Cleaning an Optical Face of a Refractive Element for a Near Field Optical Scanning Apparatus and a Cleaning Device for Cleaning an Optical Face of a Refractive Element for a Near Field Optical Scanning Apparatus

摘要

The invention provides a method and a device for cleaning of the optical face of a refractive element for a near field optical scanning apparatus. A magnetically susceptible cleaning material is used to facilitate effective cleaning of the refractive element without damage to the element. The method according to the invention can be combined with known cleaning methods if desired.