Recently we have derived the angular spectrum transfer function (ASTF) for photon scanning tunneling microscope and collection mode scanning near field optical microscope (collection-SNOM) under dark illumination (Proc. SPIE, Vol. 3467, 23 to approximately 33). The present paper discussed image restoration using the ASTF. It was found that the key to achieve better restoration is to find a ASTF as close to that of the system as possible, which then depends on the determination of tip size, tip sample distance, incident angle of illuminating laser beam, etc. When low values are used for tip dia...
