Patent ID: 8298733
Filing Date: 2012-10-30
Classification: G03G

Abstract:
1. An electrophotographic photosensitive member, that is mountable in an electrophotographic apparatus including a coherent exposure light source, comprising: a conductive substrate having a roughened surface which is roughened by a sand blasting process to provide a sand-blast-roughened surface; a metal oxide-containing undercoat layer coated on the sand-blast-roughened surface and having a film thickness d within a range of 1.5 μm≦d≦3.5 μm; and an organic photosensitive layer coated on the metal oxide-containing undercoat layer; wherein the electrophotographic photosensitive member satisfies a condition Sp≦10, and Sp is determined by (a) measuring a surface reflectance of coherent light from the electrophotographic photosensitive member at a plurality of predetermined wavelength intervals of width Δλ within a wavelength range of 750 nm≦λ≦812 nm to obtain a measured surface reflectance; (b) correcting the measured surface reflectance to obtain a corrected reflectance I  wherein i represents √−1, n and m represent integers, and N represents N=2  and (c) determining a peak value of the power spectrum |S(n/(N·Δλ))| (d) setting the peak value of the power spectrum |S(n/(N·Δλ))|