Patent ID: 8512924

Claim:
An electrophotographic photoreceptor, comprising: an electroconductive substrate; a photosensitive layer overlying the substrate; and a crosslinked surface layer comprising α-alumina and tin oxide, overlying the photosensitive layer, wherein a first one-dimensional data array obtained from measuring a concavo-convex shape of the surface of the photoreceptor with a surface roughness/profile shape measurer is subjected to a first multiple image resolution analysis in which a wavelet conversion is performed on the first one-dimensional data array to separate the first one-dimensional data array into 6 frequency components, HHH, HHL, HMH, HML, HLH and HLL, each having single-cycle lengths of a concavity and a convexity of from 0 to 3, 1 to 6, 2 to 13, 4 to 25, 10 to 50 and 24 to 99 μm, respectively, the one-dimensional data array of the frequency component HLL is further thinned so as to have 1/40data arrays to obtain a second one-dimensional data array, the second one-dimensional data array is further subjected to a second multiple image resolution analysis in which the wavelet conversion is performed on the second one-dimensional data array to separate the second one-dimensional data array into 6 additional frequency components, LHH, LHL, LMH, LML, LLH and LLL, each having single-cycle lengths of a concavity and a convexity of from 26 to 106, 53 to 183, 106 to 318, 214 to 551, 431 to 954 and 867 to 1,654 μm, respectively, and wherein when relationships between respective arithmetic average roughness (WRa) (y-axis) of the 12 frequency components and the frequency components (x-axis) are graphed, at least WRa (LML) and WRa (LHH) have a folding point or a maximum point.