Patent ID: 6649313
Filing Date: 2003-11-18
Classification: G03G

Abstract:
An image formation apparatus comprising a photoreceptor which comprises a support and a photosensitive layer formed thereon, wherein when a group of data of N samples of the height x(t) (&mgr;m) of a profile at the interface of said photosensitive layer on the side of said support, measured perpendicular to a horizontal direction of said support, taken at &Dgr;t(&mgr;m) intervals in said horizontal direction, is subjected to Fourier transformation in accordance with formula (1): X&it;â€ƒ&it;(nN&CenterDot;Î”&it;â€ƒ&it;t)=&Sum;m=0N-1&it;â€ƒ&it;x&it;â€ƒ&it;(m&CenterDot;Î”&it;â€ƒ&it;t)&it;â€ƒ&it;exp&it;â€ƒ&it;(-&ii;&it;â€ƒ&it;2&it;â€ƒ&it;Ï€&CenterDot;nN&CenterDot;Î”&it;â€ƒ&it;t&CenterDot;m&CenterDot;Î”&it;â€ƒ&it;t)(1)wherein n and m are each an integer, N=2p in which p is an integer, in a power spectrum represented by formula (2) S&it;â€ƒ&it;(nN&CenterDot;Î”&it;â€ƒ&it;t)=1N&CenterDot;&LeftBracketingBar;X&it;â€ƒ&it;(nN&CenterDot;Î”&it;â€ƒ&it;t)&RightBracketingBar;2(2)I(S) represented by formula (3): I&af;(S)=(1N)&it;&Sum;n=0N-1&it;â€ƒ&it;{S&af;(nN&CenterDot;Î”&it;â€ƒ&it;t)}(3)is calculated as being 6.0Ã—10âˆ’3 or more, in which coherent light is used as writing light for image formation.