| 摘要 |
<p>PURPOSE:To decrease dispersion in luminous quantity of a minute luminescent segment by providing a transparent member uniformizing the luminous quantity distribution on a photosensitive body over the direction of array. CONSTITUTION:A transparent member 27 is provided in an optical path between a dust proof glass 26 of a light write unit 13 and a photosensitive body 12. When the luminous quantity distribution of the light generated from a fluorescent body dot array 14 in the direction of the array has high brightness at both ends and low brightness in the middle, the distribution of transmittivity is provided to the transparent member 27 such that the brightness is low at both ends in the direction of array and high in the middle. Even when the dispersion as above exists in the luminous quantity distribution of the light generated from the fluorescent dot array 14 by interposing the transparent member 27 in the optical path, the light is transmitted with much attenuation toward the ends and the luminous quantity is similar to that in the middle. Then the luminous quantity distribution on a main scanning line on the photosensitive body 12 is uniformized.</p> |
