Method of controlling light intensity in image exposure apparatus

A method of controlling a light intensity in an image exposure apparatus, comprising:

• providing light sources of a umber m which emit light in accordance with image information, said light sources being aligned along a fixed direction so as to be disposed at intervals which are n times a line interval L which is a line interval between main scanning lines on an exposure surface, n being a natural number;
• carrying out main scanning by relatively moving the m light sources with respect to the exposure surface in a direction perpendicular to the direction in which the light sources are arranged,
• carrying out sub-scanning by relatively moving the exposure surface with respect to the m light sources in the direction in which the light sources are arranged by a feed amount of (L×(m−a)) (a is a natural number), m and n being not relatively prime and (m−a) and n being relatively prime, and satisfying the relation m−a)≦(m×n)/2;
• determining an error in a feed amount of photosensitive material in a sub-scanning direction, said error causing an interval between specific main scanning lines to be larger or smaller than L;
• controlling the light intensity of a light source among the m light sources during a main scan subsequent to said specific main scanning lines, said control corresponding to said error in said feed amount.

A method of controlling a light intensity in an image exposure apparatus comprising:

• providing light sources of a n umber m which emit light in accordance with image information, said light sources being aligned along a fixed direction so as to be disposed at intervals which are n times a line interval L which is a line interval between main scanning lines on an exposure surface, n being a natural number;
• carrying out main scanning by relatively moving the m light sources with respect to the exposure surface in a direction perpendicular to a direction in which the light sources are arranged;
• carrying out sub-scanning by relatively moving said exposure surface with respect to said m light sources in the direction in which the light sources are arranged by a feed amount of (L×m);
• determining an error in a feed amount of photosensitive material in a sub-scanning direction, said error causing an interval between specific main scanning lines to be larger or smaller than L;
• and
• controlling the light intensity of a light source among the m light sources during a main scan subsequent to determining said error in said feed amount related to the interval between said specific main scanning lines, said control corresponding to said error in said feed amount.

A method of controlling a light intensity in an image exposure apparatus, comprising:

• providing light sources of a lumber m which emit light in accordance with image information, said light sources being aligned along a fixed direction so as to be disposed at intervals which are n times a line interval which is a line interval between main scanning lines on an exposure surface, n being a natural number;
• carrying out main scanning by relatively moving the m light sources with respect to the exposure surface in a direction perpendicular to the direction in which the light sources are arranged,
• carrying out sub-scanning by relatively moving the exposure surface with respect to the m light sources in the direction in which the light sources are arranged by a feed amount of (L×(m−a)) (a is a natural number), m and n being not relatively prime and (m−a) and n being relatively prime, and satisfying the relation (m−a)≦(m×n)/2;
• determining an error in a feed amount of photosensitive material in a sub-scanning direction, said error causing an interval between specific main scanning lines to be larger or smaller than L;
• controlling the light intensity of a light source among the m light sources during a main scan subsequent to determining said error in said feed amount related to the interval between said specific main scanning lines, said control corresponding to said error in said feed amount.