| 摘要 |
PROBLEM TO BE SOLVED: To make formation of a lens array easier.SOLUTION: An exposure device includes a first lens plate in which a first lens forming an intermediate image which is a reduced inverted image of an object is arrayed in a plurality of numbers along a length direction to constitute a first row and a second row, a second lens plate in which a second lens forming an enlarged inverted image of the intermediate image on a light receiving surface is arrayed in a plurality of numbers along the length direction being the same as the array direction of the first lens, and a plurality of light emitting elements arrayed in the same length direction as the array direction with an interval PD being kept. The number of first lenses is at least 80% the total number of the first lenses, where, the first lens satisfies 0<s<(m÷(1-m)×PD), in which a magnification (m) of the first lens is the size of the intermediate image relative to the size of the object and (s) is a deviation of array interval between the first lens constituting the first row in the array direction and the first lens constituting the second row.SELECTED DRAWING: Figure 5 |
