Surface-emission laser array, optical scanning apparatus and image forming apparatus

A surface-emission laser array comprising a plurality of surface-emission laser diode elements forming a two-dimensional array,

• wherein there are provided a plurality of columns of said surface-emission laser diode elements including therein at least two surface-emission laser diode elements in a first direction, such that said column of surface-emission laser diode elements is disposed in plural number in a second direction perpendicular to said first direction,
• said plurality of the surface-emission laser diode elements are disposed with an equal interval in said first direction,
• said plurality of surface-emission laser diode elements are disposed such that an interval between two adjacent columns of said surface-emission laser diode elements is larger in a central part than in a peripheral part of said two-dimensional array of said surface-emission laser diode elements in said second direction,
• a number of said columns being larger than a number of said surface-emission laser diode elements included in one column.