Light source module

A light processing method, comprising:

• arranging respective light axes of a first semiconductor laser and a second semiconductor laser are parallel to each other;
• directing a first light beam and a second light beam respectively emitted by the first semiconductor laser and the second semiconductor laser to enter a light beam combining element;
• and
• emitting the first light beam and the second light beam with respective light axes made closer to each other by the light beam combining element from the light beam combining element, wherein
• an air conversion length of a first total distance from a first light emitting surface of the first semiconductor laser to an exit surface of the light beam combining element, and an air conversion length of a second total distance from a second light emitting surface of the second semiconductor laser to the exit surface of the light beam combining element are equal to each other.

An image forming device, comprising:

• a light source module, comprising:
• a first semiconductor laser and second semiconductor laser arranged so that respective light axes are parallel to each other;
• and
• a light beam combining element in which a first light beam and a second light beam respectively emitted by the first semiconductor laser and the second semiconductor laser enter, the light beam combining element configured to emit the first light beam and the second light beam with respective light axes made closer to each other, wherein
• an air conversion length of a first total distance from a first light emitting surface of the first semiconductor laser to an exit surface of the light beam combining element, and an air conversion length of a second total distance from a second light emitting surface of the second semiconductor laser to the exit surface of the light beam combining element are equal to each other.