SEMICONDUCTOR LASER DIODE, PRINTER HEAD, AND IMAGE FORMING APPARATUS EMPLOYING THE SAME

摘要

PURPOSE: A semiconductor laser diode, a printer head using the same, and an image forming apparatus employing the same are provided to radiate the light which has Gaussian light distribution by forming the convexo-concave pattern on the periphery part. CONSTITUTION: A semiconductor laser diode(50) comprises an unevenness pattern(51) arranged on the periphery of the resonator. The unevenness pattern is formed on the periphery of the semiconductor laser diode. The unevenness pattern comprises a convex part(51a) arranged along the periphery of the laser diode and a concave part(51b).