LED head, image forming apparatus, and method of measuring amount of light from LED array

摘要

An object is to provide an LED printer head capable of reducing influence of a sub emission band by use of a rode lens array and thus prevent light of the sub emission band from reaching a development level. The LED printer head consists of an LED array of LEDs to emit light according to an image signal, and a multi-lens array for forming an emission image of the LED array on a photosensitive body. Each of the LEDs has a main emission band and another sub emission band having a peak level and a difference D between best TCs at peak wavelengths of the main and sub emission bands by the multi-lens array is at least 0.15. <IMAGE>