Patent ID: 6473106
Filing Date: 2002-10-29
Classification: B41J

Abstract:
An LED head comprising an LED array of LEDs which emit light according to an image signal and which are arrayed at a resolution pitch P of not less than 600 dpi, and a multi-lens array for forming an emission image of said LED array on an information medium,wherein each of said LEDs of the LED array has a main emission band being an emission spectrum for formation of a main image and a sub emission band apart from a peak wavelength of the emission spectrum of the main emission band, and wherein a difference D between best total conjugate lengths at peak wavelengths of the emission spectrum of the main emission band and an emission spectrum of the sub emission band by said multi-lens array is at least 0.15 mm, and optical adjustment of said LED array and said multi-lens array is implemented so that light of the main emission band is focused in a predetermined imaging relation on a predetermined information medium.