| 摘要 |
PROBLEM TO BE SOLVED: To reduce loss of light energy which is generated from an LED array. SOLUTION: A plurality of LED eliments 11a are provided on a surface of a substrate 10. While the light emissions of the LED elements are selectively controlled, a photosensitive body on a rotary drum 20 is exposed so as to form an electrostatic latent image. A micro lens 12a which collects the lights of the LED elements 11a of the substrate 10 to the photosensitive body is directly attached to the substrate 10, so that loss of energy until the lights arrive at the photosensitive body is reduced. |
