| 摘要 |
<p>PURPOSE:To utilize light emission energy effectively by arranging a substrate so that the substrate plane of a fine light emitting segment array and the optical axis of an image forming element are not perpendicular to each other. CONSTITUTION:The direction of an axis O-Y which is the normal direction of a fluorescent dot array(FLDA) 13 as the fine light emission segment array and the direction of the optical axis L-L of a roof-mirror lens array(RMLA) 12 as an image forming element are slanted at a fine angle theta to the normal direction of the plane of the fluorescent dot array 13 as a roof mirror lens array(RMLA) 12 without being held parallel. Consequently, the light emission energy of the fine light emission segment array which is passed through the optical system of the roof mirror lens array(RMLA) 12 can be inputted effectively onto a photosensitive body 1. Namely, the quantity of reflected light of a light path separation mirror 124 is within the range OP1P2 of a hatched part centering on the O-Y axis and the quantity of utilized light increases, so that the brightness on an image plane F can be increased correspondingly. Consequently, the light emission energy can be utilized effectively.</p> |
