| 摘要 |
PURPOSE:To reduce loss of illuminance without deteriorating image quantity, by projecting and focusing lights emitted from the bright points of at least 2 solid light emitting elements through an image-forming optical system on the almost same position of a photoreceptor. CONSTITUTION:Lights emitted from the bright points of 2 solid light emitting elements are projected and focused on a photoreceptor 3 at right angles through a dichroic mirror 12 and a light convergent transmitting body SLA 2. At that time, a dichroic prism 13 may be used in place of the mirror 12, and the light emitted from the bright point of the element 1 may be projected and focused through dichroic mirrors 12, 12' and an optical system DMLA consisting of a lens array 8, a mirror array 9, and a mirror 10 rectangularly on the photoreceptor 3. At that time, distance between the element 1 and the photoreceptor can be effectively enlarged as compared with the case using the convergent light transmitted body SLA. |
