| 摘要 |
<p>PURPOSE: To provide a multibeam recording device capable of adjusting the magnification while making a reducing projection lens telecentric to both sides of a light source and a photosensitive body. CONSTITUTION: A reducing projection lens 20 is composed by arranging, in order from the side of a light source 10, a first lens group 21 and a second lens group 22 both of which have positive powers, the reducing projection lens 20 is arranged so as to be telecentric to both sides of a light source part 10 and a photosensitive body P and an adjusting means 40, for adjusting the image forming magnification of the reducing projection lens 20 by moving the second lens group 22 in the direction of optical axis (z), is provided.</p> |
