| 摘要 |
<p>PURPOSE:To prevent the dislocation of an image by arranging a half mirror on the optical axis of an image forming lens and setting in that light transmitting the half mirror from a 1st optical element array and making incident on an image forming plane and light reflected by the half mirror and making incident on a 2nd optical element array can pass by the same optical axis. CONSTITUTION:The half mirror 9 is arranged on the optical axis of the image forming lens 8 forming an image of light beams from the 1st and 2nd optical element arrays 10 and 12 arranged zigzag on the image forming plane so that a portion of the light beam from the 1st optical element array 10 transmits and makes incident on the image forming plane, a portion of the light beam from the 2nd optical element array 12 is reflected and makes incident on the image forming plane, and both the beams can be positioned on the same optical axis. Therefore, the light beams from the 1st and 2nd optical element arrays 10 and 12 can be positioned on the same image forming plane. Thus, joint dislocation can be prevented.</p> |
