| 摘要 |
<p>PURPOSE:To enable the easy and sure adjustment of the disposing position by providing a guide having the slope inclined in the direction rectangular to the direction of the scanning line to the face plate part of the electron scanning tube and moving the inlet side end face of the focusing type optical transmission body array in contact with the guide. CONSTITUTION:A guide G having a slope is provided on the face plate FP of the electron scanning tube 1. It is so arranged that the angle of its slope becomes theta when the extension line of the main scanning region RPS plane is denoted as L1, the extension line of the optical luminescence spot emitting face FL1 as L2 and the angle formed by both straight lines as 2theta. With the relative positions of the electron scanning tube 1 and recording medium 3 being held suitably fixed, the end part of the array 2 is slided along the slope. As a result of this, the optical axis (for example 5-2) passing the imaging point P on the main scanning region RPS is determined. The adjustment simply necessitates the adjustment of the electron beam so that is comes at the point (q) of intersection of said optical axis and fluorescent film FL. Hence, the adjustment may be done readily and surely.</p> |
