| 摘要 |
PURPOSE:To attain recording proportional to the movement distance of a light source without reference to a moving speed by automatically measuring the illumination-intensity distribution of the light source while moving the light source, by generating a sweep signal proportional to the movement distance of the light source. CONSTITUTION:On original surface 16, photodetection part 3 consisting of speed detection sensors 4 and 5 and illumination-intensity detection sensor 6 arrayed sequentially in the movement direction of light source 17 is arranged and sensor 4, when light source 17 reaches point (a), generates light signal 18, permitting the 1st integrator 11 to start integration. On the other hand, sensor 5, when light source 17 reaches point (b), stops the integration of the 1st integrator 11. Since the interval between positions (a) and (b) of light source 17 is equal to fitting interval l1 between sensor 4 and 5, denoting the moving speed of light source 17 as V represents output V1 of the 1st integrator 11 as shown by expression I. Output V1 is passed through analog divider 13 to obtain output V2 proportional to moving speed V. In the constitution like this, the illumination-intensity distribution recorded by recorder 8 can be recorded on a scale proportional to the movement distance of light source 17 without reference to the moving speed of light source 17. |
