| 摘要 |
PURPOSE:To achieve measuring of the maximum illuminance, an average illuminance, an illuminance distribution and the like accurately. CONSTITUTION:This apparatus is provided with an illuminance adjusting device 12, a screen 16 on which light from a lamp 23 with a mirror 21 mounted on the illuminance adjusting device 12 is projected and a TV camera 17 for picking up the image of light projected on the screen 16. Moreover, an image processor 18 is provided to compute the illuminance of the lamp 23 based on the image picked up with the TV camera 17. The illuminance obtained is compared with a prescribed illuminance predetermined and a signal for moving the lamp 23 in the axial direction of the mirror 21 is outputted when the computed value is not within the prescribed range of illuminance. |
