| 摘要 |
In an image measuring device that performs, on a work piece to be measured, low brightness continuous illumination and one of stroboscopic illumination and continuous illumination with high brightness, a common high-brightness LED is used, and driving circuits are switched between pseudo-continuous illumination and one of stroboscopic illumination and continuous illumination. In the pseudo-continuous illumination, an average brightness is reduced by pulse lighting. In the stroboscopic illumination, high brightness light is emitted instantaneously. The switching between the pseudo-continuous illumination and one of the stroboscopic illumination and continuous illumination may be performed by changing a lighting cycle of the high-brightness LED. |
