| 摘要 |
<p>PURPOSE:To photograph blood cells moving at a high speed as a clear image with little blurring by rotatively driving a disk with at least one light passing hole to convert the light emitted from a light source into the intermittent light, and controlling this rotation and the position of the light passing hole with the synchronous signal contained in the video signal. CONSTITUTION:The light emitted from a light source 12 is collected by a condensing lens 14 and guided to a light guide 2, a disk 16 rotatively driven by a stepping motor 15 is arranged between the light source 12 and the guide 2, and a light passing hole 17 is provided on the disk 16. The motor 15 is rotatively controlled by a control device 19 via a driving circuit 18. The rotating speed of the disk 16 is matched with the frequency of the video signal constituting each screen with the horizontal synchronous signal of the video signal, for example. When the diameter of the light passing hole 17 formed on the disk 16 is set to the preset size, the pulse width of the light can be properly set. Each screen of the video signal becomes an image obtained at the shutter speed, and a clear image with little blurring is obtained.</p> |
