| 摘要 |
PURPOSE:To evaluate the solder wettability of a member to be measured without skills by detecting reflected light from said member by a photosensor, and performing arithmetic processing after converting the detection signal into a binary signal. CONSTITUTION:A soldered member 12 to be measured is attached to a supporting device, the surface of this member 12 is irradiated with light from a lamp house 6 through a filter, and the reflected light from the surface is photodetected by a photosensor 3 through a microscope 1. This photosensor 3 is, for example, a 512-bit linear photosensor. A signal converted photoelectrically by the photosensor 3 is supplied to the successively provided binary-coding circuit 42 of a threshold regulator 41 to obtain a binary signal showing the propriety of solder wettability, and only when the signal showing excellent solder wettability arrives, a gate circuit 44 is opened to count it by a measuring arithmetic circuit 46, thereby displaying the result on a display device 47. |
