Recognition device

Abstract

Abstract PURPOSE:To detect a light image at a high SN ratio by alternating a reflected light source and transmitted light source which illuminate a pattern on a ceramic substrate of hybrid IC. CONSTITUTION:To detect the light image of wiring pattern 4 on IC chip 3 of hybrid IC, illumination light source change-over circuit 19 opens shutter 12 and light from reflected light source 11 is projected on IC chip 3 through half-mirror 15. The reflected light image is detected by image pickup element 16 and binary-coded by preprocessing circuit 17, and pattern detecting circuit 18 detects its position. To detect the light image of wiring pattern 2 on a ceramic substrate, illumination light source change-over circuit 19 opens shutter 14 to irradiate substrate 1 with light from transmitted light source 13. Thus, the light images are detected at high SN ratios and detection are reduced.

Inventors

• 👤 Masahito Nakajima
• 👤 Tetsuo Hizuka
• 👤 Yushi Inagaki

Bibliographic Details