Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1993-03-26
1995-09-12
Hille, Rolf
Optics: measuring and testing
By polarized light examination
With light attenuation
356375, 356380, 356381, 356394, G01B 1124, G01B 1128, G01B 1114
Patent
active
054502047
ABSTRACT:
An inspecting device inspects the printed state of cream solder by projecting a plurality of light patterns varying in phase onto a printed circuit board printed with cream solder, and processing signals obtained by an image pick-up device for picking up the image on the surface of the printed circuit board using a phase shifting method. A printed position, area, thickness or amount of the cream solder can be detected. By comparing the data thus obtained with reference data, the printed state is evaluated. The printed state of the cream solder may be examined quickly and positively, while a continuous automatic processing can be effected without stopping the mounting process of the printed circuit board in a production line.
REFERENCES:
patent: 3627427 (1971-12-01), Johnson et al.
patent: 4212073 (1980-07-01), Balasubramanian
patent: 4641972 (1987-02-01), Halioua et al.
patent: 4794550 (1988-12-01), Greivenkamp, Jr.
patent: 4984893 (1991-01-01), Lange
patent: 5064291 (1991-11-01), Reiser
patent: 5069548 (1991-12-01), Boehnlein
patent: 5088828 (1992-02-01), Doemens et al.
patent: 5103105 (1992-04-01), Ikegaya et al.
patent: 5118192 (1992-06-01), Chen et al.
patent: 5166753 (1992-11-01), Tokura
patent: 5192983 (1993-03-01), Tokura
patent: 5202749 (1993-04-01), Pfister
patent: 5206705 (1993-04-01), Tokura
patent: 5267217 (1993-11-01), Tokura et al.
patent: 5298977 (1994-03-01), Shintani et al.
patent: 5307151 (1994-04-01), Hof et al.
patent: 5307152 (1994-04-01), Boehnlein et al.
Iwata Yutaka
Kakimori Nobuaki
Kishimoto Shin
Nishigaki Kengo
Shigeyama Yoshihide
Hille Rolf
Ostrowski David
Sharp Kabushiki Kaisha
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