Method and a device for inspecting bodies having a multiplicity

Details Method and a device for inspecting bodies having a multiplicity Method and a device for inspecting bodies having a multiplicity

1979-04-11

1982-03-16

Church, Craig E.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

356239, G01N 2116

Patent

active

043198406

ABSTRACT:
A method of inspecting bodies having a multiplicity of parallel channels extending therethrough according to the invention comprises steps of irradiating light beams onto one end of the body in an axial direction of the channels to project an image of the body on a screen and finding defects such as plugged channels or invisible cracks judging from dark or bright portions in the projected image.
A device for carrying out the method according to the invention comprises transferring means intermittently driven and carrying at an interval the bodies, a projector for irradiating light beams onto one end of the body, a screen opposing to the other end of the body, and a detector for finding defective bodies with the aid of bright or dark portions of a magnified image transmitted from the screen.

REFERENCES:
patent: 3620630 (1971-11-01), Hergenrother
patent: 3826923 (1974-07-01), Tremble
patent: 4008967 (1977-02-01), Kiemle

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