VISION TESTING DEVICE USING MULTIGRID PATTERN

Title:

VISION TESTING DEVICE USING MULTIGRID PATTERN

Document Type and Number:

WIPO Patent Application WO/2012/121556

Kind Code:

A3

Abstract:

The vision testing device of the present invention is a vision testing device for discriminating a satisfactory or a nonsatisfactory testing object by shooting a testing object assembled or mounted during the component assembly process, and comparing the image shot with a previously inputted target image, and comprises: a stage part for fixing or transferring the testing object to the testing location; a lighting part located on the upper portion of the stage part, for providing lighting to the testing object; a center camera part located in the center of the lighting part, for obtaining a 2-dimensional image of the testing object; a grid pattern irradiating part placed on the side section of the center camera part; a vision processing unit for reading the image shot at the center camera part and discriminating satisfactory or non-satisfactory testing objects; and a control unit for controlling the stage part, the grid pattern irradiating part, and the camera part, wherein the grid pattern irradiating part irradiates grid patterns each having periods of different intervals.

Inventors:

PARK CHAN WHA (KR)
OH SANG MIN (KR)
KIM SUNG HYUN (KR)
KOO JA MYOUNG (KR)

Application Number:

PCT/KR2012/001706

Publication Date:

December 20, 2012

Filing Date:

March 08, 2012

Export Citation:

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Assignee:

MER SKILFUL FEAT CO LTD (KR)
PARK CHAN WHA (KR)
OH SANG MIN (KR)
KIM SUNG HYUN (KR)
KOO JA MYOUNG (KR)

International Classes:

G01N21/88; G01B11/25

Foreign References:

JP2008281543A	2008-11-20
KR20020082738A	2002-10-31
KR20090110495A	2009-10-22
JPH11295047A	1999-10-29

Other References: