Device and method for detecting scratches

Details Device and method for detecting scratches Device and method for detecting scratches

2005-02-12

2008-11-18

Stafira, Michael P (Department: 2886)

Optics: measuring and testing

Inspection of flaws or impurities

Transparent or translucent material

C356S239700

Reexamination Certificate

active

07453563

ABSTRACT:
The invention relates to a device and a corresponding method for detecting scratches on the surface (2) of a material, in particular glass. Said device comprises an illumination unit (3) and a recording unit (4), which register a scanning line (6) on the surface (2) of the material and can be displaced in relation to said surface (2). In order to more accurately identify scratches, the illumination unit (3) comprises at least one light strip (9), which generates parallel light pools transversally to the scanning line (6), said pools being diffuse or quasi-diffuse along the scanning line (6) and preferably at least one light source (16), which generates a diffuse or quasi-diffuse light transversally to the scanning line (6).

REFERENCES:
patent: 3814946 (1974-06-01), Takahashi et al.
patent: 5598262 (1997-01-01), Jutard et al.
patent: 5745176 (1998-04-01), Lebens
patent: 2 261 460 (1974-06-01), None
patent: 693 07 722 (1997-06-01), None

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