Operative principle

The operative principle of the Finish inspection is applied, in a similar way, to the more complex case of check of the status of the glass threads.  In this case, light is generated by an illuminator on top of the finish.   A reflected image enters two optic systems in opposition, left and right side of the thread. Optic systems include linear arrays of pixels.  Images are processed rejoining the individual segments and comparing the pixels in white colour (maximum contrast) with defined limits.   A finish is considered defective when the arc of light is fragmented and out of the limits.  Special statistical algorithms, allow to recognizes as a correct finish, also those where the arc is fragmented, but the fragmentation distributed rather than concentrated, the common case of slightly dirty optics or insufficient camera gain parameter.

 Thread Finish Inspection adopts visible light like an instrument. Visible light 100 million times more energetic than Infrared and 100 times less energetic than, i.e. the X-rays used for the Fill Level, Case and Crate Inspections

(to be continued)

Links to other pages:

                                                                                                            Copyright Graphene Limited 2013-2019