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US 2019/0164269 A1Published application
Method and device for optical examination of transparent bodies
AssigneeSCHOTT Schweiz AG
InventorsChristian KLÄGER, Andreas WIRTH, Jürgen THÜRK
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Abstract
A method and a device for optical examination of transparent bodies made of plastic, glass, or glass ceramic are provided. The examination is carried out by contactless detection and measurement of the body using optical imaging devices. For this purpose, a plurality of individual images are taken of the body during the examination in different positions relative to the imaging device, which are subsequently analyzed.
Claims20
A method for optical examination of transparent bodies, comprising:
- a) positioning a transparent body with an area to be examined within a capture range of an imaging device;
- b) capturing a first individual image of the body at a first rotational position using the imaging device;
- c) transmitting the individual image to a computer unit as a first digital image;
- d) rotating the body about an axis to a second rotational position;
- e) capturing a second individual image of the body using the imaging device at the second rotational position;
- f) transmitting the second individual image to the computer unit as a second digital image;
- g) controlling the computer unit to computationally compare the first and second images to produce a first difference image;
- h) controlling the computer unit to computationally develop the first difference image by cylindrical unfolding to provide a first unfolded difference image;
- i) repeating the steps d) through h) until at least one complete revolution of the body has been completed.
6 more elements
An inspection device for optical examination of a transparent body, comprising:
- an optical imaging device;
- a computer unit;
- an illumination device for illuminating the body;
- and
- a rotating device for rotating the body.
2 more elements
Dependencies are inferred from the claim text.