Abstract: The invention generally relates to a compact, inexpensive-to-manufacture device consisting of few components for optically testing a surface. The zone on the surface that is to be investigated is illuminated by a semitransparent mirror and an aspheric field mirror, employing a telecentric optical train, and at least part of the light reflected or scattered by the surface is imaged onto the entrance pupil of the lens of an electronic camera by the field mirror, via the semitransparent mirror. Images recorded by the camera are analyzed using known image-processing methods.
Type:
Grant
Filed:
May 8, 2008
Date of Patent:
December 22, 2009
Assignee:
Intelligente Optische Sensoren und Systeme GmbH
Inventors:
Joachim Gaessler, Christian Konz, Harald Richter
Abstract: The invention generally relates to a compact, inexpensive-to-manufacture, device of few components for optically inspecting a surface and a method for same employing the device. The section of the surface to be investigated is illuminated by a semitransparent mirror and a field lens, employing a telecentric beam path, and at least part of the light reflected or scattered by the surface is imaged onto the entrance pupil of the optics of an electronic camera by the field lens, via the semitransparent mirror. All optical and electronic components, along with a light- and dust-tight housing, are carried on a specially configured mounting block such that they are self-aligning. The method for inspecting a surface involves automatically recording a series of images of the surface under various types of illumination situations. Those images are assembled into an image of the entire section of the surface to be investigated and analyzed using known image-processing methods.
Type:
Grant
Filed:
December 22, 2006
Date of Patent:
August 18, 2009
Assignee:
Intelligente Optische Sensoren Und Systeme GmbH
Inventors:
Joachim Gaessler, Christian Konz, Harald Richter
Abstract: The invention generally relates to a compact, inexpensive-to-manufacture device consisting of few components for optically testing a surface. The zone on the surface that is to be investigated is illuminated by a semitransparent mirror and an aspheric field mirror, employing a telecentric optical train, and at least part of the light reflected or scattered by the surface is imaged onto the entrance pupil of the lens of an electronic camera by the field mirror, via the semitransparent mirror. Images recorded by the camera are analyzed using known image-processing methods.
Type:
Application
Filed:
May 8, 2008
Publication date:
November 20, 2008
Applicant:
INTELLIGENTE OPTISCHE SENSOREN UND SYSTEME GMBH
Inventors:
Joachim Gaessler, Christian Konz, Harald Richter