Optical inspection apparatus

Optical inspection apparatus comprising:

• an observing device which develops the image of an inspection line on a linear arrangement of photoreceivers of a CCD array,
• an electronic evaluation means connected to the CCD array of the photoreceiver arrangement, and
• illuminating means in which a linear secondary light source is provided which extends beyond the length of the inspection line and is formed by the output side of a cross-section converter built up of light conducting fibers and having an input side which is matched to a light beam of circular cross-section,
• characterized in that
• the linear secondary light source is imaged onto the inspection line by a cylindrical mirror which extends parallel to the secondary light source over its entire length in order to generate at the inspection line an illuminated strip of uniform high luminous intensity;
• and
• in that the cylindrical mirror has grooves transverse to its axis of a width between 0.1 and 1 mm.

Optical inspection apparatus comprising:

• an observing device which develops the image of an inspection line on a linear arrangement of photoreceivers of a CCD array,
• an electronic evaluation means connected to the CCD array of the photoreceiver arrangement, and
• illuminating means in which a linear secondary light source is provided which extends beyond the length of the inspection line and is formed by the output side of a cross-section converter built up of light conducting fibers and having an input side which is matched to a light beam of circular cross-section,
• characterized in that
• the light conducting fibers of the cross-section converter are constructed of plastic and have a diameter of between 0.5 mm to 1.5 mm;
• the linear light source has a width defined by one or only a few light conductor ends;
• the linear secondary light source is imaged onto the inspection line by a cylindrical mirror which extends parallel to the secondary light source over its entire length in order to generate at the inspection line an illuminated strip of uniform high luminous intensity;
• and
• in that the cylindrical mirror has fine grooves oriented transverse to its axis.

Optical inspection apparatus comprising:

• an observing device which develops the image of an inspection line on a linear arrangement of photoreceivers of a CCD array,
• an electronic evaluation means connected to the CCD array of the photoreceiver arrangement, and
• illuminating means in which a linear secondary light source is provided which extends beyond the length of the inspection line and is formed by the output side of a cross-section converter built up of light conducting fibers and having an input side which is matched to a light beam of circular cross-section,
• characterized in that
• the linear secondary light source is imaged onto the inspection line by a cylindrical mirror which extends parallel to the secondary light source over its entire length in order to generate at the inspection line an illuminated strip of uniform high luminous intensity;
• a light entry surface of the cross-section converter is connected with a light exit surface of a light conducting rod acting as a homogenizer, a light entry surface of the rod being illuminated by the primary light source;
• a light exit surface of the light conducting rod is cemented to the light entry surface of the cross-section converter, with the diameter of the light conducting rod corresponding to the diameter of the light entry surface of the cross-section converter;
• and
• in that the cylindrical mirror has grooves transverse to its axis.

Optical inspection apparatus comprising:

• an observing device which develops the image of an inspection line on a linear arrangement of photoreceivers of a CCD array,
• electronic evaluation means connected to the CCD array of the photoreceiver arrangement, and
• illuminating means in which a linear secondary light source is provided which extends beyond the length of the inspection line and is formed by the output side of a cross-section converter built up of light conducting fibers and having an input side which is matched to a light beam of circular cross-section,
• characterized in that
• the linear secondary light source is imaged onto the inspection line by a cylindrical mirror which extends parallel to the secondary light source over its entire length in order to generate at the inspection line an illuminated strip of uniform high luminous intensity;
• a light entry surface of the cross-section converter is connected with a light exit surface of a light conducting rod acting as a homogenizer, a light entry surface of the rod being illuminated by the primary light source and defined by a mat surface;
• and
• in that the cylindrical mirror has fine grooves oriented transverse to its axis.

Optical inspection apparatus comprising:

• an observing device which develops the image of an inspection line on a linear arrangement of photoreceivers of a CCD array,
• electronic evaluation means connected to the CCD array of the photoreceiver arrangement, and
• illuminating means in which a linear secondary light source is provided which extends beyond the length of the inspection line and is formed by the output side of a cross-section converter built up of light conducting fibers and having an input side which is matched to a light beam of circular cross-section,
• characterized in that
• the linear secondary light source is imaged onto the inspection line by a cylindrical mirror which extends parallel to the secondary light source over its entire length in order to generate at the inspection line an illuminated strip of uniform high luminous intensity;
• ends of first and last light fibers of the linear light source as seen in a longitudinal direction of the linear secondary light source are freely arranged at their outwardly disposed ends so that two or more linear light sources can be arranged in series in their longitudinal direction without the formation of gaps between them;
• and
• in that the cylindrical mirror has fine waves or grooves transverse to its axis.

Optical inspection apparatus comprising:

• an observing device which develops the image of an inspection line on a linear arrangement of photoreceivers of a CCD array,
• electronic evaluation means connected to the CCD array of the photoreceiver arrangement, and
• illuminating means in which a linear secondary light source is provided which extends beyond the length of the inspection line and is formed by the output side of a cross-section converter built up of light conducting fibers and having an input side which is matched to a light beam of circular cross-section,
• characterized in that
• at least two linear secondary light sources are imaged onto the inspection line by a cylindrical mirror for each which extends parallel to the secondary light source over its entire length in order to generate at the inspection line an illuminated strip of uniform high luminous intensity;
• the cylindrical mirrors are arranged in a row without gaps between them and have a length corresponding to the length of the linear light sources associated with them;
• and
• in that the cylindrical mirror has fine waves or grooves transverse to its axis.

Optical inspection apparatus comprising:

• an observing device which develops the image of an inspection line on a linear arrangement of photoreceivers of a CCD array,
• electronic evaluation means connected to the CCD array of the photoreceiver arrangement, and
• illuminating means in which a linear secondary light source is provided which extends beyond the length of the inspection line and is formed by the output side of a cross-section converter built up of light conducting fibers and having an input side which is matched to a light beam of circular cross-section,
• characterized in that
• the linear secondary light source is imaged onto the inspection line by a cylindrical mirror which extends parallel to the secondary light source over its entire length in order to generate at the inspection line an illuminated strip of uniform high luminous intensity;
• in that the cylindrical mirror has fine waves or grooves transverse to its axis;
• and
• a plane mirror is provided at each end of the cylindrical mirror and is perpendicular to an axis of the cylindrical mirror to effect a virtual extension comprising at least one cylindrical mirror and light source.

Optical inspection apparatus comprising:

• an observing device which develops the image of an inspection line on a linear arrangement of photoreceivers of a CCD array,
• electronic evaluation means connected to the CCD array of the photoreceiver arrangement, and
• illuminating means in which a linear secondary light source is provided which extends beyond the length of the inspection line and is formed by the output side of a cross-section converter built up of light conducting fibers and having an input side which is matched to a light beam of circular cross-section,
• characterized in that
• the linear secondary light source is imaged onto the inspection line by a cylindrical mirror which extends parallel to the secondary light source over its entire length in order to generate at the inspection line an illuminated strip of uniform high luminous intensity;
• in that the cylindrical mirror has fine waves or grooves transverse to its axis;
• and
• an aperture stop is arranged on a central strip of the cylindrical mirror extending parallel to an axis of the cylindrical mirror for realizing a symmetrical dark field illumination system.