You can scan small objects at short distance using the close-up unit shown inYou can scan small objects at short distance using the close-up unit shown in
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figugurere A.A.11. Thereby the beam path of the laser is overlaid to the . Thereby the beam path of the laser is overlaid to the video imagevideo image
to equalize the parallax error.to equalize the parallax error.
To ensure a clearly visible laser spot on the video image, only a small part ofTo ensure a clearly visible laser spot on the video image, only a small part of
the laser light is used for the video camera. The size of the laser light is used for the video camera. The size of that part depends onthat part depends on
the back scattering properties of the surface. Two models of the close-up unitthe back scattering properties of the surface. Two models of the close-up unit
are available which have different special coated beam splitters:are available which have different special coated beam splitters:
for mat surfacesfor mat surfaces
(reduces the intensity of the laser (reduces the intensity of the laser light by 97%)light by 97%)
for for highly reflective surfaceshighly reflective surfaces
(reduces the intensity of the laser light by 99.8%)(reduces the intensity of the laser light by 99.8%)
If the intensity of the laser light is If the intensity of the laser light is still too high the supplied helium neon still too high the supplied helium neon blockblock
filter should be additionally mounted. The bfilter should be additionally mounted. The block filter is screwed directly to thelock filter is screwed directly to the
the camera aperture of the scanning head and reduces once more thethe camera aperture of the scanning head and reduces once more the
intensity of the laser light back intensity of the laser light back scattered to the video camera by scattered to the video camera by 98%.98%.
Figure A.1: Close-up unit OFV-056-CFigure A.1: Close-up unit OFV-056-C
Max. scan angle in x-direction:Max. scan angle in x-direction:±± 5°5°
Max. scan angle in y-direction:Max. scan angle in y-direction:±± 4°4°
DDiimmeennssiioonnss:: 113355mmm m x x 9900mmm m x x 110000mmm m aannddfig
figururee A.2A.2
WWeeiigghhtt:: 11..33kkgg
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