By attachiBy attaching the micro scan lenses, scan fieng the micro scan lenses, scan fields down to 1lds down to 1mm x 1.2mm x 1.2mm aremm are
achieved at a fixed stand-off distance. The specialty of the micro scan lensesachieved at a fixed stand-off distance. The specialty of the micro scan lenses
is that the laser is that the laser beam nearly perpendicular meets the measurement surfacebeam nearly perpendicular meets the measurement surface
as also shown inas also shown infi
figugurere A.A.33for the OFV-CL-150. Without loss of signfor the OFV-CL-150. Without loss of signal quality,al quality,
mirror like objects can be scanned up to a tilt ofmirror like objects can be scanned up to a tilt of ±±4°.4°.
Undo the protective cap from the objective of the Undo the protective cap from the objective of the close-up unit and screw theclose-up unit and screw the
micro scan lens onto the objective.micro scan lens onto the objective.
The stand-off distances and scan fields of the different micro scan lenses areThe stand-off distances and scan fields of the different micro scan lenses are
shown inshown inta
tablblee A.A.22..
The nominal scan field values are suitable for orientation. Stronger zoom isThe nominal scan field values are suitable for orientation. Stronger zoom is
achieved by interpolation which might reduce the quality of achieved by interpolation which might reduce the quality of the video image.the video image.
Figure A.3: Function principle of the micro scan lensesFigure A.3: Function principle of the micro scan lenses
Table A.2: Stand-off distances and scan fields of the micro scan lensesTable A.2: Stand-off distances and scan fields of the micro scan lenses
Micro scanMicro scan
lenslens
Stand-offStand-off
distancedistance
11
Min.Min.
scan fieldscan field
(X x Y)(X x Y)
Nom.Nom.
scan fieldscan field
22
(X x Y)(X x Y)
Max.Max.
scan fieldscan field
(X x Y)(X x Y)
SpotSpot
diameterdiameter
33
Depth of fieldDepth of field
mmmm mmmm mmmm mmmm µµmm mmmm
OOFFVV--CCLL--8800 116600 11..2 2 x x 11..00 5 5 x x 44 114 4 x x 1100 77 00..44
OOFFVV--CCLL--115500 223300 11..8 8 x x 11..33 7 7 x x 55 223 3 x x 1177 1133 11..33
OOFFVV--CCLL--330000 338800 22..6 6 x x 33..55 110 0 x x 1144 446 6 x x 3355 2255 55..00
11
measured from the front panel of the scanning headmeasured from the front panel of the scanning head
22
at 18x at 18x optical zoomoptical zoom
33
with front lens model MRwith front lens model MR
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