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Replacing the Lens and Field Calibration
With the VIVID 9i, three types of lens are available: WIDE lens, MIDDLE lens and TELE lens. Be sure to
mount the lens that best matches the subject’s size and distance. Before taking scans of a subject, most suitable
lens for the size of the object and distance must be used.
Note
After changing the lens, you need to recalibrate using the field calibration system. For Field Calibration, refer to page
32.
Relationship between Measurement Distance and Object
Select the most suitable lens by referring to the table given below.
M
emo
The closer the object to the VIVID 9i, the higher the measurement accuracy is. On the other hand, influences of shades
produced due to roughness on the surface of the object can be reduced if the object is positioned far from the VIVID 9i.
WIDE Lens
MIDDLE Lens
TELE Lens
Unit (mm)
Measurement Distance 500 600 800 1000 2500
Object Size
Horizontal 299 359 478 598 1495
Vertical 224 269 359 449 1121
Unit (mm)
Measurement Distance 500 600 800 1000 2500
Object Size
Horizontal 165 198 263 329 823
Vertical 124 148 198 247 618
Unit (mm)
Measurement Distance 500 600 800 1000 2500
Object Size
Horizontal 93 111 148 185 463
Vertical 69 83 111 139 347
Vivid910-hard-E.book Page 28 Monday, October 18, 2004 3:11 PM