User`s manual

40 Piranha HS 4x User’s Manual
03-32-10040-03 PRELIMINARY DALSA Corp.
Figure 13: Direction of Web Movement using an Inverting Lens
Direction of Web
Object Movement
4.2 Optical Interface
Lens Mounts
All F-mount adapters have the appropriate back focal distance for the lens type being
used. Ensure that the image circle diameter of the lens to be used is as great as the length
of the imaging region. The following table provides information regarding the lens mount
used and the back focal distance. Distances to its inner flat surface and the outer flat
surface are provided.
Table 10: Lens Mounts
Mount Back Focal Distance (sensor die to adapter)
F-Mount 46.50 ±0.18
M42 x 1 6.56mm ±0.18—outer flat surface
Illumination
The amount and wavelengths of light required to capture useful images depend on the
particular application. Factors include the nature, speed, and spectral characteristics of
objects being imaged, exposure times, light source characteristics, environmental, and
acquisition system specifics, and more. DALSA’s Vision for Machines Web site,
http://vfm.dalsa.com/
, provides an introduction to this potentially complicated issue.
See “Radiometry and Photo Responsivity” and "Sensitivities in Photometric Units" in the
CCD Technology Primer found under the Application Support link.