Chromasens CD40127_R02 allPIXA_pro_User Manual.docx
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𝐼𝑚𝑎𝑔𝑒𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 𝐹𝑜𝑐𝑎𝑙𝐿𝑒𝑛𝑔𝑡ℎ ∗ (𝑚 + 1) = 104.72 𝑚𝑚
𝑂𝑏𝑗𝑒𝑐𝑡𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 𝐹𝑜𝑐𝑎𝑙𝐿𝑒𝑛𝑔𝑡ℎ ∗ (
𝑚 + 1
𝑚
) = 645,51 𝑚𝑚
𝑂𝑏𝑗𝑒𝑐𝑡𝐼𝑚𝑎𝑔𝑒𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 𝐼𝑚𝑎𝑔𝑒𝑆𝑖𝑧𝑒 + 𝑂𝑏𝑗𝑒𝑐𝑡𝑆𝑖𝑧𝑒 + 𝑀𝑎𝑖𝑛 𝑝𝑙𝑎𝑖𝑛 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 747.73
(w/o glass plates in the optical path)
11.2.2 Calculating the distance rings (tubes) for the allPIXA pro camera
Some applications require distance rings (tubes) for mounting the lens in the right position on
the allPIXA pro camera. This section shows an example how to calculate the length of the
distance ring.
To calculate the needed distance rings, you must get some information about the optical
setup:
Optical parameter:
Real focal length (from data sheet)
Image distance (calculated)
Parameters of the lens:
Back-flange length at infinite distance (from data sheet)
Parameters of additional focusing unit:
Minimum offset distance of the unit from flange of the lens
Maximum offset distance
Figure 36
Example:
Camera:
allPIXA pro camera 7300
Lens:
Linos Apo Rodagon 90 mm
90.1 mm real focal length
93.5 mm flange length@infinite
Focusing unit:
Modular Fokus
Minimum offset
20 mm
Maxium offset
45 mm
Object width/size:
450 mm
