chromasens allPIXA, Руководство пользователя

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CD40047_R04_allPIXA_User-Manual.docx 193
Example:
Camera: allPIXA camera 7300 73 mm (10um/pixel * 7300 pixels)
Object width/size: 450 mm
Lens: 90.1 mm real focal length
-2.5 mm principal main plain distance
𝑚 =
𝐼𝑚𝑎𝑔𝑒𝑆𝑖𝑧𝑒
𝑂𝑏𝑗𝑒𝑐𝑡𝑆𝑖𝑧𝑒
= 0.162
𝐼𝑚𝑎𝑔𝑒𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 𝐹𝑜𝑐𝑎𝑙𝐿𝑒𝑛𝑔ℎ𝑡 ∗ (𝑚 + 1) = 104.72 𝑚𝑚
𝑂𝑏𝑗𝑒𝑐𝑡𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 𝐹𝑜𝑐𝑎𝑙𝐿𝑒𝑛𝑔ℎ𝑡 ∗ (
𝑚 + 1
𝑚
) = 645,51 𝑚𝑚
𝑂𝑏𝑗𝑒𝑐𝑡𝐼𝑚𝑎𝑔𝑒𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 𝐼𝑚𝑎𝑔𝑒𝑆𝑖𝑧𝑒 + 𝑂𝑏𝑗𝑒𝑐𝑡𝑆𝑖𝑧𝑒 + 𝑀𝑎𝑖𝑛 𝑝𝑙𝑎𝑖𝑛 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 747.73
(w/o glass plates in the optical path)
Calculating the distance rings for the allPIXA camera
Some applications require distance rings for mounting the lens in the right position on the
allPIXA camera. This section shows an example how to calculate the length of the distance ring.
To calculate the needed distance rings, you need 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 40
A calculation example is shown on the next page.