chromasens allPIXA, Руководство пользователя

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CD40047_R04_allPIXA_User-Manual.docx 194
Example:
Camera: allPIXA 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
1. Calculating image distance:
a. Calculating the magnification:
𝑚 =
𝐼𝑚𝑎𝑔𝑒𝑆𝑖𝑧𝑒/𝑚𝑚
𝑂𝑏𝑗𝑒𝑐𝑡𝑆𝑖𝑧𝑒/𝑚𝑚
b. Calculating the image distance:
𝐼𝑚𝑎𝑔𝑒𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒 = 𝐹𝑜𝑐𝑎𝑙𝐿𝑒𝑛𝑔ℎ𝑡 ∗ (𝑚 + 1)
Result is:
104,72 mm
2. Calculating the difference between image distance@infinite and flange length@infinite:
Image distance@infinite converged to focal length: 90.1 mm
Difference:
93.5 mm -90.1 mm = 3.4 mm
3. Calculating flange distance at working point:
Flange distance@working point:
104.72 mm + 3.4 mm =108.12 mm
4. Calculating the sum of the distances:
Real flange distance:
+ 108.12
Back focus of the allPIXA camera: - 17.526 mm (C-Mount)
Minimum offset focusing unit: - 20.0 mm
Sum: = 70.954 mm
Therefore, we use a
distance ring of 60.0 mm . This covers flange distances from 97.526
mm up to 122.56 mm.
Calculating the integration time
The relationship between the line frequency and the integration time is as follows:
𝐼𝑛𝑡𝑒𝑔𝑟𝑎𝑡𝑖𝑜𝑛𝑇𝑖𝑚𝑒/𝑠𝑒𝑐. =
1
𝐿𝑖𝑛𝑒𝐹𝑟𝑒𝑢𝑞𝑢𝑒𝑛𝑐𝑦/𝐻𝑧
For the calculation of the integration time the following parameters are necessary:
o
Maximum or nominal speed of the transport (mm/s)
o
Desired transport resolution (mm/pixel or dpi)
Calculate the integration time with the formula as follows:
𝑰𝒏𝒕𝒆𝒈𝒓𝒂𝒕𝒊𝒐𝒏𝑻𝒊𝒎𝒆 =
𝑻𝒓𝒂𝒏𝒔𝒑𝒐𝒓𝒕𝑹𝒆𝒔𝒐𝒍𝒖𝒕𝒊𝒐𝒏 (
𝒎𝒎
𝒑𝒊𝒙𝒆𝒍
)
𝑵𝒐𝒎𝒊𝒏𝒂𝒍𝑺𝒑𝒆𝒆𝒅 (
𝒎𝒎
𝒔 )
Note: If the transport resolution is stated in dpi and the speed in metric values, the values
have to be converted (1 inch= 25,4 mm).