IDS peak 2.8.0 / uEye+ firmware 3.33

To correctly determine the flange back distance of a uEye+ camera, you need to consider the distance between the lens flange and the active area of the sensor and, additionally, the type and thickness of any materials inserted into the optical path.

The "distance in air" between the threaded flange and the active area is 17.526 mm with C-mount/TFL-mount lenses and 12.50 mm with CS-mount lenses.

This "mechanical distance" can change due to the material-specific refractive index of the inserted materials. The glass cover of the sensor and all filters inserted into the optical path must be taken into account in the calculation.

Fig. 191: Calculating the flange back distance (schematic illustration)

You can use the following formula to calculate the mechanical flange back distance:

Calculation example: U3-304x-xx with IR-cut filter (a = 17.526 mm, d = 0.60 mm, nGlass = 1.50, f = 1 mm, nFilter = 1.00):

The tolerances for the position accuracy of the sensor and the filter descriptions are listed in the hardware descriptions of the respective camera family.

Calculating the flange back distance for cameras with C-mount

For cameras with C-mount, the flange back distance is a' = 17.526 mm.