Introduction
1-4 Basler A500k Series
PRELIMINARY
1.3 Digital Responsivity
The specified digital responsivity is obtained if the gain is set to 98. The values are valid for the
monochrome chip. In addition, the output depends on the register setting for the digital shift. The
values given are typical values which can vary between different cameras:
For digital shift = 0: 400 DN/lx s @ 550nm
For digital shift = 1: 800 DN/lx s @ 550nm
For digital shift = 2: 1600 DN/lx s @ 550nm
For digital shift = 3: 3200 DN/lx s @ 550nm
LSB = least significant bit
See section 3.7.1 for the formula.
Example:
If the gain is set to 98, if digital shift is set to 0, and the quantity of light of 1 lux-sec has hit the
sensor, a gray value of 400 is output.
The quantum efficiency of the monochrome sensor is shown in Figure 1-1, and the quantum
efficiency of the color sensor in Figure 1-2. The quantum efficiency of the color sensor is slightly
lower than the quantum efficiency of the monochrome sensor. This is due to the color filter.
Figure 1-1: Spectral Response for Monochrome
A500k Cameras
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