67Alvium USB Cameras User Guide V4.6.1
Specifications
ON Semiconductor sensors
The curve in the absolute QE plots shown in this chapter is from the sensor
manufacturer data sheet. The information was correct at the time of publishing.
Sony sensors
Sony provides relative response curves in their sensor data sheets. To create the
absolute QE plots shown in this chapter, the relative response was converted to a
normalized QE response and then adjusted as per three measured QE values
(at 448 nm, 529 nm, 632 nm) for color sensors and one measured QE value
(at 529 nm) for monochrome sensors.
Wavelength
The wavelength range in the absolute QE plots reflects the information available in
the sensor manufacturer data sheet at the time of publishing. For additional
wavelength information, contact the sensor manufacturer.
Spectral response plots
The curves in the spectral response plots shown in this chapter were calculated
from measured quantum efficiencies at 448 nm, 529 nm, and 632 nm. The shape
of the curve is taken from the sensor data sheet but the values have been adjusted
based on these measured values. The uncertainty in measurement of the spectral
response values is ±10 percent.
Exposure time and frame rates
Specified values
Stated values were calculated (see Operation for maximum frame rates), then
verified with the test setup described in Table 16.
Deviations from stated frame rates can occur, especially when:
- The camera is operated in triggered mode
- Low bandwith is used
- Small ROIs are used.
Component Property
Desktop workstation Dell Precision T5500 Precision (EHW400)
Chipset Intel X5520
CPU Intel Xeon X5670 (6 cores)
CPU frequency 2.93 GHz
RAM 12 GB
Table 16: Test setup components
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