Specifications
26
Alvium USB Cameras User Guide V1.1.0
Notes on specifications
Sensor
Absolute quantum efficiency (QE) plots
Measurements for color cameras were done with IR cut filter, measurements for
monochrome and S-Mount cameras were done without optical filters. With optical
filters, QE decreases by approximately 10%. The uncertainty in measurement of
the QE values is ±10.25%. This is mainly due to uncertainties in the measuring
apparatus itself (such as Ulbricht sphere and optometer).
Manufacturing tolerance of the sensor increases overall uncertainty.
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.
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.
Exposure time and frame rate
Exposure time values
Interdependencies between controls affect each other, see
Fixed frame rate control
The maximum frame rate which can be selected depends on various values, such
as available bandwidth, pixel format, exposure time, and region of interest (ROI).
Maximum frame rates
Data was calculated for minimum exposure time and full resolution, using Mono8
pixel format, for camera operation in free run mode. If cameras are triggered,
frame rates are lower. To increase frame rates, reduce region of interest and
exposure time.
Bandwidth adjustments
Consider the bandwidth available for camera payload depends on your individual
hardware, the operating system, software, and drivers, and your application. We
recommend you to adjust
DeviceLinkThroughputLimit
and
MaxTransferSize
to your requirements. See
